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Instruction Manual —
Series 17CA3000
ChloralertTM Plus Multi-Gas Detector
325.6610.16 - 2 -
These instructions describe the installation, operation and maintenance of the subject equipment. Fail ure to strictly
follow these instructions can lead to an equipment rupture that may cause signifi cant property damage, severe per-
sonal injury and even death. If you do not understand these instructions, please call De Nora Water Technologies
for clar i fi ca tion before commencing any work at +1 215-997-4000 and ask for a Field Service Manager. De Nora Water Technologies, Inc. reserves the rights to make en gi neer ing refinements that may not be described herein. It is
the responsibility of the installer to contact De Nora Water Technologies, Inc. for information that cannot be
answered specifically by these instructions.
Any customer request to alter or reduce the design safeguards incorporated into De Nora Water Technologies
equipment is conditioned on the customer absolving De Nora Water Technologies from any consequences of
such a decision.
De Nora Water Technologies has developed the recommended installation, operating and main tenance procedures
with careful attention to safety. In addition to instruction/operating manuals, all instructions given on labels or
attached tags should be followed. Regardless of these efforts, it is not possible to eliminate all hazards from the
equipment or foresee every possible hazard that may occur. It is the responsibility of the installer to ensure that the
recommended installation instructions are followed. It is the responsibility of the user to ensure that the
recommended operating and maintenance instructions are followed. De Nora Water Technologies, Inc. cannot be
responsible deviations from the rec om mend ed instructions that may result in a hazardous or unsafe condition.
De Nora Water Technologies, Inc. cannot be responsible for the overall system design of which our equipment may
be an integral part of or any unauthorized modifi cations to the equipment made by any party other that De Nora Water Technologies, Inc.
De Nora Water Technologies, Inc. takes all reasonable precautions in packaging the equipment to prevent shipping
damage. Carefully inspect each item and report damages immediately to the ship ping agent involved for
equipment shipped “F.O.B. Colmar” or to De Nora Water Technologies for equipment shipped “F.O.B Jobsite”. Do
not install damaged equipment.
De Nora Water Technologies, COLMAR OPERATIONS
COLMAR, PENNSYLVANIA, USA
IS ISO 9001: 2000 CERTIFIED.
READ THE ENTIRE MANUAL BEFORE OPERATING
USE ONLY IN ACCORDANCE WITH INSTRUCTION MANUAL
WARNING: HAZARDOUS VOLTAGES.
PROTECTIVE GROUND (EARTH) TERMINAL
WARNING: FAILURE TO INSTALL, SET UP OR OPERATE
THE EQUIPMENT IN THE MANNER SPECIFIED BY De Nora Water Technologies MAY IMPAIR THE PROPER OPERATION OF THIS EQUIPMENT
- 3 - 325.6610.16
TABLE OF CONTENTSSAFETY SUMMARY .....................................................................................................................................................7
READ FIRST .............................................................................................................................................................8
1.0 INTRODUCTION ...............................................................................................................................................9
1.1 General ....................................................................................................................................................... 9
1.2 Model Number Breakdown ....................................................................................................................... 10
1.3 Specifi cations ............................................................................................................................................ 11
2.0 INSTALLATION ..............................................................................................................................................13
2.1 Inspection ................................................................................................................................................. 13
2.2 Location and Mounting ............................................................................................................................. 13
2.3 Receiver Electrical Connections ............................................................................................................... 13
2.4 Sensor/Transmitter Electrical Connections ............................................................................................... 17
3.0 FUNCTIONAL DESCRIPTION .......................................................................................................................19
3.1 General ..................................................................................................................................................... 19
3.2 Features .................................................................................................................................................... 19
3.2.1 Sensors/Transmitter ..................................................................................................................... 19
3.2.1.1 Gases ........................................................................................................................... 19
3.2.1.2 Gas Concentration Range ........................................................................................... 19
3.2.1.3 Outputs ........................................................................................................................ 20
3.2.1.4 Power Consumption ..................................................................................................... 20
3.2.1.5 Sensor Cross-Sensitivity .............................................................................................. 20
3.2.2 Receiver .................................................................................................................................. 20
3.2.2.1 Input Voltage ................................................................................................................ 20
3.2.2.2 Power Requirements .................................................................................................... 20
3.2.2.3 Receiver Outputs ......................................................................................................... 21
3.2.2.3.1 Analog Outputs (AO) .......................................................................................... 21
3.2.2.3.2 Digital Outputs (DO) .......................................................................................... 21
3.2.2.4 Keypad Push-button .................................................................................................... 21
3.2.2.5 Operating Modes ......................................................................................................... 22
3.2.2.6 Password ..................................................................................................................... 22
3.2.2.7 Display Modes ............................................................................................................. 23
3.2.2.8 Watchdog Timer Circuit ............................................................................................... 24
3.2.2.9 Self-Test ....................................................................................................................... 24
3.2.2.9.1 Standard Tests ................................................................................................... 24
3.2.2.9.2 Extended Tests ................................................................................................... 24
3.2.2.9.3 Self-test Failure Messages ................................................................................. 25
3.2.2.10 Sensor Check .............................................................................................................. 26
3.2.2.11 Calibration Mode ......................................................................................................... 27
3.2.2.12 Security and Safety ...................................................................................................... 28
3.2.2.12.1 Password ............................................................................................................ 28
3.2.2.12.2 Watchdog Timer ................................................................................................. 28
3.2.2.12.3 Power Failure ...................................................................................................... 28
3.2.2.13 Battery Operation......................................................................................................... 28
3.2.2.14 Operational Alarms ...................................................................................................... 28
3.2.2.14.1 Level ................................................................................................................... 29
3.2.2.14.2 Mode .................................................................................................................. 30
3.2.2.14.3 Latch .................................................................................................................. 30
3.2.2.14.4 Delay .................................................................................................................. 31
3.2.2.15 Event Displays .......................................................................................................... 32
3.2.2.15.1 Alarm Displays ................................................................................................... 32
3.2.2.15.2 Status Event Displays ......................................................................................... 32
3.2.2.15.3 Event Queues ..................................................................................................... 33
4.0 START-UP & OPERATION .............................................................................................................................36
4.1 Firmware Level .......................................................................................................................................... 36
4.2 Calibration Data ........................................................................................................................................ 36
4.3 Quick-Start ................................................................................................................................................ 37
325.6610.16 - 4 -
4.3.1 Data Entry .................................................................................................................................... 38
4.3.2 Confi guration ................................................................................................................................ 38
4.3.3 Setup ............................................................................................................................................ 39
4.3.3.1 Menu Navigation & Defaults .................................................................................................. 39
4.3.3.2 Select Sensor Channel .......................................................................................................... 41
4.3.3.3 Select Sensor Type ................................................................................................................ 41
4.3.3.4 Enter Sensor Calibration Parameters .................................................................................... 41
4.3.3.5 Confi gure Alarm .................................................................................................................... 42
4.3.3.6 Confi gure Digital Output ........................................................................................................ 43
4.3.3.7 Return to RUN MODE ............................................................................................................ 43
4.4 Menu Sequence ........................................................................................................................................ 43
4.4.1 Setup ............................................................................................................................................ 45
4.4.1.1 Direct Access ........................................................................................................................ 45
4.4.1.2 Password Protected .............................................................................................................. 45
4.4.2 Confi gure ..................................................................................................................................... 45
4.4.2.1 Instrument .............................................................................................................................. 45
4.4.2.1.1 Name ........................................................................................................................ 46
4.4.2.1.2 Engineering Units ..................................................................................................... 46
4.4.2.1.3 Display Mode ............................................................................................................ 47
4.4.2.1.4 Set Time .................................................................................................................... 47
4.4.2.1.5 Set Date .................................................................................................................... 47
4.4.2.1.6 Change Password .................................................................................................... 48
4.4.2.1.6.1 Override the Password ....................................................................................... 48
4.4.2.1.7 Default Database ...................................................................................................... 48
4.4.2.1.8 Set LCD Contrast ...................................................................................................... 48
4.4.2.1.9 Sensor Check ........................................................................................................... 49
4.4.2.1.10 Run Self-Test ............................................................................................................. 50
4.4.2.1.11 Enter Confi guration Code ......................................................................................... 51
4.4.2.1.12 Custom Average Hours ............................................................................................ 51
4.4.2.1.13 Battery Status ........................................................................................................... 51
4.4.2.1.14 Software Version ....................................................................................................... 52
4.4.2.2 Channels ............................................................................................................................... 52
4.4.2.2.1 Tag Name ................................................................................................................. 52
4.4.2.2.2 Sensor Type .............................................................................................................. 53
4.4.2.2.3 Alarm (1,2, or 3) ........................................................................................................ 53
4.4.2.2.3.1 Level ................................................................................................................... 53
4.4.2.2.3.2 Mode .................................................................................................................. 53
4.4.2.2.3.3 Latch .................................................................................................................. 54
4.4.2.2.3.4 Delay .................................................................................................................. 54
4.4.2.2.4 Analog Output .......................................................................................................... 54
4.4.2.2.4.1 Output ................................................................................................................ 54
4.4.2.2.4.2 Span ................................................................................................................... 55
4.4.2.2.4.3 Zero .................................................................................................................... 55
4.4.2.2.4.4 Mode .................................................................................................................. 56
4.4.2.2.4.5 Calibration (Analog Output Parameters) ............................................................ 56
4.4.2.2.5 Calibration (Sensor Parameters) .............................................................................. 57
4.4.2.2.5.1 Concentration ..................................................................................................... 57
4.4.2.2.5.2 Span ................................................................................................................... 57
4.4.2.2.5.3 Zero .................................................................................................................... 57
4.4.2.2.5.4 Sensor Data........................................................................................................ 58
4.4.2.3 Digital Outputs ....................................................................................................................... 58
4.4.2.3.1 Source ...................................................................................................................... 58
4.4.2.3.2 Invert ......................................................................................................................... 59
4.4.2.3.3 State .......................................................................................................................... 59
4.4.2.4 Comm Port ........................................................................................................................... 59
4.4.2.4.1 Baud Rate ................................................................................................................. 60
4.4.2.4.2 Instrument Address .................................................................................................. 60
4.4.2.4.3 Parity ......................................................................................................................... 60
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4.4.2.4.4 Datalink Enable ......................................................................................................... 61
4.4.2.4.5 Datalink Protocol ....................................................................................................... 61
4.4.3 Run Calibration ....................................................................................................................... 61
4.4.4 Stop Calibration ...................................................................................................................... 62
5.0 CALIBRATION ................................................................................................................................................ 63
5.1 Sensor Calibration ............................................................................................................................ 63
5.1.1 Setup ............................................................................................................................ 63
5.1.2 Source ............................................................................................................................ 63
5.1.3 Calibration ............................................................................................................................ 63
5.1.3.1 General Calibration Overview .......................................................................................... 63
5.1.3.2 ZERO Calibration Procedure ............................................................................................ 65
5.1.3.3 SPAN Calibration Procedure ............................................................................................ 66
5.2 Analog Output Calibration ......................................................................................................................... 66
5.2.1 Minimum Output Current Calibration ...................................................................................... 67
5.2.2 Maximum Output Current Calibration ..................................................................................... 67
6.0 COMMUNICATIONS ...................................................................................................................................... 68
6.1 General ...................................................................................................................................................... 68
6.2 Interconnections ........................................................................................................................................ 68
6.2.1 RS232 Plug Connections ........................................................................................................ 69
6.2.2 RS422/485 Plug Connections ................................................................................................. 69
6.3 Confi guring the System Module for Datalink ............................................................................................. 70
6.4 Protocol ...................................................................................................................................................... 70
6.4.1 Message Types ...................................................................................................................... 71
6.4.1.1 Host to Instrument ............................................................................................................ 71
6.4.1.2 Instrument to Host ............................................................................................................ 72
6.4.2 Transaction Examples............................................................................................................. 72
6.5 Mnemonic-to-Datapoint Cross Reference ................................................................................................. 72
6.5.1 Database Starting Addresses ................................................................................................ 73
6.5.2 Instrument Memory Address Scheme .................................................................................... 73
6.6 Executing Instrument Self Tests Using Datalink ........................................................................................ 74
6.7 Database Prompt-to-Datapoint Cross Reference ...................................................................................... 75
7.0 MAINTENANCE.............................................................................................................................................. 81
7.1 General ...................................................................................................................................................... 81
7.2 Routine Maintenance ................................................................................................................................. 81
7.3 Sensor/Transmitter Replacement ............................................................................................................... 81
7.4 Troubleshooting .......................................................................................................................................... 82
7.4.1 General Troubleshooting ........................................................................................................ 82
7.4.2 Sensor Troubleshooting .......................................................................................................... 83
LIST OF FIGURES
Figure 1-1 Basic System Confi guration ......................................................................................................................... 9
Figure 1-2 Receiver Data Tag ...................................................................................................................................... 10
Figure 2-1 Receiver Outline Dimensions ..................................................................................................................... 14
Figure 2-2 Sensor/Transmitter Outline Dimensions ..................................................................................................... 15
Figure 2-3 Interconnection Diagram ........................................................................................................................... 16
Figure 2-4 Sensor Wiring ............................................................................................................................................. 18
Figure 3-1 Chloralert Plus Keypad .............................................................................................................................. 22
Figure 3-2 Basic Alarm Operation ............................................................................................................................... 29
Figure 3-3 Self-Resetting Alarm Operation ................................................................................................................. 31
Figure 3-4 Latching Alarm Operation .......................................................................................................................... 31
Figure 4-1 Receiver Data Tag ...................................................................................................................................... 36
Figure 4-2 Sensor Calibration Tag ............................................................................................................................... 36
Figure 4-3 Startup Phases .......................................................................................................................................... 37
Figure 4-4 Receiver Data-Entry Keypad ...................................................................................................................... 38
Figure 5-1 Label & Magnet Orientation ....................................................................................................................... 64
Figure 6-1 RS-232 or RS-485 Datalink Module ........................................................................................................... 68
Figure 6-2 RS-232 Plug Connector ............................................................................................................................. 69
Figure 6-3 RS-485 Plug Connector ............................................................................................................................. 69
Figure 6-4 Floating Point Examples ............................................................................................................................. 73
325.6610.16 - 6 -
LIST OF TABLES
Table 2-1 Sensor Wiring and Confi guration ......................................................................................................... 17
Table 3-1 Gas Cross-Sensitivity Data .................................................................................................................. 20
Table 4-1 Factory Default Database Parameters ................................................................................................ 40
Table 6-1 System Prompts (Datalink) .................................................................................................................. 70
Table 6-2 Datalink Protocol ................................................................................................................................. 71
Table 6-3 Datapoint Types ................................................................................................................................... 73
Table 6-4 Database Starting Addresses ............................................................................................................. 74
Table 6-5 Datapoint Addresses ........................................................................................................................... 72
Table 6-6 Prompt-to-Datapoint Cross Reference ........................................................................................... 75-80
- 7 - 325.6610.16
SAFETY SUMMARY
GENERAL
WARNINGS
RETURN OF EQUIPMENT
All equipment being returned to De Nora Water Technologies for repair must be free
of any hazardous materials. Contact De Nora Water Technologies for
authorization prior to returning equipment.
INSTRUCTION MANUALS
Do not install, maintain or operate this equipment without reading, understanding
and fe ollowing the proper De Nora Water Technologies instructions and manuals, other wise injury or damage may result.
ELECTRICAL SHOCK HAZARD
Equipment powered by AC line voltage presents a potential electric shock hazard
to the user. Make certain that the system power is disconnected from the operating
branch circuit before attempting electrical interconnections of service.
SPECIFIC WARNINGS ELECTRICAL SHOCK HAZARD
Equipment powered by AC line voltage presents a potential electric shock hazard.
Servicing of the Chloralert Plus should only be attempted by a qualifi ed electronics
technician.
WARNING: ELECTRIC SHOCK HAZARD
Equipment powered by AC line voltage presents a potential electric shock hazard to
the user. Make certain that the system power input and Digital Output replay
connections are disconnected from the operating branch circuit before attempting
to connect Sensors to the Receiver. (pg.17 )
All alarm operation is temporarily totally disabled during this test. (pg.51)
There is no automatic link between this menu entry and the units selected in the
Engineering Units menu (refer to section 4.4.2.1.2) or the range selected in the
Sensor Type menu. The operator must be careful to select a level value entry that
is within the instrument’s operating range, otherwise the alarms will not operate.
(pg.53)
325.6610.16 - 8 -
SPECIFIC After making Sensor/Transmitter electrical connections, care must be taken to replace the
CAU TIONS Sensor/Transmitter wiring box cover properly. The wiring box is not perfectly square (refer to
Figure 2-2) and the cover must be aligned properly to the box in order for the gasket to seal
the box properly. (pg.17)
In SETUP, ALARM, and DATA modes, gas monitoring continues to take place even though
concentration values are not shown on the display. However, when in SETUP, selection of
CALIBRATE, SELF-TEST, or SENSOR-CHECK functions will temporarily suspend normal g a s
monitoring. (pg.24)
When power is restored after a power failure, displayed averages will be reset and valid data
will not be available until 15 minutes or 8 hours have been accumulated for the STEL and TWA
modes re spec tive ly. (pg.30)
Averaging data will be accumulated from the time the RUN CALIBRATION key is pressed until
the calibration process is actually begun by activating the Sensor’s magnetic switch. Once
Calibration has been activated, data accumulation is sus pended until Calibration is completed.
Data ac cu mu la tion is suspended during SENSOR CHECK, CALIBRATION (begins when the
sensors magnetic switch is activated) and SELF-TEST. (pg.30)
If the measured gas concentration exceeds the maximum range, the data will be accumulated
at the maximum range rate. The average data after the over-range event will be in error for the
next av er ag ing period. The over-range event is displayed and may also be retrieved from the
data archive. If the in stru ment is set up such that alarm level 3 is at the maximum range, remote
notifi cation of this type of occurrence is possible. (pg.30)
The value of the gas concentration entered must be within the range selected from the SEN SOR
TYPE menu (refer to section 4.4.2.2.2), otherwise an erroneous operation will result. (pg.55)
If cleaning of the sensor housing is performed, do not clean the Sensor/Transmitting housing
with cleaners containing strong mineral acids or organic solvents such as ketones, chlorinated
hy dro car bons, or aromatics. Using such cleaners may damage the housing materials. Clean ing
of the sensor housing materials should only be performed using soap and water. (pg.81)
Sensor removal must be done by pulling the sensor from the circuit board without rotating or
twisting the sensor. Ro ta tion will cause serious damage to the sensor pins. (pg.82)
READ FIRST
WARNING
INSTRUCTION MANUALS
Do not install, maintain, or operate this equipment without reading, understanding and following the proper De Nora Water Technologies instructions and manuals, otherwise
injury or damage may result.
RETURN OF EQUIPMENT
All equipment being returned to De Nora Water Technologies for repair must be
free of any haz ard ous materials. Contact De Nora Water Technologies for
authorization prior to returning equipment.
This instruction bulletin contains general operating information about the Chloralert Plus Multi-Gas Detector as well
as instructions for installation and troubleshooting.
Read these instructions before starting installation.
Save these instructions for future reference.
- 9 - 325.6610.16
1.0 INTRODUCTION
1.1 General
The Chloralert Plus multifunction gas-leak detector is designed to be used for the detection and
monitoring of Chlorine (Cl2) and Sulfur Dioxide (SO
2) in ambient air. It also ac ti vates audio and visual alarms in
the event that the concentration of these gases ex ceeds pro gram ma ble preset levels. The basic system consists
of the Receiver and one to four Sensor/Transmitters and has pro vi sion for additional optional features (refer to
Figure 1-1). In use, the sensor assemblies are mounted near the potential sources of leaks or emissions. The
receiver assembly may be located up to 1000 ft from the sensor. It converts the signal from the sensor/trans mit ter
to the digital display of gas con cen tra tion, activates alarm(s) or other safety devices, transmits 4-20 mA signals
for recording or control purposes, and permits serial communication via RS485 or RS232 protocols.
The receiver is available as a wall mounted, NEMA 4X enclosure 10.9W x 8.6H x 5.3 inches deep con tain ing a main
circuit board, keyboard, and display. The electronics consist of a power supply and signal-processing circuitry
for up to four sensor inputs, battery charging circuit for an optional external battery back-up, a malfunction relay
and two alarm relays. Support for three sep a rate optional electronics packages is included on the main board:
Communications (RS232 or RS485), 4 channels of 4-20 mA analog outputs, and six additional digital output relays
(SPST). All relays are rated at 1.5/240VAC.
The receiver is supplied with three conduit connectors for sensor, replay, and ac power con nec tions. An ad di tion al
four conduit connectors for optional accessories are supplied in a separate bag.
The sensor includes dedicated transmitter electronics because of individual sensor setup requirements and is
currently available in four types (Cl2 & SO
2). A waterproof package (NEMA 4X) consists of a factory-calibrated
assembly containing sensor and solid state electronics. The sensors are powered from the receiver which will
power 4 sensors for a minimum of 24 hours during a power outage when supplied with the optional back-up bat-
tery. Appropriate cable lengths may be ordered separately.
A sensor-check (auto-generator) feature is available for each sensor type. It consists of a small gas gen er a tor
which is assembled on the end of the sensor and is wired in the junction box assembly. This allows testing of the
sensor’s integrity and verifi es that the sensor is functioning properly.
Figure 1-1 Basic System Confi guration
325.6610.16 - 10 -
1.2 Model Number Breakdown
The following table shows the individual fi elds of the instrument’s model number and the selections
available for each. Refer to the re ceiv er’s data tag (shown below) for the specifi c model number
con fi g u ra tion of the instrument.
17CA3
Enclosure
Standard Wall Mounting 1
Standard With key Locked door 2
Analog Outputs
None 0
4 ANO 1
Digital Outputs
3 DO 0
9 DO 1
Design Level A
Communications
None 0
RS485 1
RS232 2
Sensor Channel - Calibrated with Detector*
Not Required 0 0 0 0
Chlorine Sensor - (0-5 PPM) 1 1 1 1
Chlorine Sensor - (0-10 PPM) 2 2 2 2
Chlorine Sensor - (0-50 PPM) 3 3 3 3
Chlorine Sensor with Sensor Check - (0-5 PPM) 4 4 4 4
Chlorine Sensor with Sensor Check - (0-10 PPM) 5 5 5 5
Chlorine Sensor with Sensor Check - (0-50 PPM) 6 6 6 6
Sulfur Dioxide Sensor - (0-10 PPM) 7 7 7 7
Sulfur Dioxide Sensor - (0-20 PPM) 8 8 8 8
Sulfur Dioxide Sensor - (0-100 PPM) 9 9 9 9
* Specify type and quantity of sensor(s) required (4 maximum)
- 11 - 325.6610.16
1.3 Specifi cations SYSTEM:
Gases Chlorine
Sul fur Dioxide
Channels/Gases 4 max., channels and gas interchangeable
for each receiver
Gas Conc. Ranges Chlorine: 0-5, 0-10, 0-50 ppm
Sulfur Dioxide: 0-10, 0-20, 0-100 ppm
Ambient Temperature Receiver: -5 to +55°C (23 to 131°F)
Sensor: -30 to +55°C (-22 to 131°F)
Ambient Pressure: 0.8 to 1.2 atmospheres
AC POWER:
Voltage Range 93.5 to 276 Vac
Frequency Range 47-63 Hz
Power Consumption Receiver- 10 watts nominal, 12 watts max.
Electrochemical Sensor/Transmitter- 0.5 watts max.
Voltage Dropout Duration < 20 ms
Permitted
RECEIVER:
Signal Digital Communication
RS 232/485 (optional),
4-20 mA each channel (optional)
Relays 3 SPDT Standard, Additional 6 SPST optional
Relay contacts rated at 3.15 Amps/240 Vac
Optional relays are fi eld replaceable
Annunciators Flashing display indication for concentration alarms and other
signifi cant events. Display backlight turned off during battery
operation or if battery is faulty.
Alarm Levels Selectable, 3 programmable concentration alarm levels
for each channel.
Alarm Modes Selectable, TWA, Instantaneous, STEL, and Customer Defi ned
Alarm Operation Selectable, normal (self-resetting), latched and delayed.
Display Back-lit LCD, 2 lines x 20 characters
Keyboard Polyester, 20 tactile key position
Diagnostics System, power and sensor failure
Security Password-protected
325.6610.16 - 12 -
Max. Distance Receiver to
Sensor/Transmitter: 1000 ft.
Wires (Xmttr/Receiver) 2
Sample Draw None
Sensor Check Optional
Housing
Sensor/Transmitter:
Dimensions: 3.2 in.(W) x 11.0 in.(H)* x 2.2 in.(D)
*12.6 in.(H) with gas-generator
Weight: 1 lb.
Materials: Electronic Housing Tube-PVC
Junction Box-polycarbonate
Receiver:
Dimensions: 10.9 in.(W) x 8.6 in.(H) x 5.3 in.(D)
Weight: 5 lb.
Materials: Enclosure-polystyrene
Clear Front-polycarbonate
Battery:
Dimensions: 10.5 in.(W) x 9.0 in.(H) x 6.5 in.(D)
Weight: 15 lb.
Mounting: Wall
ENCLOSURES: NEMA 4X(IP65)
OPTIONS:
4 ANO Option Contains circuitry for transmitting four 0-20 mA or 4-20 mA analog
current outputs proportional to gas concentration levels. The analog
outputs are not isolated since they all share the same “circuit
common” return point (Refer to Figure 2-4).
6 DO Option Contains six additional SPST relay circuits, thus allowing for two
relays for each gas channel.
Communications Plug-in models for RS232 or RS485
ACCESSORIES:
External Battery Includes battery (w/storage case) allowing a minimum of 24 hours
of operation
Sensor Cable Available in any length (in feet) up to 1000 ft. max.
Sensor-Check Generators Attach to end of sensor. Discharge gas into the sensor to verify
sensor and receiver operation. Con trolled by the Receiver.
SENSOR:
Sensor Type Electrochemical (EC)
Minimum Detectable Chlorine: 0.1 ppm
Concentration Sulfur Dioxide: 0.1 ppm
Calibration Mode automatic, remote single person, non-intrusive
- 13 - 325.6610.16
2.0 INSTALLATION
2.1 Inspection
The equipment should be inspected for damage that may have occurred during ship ment. All damage should
be reported to the shipping agent. If the equipment is dam aged to the extent that faulty operation may result,
contact De Nora Water Technologies before installation. Always reference the complete in stru ment serial
number and model number in all correspondence con cern ing the equipment sup plied.
2.2 Location and Mounting
The Model 17CA3000 Chloralert Plus Receiver may be wall-mounted close to the gas sensor(s) or may be
located up to 1000 feet from the sensor(s). Refer to Figure 2-3 for the rec om mend ed in ter con nec tion diagram.
Mount ing-ears are supplied with the Receiver and the Sensor/Transmitter and may be used for convenient
wall-mounting (Refer to Figures 2-1 and 2-2 re spec tive ly). The mounting ears may be oriented in several
directions to facilitate convenient mounting. It is recommended that both receiver and sensor/transmitter
be oriented vertically as shown in Figure 1-1. Mounting screws or any other mounting hardware desired or
required is supplied by the customer.
The receiver case is supplied, confi gured with three ½-NPT conduit fi ttings for customer wiring (Refer to Figure
2-1). The receiver enclosure contains four additional knockouts for attachment of additional conduit fi ttings.
These provide a means of wiring optional features like digital com mu ni ca tions, analog outputs, battery backup
and alarms.
Select a location which gives limited access to unauthorized personnel and where ambient temperature remains
within the temperature range specifi ed in section 1.3. The installation area should be well
ventilated and provided with a source of heat, if necessary, to ensure that the ambient temperature does not
fall below the specifi ed minimum temperature.
The selected location must be of suffi cient size to provide necessary equipment clearances and to allow easy
access for routine inspection and maintenance of the Chloralert Plus Receiver and its gas sensor/transmitters.
Refer to Figures 2-1 and 2-2 for outline dimensions of the Chloralert Plus Receiver and Sensor/Transmitter
Assembly respectively.
Locate the sensor module 12" to 36" (305 to 915 mm) from the fl oor with the sensor pointed downward.
2.3 Receiver Electrical Connections
Electrical wiring including AC power, sensor and alarm relay in ter con nec tions should be per formed in
ac cor dance with the interconnection diagram shown in Figure 2-3. Refer to section 2.4 for detailed sensor/
trans mit ter as sem bly wiring.
WARNING
ELECTRICAL SHOCK HAZARD. Equipment powered by AC line voltage
presents a potential electric shock hazard to the user. Servicing of the
Chloralert Plus should only be attempted by a qualifi ed elec tron ics technician.
325.6610.16 - 14 -
Fig
ure
2-1
Receiv
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imen
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- 15 - 325.6610.16
Fig
ure
2-2
Sen
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itte
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imen
sio
ns
325.6610.16 - 16 -
Fig
ure
2-3
In
terc
on
nectio
n D
iag
ram
- 17 - 325.6610.16
Although the above table shows recommended wiring, a sensor may be wired to any CHANNEL as long as
the confi gured CHANNEL corresponds to the terminals to which the sensor is wired. For example, a single
sensor may be wired to the S3+ AND S3- terminals as long as the CHANNEL 3 is confi gured for that sensor
in the confi guration menu. Wiring a sensor to S2+ and S2- terminals and confi guring CHANNEL 1 will cause
a sensor alarm to be generated.
CAUTION
After making sensor/transmitter electrical connections, care must be
taken to replace the sensor/transmitter wiring box cover properly. The wiring
box is not perfectly square (refer to Figure 2-2) and the cover must be aligned
properly to the box for the gasket to seal the box properly.
2.4 Sensor/Transmitter Electrical Connections
WARNING
ELECTRICAL SHOCK HAZARD. Equipment powered by AC line
voltage presents a potential electrical shock hazard to the user.
Make certain that the system input and digital output relay con nec tions
are dis con nect ed from the operating branch circuit branch circuit before
attempting to con nect sensors to the receiver.
Precautions must be taken to insure that the sensor/transmitter assembly is correctly wired to the receiver. The
sensor/transmitter assembly interfaces with the receiver circuitry via the sensor interface, terminal block TB3.
This terminal block consists of 12-positions organized into 3 terminals for each of the four possible sensors.
Each sensor is wired to a S+, S- and SHD (shield) terminal.
Sensor wiring for the Chlorine Electrochemical Sensor is shown in Figure 2-4. The example shown in the fi gure
shows a single sensor wired to terminals S1+ and S1- on TB3. These terminals correspond to CHANNEL 1 in the
SETUP-CONFIGURATION-CHANNELS menu selection dis cussed in chapter 4.0, START-UP AND OP ER A TION.
For a single-sensor system, it is recommended that the sensor be con nect ed to the S1+ and S1- terminals and
that it be confi gured as CHANNEL 1 in the fi rmware. The sensor wires are polarized and the RED wire must
be con nect ed to the “+” terminal while the BLACK wire connects to the “-“ ter mi nal. As men tioned previously,
the fi gure shows wiring for a single-sensor system. If ad di tion al sensors are being used, the suggested wiring
confi guration is shown in Table 2-1 below.
Table 2-1 Sensor Wiring and Confi guration
Number of Sensors Sensor Terminals Channel
1 1 S1+, S1 1
2 12
S1+, S1-S2+, S2-
12
3 123
S1+, S1-S2+, S2-S3+, S3-
123
4 1234
S1+, S1-S2+, S2-S3+, S3-S4+, S4-
1234
WARNING
Calibrated Sensors are calibrated to a specifi c channel on the
gas detector and are required to be wired as such
325.6610.16 - 18 -
Figure 2-4 Sensor Wiring
- 19 - 325.6610.16
3.0 FUNCTIONAL DESCRIPTION
3.1 General
The 17CA3000 Chloralert Plus normally consists of two distinct elements, the sensor/trans mit ter and the receiver.
The sensor/transmitter is located near potential sourc es of gas leaks or emis sions while the receiver is located
remotely in a control room, al though in some instances, they may both be located at the same site.
Both elements of the device have inputs and outputs. The sensor/transmitter is powered by the receiver to
operate the electronics as well as the sensor, it transmits a multiplexed frequency-modulated (FM) signal to
the receiver. This conditioned sensor signal is a function of the gas con cen tra tion being monitored by the
sensor. The receiver accepts the sensor/transmitter input, converts it to a display of the gas concentration,
activates alarms and other safety devices, and transmits an analog output current signal (if so confi gured) for
recording or control purposes. Additionally, setup and confi guration data are available via an optional remote
serial data communications port. The receiver may also receive information such as that needed for a set up
and cal i bra tion from an ex ter nal computer via this datalink (Refer to section 6.0).
The receiver is also used to set up the database for the various alarm functions and the re quired cal i bra tion
information. Several alarm modes are available; In stan ta neous, STEL, TWA, or Custom. It also provides
information during the calibration procedure about the status of the cal i bra tion as it proceeds.
The main board in the receiver contains the power supply for all sensor/trans mit ters, the mi cro pro ces sor, three
(standard) programmable alarm relays and associated electronics. Four optional features are available:
Four 0-20 mA or 4-20 mA ANALOG OUTPUTS for transmission of the gas
con cen tra tion levels.
Six additional DIGITAL OUTPUT relays
RS232 or RS485 Communications Port
Battery Backup
The purpose of this chapter is to give an overview of some of the features of the 17CA3000. For actual
op er a tion al and data-entry procedure, refer to sec tion 4.0.
3.2 Features
3.2.1 Sensor/Transmitter
3.2.1.1 Gases
Presently, the system is designed to monitor two gases:
Chlorine
Sulfur Dioxide
3.2.1.2 Gas Concentration Range
The Chloralert Plus uses frequency to transmit the sensor/trans mit ter information to the
receiver. The accuracy for any given con cen tra tion is then determined by the concentration
used for calibration.
325.6610.16 - 20 -
3.2.1.3 Outputs
The output of the sensor/transmitter is wired directly to a terminal block in the re ceiv er so care
should be taken that the sensor is correctly connected to the receiver (refer to section 2.4). If
the sensor/transmitter is connected incorrectly, no damage will occur but the LED indicator on
the sensor/trans mit ter will not light and the LCD display on the receiver will indicate “BAD ID”.
The output of the sensor/trans mit ter con sists of two multiplexed frequencies which provide
in for ma tion for ambient temperature and sensed gas concentration. Refer to section 7.4.2 for
additional information.
3.2.1.4 Power Consumption
Nominal power requirement for the sensor/transmitter is approximately 0.5 watts per
individual sensor.
3.2.1.5 Sensor Cross-Sensitivity
The sensor may also be responsive to gases in sampled air other than the target gas. The
degree of the sensitivity may cause an error in the concentration reading of the target gas.
Table 3-1 below shows the typical con cen tra tion errors to be expected when a chlorine sensor
is exposed to the indicated concentrations of “interference” gases.
Table 3-1 Gas Cross-Sensitivity Data
Sensor response to an instantaneous change of 50% relative humidity would be a chlorine
equivalent of approximately +/-0.5 ppm lasting for 2 minutes with no permanent effect. Longer-
term changes in relative humidity (>5 minutes) have no effect.
3.2.2 Receiver
3.2.2.1 Input Voltage
The receiver is designed to operate on any voltage between 93.5 and 276 Vac without the
need for the customer to make adjustments should he decide to change voltage sources.
The sensor/transmitter is powered by the receiver.
3.2.2.2 Power Requirements
Overall system power requirements range from 10 to 14 watts and varies depending on which
system features are activated. Optional backup power is avail able to provide power during
AC power losses. Bat tery life is at least 24 hours with all sensors and options active. Battery
charge is au to mat i cal ly main tained by the receiver and no operator in ter ven tion is required.
Gas Concentration
(ppm)
CF Equivalent
(ppm)
Carbon Monoxide 300 0
Hydrogen Sulphide 15 approx. -0.5
Sulphur Dioxide 5 0
Nitric Dioxide 35 0
Nitrogen Dioxide 5 approx. 5
Hydrogen 100 0
Hydrogen Cyanide 10 0
Hydrogen Chloride 5 0
Ethylene 100 0
- 21 - 325.6610.16
3.2.2.3 Receiver Outputs
The outputs of the receiver fall into two categories
Analog - gas concentration data as a linear current output
Digital - relay contact-closure
3.2.2.3.1 Analog Outputs (AO)
An optional 4-20 mA or 0-20 mA analog output linearly proportional to sensed gas
concentration is available on terminal block TB1 for each sensor channel. The
analog output specifi cations are given below:
Feature Specifi cation
Max. Number 4
Rated Signal Range 0-20 mA or 4-20 mA
Control Range 0-21.5 mA
No-Load Voltage to 24 V
Load Range 900 ohms
Filter Time Constant 50 ms
Output Measurement Error < +/- 0.02 mA
Temperature Coeffi cient < +/-0.02 mA/°C
The analog outputs are not isolated since they all share the same “circuit common”
return point (Refer to Figure 2-4).
3.2.2.3.2 Digital Outputs (DO)
Three SPDT relay outputs are standard on the Chloralert Plus main circuit board.
Access to normally open (NO) and normally closed (NC) contacts is provided via
terminal block TB2.
A circuit board with an additional six output relays with SPST normally open (NO)
contact ar range ment is available as an option to provide additional alarm functionally,
if desired. Contact outputs are available on TB1.
The inputs that control the digital output (DO) relays are selected by the operator using
the receiver’s SETUP-CONFIGURATION-DIGITAL OUTPUTS mode (Refer to section
4.4.2.3). The Chloralert Plus is able to be confi gured by the customer to allow control
of all DO’s by a single input or to allow each DO to be controlled by a different input.
The operator should maintain a listing of the functions as signed to each digital output.
The need for separate relays for each channel depends on the device connected to the
relay and the location of the various sensor/transmitters. If each of these is mounted
remotely in different locations then each channel requires dedicated relays to alert
attending personnel of a gas release.
The normal/delayed option allows the operator to cope with output surges that are due
to electrical pickup rather than a genuine gas exposure. This mode is only important
whenever the alarm is set to in stan ta neous con cen tra tion, not TWA or STEL. This alarm
delay may be used to eliminate alarms during power-up (refer to section 4.3), thereby
elim i nat ing false alarms.
3.2.2.4 Keypad Push-button
The keypad contains a total of 20 push-button arranged in a 4-row x 5-column
matrix. The keypad layout is shown in Figure 3-1.
325.6610.16 - 22 -
3.2.2.5 Operating Modes
The following four modes of operation may be selected:
RUN - displays concentration data
SETUP - setup menu
ALARMS - active alarm/events queue
DATA - historical alarm/events queue
When the power is fi rst applied, the unit activates in the RUN mode. In this mode, the
display shows active gas concentration information. SETUP, ALARM, and DATA modes
can be selected by pressing the appropriate key on the front panel keypad. These keys
are used to “toggle” between the respective modes and RUN. Since the RUN mode has
no key associated with it, PRESSING THE RE SPEC TIVE MODE KEY AGAIN RETURNS
THE UNIT TO THE RUN MODE. For example, in order to return to RUN mode from any of
these operating modes, the user must press the current mode key again (i.e., if in SETUP
mode and the SETUP key is pressed, the operating mode returns to the RUN mode).
CAUTION
In SETUP, ALARMS, and DATA modes, gas-monitoring
continues to take place even though concentration values are
not shown on the display. However, when in SETUP, initiation
of CAL I BRA TION, SELF-TEST, or SENSOR CHECK functions
will temporarily suspend normal gas-monitoring.
3.2.2.6 Password
When the receiver initializes to the default parameters, password-protection is dis abled
and the operator must automatically enter the SETUP menu by pressing the SETUP key.
Password-protection may be enabled, if desired, by entering the SETUP mode and
selecting the CON FIG URE-INSTRUMENT-CHANGE PASSWORD menu item (Refer to
section 4.4). The user may then enter a numerical or alphanumerical pass word.
If password-protection is enabled, the user will be required to enter his pass word whenever
attempting to enter the SETUP mode.
Figure 3-1 Chloralert Plus Keypad
DEF1 32ABC
6MNOJKL 5GHI 4
WXY 9TUV 87PRS
QZ 0SETUP
DATA
ALARM
ENTER
LETTER
ACKONTROLSC
APITALC
- 23 - 325.6610.16
3.2.2.7 Display Modes
The receiver has a 2 line, 20 character per line LCD display with a character height of
0.19 in. (4.86 mm).
The display mode may be selected as either AUTO or MANUAL using the
CON FIG U RA TION menu in the SETUP mode. If an alarm occurs with the display in
either mode, the display will change to the 4-channel summary mode au to mat i cal ly.
The difference between the AUTO and MANUAL modes is described below:
MANUAL- Advance through the available channel display (if more than one
channel is active), including the 4-channel summary, by press ing the right or left
arrow keys.
AUTO- Automatically scrolls through the available channels, advancing to the next
channel every 3 seconds, but skips the 4-channel summery
Two types of data displays are possible in the RUN mode:
4-channel Summary
Single-channel Summary
When using the 4-channel summary display, each line is divided into two 10-character
group ings, one for each channel. This display mode is not available if the AUTO display
mode has been selected. Channel number, gas identifi cation and in stan ta neous gas
concentration in ppm are displayed si mul ta neous ly as shown below:
1 CL 1.23 2 O3 45.6
3 CL 738 4 NH 0.12
The single-channel display mode shows the same data for the selected channel in addition
to the channel’s 10-character TAGNAME, short-term exposure limit and either time-weighted
average (TWA) or custom gas con cen tra tions (depending on which has been selected). A
typical display is shown below:
CH1 TAGNAME 1.23
STEL: 4..56 TWA: 7.89
When in operation, the instrument selects the appropriate display mode using the following
guidelines:
Single-Channel Display a. If only one CHANNEL is active (refer to section 4.3.3.2)
b. If MANUAL mode is selected to show a single CHANNEL
c. During alarm if only one CHANNEL is active
4-Channel Summary a. If all CHANNELS are OFF
b. If MANUAL mode is selected to show the 4-CHANNEL
summary
c. During alarm if more than one channel is active.
If desired, the arrow keys may be used to select the
single-channel display mode to show in for ma tion for the
CHANNEL in active alarm. If in single-channel mode, the
display reverts to the 4-channel summary mode if a
second alarm occurs.
325.6610.16 - 24 -
3.2.2.8 Watchdog Timer Circuit
The “watchdog” circuit is intended to let the operator know that the microprocessor has stopped
running. The circuit requires a constant input pulse from the mi cro pro ces sor that only occurs
during proper operation. If the input pulses stop for more than a second, the watchdog circuit
will disable all of the relays and cause the display backlight to fl ash. In the event that this should
happen, restore normal operation by momentarily removing and re-applying AC power from
the unit thereby allowing the unit to cycle through its start-up procedure.
3.2.2.9 Self-Test
An optional self-test feature is available in the SETUP-CONFIGURE-INSTRUMENT-SELF TEST
menu item. This feature permits testing of the functional integrity of the receiver and some
of its electronics. This test causes the system to be checked for basic operation and proper
output. Once initiated, it operates automatically without further operator in ter ven tion (except
for the keypad test where user-action is required) as long as the appropriate data was entered
in the SET UP-CON FIG URE-IN STRU MENT-SELF TEST menu item.
The self-test sequence verifi es that the unit is operating properly and is divided into two
sections:
Standard - runs on all units
Extended - requires entry of the Confi guration Code (refer to section 3.2.2.9.2)
CAUTION
In SETUP, ALARMS, and DATA modes, gas-monitoring continues to
take place even though concentration values are not shown on the display.
However, when in SETUP, initiation of CAL I BRA TION, SELF-TEST or
SENSOR CHECK func tions will temporarily suspend normal gas-monitoring.
3.2.2.9.1 Standard Tests
The standard test sequence that is performed on all units is as follows:
SELF-TEST
DISPLAY
SELF-TEST
KEYPAD
SELF-TEST
NVRAM
SELF-TEST
RAM
SELF-TEST
DIGITAL OUTPUTS
The test runs automatically once initiated, however, user-action is required as the keypad
self-test is performed. The user is prompted to press the appropriate keypad buttons
in the sequence from upper left to lower right on the keypad. The display will indicate
which button is to be pressed. Once the keypad self-test is completed, the test will
resume automatic operation.
3.2.2.9.2 Extended Tests
In order for extended tests to be run on optional instrument confi gurations, a
CONFIGURATION CODE must be entered. The CONFIGURATION CODE indicates
the re ceiv er’s con fi g u ra tion. The CONFIGURATION CODE must be entered in the
SETUP-CONFIGURE-IN STRU MENT-ENTER CONFIG CODE menu item prior to
- 25 - 325.6610.16
initializing the self-test procedure. It is an 8-digit code, with each digit being either 1
or 0, depending on whether an option is present or not. The positions of the digits to
be entered correspond to the options below:
To enter the proper confi guration code, enter a “1” in the position corresponding to the
option if that option is present. (Be certain to enter only the digit “1”, any other entry
will be interpreted as a “0” by the system.) Enter a “0” if the option is not present.
For example, the CONFIGURATION CODE for a receiver with 4 analog outputs,
RS232 com mu ni ca tion, and external battery kit, and 1 sensor con nect ed to S1+ and
S1- terminals on the sensor interface TB3 (Refer to fi gure 2-3 or 2-4) is shown below:
ENTER CONFIG CODE
10111000
The last four entries in the CONFIGURATION CODE correspond to the sensor chan nels
in the in stru ment that have the ability to perform the optional SENSOR CHECK routine.
Entries in these positions are only required to run the sensor check (refer to section
3.2.2.10) and are not required for the SELF-TEST to function properly.
If the confi guration code that has been entered indicates that the appropriate option
is present, the extended self-test routine will be performed in the following sequence:
NOTE: Rx and Tx need to be connected for communications ports self test to work.
SELF-TEST
ANALOG OUTPUTS
SELF-TEST
OPTL DIGITAL OUTPUTS
SELF-TEST
COMMUNICATIONS PORTS
SELF-TEST
BATTERY
3.2.2.9.3 Self-test Failure Messages
Most tests simply exercise the hardware and do not detect an error, and therefore, do
not generate an error message. The messages for the tests that do detect failure are
given below. The test will stop at a failure and wait to the ENTER key to be pressed in
order to proceed with the re main ing tests.
The self-test may be run in two modes:
Single
Repeat
The SINGLE mode performs the SELF-TEST sequence only once, then returns the
unit to the RUN mode if no problems occurred.
4 ANO 6DORS232/RS485Comm
Ext.Battery
KitCH1 CH2 CH3 CH4
325.6610.16 - 26 -
The REPEAT mode continues to cycle through the SELF-TEST sequence until ter mi nat ed
by the operator. When in REPEAT mode, the DISPLAY and KEYPAD self-tests are only
per formed during the fi rst cycle and are skipped there af ter. In REPEAT mode, the
display in di cates the number of successful passes through the self-test cycle. If an
error occurs while in REPEAT mode, the self-test will stop and the display will fl ash and
indicate the nature of the error and the cycle-number during which the error occurred,
as shown below:
NVRAM FAILURE
PASS COUNT = 3
RAM FAILURE
PASS COUNT = 3
COMM PORT FAIL
PASS COUNT = 3
BATTERY FAILURE
PASS COUNT = 3
The operator may record the error and continue the REPEAT mode by pressing the
ENTER key. At the end of each cycle, the user is given the option to exit the REPEAT
mode by pressing the ENTER key. This capability is indicated on the display as shown
below:
PRESS ENTER TO STOP
PASS COUNT = 21
Normal sensor data-processing is interrupted when in the self-test mode, therefore it
is rec om mend ed that the use of the REPEAT mode be limited to isolating a suspected
problem area by testing it multiple times. Once the problem had been investigated or
confi rmed, press ENTER to exit the SELF-TEST REPEAT mode.
3.2.2.10 Sensor Check
The Chloralert Plus includes an optional SENSOR CHECK feature that may be used to verify the
integrity of the sensor and its associated electronics. This check may only be performed on
channels that have been confi gured with the optional sensor check gas generator (refer to Parts
Lists 325.7603). The channels on which the check will be run must be selected by making the
ap pro pri ate entry in the last four digits of the con fi g u ra tion code (refer to section 3.2.2.9.2).
NOTE
In order for the SENSOR CHECK to function properly, the sensor
CHANNEL must contain the optional SENSOR CHECK gas generator and the
channel entries in the CON FIG U RA TION CODE must correspond to the
channels on the sensor interface terminal block (TB3) to which the
sensors are wired. For example, if a single-sensor system has its
sensor wired to S3+ and S3- on TB2, then the “1” entry in the CONFIGURATION
CODE must be placed in the “CH3” position, otherwise an error will result.
The ten minute test consists of generating a test gas using the sensor check gas generator and
detecting the gas with the sensor. If the generated test-gas is detected within a certain concentration
range, the test is considered successful and the unit will automatically revert to the RUN mode. The
sensor check test is valid whenever the back ground concentration exceeds 0.5 ppm.
- 27 - 325.6610.16
CAUTION
Initiation of the sensor check feature will temporarily suspend
normal gas-monitoring.
The sensor check may be run in two modes:
Manual
Auto
MANUAL mode requires only that the proper CHANNEL(S) be selected as described above.
When the operator is ready to run the check, TEST NOW is selected from the SETUP-
CON FIG URE-IN STRU MENT-SENSOR CHECK-MANUAL menu and the checking begins
immediately.
Selecting AUTO from the SENSOR CHECK menu performs the check in a periodic manner.
This allows the SENSOR CHECK to run automatically to start at a pre-determined time and to
be performed at specifi c intervals. If AUTO operation is desired, entries must also be made for
the START and IN TER VAL parameters (refer to section 4.4.2.1.9 for parameter entry format).
Once all entries have been made, selecting ENABLE will activate the AUTO mode.
When in AUTO mode, a power failure occurring during SENSOR CHECK will cause it to be
ter mi nat ed. It will restart automatically after the power failure when the next “start time” is
reached. For example, if the unit is programmed to start SENSOR CHECK at 2 PM and a power
failure occurs at 2:01 PM, the next SENSOR CHECK will be performed the following day at 2
PM, as sum ing power has been restored.
Results of the SENSOR CHECK are logged in the event-queue for later retrieval. Typical
mes sag es that would appear during and after the SENSOR CHECK are shown below. These
messages would alternate with the displayed gas concentration data resulting from the gas
supplied by the SENSOR CHECK. Display of the SENSOR CHECK results lasts for fi ve minutes
after the SENSOR CHECK is complete:
1 SENSCHK 2 SC PASS
3 SC FAIL 4 CL 3.45
Where SENSCHK = Sensor Check in Progress
SC PASS = Sensor Passed Sensor Check
SC FAIL = Sensor Failed Sensor Check
In the event that a channel indicates a problem as a result of performing this test, refer to
section 7.0 for trou ble shoot ing or maintenance procedures. A sensor check failure will not
shut the unit down. Once the results of the sensor check have been cleared from the display,
normal operation will continue.
3.2.2.11 Calibration Mode
Before running the calibration procedure, the operator must confi gure the unit for calibration
using the CON FIG URE-CHANNELS-CALIBRATION menu selection by selecting the span,
con cen tra tion and zero for each channel in tend ed to be calibrated. The sequence that occurs
when RUN CALIBRATION is selected is shown in section 5.0. Calibration can be aborted at
any time by press ing the SETUP-STOP CALIBRATION function.
Calibration is conducted automatically by exposing the sensor to the calibration gas for up
to 5 minutes once the receiver has been placed in the RUN CALIBRATION mode (refer to
section 4.4). The receiver will evaluate the incoming signal and determine if its value and the
response times are in the proper ranges. The receiver then has the option to accept or reject
the cal i bra tion based on that comparison. This mode of calibration can be achieved even
when the sensor/transmitter is remotely located and only one person carries out the calibration.
The LED indicator located on the sensor/transmitter body will indicate whether a calibration
has been accepted or not. The operator will know im me di ate ly whether or not the calibration
325.6610.16 - 28 -
has been successful without having to return to the receiver. The receiver’s display will also
provide this information when the operator returns to the receiver once all sensors have been
calibrated. This method of calibration permits a single operator to carry out all the calibration
by setting the instrument to RUN CAL I BRA TION and exposing the sensor to the cal i bra tion
gas without opening the sensor/transmitter or having to make ad just ment at either the receiver
or the sensor/transmitter.
Calibration sources are connected to the sensor such that during calibration the gas feed to
the sensor is completely controlled. Calibration is aborted if:
A power failure results in loss of power to the sensor/transmitter
A level alarm occurs between selecting RUN CALIBRATION and activating the
sensor’s magnetic switch
The “watchdog timer” detects a microprocessor malfunction during calibration
Refer to section 5.0 for a detailed description of the calibration process.
3.2.2.12 Security and Safety
3.2.2.12.1 Password
The receiver may be confi gured so that entry of a password is required to gain
entry to the SETUP menu (refer to section 3.2.2.8). This may be desirable to
prevent accidental or malicious change of pro grammed in for ma tion.
3.2.2.12.2 Watchdog Timer
A processor “watchdog timer” monitors processor operation and determines if
a failure has occurred (refer to section 3.2.2.8). Processor malfunction during
calibration results in the calibration being aborted. Should this occur, the old
calibration data is retained while the display indicates information regarding the
nature of the problem.
3.2.2.12.3 Power Failure
A loss of power results in two modes of operation:
Units with battery backup - normal operation continues uninterrupted
Units without battery backup - the units will shut down and start up
automatically, without alarms, when power is restored
Units with battery backup will automatically switch to battery power in the event
of a main power failure and the unit will continue to operate in its normal mode.
3.2.2.13 Battery Operation
During normal AC powered RUN mode operation, the battery condition (if so equipped) is
checked every hour on the hour. The state of the battery may be seen by checking the SETUP-
CONFIGURE-INSTRUMENT-BATTERY STATUS menu selection.
Under certain conditions, the display backlight will be shut off to conserve power or signal a
faulty battery. These conditions are:
If an AC power failure is detected
If AC power is present but the battery is determined to be faulty
The battery will provide power for the unit for a minimum of 24 hours in the event of a power
failure. Refer to section 4.4.2.13 for more information on backup battery operation status.
3.2.2.14 Operational Alarms
Operational alarms may occur during the monitoring of the ambient air in the RUN mode. The
alarms au to mat i cal ly appear in a quadrant of the LCD display, the location depending on which
sensor channel caused the alarm condition.
- 29 - 325.6610.16
Each sensor CHANNEL has three alarms modules (ALARM1, ALARM2, AND ALARM3)
each of which may be pro grammed with a number of parameters (refer to section 4.4).
Entering the respective SETUP-CONFIGURE-CHANNELS-ALARM menu for each alarm
module allows the following alarm module parameter selections:
LEVEL
MODE
LATCH
DELAY
An alarm occurs when a sensed gas concentration rises above a pro grammed alarm level
threshold at time, t, as is shown graphically in Figure 3.2. Alarm time of occurrence, date,
and du ra tion are available in the event or historical queues by pressing either the ALARM
or DATA keys on the keypad.
Normal alarm operation is temporarily disabled during the POWER-UP WARMUP,
CALIBRATION (begins when the sensor’s magnetic switch is activated), SENSOR CHECK,
and SELF-TEST periods.
3.2.2.14.1 Level
The LEVEL entry allows entering the desired alarm activation threshold in ppm units. This
is shown graphically as “Alarm Level” in Figures 3-2 through 3-4. This numerical entry is
made using the numerical keys on the receiver’s keypad.
Three levels of alarms may be set corresponding to the ALARM1, ALARM2, AND ALARM3
“mod ules”. Typ i cal ly, ALARM1 would have the least degree of urgency while ALARM3
has the greatest so the con cen tra tion level values entered for the modules should adhere
to the fol low ing rule:
ALARM1 LEVEL < ALARM2 LEVEL < ALARM3 LEVEL
Figure 3-2 Basic Alarm Operation
Normally, the occurrence of a second alarm will not be displayed until the fi rst alarm has
been cleared. The ALARM1, ALARM2, AND ALARM3 modules are the only ex cep tion. If
an ALARM1 level alarm has occurred and the gas con cen tra tion continues to rise past the
ALARM2 level, the display will show ALARM2 Information. The same is true of ALARM3
operation.
ALARM LEVEL
GAS CONCENTRATION
TIME t
325.6610.16 - 30 -
3.2.2.14.2 Mode
There are four alarm concentration-calculation modes available to calculate the gas
concentration average:
INST - Instantaneous, generates alarm as soon as gas concentration
exceeds concentration alarm level.
STEL - Short Term Exposure Limit, 15 minute time weighted average of
measured gas concentration.
TWA - Time Weighted Average, 8 hour average of measured gas concentration
CUSTOM - Similar to TWA but allows a customer to provide his own time-base
to perform a customized time-weighted-average.
CAUTION
When power is restored after a power failure, displayed averages will be
reset and valid data will not be available until 15 minutes or 8 hours have been
accumulated for the STEL and TWA modes, respectively.
CAUTION
Averaging data will be accumulated from the time the RUN CALIBRATION
key is pressed until the calibration process is actually begun by activating
the sensor’s magnetic switch. Once cal i bra tion has been activated, data
accumulation is suspended until calibration is completed. Data ac cu mu la tion
is sus pend ed during SENSOR CHECK, CALIBRATION (begins when the
sensor’s magnetic switch is activated), and SELF-TEST.
*CALIBRATION is defi ned as beginning when the sensor's magnetic switch is activated.
CAUTION
If the measured gas concentration exceeds the maximum range,
the data will be ac cu mu lat ed at the maximum range rate. The average data after
the over-range event will be in error for the next averaging period. The over-range event
is displayed and may also be retrieved from the data archive. If the instrument
is set up such that alarm level 3 is at the max i mum range, remote notifi cation of
this type of occurrence is possible.
Should a power failure occur during the concentration averaging in the above modes,
the averaging period will be reset and the averaging will start over. When power is
restored, the displays will indicate zero concentration until updated. Displays are
updated every hour on the hour for TWA and CUSTOM modes and every minute for
STEL mode.
3.2.2.14.3 Latch
The selection made in this menu item determines whether a detected alarm condition is
“latched” or self-resetting. Two selections are possible
YES - Once an alarm condition occurs, the alarm status will be "latched” or non
self-resetting. The unit will hold the alarm state even if the gas con cen tra tion
goes back below the alarm threshold. The alarm in di ca tion may be cancelled,
after clearing, by pressing the ACK (ac knowl edge) key.
NO - Alarm status self-resets. When the alarm condition clears, normal
op er a tion will resume.
Self-Resetting Alarms: Figure 3.3 shows the behavior of a self-resetting (unlatched)
alarm. The gas concentration rises above the programmed alarm level at time t1. The
alarm activates and remains active until the average gas concentration falls below the alarm
threshold at time t2, at which time the alarm conduit deactivates automatically.
The display indicates current gas concentration level.
- 31 - 325.6610.16
Latched Alarms (non-self resetting):
Figure 3-4 shows the behavior of a latched alarm. Alarm op er a tion is similar to the self-
resetting alarm except that the alarm will remain active until the op er a tor acknowledges
the alarm by pressing the ACK key on the keypad, rep re sent ed by time t3 in Figure 3-4.
A latched alarm condition can only be successfully reset after the sensed gas con cen tra tion
has fallen below the alarm threshold, indicating by time t2 in Figure 3-4. Any attempt
to acknowledge the alarm before time t2 will be ignored by the instrument and the alarm
condition will remain active.
When the ACK key is pressed, the instrument polls all latched alarms. Those whose levels
have fallen below the alarm threshold are cleared while the other remains active. The alarms
are polled only once each time the ACK key is pressed.
Figure 3-4 Latching Alarm Operation
3.2.2.14.4 Delay
If desired, an alarm-delay time may be entered. The DELAY menu se lec tion enables
entering a value, in seconds, up to a maximum of 255 seconds. A delayed alarm will not
be signaled until the sensed gas concentration exceeds the threshold continuously for the
duration of the alarm-delay time.
Figure 3-3 Self-Resetting Alarm Operation
GAS CONCENTRATION
ALARM LEVEL
TIME t1 t2
ALARM DURATION
ALARM ENDS
GAS CONCENTRATION
TIME
ALARM LEVEL
ALARM DURATIONt1
t2
t3
ALARM CONDITION ENDS
"ACK" keyis pressed
325.6610.16 - 32 -
3.2.2.15 Event Displays
The basic RUN summary display indicates gas concentration information for all active chan nels
and
looks like this with four channels active:
1 CL 1.23 2 O3 45.6
3 CL 738. 4 NH 0.12
If any alarm or status even occurs on any channel, the indication for that channel will display a
fl ashing message. The following sections show these messages, compressed into the whole display
for convenience and clarity. The oc cur rence of any of the alarms or status events cause an entry to
be made into the “Event Queue”. The event queue is a history log of events that will be discussed in
more detail later.
3.2.2.15.1 Alarm Displays
Level alarms are caused by the sensed gas concentration exceeding the programmed
alarm level threshold (refer to section 3.2.2.14.1). The format for the level alarm display
is as follows:
INS 2 ALM
"ALARM" Indication
Alarm Module: 1,2 or 3
Alarm Mode: INST, STEL, TWA or CUSTOM
Alarm indication on the display would cause the alarm information to al ter nate with
normal RUN data on the display. Any of the following alarm in di ca tors may appear in a
quadrant of the dis play depending on how many sensor channels are active:
INS1ALM
INS2ALM
INS3ALM
STL1ALM
STL2ALM
STL3ALM
TWA1ALM
TWA2ALM
TWA3ALM
CUS1ALM
CUS2ALM
CUS3ALM
The basic concentration alarm displays are shown in the following sample display:
1 INS1ALM 2 STL3ALM
3 TWA2ALM 4 CUS1ALM
Where: CH1: INS1ALM - alarm module 1 INST - mode alarm
CH2: STL3ALM - alarm module 3 STEL - mode alarm
CH3: TWA2ALM - alarm module 2 TWA - mode alarm
CH4: CUS1ALM - alarm module 1 CUSTOM - mode alarm
3.2.2.15.2 Status Event Displays
Status events are additional event displays which alert the operator to the status and
results of tests and checks being performed by the system. They are also used to alert the
operator to any values entered during programming which may potentially cause problems
during system operation.
- 33 - 325.6610.16
The following status events or messages may appear during the SENSOR CHECK or
CAL I BRA TION routines:
SENSOR CHECK CALIBRATION
BAD ID IN CALIBRATION
BAD SNS IN SPAN CAL
BAD GEN IN ZERO CAL
BAD GEN SCHK PASS SPAN CAL
BAD ID SCHK PASS ZERO CAL
SENSCHK FAIL SPAN CAL
SC PASS FAIL ZERO CAL
SC FAIL CALIB STOPPED
Examples of status event displays are summarized below:
1 BAD ID 2 BAD SNS
3 BAD SNS 4 BAD GEN
Where: CH1: BAD ID - ID test failed
CH2 & 3: BAD SNS - sensor freq. input is out of limit
CH4: BAD GEN - SENSOR CHECK gas generator is faulty or depleted.
The three events above will stop normal operation until the condition that produced the
prob lem is found and corrected. The only exception is the BAD GEN condition which
may be cleared by pressing the ENTER key. The oc cur rence of any of the above
conditions is signaled by a fl ashing display.
1 IN CAL 2 BAD SNS
3 BAD SNS 4 BAD GEN
Where: CH1: IN CAL - calibration in progress
CH2: PASS ZR - zero calibration passed
CH3: FAIL SP - span calibration failed
CH4: normal RUN mode display
Refer to section 5.0 for information on the CALIBRATION procedure.
1 SENSCHK 2 SC PASS
3 SC FAIL 4 CL 3.45
Where: CH1: SENSCHK- sensor check in progress
CH2: SC PASS- sensor check passes
CH3: SC FAIL- sensor check failed
CH4: normal RUN mode display.
Refer to section 3.2.2.10 for information on the SENSOR CHECK procedure.
The display will show the status events for a period of time and then operation will
resume in the normal RUN mode.
3.2.2.15.3 Event Queues
Certain types of alarms or events are logged into the Active Alarms or Historical Alarms
da ta base, also called Event Queues. The databases may be accessed as follows:
Active Alarms - press the keypad’s ALARM button
Historical Alarms - press the keypad’s DATA button
325.6610.16 - 34 -
The illustrations on the next page show the basic operation of the Event Queues. The
Historical Events log is the history of Active Events that occurred previously. Some events
may be superceded by new information as operation enters different phases; i.e., “SENCHK”
may be replaced by “SC PASS”.
The maximum number of events stored in the Active and Historical Event queues is 40.
The queues are or ga nized purely by time and contain events from all channels.
The fi rst alarm shown is the most recent and pressing the left or right arrow keys on the
keypad will scroll backward or forward in the queue to enable the others to be seen.
EVENTBEGINS QUEUE
ACTIVE EVENT HISTORICAL EVENTQUEUE
EVENT ENDS
SELF-RESETTINGALARM BEGINS
ALARM ENDS
QUEUEACTIVE EVENT HISTORICAL EVENT
QUEUE
BEGINSLATCHED ALARM
ALARM CONDITION ENDS
ACTIVE EVENTQUEUE
HISTORICAL EVENTQUEUE
& KEY IS PRESSEDACK
Some messages appear in both active and historical event queues. The table below
shows logged events and where they appear:
Examples of Event Queue displays are shown on this page and the following pages:
Alarm Events
CH1 CL > 100 INS1 ALARMA (1 OF 12)
10:15 22 sec 220197
Where: CH1 = Channel number
CL > 100 = Alarm threshold
INS1 = Alarm Mode
10:15 = time of alarm
22 sec = Duration of alarm
220197 = Date of alarm
- 35 - 325.6610.16
Status Events
CH1 BAD SENSOR ID
10:15 22 sec 220197
POWER-UP
CH1 BAD GENERATOR
10:15 22 sec 220197
CH1 BAD SENSOR
10:15 22 sec 220197
OPERATION
CH1 OVER RANGE
10:15 22 sec 220197
CH1 IN CALIBRATION
10:15 22 sec 221097
CH1 IN ZERO CAL
10:15 22 sec 221097
CH1 IN SPAN CAL
10:15 22 sec 221097
CH1 PASS ZERO CAL
10:15 22 sec 221097 CALIBRATION
CH1 PASS SPAN CAL
10:15 22 sec 221097
CH1 FAIL ZERO CAL
10:15 22 sec 221097
CH1 FAIL SPAN CAL
10:15 22 sec 221097
CH1 CALIB STOPPED
10:15 22 sec 221097
CH1 IN SENSOR CHK
10:15 22 sec 221097
CH1 PASS SENS CHK
10:15 22 sec 221097
CH1 FAIL SENS CHK SENSOR CHECK
10:15 22 sec 221097
CH1 BAD GEN SCHK
10:15 22 sec 221097
CH1 BAD ID SCHK
10:15 22 sec 221097
325.6610.16 - 36 -
4.0 START-UP OPERATION
4.1 Firmware Level
The procedures and entries described in this instruction bulletin are based on the initial-release version of the Chloralert
Plus fi rmware. Other versions may not be identical and may have features different from those discussed in this instruction
bulletin.
4.2 Calibration Data
The Chloralert Plus Receiver and its associated sensor/transmitter function as a complete gas mon i tor ing system. The
receiver is given a serial number which is recorded on the receiver data tag shown below. Each system is calibrated at
the factory in accordance with customer specifi ed pa ram e ters. The calibration constants recorded at calibration are listed
on a tag attached to the sensor/transmitter assembly. A typical receiver tag is located on the receiver housing and the
calibration tag is located on the sensor/transmitter assembly.
Figure 4-1 Receiver Data Tag
The gas monitoring system is coarsely pre-calibrated and is generally ready for on-line service as received. However, a
true calibration by the customer is required before placing the unit in actual gas monitoring service. To place the Chloralert
Plus system in operation, proceed as outlined in section
4.3- Quick-Start.
Should it become necessary to replace the sensor/transmitter, refer to section 7.2.1 for the procedure. The calibration
constants for the new sensor must be entered in the receiver’s menu. Simply enter the noted operating parameters and
the system can be returned to service. Refer to section 7.0 - Main te nance for more information.
De Nora Water Technologies
110-240 Vac 50/60 Hz 35-60 Va
MODELSERIALSUPPLY
17CA3
MADE IN USA FROM US AND IMPORTED PARTS
!
Figure 4-2 Sensor Calibration Tag
Made in US from US and foreign components
TM
- 37 - 325.6610.16
4.3 Quick StartWhen power is fi rst applied to a new receiver, it will be initiated with no CHANNEL confi guration. Once CHANNEL
and SENSOR confi guration information has been entered using the SETUP menu (refer to section 4.3.3), the
instrument will pass through two phases:
40-second ID check
10-minute Warm-up
The start-up sequence is shown diagrammatically in Figure 4-3.
NOTE
If the instrument was purchased with sensors calibrated DO NOT RECONFIGURE,
the CALIBRATION WILL BE LOST
No CHANNEL Confi guration:
When the receiver is activated for the fi rst time, it will function according to the “default parameters” shown in
section 4.3.3.1. Since all SENSOR TYPE settings default to OFF, OFF will be indicated on the 4-channel summary
display until a channel is activated by selecting a sensor type
(refer to section 4.4.2.2.2).
NOTE
Be careful not to press the ENTER key twice when selecting the SENSOR TYPE since this will
cause alarms to activate if the unit contains the SENSOR CHECK option.
40-SECOND ID CHECK:
After a CHANNEL has been confi gured or if the receiver is powered-up with a confi gured CHANNEL, the channel
will enter the ID CHECK phase. This will last 40 seconds and de ter mine the type of sensor connected to the
CHANNEL.
If the check does not pass, the error BAD ID will fl ash on the display until the problem is remedied. THE CHANNEL
REMAINS INACTIVE until this problem is fi xed. When fi xed, the unit will require either that power be reapplied
or that the SENSOR TYPE be re-confi gured to OFF and then back to ON. Refer to section 7.0-MAINTENANCE for
trou ble shoot ing information.
If the sensor type has been confi gured with an optional gas generator, a BAD GEN message may be indicated
on the display, this is because the receiver had detected a signal from the sensor that says that its optional gas
gen er a tor needs service. The CHANNEL can still be used because this error will reset itself when the CHANNEL
leaves the WARMUP phase (10 minutes later).
10-MINUTE WARMUP:
After successfully getting through the ID CHECK phase, the CHANNEL enters the WARMUP phase. This is a ten-
minute time period where the sensor and its electronics stabilizes.
Once the unit has successfully completed the start-up phases, the unit enters the normal RUN mode. While the
SETUP menu may be accessed for confi guration during the ID CHECK and WARMUP phases, the user should
not try to run CALIBRATION or SENSOR CHECK since they will not run immediately. If initiated at this time, these
routines will remain “on hold” until the unit enters the normal RUN mode and then activate in an unplanned manner.
The START-UP phases are summarized in the diagram below:
4.3.1 Data Entry
INSTRUMENTPOWER-UP
OR CHANNEL
ID CHECKPHASE
WARMUPPHASE
RUNMODE
SECONDS LONG MINUTES LONG
CONFIGURATION
CONFIGURED
40 10
Figure 4-3 Start-up Phases
325.6610.16 - 38 -
The operator interface consists of the following activities:
Awareness of the level of gases being monitored.
The operator must know how to enter, navigate and exit the menus.
Entering information consists primarily of selecting an entry but numerical data
must be entered for certain menu parameters. Many of the setup parameters
have default values, based on those most com mon ly used in the industry, which
are entered at the factory. The setup time can be minimized if these values are
suit able for the application.
Running receiver routines for CALIBRATION, SENSOR-CHECK and SELF-TEST.
Each of these routine main te nance procedures suspends normal RUN-mode
operation until the routines are completed. Cal i bra tion mode and the specifi c
channel(s) to be calibrated are selected at time of calibration after the calibration
in for ma tion has been entered.
Retrieval of operating, calibration and set up data either on the display or via digital
communication.
The operator needs to be familiar with the error messages that appear on the
display both during set up and during normal operation and messages that
appear on the display during and after the calibration procedure.
Programming information is entered using the receiver’s alpha-numerical keypad shown in
Figure 4-4.
Figure 4-4 Receiver Data-Entry Keypad
4.3.2 Confi guration
The top menu consists of four main operating modes:
RUN- Displays operational information such as gas concentration and alarm
mes sag es
SETUP- Used to enter confi guration data
ALARM- Used to verify or poll status of any alarms and events
DATA- Used to access the operational information. Data is also available via serial
digital com mu ni ca tion.
SETUP, ALARM, and DATA modes can be selected by pressing the appropriate key on the
front panel keypad. These keys are used to “toggle” between the respective modes and RUN.
Since the RUN mode has no key associated with it, PRESSING THE RESPECTIVE KEY AGAIN
RETURNS THE UNIT TO THE RUN MODE. For example, in order to return to RUN mode
from any of these operating modes, the user must press the current mode key again (i.e., if in
SETUP mode and the SETUP key is pressed, the operating mode returns to the RUN mode.)
Confi guring the unit is done by entering the SETUP mode. This allows access to the
following menus:
CONFIGURE - Used to enter operating parameter
RUN CALIBRATION - begins calibration of the sensor(s)
STOP CALIBRATION - terminates sensor calibration
DEF1 32ABC
6MNOJKL 5GHI 4
WXY 9TUV 87PRS
QZ 0SETUP
DATA
ALARM
ENTER
LETTER
ACK
N TRT E
ONTROLSCAPITAL
SERVICES
C
S VE NRE
- 39 - 325.6610.16
When power is fi rst applied to the Chloralert Plus, it will activate in the RUN mode. The
front panel LCD display will indicate OFF on all four channel indicators. To make the unit
operational, a sensor channel must be activated by entering appropriate parameters. This is
done using the SETUP mode.
4.3.3 Setup
NO OPTIONS:
To activate a sensor channel and make the unit operational, the following entries
must be made to allow proper operation of the gas monitor:
Confi gure Instrument
Confi gure Channels
Confi gure Digital Outputs
WITH OPTIONS:
If analog output, additional digital outputs and communications options have been
specifi ed, the following additional entries must be made to allow proper operation of
the gas monitor:
Confi gure Analog Outputs (in the CHANNELS menu)
Confi gure additional digital outputs (in DIGITAL OUTPUTS menu)
Confi gure comm port (in COMM PORT menu)
4.3.3.1 Menu Navigation & Defaults
For a summary overview of the 17CA3000 menu structure, refer to section
4.4.
The main menu navigation buttons on the keypad are the right and left
ARROW buttons and the ENTER button. Their function is explained below:
LEFT ARROW BUTTON- Returns display to the previous level
in the menu (some times provides a “back space” function)
RIGHT ARROW BUTTON- Scrolls through selections within a menu
ENTER BUTTON- Used to enter a sub-menu or accept a menu
parameter entry
In menu locations where numerical entries are re quired, press the
appropriate number button to select that number.
Some menu areas allow the entry of alpha-numerical information. For
example, the NAME menu in the IN STRU MENT submenu. If the entry letter
is desired, a combination of alphanumeric and the LETTER buttons is used.
The unit automatically reverts to the numeric mode after each letter entry.
The entry sequence for entering a letter is as follows:
Press the LETTER button to indicate an alpha-entry is being
selected
Press the button that contains the letter-group containing the
desired letter.
Press either the 1, 2, or 3 button depending on the position
of the desired letter entry in the letter group on the button.
ENTER
LETTER
325.6610.16 - 40 -
For example, if it is desired to enter the letter “K”:
Press the LETTER button to indicate an alpha-entry is being
selected.
The letter group containing “K” is on the “5” button. Press the
“JKL 5” button
Since “K” is in the second position in the letter-group, press the
“2” button to select the letter “K”.
Repeat this procedure for the next letter.
DEFAULT CONFIGURATION: The Chloralert Plus is pre-confi gured at the
factory with certain default pa ram e ter values. If these pre-programmed settings
are acceptable for the ap pli ca tion, no further confi guration con cen tra tion must
be entered by the operator, the default values will not be suitable. If the user
required additional adjustments to the factory settings, the pro ce dures outlined
in section 4.3.3.2 through 4.3.3.7 must be used to change the in stru ment’s
confi guration.
The unit’s default parameters are shown in Table 4-1.
If entries other than the default parameters are selected by the op er a tor, the
operator may record these se lec tions in the “Customer Entry” column for future
ref er ence, if desired.
Table 4-1 Factory Default Database Parameters
MENU/SUB-MENU PARAMETER DEFAULTENTRY
CUSTOMERENTRY
INSTRUMENT ENGINEERING UNITSDISPLAY MODESENSOR CHECK MANUAL AUTO START TIME INTERVALSELF-TESTDEFAULT DATA BASECUSTOM AVERAGE HOURSCONFIGURATION CODE
PPMMANUAL
CANCELDISABLE
00:000
SINGLECANCEL
000000000
CHANNELS SENSOR TYPEALARMS - LEVEL MODE LATCH DELAYANALOG OUTPUT - OUTPUT SPAN ZERO MODECALIBRATION - CONCENTRATION SPAN ZERO
OFF100
INSTYES
00.01000
4-20 mA0
DRYDRY
DIGITALOUTPUTS
1 - SOURCE2 - SOURCE3 - SOURCE4 - SOURCE5 - SOURCE6 - SOURCE7 - SOURCE8 - SOURCE9 - SOURCEINVERT (FOR ALL DIGITAL OUTPUTS)STATE (FOR ALL DIGITAL OUTPUTS)
MALFUNCTIONCH1, A1CH1, A2CH2, A1CH2, A2CH3, A1CH3, A2CH4, A1CH4, A2
NOOFF
COMM.PORT
BAUD RATEINSTRUMENT ADDRESSPARITYDATALINK ENABLEDATALINK PROTOCOL
96000
EVENENABLED
STANDARD
- 41 - 325.6610.16
The following activities show a sample basic channel confi guration
procedure:
Press the SETUP key to enter SETUP mode
CONFIGURE appears on the display
Press ENTER to enter the CONFIGURATION menu
4.3.3.2 Select Sensor Chan nel
Use the RIGHT ARROW button to step to the CHANNELS
submenu. The stepping feature is a con tin u ous function. If the
desired entry is accidentally passed, continue stepping and the
selections will “wrap around” to the beginning of the menu.
When the desired CHANNELS submenu is displayed, press
ENTER to enter the channel selection menu.
Select the channel number to which the sensor is wired on the
receiver sensor interface terminal block TB3 (refer to Figure 2-3).
For example, if the sensor is con nect ed to terminals S1+ and S1-,
select CHANNEL 1
4.3.3.3 Select Sensor Type
Press ENTER to enter the channels setup menu.
Press the RIGHT ARROW button until SENSOR TYPE is displayed.
Press ENTER to enter the SENSOR TYPE menu.
Press the RIGHT ARROW button until the desired sensor type
(CL or SO) and its desired con cen tra tion range is displayed
(each sensor type has 3 ranges as so ci at ed with it).
Press ENTER to accept the sensor type and range selection.
4.3.3.4 Enter Sensor Calibration Parameters
The sensors presently supplied do not require that a distinct selection between
HUMID or DRY be made in the SPAN or ZERO menu selections, either selection
will work. Also, data for the K-values in the SEN SOR DATA menu is not required.
However, if no calibration is planned for the sensors, the OMIT selection in
SPAN and ZERO submenus must be selected. Refer to section 5.0 for more
information on calibration.
Use the RIGHT ARROW button to scroll or step to the
CHANNEL 1 calibration submenu.
Press ENTER to enter the CALIBRATION menu.
Press ENTER to enter the CONC (CONCENTRATION) parameter.
Using the numeric keypad buttons, enter the concentration of
the span calibration gas sample (the in stru ment will not accept a
value < 10% of range). It is not necessary to clear any previous
entry fi rst, the new information will overwrite and previous in for
ma tion. If an incorrect entry is made, the LEFT ARROW key may
be used as a “back space” key.
Press ENTER to accept the concentration entry.
Use the RIGHT ARROW button to scroll or step to the SPAN sub
menu.
Press ENTER to enter the SPAN menu.
Use the RIGHT ARROW button to step to the appropriate selection
for the calibration gas sample: either humid or dry calibration is to
be performed or omit if no calibration will be per formed.
Press ENTER to select the entry.
Use the RIGHT ARROW button to scroll or step to the ZERO sub
menu.
SETUP
325.6610.16 - 42 -
Press ENTER to enter the ZERO menu.
Use the RIGHT ARROW button to step to the appropriate selection
for the calibration gas sample: either humid or dry if cal i bra tion is to
be performed or omit if no calibration will be performed.
Press ENTER to select the entry
Use LEFT ARROW button twice to return to the CHANNEL 1
submenu.
4.3.3.5 Confi gure Alarm
Use the RIGHT ARROW button to scroll or step to the ALARM1 sub
menu.
Press ENTER to enter the ALARM1 menu.
Press ENTER to enter the LEVEL submenu.
Using the numeric keys on the keypad, enter the value of the gas con
centration threshold (in ppm) where the alarm is to occur. For example,
if it is desired to have an alarm occur at 100 ppm, enter 100 using the
keys on the keypad. If an incorrect entry is made, the LEFT ARROW
may be used as a ‘back space” key. The selected alarm level must be
within the sensor range se lect ed, otherwise the “over-range” alarm will
supercede the level alarm.
Press ENTER to accept the alarm level entry.
Use the RIGHT ARROW button to step to the desired MODE selection
(INST, STEL,TWA, or CUS TOM). This se lec tion de ter mines the time-
base criteria the unit uses to generate an alarm based on the value of
the entry in the LEVEL submenu. The alarm modes are defi ned as
follows:
INST- Instantaneous, generates alarm as soon as gas
concentration exceeds concentration alarm level.
STEL- Short term exposure limit, 15-minute time weighted
average of measured gas con cen tra tion
TWA- Time weighted average, 8 hour average of measured gas
concentration
CUSTOM- Allows customer to provide his own time-base to
perform a customized time weight ed average up to an average
over 24 hours.
Press ENTER to accept the alarm mode entry.
Use the RIGHT ARROW button to step to the LATCH submenu.
Press ENTER to enter the LATCH menu.
Use the RIGHT ARROW button to select either YES, or NO.
YES- Once an alarm condition occurs, the alarm status will be
“latched” or non self-resetting.
NO- Alarm status self-resets. When the alarm condition clears,
normal operation will resume.
Press ENTER to accept the desired alarm latch entry.
Use the RIGHT ARROW button to step to the DELAY submenu.
Press ENTER to enter the DELAY submenu.
Using the number keys, enter a value (in seconds) of how long the
receiver is to wait to signal an alarm situation has occurred, up to a
maximum of 255.
Press ENTER to accept the alarm delay entry.
Press LEFT ARROW three times to return to the CONFIGURE menu.
Follow the same procedure for confi guring the ALARM 2 and ALARM3
parameters. Remembering that:
ALARM1 LEVEL < ALARM2 LEVEL < ALARM3 LEVEL
- 43 - 325.6610.16
4.3.3.6 Confi gure Digital Output
Press the right arrow button to step to the digital outputs submenu.
Press enter to enter the digital outputs submenu.
Press the right arrow button to select the digital output desired, 1
through 9. The standard receiver is supplied with 3 digital output relays,
6 additional digital output relays are optional.
Press enter to accept the entry.
Press enter to enter the source menu.
Use the RIGHT ARROW button to step to the channel number and
alarm number source of the alarm signal. For example, if he
desired alarm source is channel 1, alarm 1, step to the
CH1-A1 selection.
Press ENTER to accept the alarm source entry.
Other parameters available in the DIGITAL OUTPUTS menu are shown
below:
INVERT- Allows the normally-open and normally-closed relay contact
states on receiver digital output terminal block TB2 (refer to Figure
2-3) to be in ter changed.
STATE- Provides selections of ON and OFF to enable and disable the
alarm, if desired.
4.3.3.7 Return to RUN Mode
Press the SETUP button to return the unit to the run mode and begin
operation.
4.4 Menu Sequence
The data entered for setup is available on the display by going through the setup menu and selecting
the parameter to be entered, then the value displayed after channel selection is made is that used
during the last calibration. That value will be lost once a new value is entered. However, regular print
outs, or storage in electronic fi les, via the digital output will provide a running log of such in for ma tion
and may be examined for reference, if necessary.
The following pages show the menu-tree for an overall view of receiver menu organization. Following the
menu tree is a detailed description of each menu function encountered when entering the setup menu.
325.6610.16 - 44 -
- 45 - 325.6610.16
4.4.1 Setup
The following chapter is a detailed description of the menu structure shown on page 47
of this chapter.
The 17CA3000 Chloralert Plus is normally in the RUN mode. Confi guration of the 17CA3000
multi-gas detector is accomplished by entering the SETUP menu. Pressing the SETUP key on
the unit’s keypad (refer to Figures 3-1 or 4-4) gives access to the unit’s programming pa ram e ters.
Section 4.3 offers a “quick start” procedure to get up and running in minimal time. The following
sec tions give a more detailed description and overview of each menu parameter.
4.4.1.1 Direct Access
If no password protection has been selected, pressing the SETUP key will give
direct access to the following menus:
CONFIGURE
RUN CALIBRATION
STOP CALIBRATION
4.4.1.2 Password Protected
If the unit has been confi gured with a password from the change password
submenu, the unit prompts for a password when the setup key is pressed.
ENTER
PASSWORD
The correct password must be entered in order to gain access to the three menus
listed above. There is no limit to the number of times an attempt may be made to enter
the password.
Once a unit has been password-protected, it is the responsibility of the operator to
remember the password. If the password is forgotten, the requirement for a
password may be overridden by a specifi c keystroke sequence during power-up.
ContactDe Nora Water Technologies cus tom er service to access this keystroke
sequence.
NOTE
Performing this password-override procedure should only
be used as a last resort. While the need for a password will be
eliminated, allowing access to pro gram ming parameters, the unit’s
database will be restored to the factory default values.
4.4.2 Confi gure
Allows confi guring the instrument with the desired customer parameters.
CONFIGURE
Pressing enter at the above menu gives access to the following menu parameters:
INSTRUMENT
CHANNELS
DIGITAL OUTPUTS
COMM PORT
4.4.2.1 Instrument
Pressing enter at the instrument menu will allow access to the following menus:
CONFIGURE
INSTRUMENT
NAME
ENGINEERING UNITS
DISPLAY MODE
325.6610.16 - 46 -
SET TIME
SET DATE
CHANGE PASSWORD
DEFAULT DATABASE
SET LCD CONTRAST
SENSOR CHECK
RUN SELF-TEST
ENTER CONFIGURATION CODE
CUSTOM AVERAGE HOURS
4.4.2.1.1 Name
Allows an entry of a unique identifying “name” to distinguish a unit from
other units, mainly for purposes of remote serial communication.
INSTRUMENT
NAME
Any alpha-numeric entry is allowed up to 10 characters long. Refer to
section 4.3.3.1 for the procedure for entering numerical as well as letter
characters.
4.4.2.1.2 Engineering Units
Selects how the sensed gas concentration is to be shown on the LCD
display. The available selections rep re sent English or Metric units.
INSTRUMENT
ENGINEERING UNITS
Available selections are:
ppm
mg/m3
Selection of the desired units determines only how the gas readings are
shown on the display and does not affect any other parameter or output.
Only the gas concentration in the selected units is shown on the display,
the units them selves are not indicated. If mg/cu. m is selected, the
concentration is calculated at 25°C. The rest of the in stru ment continues
to operate as a “ppm” device and no automatic conversions are performed.
The operator must perform the appropriate conversions for alarm and
calibration levels as well as ap pro pri ate sensor type selection manually if
mg/cu. m mode is selected. Equiv a lent ranges in the mg/cu. m mode will
no longer be “neat” numbers like 0-10 ppm, but will be modifi ed by the
appropriate English to metric con ver sion factor.
English (ppm) to metric (mg/cu. m) conversion factors for sensed gases
are as follows:
For example: Cl2 concentration in mg/cu.m = 2.9 x Cl2 con cen tra tion in
ppm
GAS FACTOR
Cl2 x 2.90
NH3 x 0.70
SO2 x 2.62
O3 x 1.96
- 47 - 325.6610.16
4.4.2.1.3 Display Mode
Determines how the sensor channels will be shown on the display.
INSTRUMENT
DISPLAY MODE
Available selections are:
MANUAL
AUTO
MANUAL MODE: If manual mode is selected, the display will default to
the 4 channel summary mode (refer to section 3.2.2.7). Data for a single
channel may be displayed by selecting the desired channel using the
right and left arrow keys:
Pressing either of these keys enables scrolling through and selecting
the active single-channel displays as well as the 4-channel display.
Selection of a channel will display the selected channel continuously
until a different channel is selected.
AUTO MODE: Automatically scrolls through the available channels,
advancing to the next channel every 3 seconds. In this mode only, the
single-channel displays are shown, the 4-channel summary display is
skipped.
Any selection will automatically revert to the 4-channel summary display
mode during an alarm condition.
4.4.2.1.4 Set Time
INSTRUMENT
SET TIME
Requires numerical entry of the present time in 24-hour clock mode. For
example 1 PM would be entered as 1300. This information is retained
after a power-loss and will not require re-entry.
ENTER TIME AS HHMM
HHMM
4.4.2.1.5 Set Date
INSTRUMENT
SET DATE
Requires numerical entry of the present date in day/month/year format.
ENTER DATE AS DDMMYY
DDMMYY
This information is retained after a power loss and will not require re-
entry. The unit has been designed for com pat i bil i ty with the year 2000
and will pose no problems when this changeover occurs.
325.6610.16 - 48 -
4.4.2.1.6 Change Password
INSTRUMENT
CHANGE PASSWORD
The Chloralert Plus is supplied with no password protection as the factory
default parameter.
This menu allows limiting access to programming and calibration
pa ram e ters by entering a password. Once a password has been entered,
the unit will prompt for a password when an attempt is made to enter the
setup menu. The password may be alpha-numeric and up to 10 char ac ters
in length.
Once a unit has been password protected, it is the responsibility of the
operator to remember the password. If the password is forgotten, the
requirement for a password may be overridden by a specifi c keystroke
sequence during power-up.
4.4.2.1.6.1 To override the password:
1. Turn off the power to the receiver
2. Depress the SETUP button while restoring power.
3. The confi gure code will need to be reset when access is
achieved.
NOTE
Performing this password-override procedure should only be used
as a last resort. While the need for a pass word will be eliminated,
allowing access to programming and calibration pa ram e ters, the
unit’s database will be restored to the factory default values.
4.4.2.1.7 Default Database
This menu allows the factory-default database parameters to be
restored and, if activate, will erase any cus tom er-programmed
parameters.
INSTRUMENT
DEFAULT DATABASE
Pressing the ENTER key will give the following options:
OK
CANCEL
Selecting ok will replace the existing programmed parameters with the
factory default values. Selecting cancel will abort the action and retain
the existing programming. Factory default values are shown in section
4.3.3.1.
The default parameters can also be restored by resetting the instrument.
To do so, remove power. Then press the SET ZERO key while restoring
power to the instrument.
4.4.2.1.8 Set LCD Contrast
Allows increasing or decreasing the contrast of the LCD display to
improve readability.
INSTRUMENT
SET LCD CONTRAST
- 49 - 325.6610.16
4.4.2.1.9 Sensor Check
INSTRUMENT
SENSOR CHECK
Performs a test of the system’s integrity including the sensor and checks for
proper operation. An optional gas-generator is required to perform this test and
must be attached to the end of the sensor housing. Available menu selections
are:
MANUAL
AUTO
Normal alarm operation is temporarily disabled during this test. Performing
the sensor check procedure is not intended to be a substitute for periodic
calibration.
MANUAL MODE:
Available selections in the manual mode:
CANCEL
TEST NOW
Selecting cancel will abort the sensor check procedure. Selecting test now
will begin the sensor check pro ce dure and the display should revert to the run
mode display automatically. The sensor check procedure basically con sists of
three phases:
1. Test-gas generation
2. Test-gas sensing
3. Display of results- pass/fail, bad sensor, bad generator.
Duration of the test is about 10 minutes.
AUTO MODE:
Available selections are:
ENABLE
START TIME
INTERVAL
AUTO
ENABLE
ENABLE confi gures the receiver to perform the sensor check procedure
automatically at the specifi ed time and at the specifi ed intervals.
The START TIME format is similar to the set time format and appears as follows:
ENTER TIME (HHMM)
HHMM
This menu requires numerical entry of the desired sensor check starting time in
24 hour clock mode. For example, 1 PM would be entered as 1300.
INTERVAL allows the automatic sensor check to be performed
periodically at pre-determined intervals by entering the time, in hours,
between periodic tests. The format is as follows:
ENTER INTERVAL (HRS)
HHH
where HHH represents the desired number of hours between sensor checks.
The unit will accept any value between 0 and 255. Selecting a value of 0 for this
parameter will disable the auto sensor check and has the same effect as se lect ing
disable in the auto mode, above.
325.6610.16 - 50 -
NOTE
If the auto sensor check has been enabled and it is
desired to change the start time or interval, the auto
sensor check must fi rst be disabled before entering the
new parameters. Reselect ENABLE when the new
values have been entered.
When in AUTO mode, a power failure occurring during SENSOR CHECK will
cause the SENSOR CHECK to be ter mi nat ed. It will restart au to mat i cal ly
to start SENSOR CHECK at 2 PM and a power failure occurs at 2:01 PM,
the next SENSOR CHECK will be performed the following day at
2 PM. Assuming power has been restored.
After a sensor check procedure completes, the test results are displayed
for 5 minutes. The unit then returns to the RUN mode regardless of the
result of the procedure. Test results are available by pressing the DATA
key and ex am in ing the event queues. It is the operator’s re spon si bil i ty to
determine the cause of a sensor failing this test and to remedy the con di tion
(refer to section 7.5).
4.4.2.1.10 Run Self-Test
INSTRUMENT
RUN SELF-TEST
The receiver’s self-test routine performs a series of diagnostics to de ter mine
if the gas-sensing system is operating properly. The self-test may be
performed as an “on-demand” single test or on a repeating basis. Menu
choices are
SINGLE
REPEAT
RUN SELF-TEST
SINGLE
The SINGLE mode performs the routine once and ends automatically.
Selecting repeat causes the test to repeat au to mat i cal ly at the end of each
cycle. The REPEAT mode only performs the display and keypad self-tests
on the fi rst cycle and skips them on subsequent cycles. The REPEAT
test mode may be stopped by pressing the ENTER key when prompted
by “PRESS ENTER TO STOP” at the end of each cycle.
The routine self-test sequence is as follows:
Display
Keypad
NVRAM
RAM
Standard Digital Outputs
The self-test may also perform additional “extended tests” if optional
hardware is present. The presence of these options is detected by
examining the confi guration code that has been entered (refer to sections
3.2.2.9.2 and 4.4.2.1.11 below). If the confi guration code in di cates the
presence of the options, the unit runs the additional extended test se quence
shown below:
Analog Outputs
Optional Digital Outputs
Communications Port
Battery
- 51 - 325.6610.16
For a more detailed discussion of the self-test, refer to section 3.2.2.9 of this
instruction bulletin.
WARNING
All alarm operation is temporarily totally disabled during this test.
4.4.2.1.11 Enter Confi guration Code
This menu requires the entry of the unit’s CONFIGURATION CODE. This code
represents the hardware confi guration of the customer’s unit and includes the
appropriate codes for any optional features. The proper entry of this code is
required for the self-test and sensor check to function properly.
ENTER CONFIG CODE
10111000
Refer to section 3.2.2.9.2 for more information on the composition and entry of the
confi guration code.
4.4.2.1.12 Custom Average Hours
This menu allows the entry of a custom averaging time (in hours) for the custom
time-weighted averaging gas-concentration calculation.
CUSTOM AVERAGE HOURS
HH
The value entered in this menu is the number of hours used to cal cu late the custom
time-weighted average gas concentration value in the SETUP-CONFIGURE-
CHANNELS-ALARM-MODE-CUSTOM menu. Values between 1 and 24 will enable
CUSTOM averaging and an indication of “CUS” will be shown on the single-channel
display. Entries up to 255 will be accepted by the fi rmware but will be treated as
if “24” was entered.
Entering a 0 (zero) in this menu will be accepted by the instrument. While this
would imply that a divide-by-zero condition will occur, the fi rmware treats the
entry differently from the 1 to 24 numerical entries. The unit detects a 0 entry and
essentially disables custom averaging, causing the unit to revert to TWA mode
and indicate “TWA” on the single-channel display.
4.4.2.1.13 Battery Status
If the unit is confi gured with the battery backup feature, it contains a
re charge able battery to provide standby power to the unit in case of a mains
power failure. This read-only menu item allows checking the condition
of the battery while it is on standby and will show that the battery is not
present if the option has not been installed.
INSTRUMENT
BATTERY STATUS
325.6610.16 - 52 -
Four possible status indications may occur:
ABSENT
BAD
CHARGING
FULLY CHARGED
BATTERY STATUS
FULLY CHARGED
Information for this status is updated at several times:
At power-up
When exiting SETUP
Hourly
In normal AC-powered operation, the battery is constantly under charge. Every
hour, on the hour, the unit performs a test of the battery, under load, to determine
its condition and then writes the result to the battery status display.
4.4.2.1.14 Software Version
INSTRUMENT
SOFTWARE VERSION
The SOFTWARE VERSION menu parameter provides a read-only display of the
revision level of the software controlling the Chloralert Plus. Refer to this menu
parameter if there is a need to contact Customer Service with a problem or question.
SOFTWARE VERSION
1.0
The information in this book is based on software version 1.0. Other versions
may not be identical and may have features different from those discussed in this
bulletin. Changes to the software can only be made by replacing the EPROM.
4.4.2.2 Channels
Sensor channel confi guration is done using the CONFIGURE-CHANNELS menu.
Confi guration menus are shown for channel 1 but confi guration data entry for each
sensor channel (1 through 4) is identical. Selecting the number of the channel to
be confi gured will give access to the menu parameters shown below.
CONFIGURE
CHANNELS
4.4.2.2.1 Tagname
CHANNEL 1
TAGNAME
Allows a unique identifi er to be assigned to the system to allow
dif fer en ti a tion between units in multiple-unit installations.
CH1.TAGNAME
NNNNNNNNNN
- 53 - 325.6610.16
Up to a maximum of 10 characters may be assigned to
represent the unit. This is most useful if the unit has the
optional datalink serial com mu ni ca tions capability,
allowing the unit to be remotely identifi ed over the datalink.
If entered, the tagname is shown on the top line of the dis-
play when the display is in single-channel mode (refer to
section 3.2.2.7).
4.4.2.2.2 Sensor Type
CHANNEL 1
SENSOR TYPE
This menu is a tabular menu that requires the se lec tion of the type of
sensor and its desired sensitivity range to the target gas. Available
selections are:
OFF
0-5 ppm Cl2
0-10 ppm Cl2
0-50 ppm Cl2
0-10 ppm SO2
0-20 ppm SO2
0-100 ppm SO2
CH1.SENSOR TYPE
CL 0-10 PPM
4.4.2.2.3 Alarm (1, 2 or 3)
Up to three Alarms may be con fi g ured per sensor channel. Refer to
Sec tion 3.2.2.14 for more detailed information on Alarm operation.
The con fi g u ra tion procedure for each Alarm is iden ti cal and selecting
either Alarm1, Alarm2 or Alarm3 will give access to the fol low ing menu
pa ram e ters.
4.4.2.2.3.1 Level
This menu is used to enter the desired sensed-gas
concentration level (in ppm) at which the alarm will be
activated. The value entered in this menu rep re sents the
gas concentration in ppm at which the unit will alarm,
regardless of whether mg/cu. units were selected in the
engineering units menu (refer to section 4.4.2.1.2).
WARNING
There is no automatic link between this menu entry and the units
selected in the engineering units menu refer to section 4.4.2.1.2)
or the range selected a level value entry that is within the
instrument’s operating range, otherwise the alarms
will not operate.
4.4.2.2.3.2 Mode
Lists the selections available for the alarm modes. The
mode determines how the unit re sponds to the sensed-gas
concentration and when the alarm will be generated.
Available selections are the fol low ing:
INST
STEL
TWA
CUSTOM
325.6610.16 - 54 -
Where: INST - "Instantaneous" alarm signaling
STEL - Short term exposure limit, a 15 minute time weighted
average of the senses con cen tra tion.
TWA - Time weighted average based on an average gas
concentration measured over 8 hours
CUSTOM - Allows a customized time weighted average to be used
where the time-base is the times value entered in the
setup-confi gure-in stru ment-custom average hours menu
entry (refer to section 4.4.2.1.12).
CH1.ALRM1.MODE
INST
4.4.2.2.3.3 Latch
Enables the selection of the type of alarm, self-resetting
(latched). Possible selections are:
YES
NO
CH1.ALRM1.LATCH
YES
Where: YES - Once an alarm condition occurs, the alarm status will be
"latched” or non self-resetting. The unit will hold the alarm
state, even if the average gas concentration goes back be-
low the alarm thresh old, until the ACK (ac knowl edge) key is
pressed.
NO - Alarm status self-resets. When the alarm condition clears,
normal operation will resume.
4.4.2.2.3.4 Delay
The DELAY menu selection enables entering a value
(in seconds) up to a maximum of 255 seconds. A
delayed alarm will not be signaled until the sensed gas
con cen tra tion exceeds the thresh old con tin u ous ly for the
du ra tion of the alarm-delay time.
CH1.ALRM1.DELAY
NNN
4.4.2.2.4 Analog Output
Each of the re ceiv er’s four sensor channels has an optional analog output
available. The analog output menu determines the char ac ter is tics of the
four analog outputs, if so equipped. The fol low ing fi ve se lec tions are
avail able:
Output
Span
Zero
Mode
Calibration
CH.ANALOG OUTPUT
OUTPUT
4.4.2.2.4.1 Output
CH1.ANAOUT.OUTPUT
NNNN
- 55 - 325.6610.16
This menu entry performs a dual-function:
CHANNEL OFF - A number may be entered which represents a
gas concentration value in ppm. Once the number
is entered, the analog output current will be forced
to the output current rep re sent ing the entered ppm
value.
Sensor Type - off position
Output function check
Select - 100% = 20 mA
Select - 50% = 12 mA
Select - 0% = 4 mA
This feature may be used to perform some basic
system troubleshooting (refer to section 7.0).
CHANNEL ON- Pressing the enter button during the output menu
selection takes an in stan ta neous “snapshot” of the
gas concentration value on the display and displays
it in the output display as a con cen tra tion value in
ppm. For example, if the unit is presently reading
a concentration of 25 ppm, when the enter key is
pressed, this value would be read and dis played in
the output parameter.
4.4.2.2.4.2 Span
Allows numerical entry of the desired gas
con cen tra tion value that causes the analog output
current to go to its maximum value (20 mA). It is
recommended that the span be set to the maximum
sensor range selected in the sensor type menu
(section 4.4.2.2.2).
CH1.ANAOUT.SPAN
SSS
Where “SSS” is a gas concentration value entered in
units of ppm.
CAUTION
The value of the gas concentration entered must be
within the range selected from the SENSOR TYPE menu (refer
to section 4.4.2.2.2), otherwise erroneous op er a tion will result.
4.4.2.2.4.3 Zero
Allows numerical entry of the desired gas
con cen tra tion value that causes the ANALOG
OUTPUT current to go to its minimum value (0 or 4
mA, depending on the MODE selection in section
4.4.2.2.4.4).
CH1.ANAOUT.ZERO
ZZZ
Where “ZZZ” is a gas concentration value entered in
units of PPM.
CAUTION
The value of the gas concentration entered must be
within the range selected from the SENSOR TYPE menu (refer
to section 4.4.2.2.2), otherwise erroneous op er a tion will result.
325.6610.16 - 56 -
4.4.2.2.4.4 Mode
This menu allows selection of the nature of the
analog output current. The possible selections are:
4-20 mA
0-20 mA
The minimum value represents the output current
that would be generated for the gas con cen tra tion
entered in the zero menu selection in section
4.4.2.2.4.3. The 20 mA output current would be
generated when the gas con cen tra tion is the value
entered in the span menu selection in section
4.4.2.2.4.2.
CH1.ANAOUT.MODE
4-10 mA
4.4.2.2.4.5 Calibration (Analog Output Parameters)
This menu allows the minimum and max i mum
analog output current to be calibrated for proper
accuracy. Refer to section 5.2 for detailed
calibration in for ma tion. Available selections are:
GAIN
OFFSET
CH1.ANO.CALIBRATION
OFFSET
OFFSET: The offset selection allows the low analog
output current to be adjusted of, for some reason,
the output current loses calibration. The existing
value is present and calibrated at the factory
and should require no ad just ment unless testing
determines that an inaccuracy exists.
CH1.ANO.CALIB.OFFSET
128
The range of numerical entry for this pa ram e ter is 0
to 255. The default is 128, indicating the midrange
of the adjustment capability. Refer to section 5.2 for
calibration information.
GAIN: Similar to the OFFSET adjustment, the
GAIN selection provides control over the accuracy
of the 20 mA high analog output current. The
existing value is preset and calibrated at the factory
and should require no adjustment unless testing
de ter mines that an in ac cu ra cy exists.
CH1.ANO.CALIB.GAIN
1.000
The format of the entry, while still numerical, is
different from the offset entry. Numbers may be
entered as whole numbers or as decimals. Refer to
section 5.2 for calibration information.
- 57 - 325.6610.16
Any changes made to the GAIN or OFFSET values
will take effect immediately upon pressing the
ENTER key but will not be stored in the database
until exiting the setup mode and returning to the
run mode.
4.4.2.2.5 Calibration (Sensor Parameters)
This menu establishes the parameters that are used when the RUN
CALIBRATION procedure is performed. Refer to section 5.0 for
calibration setup information.
CH1.CALIBRATION
CONC
Available selections are:
CONCENTRATION
SPAN
ZERO
SENSOR DATA
4.4.2.2.5.1 Concentration
The con cen tra tion of the gas being used for
cal i bra tion must be entered in this menu.
CH1.CAL.CONC
100
The entry is in numerical format and must be
entered in units of ppm. The value must conform to
the following con straints:
10% Range < or = Con cen tra tion < or = Range
4.4.2.2.5.2 Span
Selects the nature of the calibration gas to perform
a SPAN calibration.
CH.1.CAL.SPAN
HUMID
Available selections are:
HUMID
DRY
OMIT
For a detailed explanation of these parameters,
refer to section 4.3.3.4. A selection of OMIT
enables this test to be by passed.
4.4.2.2.5.3 Zero
Selects the nature of the calibration gas to perform
a zero calibration.
CH1.CAL.ZERO
HUMID
Available selections are:
HUMID
DRY
OMIT
325.6610.16 - 58 -
For a detailed explanation of these parameters,
refer to section 4.3.3.4. A selection of OMIT
enables this test to be by passed. If omit is
selected for zero, span should also be selected as
omit.
4.4.2.2.5.4 Sensor Data
Parameter entry for this menu is required only
if using a solid-state sensor. This menu may be
bypassed if an electrochemical sensor is being
used.
CH1.CAL.SENSOR DATA
K1
For the solid-state sensor, enter the nu mer i cal values
for the sensor’s fi ve “K-factors”, K1 through K5,
indicated on the sensor’s data tag (refer to fi gure
4.2). For additional information for the solid-state
sensor, refer to section 4.3.3.4.1.
4.4.2.3 Digital Outputs
CONFIGURE
DIGITAL OUTPUTS
The digital outputs are relays located on the main PCB assembly and each relay
may be assigned or confi gured to activate when a specifi c alarm condition occurs.
Con fi g u ra tion data entry for each digital output (DO) , 1 through 9, is identical.
Possible selections are as follows:
1
2
3
4
5
6
7
8
9
DIGITAL OUTPUTS
1
Digital outputs 1,2, and 3 are furnished as standard with the in stru ment. The other 6
are optional but will appear in this menu even if that option is not present. Selecting
the number of the digital output to be confi gured will give access to the menu
pa ram e ters shown below:
SOURCE
INVERT
STATE
DIGITAL OUTPUT 1
SOURCE
4.4.2.3.1 Source
DIGOUT1.SOURCE
MALFUNCTION
This parameter assigns a source of the alarm condition to the
selected digital output to activate. Available source selections are:
MALFUNCTION
OFF
CH1-A1
CH1-A2
CH1-A3
- 59 - 325.6610.16
CH2-A1
CH2-A2
CH2-A3
CH3-A1
CH3-A2
CH3-A3
CH4-A1
CH4-A2
CH4-A3
Where:
CHn = Channel number from the SETUP-CONFIGURE-CHANNELS
menu
An = Alarm number from the SETUP-CONFIGURE-CHANNELS-
ALARM menu
MALFUNCTION = either BAD_ID, BAD_SNS, BAD_GEN or BAD_K
NOTE
While there is no actual “power-failure alarm”, a digital
output may be dedicated to this task by confi guring its
source to “off” and its “invert” function
(refer to section 4.4.2.3.2) to “yes”.
4.4.2.3.2 Invert
This menu allows exchanging the characteristics of the digital
output relay contact. It allows contacts that are “normally open” to
be changed to “normally closed”. Possible se lec tions are:
YES
NO
For example, if normal operation of a normally-open relay is to
signal an alarm condition by closing its contacts, selecting YES in
this menu would cause the relay to be normally-closed and to open
its contacts in reaction to an alarm condition.
FAILSAFE MODE: YES should also be selected if “failsafe”
op er a tion is desired, meaning that in the event of a power failure,
the relays would fail to an alarm condition.
DIGOUT1.INVERT
NO
4.4.2.3.3 State
This selection enables the output state of a digital output relay to be
changed. Avail able selections are:
OFF
ON
This menu parameter may be used in two ways for diagnostic pur-
poses:
To test a DIGITAL OUTPUT Relay by forcing its state to either
off, or on.
To monitor the state of a DIGITAL OUTPUT during an alarm
condition.
In some cases it may be required to check if a DIGITAL OUTPUT
is functional. In order to control the state of a digital output for
diagnostic purposes, the DO’s SOURCE (refer to section 4.4.2.3.1)
must be elected as off. Oth er wise, any op er at ing alarms on that DO
channel will override the se lec tion of the state parameter and will
display the present status of the output on the STATE display.
325.6610.16 - 60 -
4.4.2.4 Comm Port
A digital serial communications DATALINK port is available as an option. Refer to section
6.0 Communication for more information.
COMM PORT
BAUD RATE
If this option is available, the following menu se lec tions are available and must be pro
grammed:
BAUD RATE
INSTRUMENT ADDRESS
PARITY
DATALINK ENABLE
DATALINK PROTOCOL
4.4.2.4.1 Baud Rate
baud rate
9600
This menu selects the speed of the serial communications port and should be
set to match the data transfer rate of the datalink. Available selections are:
110
300
600
1200
2400
4800
9600
19.2K
14.4K
28.8K
38.4K
4.4.2.4.2 Instrument Address
Allows identifi cation of the instrument by assigning a unique in stru ment
communications port iden ti fi ca tion code. This would be required in multiple-
instrument con fi g u ra tions where it would be necessary to dif fer en ti ate
between serial data from instruments.
COMM PORT
INSTRUMENT ADDRESS
Pressing the ENTER key will present the following display:
ENTER INSTR ADDR
NN
Where NN = a numerical entry between 0 and 31.
Up to a maximum of 32 instruments may be connected to a datalink for
information to and from a host. No two instruments may have the same
INSTRUMENT ADDRESS.
4.4.2.4.3 Parity
COMM PORT
PARITY
Selects the proper serial datalink information protocol for proper data
transfer. Available se lec tions are:
EVEN
NONE
PARITY
NONE
- 61 - 325.6610.16
Select EVEN if parity generation and checking for EVEN parity serial byte
protocol is required. If EVEN PARITY is not required, select NONE.
4.4.2.4.4 Datalink Enable
DATALINK ENABLE
ENABLED
The entry in this menu controls whether the instrument is
capable of datalink communications. Al low able selections
are:
ENABLE
DISABLE
It may be desirable, in some instances, to limit datalink
access to the in stru ment by disabling the capability of serial
communications. The ability to do this is provided by this
menu.
DATALINK ENABLE
ENABLED
4.4.2.4.5 Datalink Protocol
COMM PORT
DATALINK PROTOCOL
Determines the type of datalink protocol for correct
communication.
Choices are:
STANDARD
MODIFIED
STANDARD selects De Nora Water Technologies “byte-
stuffi ng”. MODIFIED disables datalink “byte-stuffi ng”.
DATALINK PROTOCOL
STANDARD
4.4.3 Run Calibration
Pressing ENTER at the SETUP-RUN CALIBRATION menu parameter enables the operator to begin
the CALIBRATION procedure described in section 5.0-Calibration.
RUN CALIBRATION
Pressing ENTER returns the display to the run mode and causes the unit to begin testing each
channel that is programmed to run the calibration test based on parameters entered in the SETUP-
CONFIGURE-CHANNELS-CALIBRATION menu. Two checks are made on each confi gured
channel:
Is calibration gas concentration < 1 ppm?
Is calibration gas concentration > Sensor range?
If the answer to either of these questions is yes, the following display will appear:
CALIBRAT'N SETUP ERR
HIT ENTER TO PROCEED
Upon pressing ENTER, the unit will return to the CONFIGURE menu where the calibration setup
parameters may be corrected by entering the CONFIGURE-CHANNELS-CALIBRATION menu.
Refer to section 5.0 for additional calibration information.
325.6610.16 - 62 -
4.4.4 Stop Calibration
This menu parameter terminates a CALIBRATION that is already in progress or terminates a one-
minute time-out after a calibration has been accepted or rejected.
STOP CALIBRATION
Terminating a CALIBRATION before being completed causes the device to use the values of
the most recent calibration that completed successfully. Terminating a time-out has no effect
on the calibration just completed, the completed CALIBRATION is perfectly valid.
- 63 - 325.6610.16
5.0 CALIBRATION
5.1 Sensor Calibration
5.1.1 Setup
Before a successful calibration run, the unit must be properly confi gured using the confi gure-
CHANNELS-CALIBRATION menu selection by selecting the CONCENTRATION, SPAN,
and ZERO for each channel intended to be cal i brat ed. Once properly confi gured, RUN
CALIBRATION may be initiated. The sequence that occurs when RUN CAL I BRA TION is
selected is described in section 5.1.3. Calibration may be aborted at any time by selecting
the SETUP-STOP CAL I BRA TION menu func tion.
5.1.2 Source
A variety of sources may be used for sensor calibration including:
Cylinder gas
Gas generators
Permeation devices
Gas generators are available from De Nora Water Technologies. Consult De Nora Water Technologies or your local representative for information on gas generators.
Low gas concentrations are not available for reactive gases, i.e. Cl2 and SO
2, therefore
sensors may be calibrated with air or nitrogen as the solvent.
The duration for which a controlled calibration gas concentration must be delivered to
the sensor is controlled by the electronics but as long as fi ve minutes may be required.
Gas is delivered to the sensor from the source using tubing with the following required
specifi cations:
Made from inert materials, Tefl on is preferred but polyurethane is acceptable
¼ inch outside diameter (O.D.)
1/8 to 3/16 inside diameter (I.D.)
For gas delivery to the sensor, the tubing is inserted into a ¼ inch hole in the “calibration
cup” which attaches to the sensor/transmitter assembly. Gas delivery rate should be
set in the range of 0.5 to 1.0 liters/minute. When cal i bra tion is done, the calibration
cup should be removed for normal gas-sensing operation.
NOTE: Chlorine sensors with the optional sensor check feature do not require the use of a
calibration cap assembly. Calibration gas should be delivered via the 1/4 inch hole located
on the side of the sensor assembly.
The procedure for ZERO CALIBRATION using zero air is identical to that above. ZERO
CALIBRATION may be conducted using ambient air only when the ambient air is known not
to contain any target gas, otherwise “zero air” must be used.
The following section describes the calibration process in detail.
5.1.3 Calibration
The following calibration procedure enables CALIBRATION to be performed by one person.
While a ZERO calibration may be performed independently of a SPAN cal i bra tion, a span
calibration should not be per formed without performing a zero calibration fi rst. The
temporary alarm “lockout” is enabled by the ZERO calibration procedure. If zero calibration
is not run fi rst, alarms will be generated during the SPAN cal i bra tion.
5.1.3.1 Calibration Sequence Overview
The following is for information only, for actual procedures, refer to sections
5.1.3.2 and 5.1.3.3.
CALIBRATION mode operation is controlled at the receiver by the keypad buttons.
The CALIBRATION mode is activated by selecting the SETUP-RUN CALIBRATION
menu parameter at the receiver. CAL I BRA TION may be aborted at any time by
selecting the SETUP-STOP CALIBRATION menu parameter.
RUN CALIBRATION
325.6610.16 - 64 -
When the ENTER key is pressed, the unit performs a check on all channels that
are programmed to run the ZERO and SPAN tests. Checks are performed to see if
the Calibration concentration is less than 1 ppm or exceeds the maximum range
for that channel. If either of these conditions is true, the following display will be
shown:
CALIBRAT'N SETUP ERR
HIT ENTER TO PROCEED
When the ENTER key is pressed, the unit will return to the confi gure mode.
If the concentration check passes, the LEDs on the sensors of all channels
programmed to run a calibration test will start to fl ash. The front panel display for
these channels would now show IN CAL alternating with RUN data. The display
shown below indicates that CHANNELS 1, 2 AND 4 have been programmed to run
a calibration test:
1 IN CAL 2 IN CAL
3 CL 0.27 4 IN CAL
Where: CH1: IN CAL alternates with RUN data
CH2: IN CAL alternates with RUN data
CH3: displays RUN data
CH4: IN CAL alternates with RUN data
Once the receiver has been placed in the CALIBRATION mode, the operator
activates the magnetic switch of any sensor/transmitter whose LED indicator is
fl ashing, indicating that the sensor is ready for CALIBRATION. When CALIBRA-
TION is complete, the LED indicator stops fl ashing and the display indicates the
results of the CALIBRATION.
Figure 5-1 - Label & Magnet Orientation
Made in US from US and foreign components
TM TM
Made in US from US and foreign components
- 65 - 325.6610.16
Each channel that was calibrated displays a PASS or FAIL indication alternating
with RUN data. Samples are shown below. These messages will dis ap pear after
one minute. The cal i bra tion data is updated only if the calibration passed. The
event is logged in the event queue only if the cal i bra tion passed or failed.
1 FAIL ZR 2 PASS ZR
3 FAIL SP 4 PASS SP
5.1.3.2 Zero Calibration Procedure
Activate the CALIBRATION mode by selecting the SETUP-RUN CALIBRATION
menu parameter at the receiver.
The LED on the sensor/transmitter assembly to be calibrated will begin fl ashing
(this LED is continuously lit during normal operation).
Expose the sensor to ZERO gas (refer to section 5.1.2) and immediately begin the
CALIBRATION process by placing the “magnetic wand” over the area indicated on
the sensor’s data label for about 5 seconds. Figure 5.1 shows a sample sensor data
label and the correct mag net ic wand orientation for proper CALIBRATION activation.
NOTE
During the ZERO calibration, there is no time limit
between the time RUN CALIBRATION is selected and the
time the sensor’s magnet is activated. Level alarms are
permitted until the sensor’s magnet is activated and
will abort the calibration if they occur.
If the magnet has activated the sensor calibration properly, the LED stops fl ashing
and remains continuously lit indicating that the calibration process has begun. The
receiver’s LCD display reads “IN ZERO” during ZERO calibration.
Once the unit has completed the ZERO CALIBRATION cycle (this may take as
long as fi ve minutes), the LED will signal whether the sensor has passed or failed
CALIBRATION:
PASSED - LED indicates 2 quick fl ashes every 2 seconds and unit is ready to
proceed to the SPAN CALIBRATION.
FAILED - LED will fl ash once every 2 seconds. The sensor did not meet the “pass
calibration” criteria.
If the calibration(s) performed passed, the unit will remain in the “IN CAL” mode for
15 minutes, awaiting the activation of the SPAN CALIBRATION (refer to section
5.1.3.3). If SPAN CALIBRATION is not started within that time, the receiver will
resume normal operation in the run mode.
NOTE
When the ZERO CALIBRATION is completed, the
unit will automatically prepare to run the SPAN
calibration. When the ZERO calibration ends, the operator has
15 minutes to activate the sensor’s magnet to begin the
SPAN CALIBRATION. If the magnet is not activated during this
period, the unit will revert to run mode and a "stop cal i bra tion”
entry will be made in the event queue.
NOTE
If ZERO CALIBRATION has failed, the display will indicate the
result for 5 minutes and a SPAN CALIBRATION cannot
be performed. If a SPAN CALIBRATION is attempted during
that time, the ac ti va tion of the sensor’s magnetic switch will be
ignored. The unit will au to mat i cal ly return to the RUN mode using
the data from the previous successful CAL I BRA TION.
325.6610.16 - 66 -
5.1.3.3 Span Calibration Procedure
NOTE
Level alarms are not disabled if a span-only calibration
is performed. Span calibration must only be performed together
with a zero calibration, otherwise level alarms may be activated
(refer to section 5.1.3)
Once the ZERO CALIBRATION has successfully completed, a SPAN cal i bra tion
may be performed.
Successful completion of the ZERO CALIBRATION is indicated by two quick
fl ashes of the sen sor LED every 2 seconds. To begin SPAN CAL I BRA TION,
follow the procedure below.
Expose the sensor to the SPAN calibration gas concentration (refer to section
5.1.2) and immediately begin the CALIBRATION process by placing the
“magnetic wand” over the area indicated on the sensor’s data label. Figure 5-1
shows a sample sensor data label and the correct magnetic wand oriented for
proper CALIBRATION activation. Maintain the fl ow of cal i bra tion gas until SPAN
CALIBRATION is completed. This may take up to 5 min utes.
If the magnet has activated the sensor CALIBRATION properly, the LED stops
fl ashing and remains con tin u ous ly lit indicating that the CALIBRATION process
has begun. The receiver’s LCD display reads “IN SPAN” during SPAN
calibration.
Once the unit has completed the CALIBRATION cycle (this may take as long as
fi ve minutes), the LED will signal whether the sensor has passed or failed CALI-
BRATION:
PASSED - LED indicates 2 quick fl ashes every 2 seconds.
FAILED - LED will fl ash once every 2 seconds. The sensor did not meet the
“pass calibration” criteria. A second attempt at calibration can only be made by
re-entering the calibration mode from the RUN CALIBRATION menu.
If the calibration(s) performed has passed, the unit will automatically terminate
the CALIBRATION sequence, save the new calibration data and resume normal
operation in the RUN mode.
An unsuccessful CALIBRATION will cause the unit to revert to the previous
CALIBRATION factors and a failed CALIBRATION entry will be made in the
CALIBRATION record queue
5.2 Analog Output CalibrationIf the instrument contains the optional analog output PCB assembly, the accuracy of the analog out
put (AO) is controlled by the AO GAIN and OFFSET values in the corresponding menu parameters.
The AO gain and offset values are stored in the database in nonvolatile RAM. This insures that the
values are not lost in the event of a power failure.
The AO is calibrated at the factory and should require no additional calibration. If, for some unfore
seen reason, the calibration is lost or the operator desires to check the calibration, the SETUP-CON-
FIGURE-CHANNELS-ANALOG OUTPUT-CALIBRATION menu parameter provides this capability.
Refer to section 4.4.2.2.4 for more information.
NOTE
Performing the analog output calibration will temporarily
interrupt alarms and collection of run-mode data.
- 67 - 325.6610.16
The basic AO calibration procedure is as follows:
Enter minimum output current in ANALOG OUTPUT-OUTPUT menu parameter.
Adjust value of ANALOG OUTPUT-CALIBRATION-OFFSET menu parameter until output
current matches value selected.
Enter maximum output current in ANALOG OUTPUT-OUTPUT menu parameter.
Adjust value of ANALOG OUTPUT-CALIBRATION-GAIN menu parameter until output current
matches value selected.
5.2.1 Minimum Output Current Calibration
a. Turn the sensor channel off by selecting off from the SETUP-CONFIGURE-
INSTRUMENT-CHANNELS-SENSOR TYPE menu parameter.
b. Enter the CHANNELS-ANALOG OUTPUT-OUTPUT menu parameter.
c. Enter a desired minimum output current level, for example, 1% would be a typical
minimum value. An entry of 0% is not possible due to the nature of the analog output.
d. Measure the analog output current using an accurate current monitoring device with,
preferably, a digital readout accurate to 2 decimal places.
e. If a value of 1% was entered in the OUTPUT menu parameter and the ANALOG
OUTPUT MODE selected is 0-20 mA, the desired output current should be:
% x (l max – l min) = l out
0.01 x (20 mA – 0 mA) = 0.20 mA
f. Adjust the value of the entry in the ANALOG OUTPUT-CALIBRATION-OFFSET menu
parameter until the current meter reads 0.20 mA.
5.2.2 Maximum Output Current Calibration
a. If not already OFF, turn the sensor channel off by selecting off from the SETUP-
CONFIGURE-INSTRUMENT-CHANNELS-SENSOR TYPE menu parameter.
b. Enter the CHANNELS-ANALOG OUTPUT-OUTPUT menu parameter.
c. Enter a desired maximum output current level, for example, 100% would be a typical
maximum value.
d. Measure the analog output current using an accurate current monitoring device with,
preferably, a digital readout accurate to 2 decimal places.
e. If a value of 100% was entered in the output menu parameter and the ANALOG OUT
PUTMODE selected is 0-20 mA, the desired output current should be:
1.0 x 20 mA = 20.00 mA
f. Adjust the value of the entry in the ANALOG OUTPUT-CALIBRATION-GAIN menu para-
meter until the current meter reads 20.00 mA.
After both minimum and maximum output currents have been checked or calibrated, activate
the sensor channel by selecting the appropriate sensor from the SETUP-CON FIG URE-
IN STRU MENT-CHANNELS-SENSOR TYPE menu parameter.
Exit the SETUP mode by pressing the SETUP key. The GAIN and OFFSET values are
au to mat i cal ly loaded into the analog output board for permanent storage when exiting the
SETUP mode.
325.6610.16 - 68 -
6.0 COMMUNICATIONS
6.1 General
Serial communication may be established between the 17CA3000 Chloralert Plus and a host
commu nications device. Possible serial communications host devices are Microsoft Windows NT-
based PCs running either of the following De Nora Water Technologies products:
53PW6000 Micro-PWCTM
53SU6000 Micro-DCITM Communication Services
Thirty-two addressable instruments (using instrument addresses 0-31) can be connected to a datalink
for information transfer to or from a host. All transactions are initiated by the host.
This section provides information to confi gure the communications interface. A description of the datalink
protocol message fi eld defi nitions, a summary table of the instrument memory address scheme, and
a mnemonic-datapoint cross reference table unit-tag atom transfers.
Information available via the optional digital communication protocols is shown below:
ALL SETUP parameters
Status parameters such as gas concentration and battery status
All of the above information may also be shown on the display. It is not possible to access the event
queues using the databank.
6.2 InterconnectionsSerial communication capability is optional and requires interconnecting wiring. In addition to the
diagrams below, refer to Figures 2-3 and 2-4 of this instruction bulletin. This information applies to
only those in stru ments with the optional RS-232 or RS-485 modules.
Figure 6-1 illustrates the optional RS-232 or RS-485 module used in the Chloralert Plus. The module
is installed in the appropriate location on the main PCB assembly (refer to Figure 2-3). The module is
socket mount ed and is secured to the circuit board assembly with a screw. Figure 6-1 also shows the
module and is secured to the circuit board assembly with a screw. Figure 6-1 also shows the module
signal plug, which is keyed to prevent inverted insertion in its socket. As shown in Figure 6-1 (e.g.,
insert screwdriver at base), the lug ad just ing screws are accessed at the bottom of the plug.
Figure 6-1 - RS232 or RS485 Datalink Module
INSERTSTRIPPEDWIRELEADSINTOLUGS
RS-232 OR RS-485 MODULE
MODULE MOUNTING SCREW
INSERT SCREWDRIVER AT BASE
- 69 - 325.6610.16
6.2.1 RS-232 Plug Connections
Signal connections to the RS-232 module plug are illustrated in Figure 6-2. Transmitted (TxD)
and received (RxD) signal direction is with respect to the Chloralert Plus.
6.2.2 RS-485 Plug Connections
Signal connections to the RS-485 module plug are illustrated in Figure 6-3. In the illustration, the
Chloralert Plus is shown wired as a “drop” or “node” (single instrument) on the datalink meaning
that additional in stru ments may also be connected. Two wires are therefore connected to each
lug: one set (T+, T-, R+, R=, SC) that comes from the previous node and another set that is con
nected to the next datalink node.
NOTE
Cable shield should be connected to ground at only one location.
Figure 6-2 - RS 232 Plug Connections
DATA GENERATEDBY CONTROLLER(RS-232 BA SIGNAL)
DATA RECEIVEDBY CONTROLLER(RS-232 BB SIGNAL)
COMMON RETURN(RS-232 AB SIGNAL)
N.C. TxD RxD N.C. COM
RS-232 PLUG
Figure 6-3 - RS 485 Plug Connections
RS-485 PLUG
T+ T- R+ R- SHD
= DATA GENERATEDBY CONTROLLER
= DATA RECEIVEDBY CONTROLLER
SHD = SHIELD
T+, T-
R+, R-
TO NEXTNODE
FROMPREVIOUSNODE
325.6610.16 - 70 -
6.3 Confi guring the System Module for Datalink
To initiate the instrument for datalink communications, respond to the system module prompts with
new values/selections if the default settings shown in Table 6-1 require changing.
6.4 Protocol
The datalink protocol requires the host to initiate all transactions. There are two basic categories for
all of the datalink message types: interrogate, which is used to read data from an addressed instru
ment, and change, which is used to alter a value in an addressed instrument. The addressed instru
ment decodes the mes sage and provides an appropriate response. The protocol message fi eld defi
nitions are provided in Table 6-2.
Table 6-1 System (SYS) Prompts (Datalink)
(conF Menu ----> SYS Module)
Prompt Description Default
iAInstrument AddressIt is the address assigned to this instrument on the datalink. Valid addresses are from 0 - 31. Notwo instruments can have the same address on the datalink.
0
bAUd
Baud RateThis value is set to match the data transfer rate of the datalink. Valid menu selections are 110 4800 300 9600 600 19.2K 1200 14.4K 2400 8.8K
9600
dLE
Datalink EnableSelections are as follows:enabled: Allows instrument datalink communication.disabled: The instrument is not permitted to communicate over the datalink.
enabled
dLP
Datalink ParitySelections are as follows:even: It indicates parity generation and checking for even parity serial byte protocol is enabled.none: It indicates no parity protocol.
even
dLS
Datalink ProtocolSelections are as follows:standard: Selections B - Seven Trent Services byte stuffing which inserts a NULL (00) byte after every SOH (7E hex) that is not the beginning of a message. This permits user-written communications software to determine the number of bytes to expect in a response message.modified: Disables datalink protocol.
standard
- 71 - 325.6610.16
6.4.1 Message Types
The types of messages that are sent from the host to the instruments on the datalink are
formatted as fol lows:
6.4.1.1 Host to Instrument
1. Interrogate- This message requests up to 20H consecutively stored bytes,
beginning at the specifi ed memory address location of the addressed
in stru ment.
01111110 EOH + I.A. NUM LO ADD HI ADD LRC
2. Change- This message sends up to 20H bytes of new data to the addressed
instrument. 01111110 AOH + I.A. NUM LO ADD HI ADD Data 1 XXXXXXXXX
Data N LRC
3. Change Bits- This message alters only the specifi ed bits in the specifi ed bytes in
the ad dressed in stru ment. (NUM = 2N)
01111110 COH + I.A. NUM LO ADD HI ADD Mask 1 State 1 XXXX Mask N
State N LRC
Table 6-2 Datalink Protocol
Symbol Description
SOH Start of Header
This character, 7E, denotes the beginning of a message.
I.A. Instrument Address
The address of the instrument responding to the transaction. It must be within a range of 00-
1F (00-31 decimal).
CMD Command
It is the operation to be performed or a description of the message that follows the Com-
mand-I.A. byte. the Command-I.A. byte has two fi elds: the Command fi eld (3 bits) and the
I. A. fi eld (5 bits). There are fi ve commands as follows: Interrogate, Change, Change Bits,
Acknowledge, and Response.
NUM Number
The number of data bytes transferred or requested. The NUM must be a range of 00-32
decimal.
LO-ADD Lower Address Bits
The least signifi cant 8 bits of a 16 bit instrument address.
HI-ADD Higher Address Bits
The most signifi cant 8 bits of a 16 bit instrument address.
DATA An 8 bit data byte.
XXXX Represents a variable number of data bytes.
MASK Has a 0 in every bit position that is selected to be forced to 1.
STATE Has a 1 in every bit position that is selected to be forced to 1.
LRC It is the sum of all bytes Modolo 256 of the message not including the SOH character or its
own bit settings (LRC). It is written at the end of the message to ensure data was not lost in
transmission.
325.6610.16 - 72 -
4. Acknowledge- This message signals the addressed instrument that its last
echoed change message was received correctly; the in stru ment performs the
change requested.
01111110 80H+ I.A.
6.4.1.2 Instrument to Host:
1. Response- This message furnishes the data requested by the in ter ro gate com-
mand of the host. It is also used to echo back the previous change message of
the host
01111110 20H + I.A. NUM LO ADD HI ADD Data 1 XXXXX Data N LRC
6.4.2 Transaction Examples
EXAMPLE A- The host requests 9 bytes of data beginning at hexadecimal memory address
1000H from the instrument at datalink address 03.
1. Host sends interrogate message.
01111110 11100011 00001001 000000000
SOH Cmd + I.A. NUM LO ADD
00010000 11111100
HI ADD LRC
2. Instrument sends response message.
01111110 00100011 00001001 00000000
SOH Cmd + I.A. NUM LO ADD
00010000 XXXXX XXXXX XXXXX YYYYYYYY
HI ADD Data 1………Data 9 LRC
EXAMPLE B- The host sends 2 bytes of new data, to be loaded into the instrument at dat
alink address 03 beginning at hexadecimal memory address 1000H.
1. Host sends change message.
01111110 10100011 00000010 00000000
SOH Cmd + I.A. NUM LO ADD
00010000 00001000 00001100 11001001
HI ADD Data 1 Data 2 LRC
2. Instrument sends Response message.
01111110 00100011 00000010 00000000
SOH Cmd + I.A. NUM LO ADD
00010000 00001000 00001100 01001001
HI ADD Data 1 Data 2 LRC
3. Host sends acknowledge message.
01111110 10000011
SOH Cmd + I.A.
4. The instrument performs the change requested at the end of the current scan.
6.5 Mnemonic-to-Datapoint Cross Reference Many of the mnemonic prompts are actually alphanumeric representations of datapoint pa ram e ters
that are used to confi gure instrument operation. There are six datapoint types which are briefl y de
scribed in Table 6-3. In the data format description of the table, subscripts H and D are used to de
note hexadecimal and decimal numbers respectively.
- 73 - 325.6610.16
6.5.1 Database Starting Addresses
Table 6-4 provides the starting address and the number of datapoints for each data type in
the 17CA3000 Chloralert Plus.
6.5.2 Instrument Memory Address Scheme
The location of the datapoint in the instrument memory can be calculated from the base
address for that datapoint type. The datapoint types, with their base addresses and memory
location al go rithms, are provided in Table 6-5 (subscripts H and D are used to denote hexa
decimal and decimal numbers re spec tive ly).
Refer to Figure 6-4 for fl oating point examples.
Table 6-5 Datapoint Address
Type BaseAddress Address Calculation
B 2000H
Address = B Base + (B Number) = 800H + (B Number)Address example: B012 location= 0800H + 12D = 800H + CH = 80CH
L 20C8H
Address = L Base + (L Number/8) = 84BH + (L Number/8)Remainder = bit position in byteAddress example: L014 location= 84BH + 14/8 = 84CH, bit 6 (remainder)
C 20DCH
Adress = C Base + (3 X C Number) = 85BH + (3 X C Number)Address example: C011 location85BH+ (3 X 11) + 85BH + 33D=85BG + 21H + 87CH.
H 2208H
Address = H Base + (5 X Number) = 9CFH + (5 X HNumber)Address example: H001 location9CFH + (5 X 1) = 9CFH + 5D= 9CFH + 5H = 9D4H
A 2348H
Address = A Base + (10 X Number) = 9EBH + (10 X Number)Address example: A015 location9E8H + (10 x 15) = 9E8H+ 150D+9E8H + 96H A7EH.
Table 6-4 Database Starting Addresses
Type Start Address Number of Elements Size of Element
B 2000H 200 1
L 20C8H 160 1/8
C 20DCH 100 3
H 2208H 20 5
A 2348H 32 10
Table 6-3 Datapoint Types
Data Point Size Data Format Description
B 1 byte It is a positive integer from 0 to 255.
L 1 bit A single binary bit with a logical value of 0 to 1.
C 3 bytes A fl oating point value that has a resolution of one part in 32,768 and a dynamic range of + 1038.
The fi rst two bytes represent a 2’s complement notation in fractional for (2-n) whose absolute
value is between 0.5 and 0.9999. The third byte is the power of 2 in 2’s complement notation.
(See Figure C-1 for examples)
H 5 bytes A fl oating point value that has a resolution of one part in 2 billion and a dynamic range of +
1038. The fi rst four bytes represent a 2’s complement notation in fractional form (2-n) whose
absolute value is between 0.5 and 0.9999. The fi fth byte is the power of 2 in 2’s complement
notation. (See Figure C-1 for examples.)
A 10 bytes A text string that is 10 characters maximum.
Address
325.6610.16 - 74 -
Two examples of C and H fl oating point value calculations
(Note: Calculator values are approximations of the instrument
values given in the fi rst line of each example)
Example 1;
Value as nearest C 1111.0000000000000000 45 70 0B
Calculator check (calculator numbers are rounded):
0100 0101 0111 0000 x 2OB or 0100 0101 0111 0000 x 211
(Sum of Exponents –1, -5, -7, -9, -10, -11) x 211
=.5 + .6425 + .0078125 + .001953125 + .0009765625 + .00048828125 x
2048
= 0.542480468 x 2048 = 1110.999998 = 1111
Value as nearest H 1111.0000000000000000 45 70 00 00 0B
Calculator check (calculator numbers are rounded):
0100 0101 0111 0000 0000 0000 0000 0000 0000 x 20B or
0100 0101 0111 0000 0000 0000 0000 0000 0000 x 211
(Sum of exponents -1,-5, -7. -9, -10, -11) x 211
=.5 + .03125 + .0078125 + 001953125 + .0009765625 + .00048828125 + .0
+
.0 + .0 + .0 + .0x2048 = 0.542480468 x 2048 = 1110.999998 = 1111
Example 2:
Value as nearest C 0.09999847412109375 66 66 FD
Calculator check (calculator numbers are rounded):
0110 0110 0110 0110 x 2FD or 0110 0110 0110 0110 x 2-3
(Sum of exponents -1, -2, -5, -6, -9, -10, -13, -14) x 2-3
= .5 + .25 + .03125 + 015625 + .001953125 + .0009765625 +
.0001220703125
+ .00006103515625 x 0.125 = 0.799987792. x .0.125 = 0.099998474 = 0.1
Value as nearest H 0.09999999997671694 66 66 66 66 FD
Calculator check (calculator numbers are rounded):
0110 0110 0110 0110 0110 0110 0110 0110 x 2FD or
0110 0110 0110 0110 0110 0110 0110 0110 x 2-3
(Sum of exponents -1, -2, -5, -6, -9, -10, -13, -14, -17, -18, -21, -22, -25, -26
-29, -30) x 2-3
Figure 6-4 Floating Point Examples
6.6 Executing Instrument Self Tests Using Datalink The procedure to execute the instrument self tests via the datalink can be found in section 7.5 of the
maintenance section of this instruction bulletin.
NOTE: Rx and Tx need to be connected for com mu ni ca tions ports self test to work.
20 sign bit
2-1 0.5
2-2 0.25
2-3 0.125
2-4 0.0625
2-5 0.03125
2-6 0.015625
2-7 0.0078125
2-8 0.00390625
2-9 0.001953125
2-10 0.0009765625
2-11 0.00048828125
2-12 0.000244140625
2-13 0.0001220703125
2-14 0.00006103515625
2-15 0.00003051757813
2-16 0.00001525878906
2-17 0.000007629394531
2-18 0.000003814697266
2-19 0.000001907348633
2-20 0.0000009636743164
2-21 0.0000004768371582
2-22 0.0000002384185791
2-23 0.0000001192092895
2-24 0.00000005960464477
2-25 0.00000002980232239
2-26 0.00000001490116119
- 75 - 325.6610.16
Table 6-6 Prompt-to-Datapoint Cross Reference
Module Display Atom Name Network Reference
System
INSTRUMENTS NAMEENGINEERING UNITSDISPLAY MODETIME- SS MM HHDATE- DD MM YYLOAD DATE- DD MM YYCHANGE PASSOWRDSENSOR CHECKMANUAL ENABLEAUTO ENABLESTART TIME(HH)START TIME (MM)ENTER INTERCAL(HRS)BATTERY STATUSRUN SELF TEST-HRUN SELF TEST -LENTER CONFIG CODECUSTOM AVERAGE HOURSBAUD RATEINSTRUMENT ADDRESSPARITYDATALINK ENABLEDATALINK PROTOCOL
TAGEU INDEX
BAUDIA
A1B11B10B4B5B6B7B8B9B100B101B102B103B104B105A29
L62L63B73B74B75B107B76B77A30B44B2B1L80L81L82
The items below are not menu accessible
SYS:RANGSYS:RANGSYS:RANGSYS:RANG
SYS: TAGSYS: TAGSYS: TAGSYS: TAGSYS: TAG
SYS:TEMPSYS:TEMPSYS:TEMPSYS:TEMP
SYS:TYPESYS:TYPESYS:TYPESYS:TYPE
SYS: FREQSYS: FREQSYS: FREQSYS: FREQ
RANG1RANG2RANG3RANG4
TAGTAG1TAG2TAG3TAG4
TEMP1TEMP2TEMP3TEMP4
TYPE1TYPE2TYPE3TYPE4
FREQ1FREQ2FREQ3FREQ4
A19A20A21A22
A01A02A03A04A05
C80C81C82C83
A15A16A17A18
C76C77C78C79
6.7 Database Prompt-to-Datapoint Cross Reference Table 6-6 is provided as a parameter prompt-to-datapoint cross reference.
CHANGE PASSWORD
325.6610.16 - 76 -
Table 6-6 Prompt-to-Datapoint Cross Reference (cont)
Module Display Atom Name Network Reference
Channel 1
CH1. TANGAMECH1. SENSOR TYPE
CH1. ALRM1. LEVELCH1. ALRM1. MODECH1. ALRM1. LATCHCH1. ALRM1. DELAY
CH1. ALRM2. LEVELCH1. ALRM2. MODECH1. ALRM2. LATCHCH1. ALRM2. DELAY
CH1. ALRM3. LEVELCH1. ALRM3. MODECH1. ALRM3. LATCHCH1. ALRM3. DELAY
CH1. ANAOUT. OUTPUTCH1. ANAOUT. SPANCH1. ANAOUT. ZEROCH1. ANAOUT. MODE
CH1. ANO. CALIB. GAINCH1. ANO. CALIB. OFFSET
CH1. CAL. CONCCH1. CAL. SPANCH1. CAL. ZEROCH1. CAL. SNSDAT. K1CH1. CAL. SNSDAT. K2CH1. CAL. SNSDAT. K3CH1. CAL. SNSDAT. K4CH1. CAL. SNSDAT. K5
PL1
PL2
PL3
SPANZEROBASE
A2B12
C40B32L72B48
C41B33L73B49
C42B34L74B50
B0B4B8L56
C12B60
C16B16B20C20C24C28C32C36
The items below are not menu accessible
CH1: CONCCH1: CONCCH1: CAL_MCH1: IRCH1: STELCH1: TWACH1: SYSFREQCH1: SYSTEMP
CH1: AL1. TRIPCH1: AL2. TRIPCH1: AL3. TRIP
CH1:PA
CH1: SKAOCH1: SKAO1CH1: SKAO2
CH1: ALRMCH1: STAT
CH1: EUCH1:GAS_TYPECH1: SENSOR_ RANGE
CONCCALBCALMIRSTELTWAFREQTEMP
PA1PA2PA3
PA
SKASKBSKC
ALRMSTAT
EUTYPERANG
C52C56C60C64C68C72C76C80
L08L09L10
L92
L96L97L98
L86L90
A0A15A19
- 77 - 325.6610.16
Table 6-6 Prompt-to-Datapoint Cross Reference (cont)
Module Display Atom Name Network Reference
Channel 2
CH2.TAGNAMECH2. SENSOR TYPE
CH2. ALRM1. LEVELCH2. ALRM1. MODECH2. ALRM1. LATCHCH2. ALRM1. DELAY
CH2 .ALRM2. LEVELCH2. ALRM2. MODECH2. ALRM2. LATCHCH2.ALRM2. DELAY
CH2 .ALRM3. LEVELCH2. ALRM3. MODECH2. ALRM3. LATCHCH2.ALRM3. DELAY
CH2 .ANAOUT. OUTPUTCH2 .ANAOUT. SPANCH2. ANAOUT. ZEROCH2. ANAOUT. MODE
CH2 .ANO. CALIB. GAINCH2.ANO. CALIB. OFFSET
CH2. CAL. CONCCH2. CAL. SPANCH2 .CAL. ZEROCH2 CAL. SNSDAT. K1CH2. CAL. SNSDAT. K2CH2. CAL. SNSDAT. K3CH2. CAL. SNSDAT. K4CH2. CAL. SNSDAT. K5
PL1
PL2
PL3
SPANZEROBASE
A3B13
C43B35L75B51
C44B36L76B51
C45B37L77B53
C1C5C9L57
C13B61
C17B17B21C21C25C29C33C37
The items below are not menu accessible
CH2: CONCCH2: CAL_BCH2: CAL_MCH2: IRCH2: STELCH2: TWACH2: SYSFREQCH2: SYSTEMP
CH2: AL1. TRIPCH2: AL2. TRIPCH2: AL3. TRIP
CH2:PA
CH2: SKAOCH2: SKAO1CH2: SKAO2
CH2: ALRMCH2: STAT
CH2: EUCH2:GAS_TYPECH2: SENSOR_ RANGE
CONCCALBCALMIRSTELTWAFREQTEMP
PA1PA2PA3
PA
SKASKBSKC
ALRMSTAT
EUTYPERANG
C53C57C61C65C69C73C77C81
L11L12L13
L93
L99L100L101
B87B91
A0A16A20
325.6610.16 - 78 -
Table 6-6 Prompt-to-Datapoint Cross Reference (cont)
Module Display Atom Name Network Reference
Channel 3
CH3. TANGAMECH3. SENSOR TYPE
CH3. ALRM1. LEVELCH3. ALRM1. MODECH3. ALRM1. LATCHCH3. ALRM1. DELAY
CH3. ALRM2. LEVELCH3. ALRM2. MODECH3. ALRM2. LATCHCH3. ALRM2. DELAY
CH3. ALRM3. LEVELCH3. ALRM3. MODECH3. ALRM3. LATCHCH3. ALRM3. DELAY
CH3. ANAOUT. OUTPUTCH3. ANAOUT. SPANCH3. ANAOUT. ZEROCH3. ANAOUT. MODE
CH3. ANO. CALIB. GAINCH3. ANO. CALIB. OFFSET
CH3. CAL. CONCCH3. CAL. SPANCH3. CAL. ZEROCH3. CAL. SNSDAT. K1CH3. CAL. SNSDAT. K2CH3. CAL. SNSDAT. K3CH3. CAL. SNSDAT. K4CH3. CAL. SNSDAT. K5
PL1
PL2
PL3
SPANZEROBASE
A4B14
C46B38L78B54
C47B39L79B55
C48B40L64B56
C2C6C10L58
C14B62
C18B18B21C22C26C30C34C38
The items below are not menu accessible
CH3: CONCCH3: CAL_BCH3: CAL_MCH3: IRCH3: STELCH3: TWACH3: SYSFREQCH3: SYSTEMP
CH3: AL1. TRIPCH3: AL2. TRIPCH3: AL3. TRIP
CH3:PA
CH3: SKAOCH3: SKAO1CH3: SKAO2
CH3: ALRMCH3: STAT
CH3: EUCH3:GAS_TYPECH3: SENSOR_ RANGE
CONCCALBCALMIRSTELTWAFREQTEMP
PA1PA2PA3
PA
SKASKBSKC
ALRMSTAT
EUTYPERANG
C54C58C62C66C70C74C78C82
L14L15L0
L94
L102L103L88
B88B92
A0A17A21
- 79 - 325.6610.16
Table 6-6 Prompt-to-Datapoint Cross Reference (cont)
Module Display Atom Name Network Reference
Channel 4
CH4. TANGAMECH4. SENSOR TYPE
CH4. ALRM1. LEVELCH4. ALRM1. MODECH4. ALRM1. LATCHCH4. ALRM1. DELAY
CH4. ALRM2. LEVELCH4. ALRM2. MODECH4. ALRM2. LATCHCH4. ALRM2. DELAY
CH4. ALRM3. LEVELCH4. ALRM3. MODECH4. ALRM3. LATCHCH4. ALRM3. DELAY
CH4. ANAOUT. OUTPUTCH4. ANAOUT. SPANCH4. ANAOUT. ZEROCH4. ANAOUT. MODE
CH4. ANO. CALIB. GAINCH4. ANO. CALIB. OFFSET
CH4. CAL. CONCCH4. CAL. SPANCH4. CAL. ZEROCH4. CAL. SNSDAT. K1CH4. CAL. SNSDAT. K2CH4. CAL. SNSDAT. K3CH4. CAL. SNSDAT. K4CH4. CAL. SNSDAT. K5
PL1
PL2
PL3
SPANZEROBASE
A5B15
C49B41L65B57
C50B42L66B58
C51B43L67B59
C3C7C11L59
C15B63
C19B19B22C23C27C31C35C39
The items below are not menu accessible
CH4: CONCCH4: CAL_BCH4: CAL_MCH4: IRCH4: STELCH4: TWACH4: SYSFREQCH4: SYSTEMP
CH4: AL1. TRIPCH4: AL2. TRIPCH4: AL3. TRIP
CH4:PA
CH4: SKAOCH4: SKAO1CH4: SKAO2
CH4: ALRMCH4: STAT
CH4: EUCH4:GAS_TYPECH4: SENSOR_ RANGE
C55C55C63C67C71C75C79C83
L1L2L3
L95
L89L90L91
B89B93
A0A18A22
325.6610.16 - 80 -
Table 6-6 Prompt-to-Datapoint Cross Reference (cont)
Module Display Atom Name Network Reference
D01 CH4: SENSOR_ RANGEDIGOUT1. INVERTDIGOUT1. STATE
OINVCCO
B64L40L24
D02 DIGOUT1. SOURCEDIGOUT1. INVERTDIGOUT1. STATE
OINVCCO
B65L41L25
D03 DIGOUT1. SOURCEDIGOUT1. INVERTDIGOUT1. STATE
OINVCCO
B66L42L26
D04 DIGOUT1. SOURCEDIGOUT1. INVERTDIGOUT1. STATE
OINVCCO
B67L43L27
D05 DIGOUT1. SOURCEDIGOUT1. INVERTDIGOUT1. STATE
OINVCCO
B68L44L28
D06 DIGOUT1. SOURCEDIGOUT1. INVERTDIGOUT1. STATE
OINVCCO
B69L45L29
D07 DIGOUT1. SOURCEDIGOUT1. INVERTDIGOUT1. STATE
OINVCCO
B70L46L30
D08 DIGOUT1. SOURCEDIGOUT1. INVERTDIGOUT1. STATE
OINVCCO
B71L47L31
D09 DIGOUT1. SOURCEDIGOUT1. INVERTDIGOUT1. STATE
OINVCCO
B72L48L32
The items below are not menu accessible
DIGOUT1DIGOUT2DIGOUT3DIGOUT4DIGOUT5DIGOUT6DIGOUT7DIGOUT8DIGOUT9
TAGTAGTAGTAGTAGTAGTAGTAGTAG
A06A07A08A09A10A11A12A13A14
- 81 - 325.6610.16
7.0 MAINTENANCE
7.1 GeneralThe Series 17CA3000 Chloralert Plus will require a minimum of service if operated with rea son able
care. Should a question arise concerning operation and/or service of the gas detector, contact the
nearest De Nora Water Technologies facility for technical assistance. Please note that the model
number and serial number should be in clud ed in all communications concerning this equipment.
The only routine maintenance that should be required is periodic calibration (refer to section 5.0). Make
certain that there are no obstructions to normal gas/air fl ow around the sensor housing.
Repair will be that expected of a normal state of the art electronics equipment for both receiver and
transmitter. Should the sensor happen to malfunction, it is not intended to be repaired. While cal i bra tion
is not normally con sid ered part of maintenance, it must be performed regularly to ensure proper
operation of the device.
7.2 Self TestIn addition to the normal self test that can be run from the SETUP-CONFIGURE-INSTRUMENT-RUN
SELF-TEST menu se lec tion, there is a self test procedure which may be accessed for maintenance
purposes.
This self test mode is initiated by confi guring the self test control code using the serial com mu ni ca tions
datalink (refer to section 6.0). No messages will appear on the LCD display during the running of this
test. Testing of analog and digital outputs will be based on the information read from the con fi g u ra tion
code (refer to section 3.2.2.9.2).
If failure is encountered during this test, the test will be terminated and a status code will be written
onto location B78 where it may be examined. System component failures will be indicated by the
following codes:
• 1 – NVRAM failure
• 2 – RAM failure
• 3 – COMM PORT failure
• 4 – BATTERY failure
For additional information, refer to section 6.0-Communications.
7.3 Sensor/Transmitter ReplacementUp to four gas sensor/transmitters may be connected to the Chloralert Plus, depending on the gas
mon i tor ing requirements. It is normal for the sensor to experience drift over time as a result of normal
operation. Ambient con di tions such as a dusty environment will cause this drift rate to in crease. If
the sensor loses sensitivity, the operator should fi rst check for any accumulation of dust on the sensor
membrane’s surface. Any visible dust should be removed by blowing air across, not onto, the sensor’s
face. Do not try to remove any dust by rubbing the sensor’s face.
CAUTION
If cleaning of the sensor housing is performed, do not clean the
sensor/transmitter housing with cleaners containing strong
mineral acids or organic solvents such as ketones, chlorinated hy dro car bons
or aromatics. Cleaning should only be performed
using soap and water.
The need for sensor replacement is indicated if the sensor’s sensitivity decreases to the point where it
can no longer be calibrated reliably using the ZERO and SPAN CALIBRATION functions (refer to section
5.1.3). Sensor life is expected to be in excess of one year.
Should replacement become necessary, remove the sensor from the transmitter by attaching the
calibration cup to the sensor housing and pulling the entire sensor assembly from the transmitter
assembly.
325.6610.16 - 82 -
CAUTION
Sensor removal must be done by pulling the sensor from the circuit
board without rotating or twisting the sensor. Ro ta tion will cause
serious damage to the sensor pins.
To install a new sensor, remove the shorting jumper from the back of the electrochemical sensor and
attach the calibration cup to the sensor housing. Carefully align the sensor pins with the sockets on
the sensor circuit board and press the sensor to seat the pins in the sockets. Misalignment will cause
bending of the sensor pins and will damage the sensor. The new sensor should engage fairly easily,
if excessive force seems to be required to insert the sensor, the sensor pins and their sockets are
probably misaligned.
7.4 TroubleshootingThe 17CA3000 Chloralert Plus gas detection system is a complex instrument and there are few
cus tom er-serviceable components inside. A serious malfunction will not be repairable by the customer.
Investigating problems with the device requires making the necessary repairs or mod i fi ca tions that will
restore the unit’s normal operation. Some basic checks and measurements may be made to possibly
determine the cause of a failure and help correct a problem.
7.4.1 General Troubleshooting
General problems with Chloralert Plus system operation may be diagnosed using relatively
simple techniques and measurements. Refer to the following general troubleshooting chart
for basic system checks and remedies.
WARNING
Electrical shock hazard. Equipment powered by AC line
voltage presents a potential electric shock hazard. Servicing
of the Chloralert Plus should only be attempted by a
qualifi ed electronics technician.
- 83 - 325.6610.16
TROUBLESHOOTING
PROBLEM CORRECTIVE ACTION
No power/lcd display Check for AC power at the reciver. If not present, check for AC power at TB1. If power exsits atTB1, check power fuses.
Keypad inactive Remove receiver and check that keypad ribbon cable is properly secured to PCB header.
Questionable operation Perform self-test procedure (refer to section 3.2.2.9 & 7.2)
Sensor- related events: Bad sensor id Bad sensor Bad k-value Fail sensor check Bad gen schk Bad id schk Over range
1. Check Sensor housing for presence of dust or other contaminants which may be blocking convective gas flow.2. Check interconnection wiring for loose or missing connections (refer to figures 2-3 through 2-6)3. Refer to sensor troubleshooting procedure in Section 7.4.2.4. Remove Sensor housing cover. Voltage between terminals 3 & 4 should measure between 12 and 15 VDC.5. If no voltage at Sensor, check corresponding terminals at Receiver Sensor Interface terminal block TB3.6. Check polarity of voltage at Sensor - Terminal 4 should be positive with respect to terminal 3.7. Measure voltage across gas generator within 40 seconds after starting the Sensor Check. It should not exceed 6 VDC. If greater than 6 VDC, replace gas generator.8. Replace Sensor
Calibration-Related Events: Fail Zero Cal Fail Span Cal
1. Check Sensor housing for presence of dust or other contaminants which may be blocking convective gas flow.2. Replace Sensor
Moisture in sensor housing Check for proper orientaion of sensor housing cover( refer to section 2.4)
7.4.2 Sensor Troubleshooting
If a BAD SNS (bad sensor) error message is generated, it may be due to be measured
fre quen cies that are outside of acceptable limits. The sensor’s output consists of two
frequencies representing sensed gas concentration and ambient temperature values (refer
to section 3.2.1.3). A BAD SNS message will occur when:
• The frequency representing gas concentration falls below 4500 Hz
• The frequency representing ambient temperature falls below 2330 Hz or is greater than
3700Hz.
Either of these conditions indicates that the sensor/transmitter board must be replaced.
If a “SC FAIL” message is generated when a SENSOR CHECK procedure is performed (refer
to section 3.2.2.10), the nature of the problem must be diagnosed.
SENSOR CHECK failure may be due to one of the following:
• Faulty sensor
• Faulty gas generator or connections (if so equipped)
• Faulty sensor electronics
If the failure occurred in AUTO SENSOR CHECK mode, perform a MANUAL SENSOR
CHECK to confi rm the problem. If the problem occurs during a MANUAL SENSOR CHECK,
perform the following procedure:
• Remove the cover from the sensor connection box housing.
• Measure the sensor’s power supply voltage between terminals 3 and 4 on the terminal
block. Ac cept able voltage is between 12 and 15 VDC. Check the polarity of the voltage,
terminal 4 should be positive with respect to terminal 3. If there is a problem with the
supply voltage, check the cor re spond ing terminal at the receiver sensor interface terminal
block TB3 and all in ter con nec tion wiring and terminals between sensor and receiver (refer to
Figures 2-3 through 2-6).
• If the sensor’s power supply is correct, perform a calibration procedure (refer to section
3.2.2.11).
receiver. exists
orientation
325.6610.16 - 84 -
If CAL I BRA TION is good, then the sensor and its electronics are ok and the problem may
be the optional gas generator (if so equipped).
• If the CALIBRATION failed, expose the sensor to a known gas concentration in the run
mode with the alarms disabled.
• If the measured gas concentration reads below about 50% of the expected value, check the
sensor housing openings for dust or other obstructions to gas fl ow. Check the sensor itself
for dust or obstructions.
• If dust is present, remove it by directing a gentle air stream close to and parallel to the
sensor face, do not blow directly onto the sensor face.
• Repeat the test with the known gas concentration.
• If the problem has not been cor rect ed, replace the sensor.
• Determination of a faulty gas generator can only be made if the sensor passes its
CALIBRATION procedure above.
• If the sensor passes calibration, check the gas generator wiring for continuity.
• Per form a SENSOR CHECK. Within 40 seconds after pressing ENTER To start the test,
measure the voltage across the gas generator, it should not exceed 6 VDC. If the wiring
is good and the measured voltage across the gas gen er a tor exceeds 6 VDC, the gas
generator must be replaced.
SEP 2015
Represented by:
Design improvements may be made without notice.
De Nora Water Technologies3000 Advance Lane Colmar, PA 18915 ph +1 215 997 4000 • fax +1 215 997 4062 web: www.denora.commail: [email protected]
®Registered Trademark. © 2015. All Rights Reserved.
