Wtw Ol Man Monitors Cond 170 296 All[1]

General Informations

76

Accuracy when going to pressThe use of advanced technology and the high quality standard of our instruments arethe result of continuous development. This may result in differences between thisoperating manual and your meter. We cannot guarantee that there are absolutely noerrors in this manual. We are sure you will understand that we cannot accept anylegal claims resulting from the data, figures or descriprtions. The informaiton in thismanual is subject to change without any notice.

Warranty

The designated meter is covered by a warranty of 2 years from the date of purchase.

The meter warranty extends to manufacturing faults that are determined within theperiod of warranty.

The warranty claim extends to restoring the meter to readiness for use but not,however, to any further claim for damages. Improper handling or unauthorizedopening of the meter invalidates any warranty claim.

To ascertain the warranty liability, return the meter and proof of purchase togetherwith the date of purchase freight paid or prepaid.

Copyright Weilheim 1999, WTW GmbH & Co. KGReprinting - even in the form of excerpts - is only allowed with the explicit writtenauthorization of WTW GmbH & Co. KG, Weilheim.Printed in Germany.

Safety Instructions

77

Please read these safety instructions carefully before installing theinstrument!

This instrument is built according to the safety rules for electronic measuringinstruments and left the factory in a safe and secure condition from a safetyengineering aspect (IEC 1010).The smooth functioning and operational safety of the equipment can only beguaranteed by following the general safety precautions applicable and the specialsafety instructions given in this operating manual. Before switching on the instrument, ensure that the operational voltage specified

for the instrument correspond to the power supply.(specification of the ranges of the voltage supply).

This instrument may only be operated using accessories that comply with the

specifications in the chapter "Technical Data" in this operating manual.The manufacturer accepts no liability for damage resulting from the use ofunsuitable accessories.

The trouble-free function and operational safety of the instrument can only be

guaranteed by following the climate conditions specified in the chapter "Technicaldata" in this operating manual.

Opening of the instrument as well as adjustment and maintenance or repair work

must only be performed by personnel authorized by WTW. Depending on theseverity, contravention can lead to loss of warranty.

If safe operation is no longer possible, the equipment must be taken out of service

and secured against inadvertent operation by labeling with warning signs. The safety of the user can be affected by the instrument if, for example, ! the instrument is visibly damaged, ! the instrument no longer operates as prescribed, ! the instrument has been stored under adverse conditions for a lengthy period

of time, ! the instrument was exposed to adverse transport conditions. Basically, if you are in any doubt, please return the instrument for repair ormaintenance to the manufacturer of the equipment,"Wissenschaftlich-Technische-Werksttten GmbH".

Contents

78

General informations ..............................................................................................76 Safety instructions ..................................................................................................77 Contents...................................................................................................................80 Description...............................................................................................................80

Front views ..........................................................................................................80 Control panel .......................................................................................................81

Display ...........................................................................................................81 Display messages ..........................................................................................82 Keyboard........................................................................................................84 Operating instructions ....................................................................................84

Operating levels...................................................................................................85 Installation ...............................................................................................................87

General instructions.............................................................................................87 Power supply .......................................................................................................87 REC 1 / REC 2 connections.................................................................................88 K1 / K2 (relay contacts) .......................................................................................89 RS 485 digital interface (RS option) ....................................................................89 Installation instructions for the LF 170 .................................................................90

Terminal assignment......................................................................................90 Connecting the sensors: TetraCon 700, TetraCon 600, TetraCon 300, LRD 01 .................................................................................92 Connecting WTW laboratory cells: e.g. TetraCon 325.................................93 Connecting the KI/S terminal box...................................................................94 Wiring of KI/S .................................................................................................95 Connecting the KI/S connection box to the LF 170 using The K 160 plug and EK/AG cable ..................................................................96

Installation instructions for the LF 296 .................................................................97 Terminal assignment......................................................................................97 Connecting the sensors: TetraCon 700, TetraCon 600, TetraCon 300, LRD 01 .................................................................................98 Connecting WTW laboratory cells: e.g. TetraCon 325.................................99 Connecting the KI/S terminal box.................................................................100 Wiring of KI/S ...............................................................................................101

Configuration.........................................................................................................102 Factory settings .................................................................................................102 Calling up the configuration level.......................................................................103

Overview table of the submenus..................................................................104 Selecting the sensor ..........................................................................................104 Selecting the measuring range ..........................................................................105 Selecting the REC 1 recorder output .................................................................105 Selecting the REC 2 recorder output (T option only) .........................................108

Contents

79

Relay 1 / Relay 2 (R option)...............................................................................109 Selecting the relay functions..............................................................................109

Limit indicator (UL.LL) ............................................................................110 Selecting the switching direction (opener / closer) for FrC, UL.LL ...............111

Parameterization....................................................................................................112 Factory settings .................................................................................................112 Calling up the parameterization level.................................................................113

Overview table of the submenus ..................................................................114 REC 1 and REC 2 recorder outputs...................................................................115 Relay 1 / Relay 2 (R option)...............................................................................116 Limit indicator (UL.LL)........................................................................................116

Setting the parameters for limit indicators ....................................................117 RS 485 interface (RS option) .............................................................................119 Setting up the code............................................................................................119 Temperature compensation ...............................................................................120 Reference temperature ......................................................................................121 Temperature function.........................................................................................122 Timer for an external probe cleaning unit (CS) ..................................................123

Setting the intervals......................................................................................124 Viewing mode ........................................................................................................125

Displaying the parameterization and configuration data....................................125 Displaying the calibration data and software version.........................................125

Measuring mode ....................................................................................................126 Calibration..............................................................................................................127

Check function / setting up the cell constant .....................................................127 Calibrating errors ...............................................................................................128

Checking mode......................................................................................................130 Calling up the checking mode............................................................................130 Displaying the code number ..............................................................................130 Recorder output 1 ..............................................................................................131 Recorder output 2 ..............................................................................................131 Relay test ...........................................................................................................132 RS 485...............................................................................................................132 Flowchart ...........................................................................................................133

Cleaning and maintenance ...................................................................................134 Troubleshooting ....................................................................................................135 Technical data........................................................................................................136

LF 170/LF 296....................................................................................................136 Appendix:

Appendix 1: Survey page Selection of the suitable measuring cell Appendix 2: Folded page Configuration Appendix 1: Folded page Parameterization

Description

80

Front views

LF 170

LF 296

Description

81

Control panel

Display

Conductivity measuring mode

Relay 1 is active

Salinity measuring mode

Automatic selection of measuring range active

Alphanumeric display: measured value, user interface

Linear temperature function ON/OFF

Dimensions: mS/cm, S/cm, 1/cm

Non-linear temperature function ON/OFF

Alarm display with LF-Check is defective

Reference temperatures 20 C or 25 C

Dimensions: C, %/K

IDENT no./RS 485 operation

Relay 2 is active

BAUD rate/RS 485 interface

Description

82

Display messages Note:The first letter of a display message is used for allocation.Configuration displays have a "C" as the first letter and a "P" identifies displays of theparameterization. Configuration:

CO COnfiguration CIn Configuration Input CFu Configuration Function Crn Configuration range Cr1 Configuration recorder 1 Cr2 Configuration recorder 2 Crc Configuration relay configuration CrF Configuration relay Function Parameterization:

PA PArameterization Pr1 Parameterization recorder 1 Pr2 Parameterization recorder 2 PL Parameterization Limits PIF Parameterization InterFace PCd Parameterization Code Pt Parameterization temperature Ptr Parameterization temperature reference PtF Parameterization temperature Function PCS Parameterization Cleaning System Viewing mode: So Software version

Description

83

General:

700 TetraCon 700 600 TetraCon 600 300 TetraCon 300 10 cell constant 10 cm-1 1 cell constant 1 cm-1 =1 cell constant 0.1 cm-1 =01 cell constant 0.01 cm-1 uar vAriable cell constant nLF non-Linear Function nF no Function PS Power Supply FrC Freeze Contact UL Upper Limit LL Lower Limit C Close O Open HS HySteresis td time delay Prn Printmode SL SLavemode Checking mode:

Cod CodenumbertstreC1 teSt rECorder 1tstreC2 teSt rECorder 2 tstreL teSt rELay tst485 teSt interface RS485 Interface RS 485 option:

See separate RS 485 operating manual for display messages

Description

84

Keyboard Operating keys to switch between Measurement (M) and Calibration (C)

Function keys to switch between the operating levels and changing of settingvalues in configuration and parameterization.

Operating instructionsThe user interface is partly implemented via a "compelled guidance", i.e. the usermust pass through all directly dependent menus. A Code enables access to thesubmenus, PA (Parameterization) and C0 (Configuration) (see section "Configuration"and "Parameterization").Select between C0 and PA using the keys

or

Change to the next submenu:

Select the required setting:or

Accept the setting:

Return to the program start:(except under compelled guidance)

or to the last submenu:

Return to the "Measure/Calibrate" function - if no compelledguidance is present:

ESCAPEto leave a menu

ENTERto confirm the input

UPto increase a value or to

scroll upwards in

scrolling mode

DOWNto decrease a value or to

scroll downwards in

scrolling mode

Description

85

Operating levelsThe instrument functions are incorporated in three consecutive levels with a clear andtransparent structure.This structure ensures that the user is provided with an instrument that, although ithas universal options, can still be set so that unauthorized actions do not interferewith the reliable measuring mode.Operating level:The configuration and parameterization can be interrogated in the operating levelwithout having to enter a code while the measuring mode continues to run. However,the settings cannot be changed. The Measure and Calibrate operating modes can beselected without any access restrictions.Parameterization level:The measuring ranges, limiting values, etc. are entered here. Access is protected bya code.Configuration level:The functions of the monitor are allocated in this level.The configuration is performed after the installation of the instrument, mainly on theinitial commissioning. Access is also protected by a code.

Description

86

Note:After a power fail, the instrument returns to the previous operating mode.All settings are preserved.

Installation

87

General instructions Instruments to be installed in the field (LF 170) must be equipped with a protective

cover (see WTW accessories). After installing the LF 170, close the cover to ensure compliance with the

IP66 standard. Inputs/outputs require no additional lightning protection.

The measures required for lightning protection are already incorporated in themonitor and any existing lightning protection measures can be used in addition.

The PG screws of the LF 170 are designed for cable diameters of 10 to14 mm.Unused cable feed-throughs (PG screws) are equipped with a sealing plug toensure compliance with the IP66 standard.

Power supplyOnly allow qualified electricians to perform the installation as itinvolves a line voltage that could endanger life.A bipolar disconnection option between instrument and mains isprovided (e.g. a fuse)!

Depending on the version, the instruments are designed for 230 VAC, 115 VAC,24 VAC or 24 VDC. The line voltage is printed on the nameplate. Always check thatthe correct line voltage is applied before commissioning the instrument.

An incorrect line voltage can result in damage to theinstrument!

In instruments with a 24 VDC module, observe the following: Only operate instruments with a voltage source that fulfills the requirements for SELV(Safety Extra Low Voltage with enhanced insulation against dangerous voltages) inaccordance with EN 60950.Without an interface, the requirements should fulfill EN 61010-1.

All instruments of the "170/296" series are constructed in accordance with safetyclass II, i.e. no protective earth conductor is required.

Do not feed the protective earth conductor into the instrument orconnect it to an instrument terminal or to a supply line!Only authorized WTW technicians are allowed to change theinstrument fuse.

Installation

88

REC 1 / REC 2 connections The REC 1 () and REC 2 (temperature) current outputs can be configured asfollows: 0 to 20 mA 4 to 20 mAIf terminals with a common earth are used, ensure the exact polarity of the directionof the current flow (+ / ). It involves active current sources that require no externalcurrent source!

Do not use an external current source as this can lead tomalfunction of the current outputs!

Maximum load of 600 Ohm.

K1 / K2 (relay contacts)The K1 and K2 relay contacts are designed as potential-free closers (make contacts).These contacts can also be configured as openers (break contacts) via theconfiguration level. The assignment of the relay to the corresponding functions isundertaken by the software configuration.

Note:The contacts are designed for max. 250 VAC / 5A with, however, a maximumof 150 W.

Installation

89

RS 485 digital interface (RS option)The RS 485 interface operates with differential levels that are not susceptible tointerference. In this way, cable lengths of up to 1000 m long can be implemented. Theinstruments are connected via a 2-wire line. A twisted 3-wire line is recommended forgreater lengths or a larger number of instruments; the third line is used as a referencepotential (GND), to compensate for any possible differences in potential that mayoccur.

Terminate every bus with a resistor using the software (see Parameterizing).The last device on the bus must provide the terminating resistor, i.e. inparameterization menu item PIF, the last device must have the terminationconnected additionally within the bus connection (tr = Termination) anddisconnected (notr = no Termination) in all other devices.If only one device is used, this is also effectively the last device and the terminatingresistor must be connected (tr).All other technical data as well as operating instructions are given in RS 485Operating Manual.

USA and Canada:Use the MCB 17x conduit box for the power supply and relay/alarmcontacts. Follow the installation instructions.

Installation

90

Installation instructions for the LF 170

Terminal assignment

Installation

91

Terminal Terminal assignment X1 X2 1 A (RS 485 option) REC 1 + 2 B (RS 485 option) REC 1 3 GND (RS 485 option) REC 2 + 4 REC 2 5 a (sensor) 6 K1 (R option) b (sensor) 7 K1 (R option) c (sensor) 8 K2 (R option) d (sensor) 9 K2 (R option) e (sensor) 10 N (mains) f (sensor) 11 L1 (mains) g (sensor) 12 h (sensor) 13 i (sensor)

Unused wires must not jut into the housing. Otherwise,malfunctions can occur. This especially applies to the ground wireof the mains cable. Cut off unused wires in the housing as close to the armored threadjoint as possible.

Note:For power supplies above 24 VDC, use the following wiring:L1 + 24 VN GND

Installation

92

Connecting the sensors: TetraCon 700, TetraCon 600,TetraCon 300, LRD 01

TetraCon 700

1413

1)99

S/c

C

Installation

93

Connecting WTW laboratory cells: e.g. TetraCon 325

TetraCon 325

ADA/AMPH-LAB-LF

1413

1)99

S/c

C

Installation

94

Connecting the KI/S terminal box

Strip terminal Colour of wires

1 yellow 2 gray 3 pink 4 Shield 5 brown 6 green 7 white

1413

1)99

S/c

C

K 160

TetraCon 700

KI/S

EK/AG or EK 170

7-contact + screen

max. cable length 100 m *

When longer cables are used,the measuring accuracy is reducedin the "low conductivity ranges(see chapter "Technical data").

"

*Note:

Installation

95

Wiring of KI/S


Note:After conncection of the 8-wire EK 170 cable 2 wires remain unused, from the 7-wireEK/AG cable 1 wire remains unused.The unused wire should be fixed in position or pinched off.



Installation

96

Connecting the KI/S connection box to the LF 170 using the K 160plug and EK/AG cable

The sensor cable can be extended to a max. length of 100 m cable. To do this, connect the K 160 plug of the EK/AG cable to the KI/S connection box.

Slide the screw-type cable gland , washer, seal

and

sleeve onto the cable .

Solder the plug to the cable . Wiring side of the instrument plug:

Latch the strain relief into the plug andscrew the cable clamp to the strain relief .The cable clamp must lie on the cablesheath to relieve the strands.

Screw the plug to the sleeve .Pay attention to the vertical alignment of thesleeve !

Screw the rubber seal to the cable andscrew the washer into the sleeve .

gn

1

6

5

47

3

2

bn

ws

Shield

ge

ga

rs

Installation

97

Installation instructions for the LF 296Terminal assignment

Terminal Terminal assignmentX1 X2

1 A (RS 485) REC 1 +2 B (RS 485) REC 1 3 GND (RS 485) REC 2 +4 REC 2 5 a (sensor)6 Relay 1 b (sensor)7 Relay 1 c (sensor)8 Relay 2 d (sensor)9 Relay 2 e (sensor)10 N (mains) f (sensor)11 L1 (mains) g (sensor)12 h (sensor)13 i (sensor)

Unused wires must not jut into the housing. Otherwise,malfunctions can occur. This especially applies to the ground wireof the mains cable. Cut off unused wires in the housing as close tothe armored thread joint as possible.

Note:For power supplies above 24 VDC, use the following wiring:L1 + 24 VN GND

AB

GND

RS 485

digital

interface

Contact-

outputs

Recorder

output

Sensor

Power

supply

Relay 1

Relay 2

N -

L1 +

AC DC

Installation

98

Connecting the sensors: Tetracon 700, TetraCon 600,TetraCon 300, LRD 01


1 A (RS 485) REC 1 +2 B (RS 485) REC 1 3 GND (RS 485) REC 2 +4 REC 2 5 green6 Relay 1 yellow7 Relay 1 gray8 Relay 2 pink9 Relay 2 white10 N (mains) black11 L1 (mains) brown12 13

Unused wires must not jut into thehousing. Otherwise, malfunctions canoccur. This especially applies to theground wire of the mains cable. Cut off unused wires in the housing asclose to the armored thread joint aspossible.

TetraCon 700

1

11

2

10

3

9

4

8

5

7

66 7

5

8

4

9

3

10

2

11

1

1213

X2X1

ADA/AMPH-LF

Installation

99

Connecting WTW laboratory cells: e.g. TetraCon 325


1 A (RS 485) REC 1 +2 B (RS 485) REC 1 3 GND (RS 485) REC 2 +4 REC 2 5 green6 Relay 1 yellow7 Relay 1 gray8 Relay 2 pink9 Relay 2 white10 N (mains) black11 L1 (mains) brown12 13

Unused wires must not jut into thehousing. Otherwise, malfunctions canoccur. This especially applies to theground wire of the mains cable. Cut off unused wires in the housing asclose to the armored thread joint aspossible.

1

11

2

10

3

9

4

8

5

7

66 7

5

8

4

9

3

10

2

11

1

1213

X2X1

ADA/LAB-LF

Installation

100

Connecting the KI/S terminal box


1 A (RS 485) REC 1 +2 B (RS 485) REC 1 3 GND (RS 485) REC 2 +4 REC 2 5 green6 Relay 1 yellow7 Relay 1 gray8 Relay 2 pink9 Relay 2 white10 N (mains) Shield11 L1 (mains) brown12 13



pink

max. cablelength 100 m*

Cable EK/AG or EK 170

When longer cables are used,the measuring accuracy is reducedin the "low" conductivity ranges(see chapter "Technical data").

whitebluegreen

browngray +shieldyellow

*

Installation

101

Wiring of KI/S


Note:After conncection of the 8-wire EK 170 cable 2 wires remain unused, from the 7-wireEK/AG cable 1 wire remains unused.The unused wire should be fixed in position or pinched off.



Configuration

102

The configuration defines the operating mode of the instrument. To do this, theconfiguration level is split into submenus (see the flow chart in the appendix).The submenus only offer those setting options that have not yet beenestablished on the basis of the previous program configuration.

Access to the configuration level can be protected via a code.

Perform the configuration with the instrument in a ready-to-operatecondition, i.e.: with the monitor connected to the supply voltage and themeasuring probe connected.

Factory settingsAdjustable function Setting Menu itemProbe TetraCon 700 CINConfiguration function CFuFinal value of measuring range AutoRange CrnMeasuring range of recorder output 1 0 ... 199.9 mS/cm CR1Temperature range of recorder output 21) 0 ... 50 C CR2Relay function2) nF REL1

(no function for rel. 1)nF REL2(no function for rel. 2)

CRc

1) only in the T option

2) only in the Relay option

Configuration

103

Calling up the configuration level

Press the DOWN key. Press the ENTER key.

The display shows the following:The first numeral flashes.

No code number is set in the delivery state.To access the configuration level press the ENTER key 3 times.If a code number was already set in an earlierparameterization, proceed as follows: Set the first numeral using the UP / DOWN

keys. Press ENTER to confirm the input. Set the other two numerals in the same way.

The following display appears: Use the UP / DOWN keys to change between

PA and C0 (configuration). To go to the configuration level, select CO.

Press the ENTER key to confirm the input.

If an incorrect code is entered or the ESCAPE key pressed, access tothe configuration is made in the viewing mode.Note:Settings can be inspected but not changed.

Configuration

104

Overview table of the submenus

Display Description OptionBasic

instrumentRelay T Option

CIn Select probe +

CFu Select operating mode +

Crn Select final value of measuringrange

+

CR1 Select Recorder 1 +

CR2 Select Recorder 2 +Assignment of the pilot relay +

+ Menu appears in the corresponding model of the instrument.See the flow chart in the appendix.

Selecting the sensorThe following sensors can be connected: TetraCon 700, TetraCon 600 and TetraCon 300 Cells with the constants: 0.01; 0.1; 1; 10 WTW laboratory cells with variable adjustment of the cell constantRefer to survey page appendix 1 Selection of the suitable measuring cell

Press the UP / DOWN keys to select a sensor. Press the ENTER key to confirm the selection.

Example:TetraCon 700

Press the UP / DOWN keys to select theoperating modes or Sal.

Press the ENTER key to confirm it.

Configuration

105

Selecting the measuring range

In the Crn submenu, the following setting options can beselected:

Auto 1.999 S/cm 19.99 S/cm 199.9 S/cm 1999 S/cm 19.99 mS/cm 199.9 mS/cm 1000 mS/cm

In the Crn menu, the following measuring ranges can be selected depending onthe sensor type:

Measuring range Sensor type Fast cell constant Variablecell

constant*700 600 300 10 1 =1 =01 uAr

Auto + + + + + + + +0 ... 1.999 S/cm + +0 ... 19.99 S/cm + + +0 ... 199.9 S/cm + + + + + + +0 ... 1999 S/cm + + + + + +0 ... 19.99 mS/cm + + + + +0 ... 199.9 mS/cm + + + + + +0 ... 1000 mS/cm + +

* Adjustable from 0.09 cm-1 ... 1.5 cm-1

Select the measuring range by pressingthe UP / DOWN keys.

Press the ENTER key to confirm it.

Configuration

106

Selecting the REC 1 recorder outputThe display shows:

If the recorder range is exceeded (OFL), the recorderoutputs issue a constant signal of 20.5 mA.An automatic return to the preset recorder range is performed aftereliminating the exceeding of the recorder range.

Admissible recorder ranges depending on the measuring range:Measuring range REC

rangemin.MBA

min. range max. MBE D/span(settingsteps)

0 ... 1.999 S/cm fast 0 S/cm 1.999 S/cm0 ... 19.99 S/cm variable 0 S/cm of 2 S/cm,

can be freely shifted inthe measuring range

19.99 S/cm 1 S/cm

0 ... 199.9 S/cm variable 0 S/cm of 20 S/cm,can be freely shifted inthe measuring range

199.9 S/cm 10 S/cm

0 ... 1999 S/cm variable 0 S/cm of 500 S/cm,can be freely shifted inthe measuring range

1999 S/cm 100 S/cm

0 ... 19.99 mS/cm variable 0 mS/cm of 5 mS/cm,can be freely shifted inthe measuring range

19.99 mS/cm 1 mS/cm

0 ... 199.9 mS/cm variable 0 mS/cm of 50 mS/cm,can be freely shifted inthe measuring range

199.9 mS/cm 10 mS/cm

0 ... 1000 mS/cm variable 0 mS/cm of 200 mS/cm,can be freely shifted inthe measuring range

1000 mS/cm 50 mS/cm

Salinity0.0 ... 70.0

variable 0.0 of 10,can be freely shifted inthe measuring range

70 5

When selecting the automatic measuring range, the REC range is always set to thehighest measuring range for the selected sensor type (see table on page 30).

Configuration

107

Setting for CRI:

Press the ENTER key and the following display appears:

Press the UP / DOWN key to set theupper limit of recorder range.

Press ENTER to continue with the lower limitof the recorder range.

Press the UP / DOWN key to set thelower limit of recorder range.

Press ENTER to confirm the input.

Configuration

108

Selecting the REC 2 recorder output (T option only)The display shows:

If the recorder range is exceeded (OFL), the recorderoutputs issue a constant signal of 20.5 mA.An automatic return to the preset recorder range is performed aftereliminating the exceeding of the recorder range.

Admissible recorder ranges:Sensortype

RECrange

Min.(measuringrange start)

Min. range Max.(measuringrange start)

D/span(setting steps)

700600300

variable -5 C von 20 C,can be freely shifted inthe measuring range

+60 C 1 C

101

0.10.01var

variable -5 C von 20 C,can be freely shifted inthe measuring range

+130 C 1 C

Selection: Press the ENTER key and the following display appears:

Press the UP / DOWN key to set theupper limit of recorder range.

Press ENTER to continue with the lower limitof recorder range.

The preset lower value appears:

Press the UP / DOWN key to set thelower limit of recorder range.


Configuration

109

Relay 1 / Relay 2 (Option R)The display shows:

Selecting the relay functions

A function can be assigned to each relay:

Function Description

nF (no function) Relay without any functionPS (power supply) Contact is closed when power is applied and opens if

there is a power fail

FrC (freeze) Is active if the measured value is frozen - e.g. duringcalibration

UL.LL (limits) Operates an upper / lower limit indicator and is activeon exceeding / untercutting the rated value

CS (cleaning cystem) Relay is used to periodically control an external probecleaning unit. The relay exclusively works as anormally open contact. During the cleaning process,the measured value remains frozen.

REL1

Crc

nF

Configuration

110

Limit indicator (UL.LL)The following functions can be selected:

UL Upper Limit

LL Lower Limit

Function Description

UL upper limit main parameterLL lower limit main parameterUL SAL upper limit salinity

LL SAL lower limit salinity

UL C upper limit temperature

LL C lower limit temperature

Setting:

Press the UP / DOWN keys to select the.LL relay function, e.g. for Relay 1.


Press the UP / DOWN keys to select therequired limit function,e.g.

for Relay 1. Press ENTER to confirm the input. Set Relay 2 in the same way. Then continue

with submenu CrF.

Configuration

111

Selecting the switching direction (opener / closer) for FrC, UL.LLThe CrF submenu is used to determine whether a relay operates as an opener(break) or a closer (make).

Use the UP

/ DOWN keys to selectbetween:CLOSER (C = Close)OPENER (O = Open)

Press the ENTER key to confirm theselection.

Conduct the setting forrelay 2 in the same way.

Parameterization

112

The parameterization creates the numeric values of the functions for which theinstrument is configured.

Factory settingsAdjustable function Setting Menu itemRecorder output 1:Current range/Attenuation

4 ... 20 mA / 20 mA/s PR1

Recorder output 2:Current range/Attenuation 1)

4 ... 20 mA / 20 mA/s PR2

Settings of theRS 485 digital interface 2)

SLAVE9600 Bd8 no (8 Bit, no Parity)Ident 01notr (made up of)

P1F

Code 000 PCDTemperature zero shift 0.0 C PtReference temperature 20 C PtrTemperature compensation nLF PtF1) T-Option only2)

RS-Option only

Parameterization

113

Calling up the parameterization levelCalling up the parameterization level from the measuring mode

Press the DOWN key Press the ENTER key

The first numeral flashes.

No code number is set in the delivery state.To access the configuration level press the ENTER key 3 times.If a code number was already set in an earlierparameterization, proceed as follows: Set the first numeral using the UP / DOWN

keys. Press ENTER to confirm the input. Set the other two numerals in the same way. PA appears.

Calling up the parameterization level from the configuration modeAfter the configuration has been completed, press the ENTER key.The following display appears:

It is possible to reach the parameterizationlevel directly by pressing the UP / DOWNkeys.


If an incorrect code is entered or the ESCAPE key pressed, access to theconfiguration is made in view mode. That is to say, settings can bechecked but not changed.

Parameterization

114

Overview table of the submenus

Display Description Option

Basicinstrument

Relay Option T RS 485

PrI Recorder output 1 +Pr2 Recorder output 2 +PL Limiting value indicator +PIF RS 485 interface +PCd Set up the code number +Pt Parameterization

temperature+

Ptr Reference temperature +PtF Parameterization

temperature function+

PCS Timer for external probecleaning unit

+

+ Menu appears in the corresponding model of the instrument.See the flow chart in the appendix.

Parameterization

115

REC 1 and REC 2 recorder outputs

This submenu enables the setting of: Current range

0 to 20 mA 4 to 20 mA

Attenuation [dI/dt.] (dI = current change; dt = time change) 0,1 mA/s 1 mA/s 5 mA/s 20 mA/s (= delivery state)Note:Attenuation = changing speed of the recorder flow [mA/sec]on a sudden change of the input signal.

Setting:

Press the ENTER key and the Pr1 submenu appears:

Use the UP

/ DOWN keys to select the currentrange.


Use the UP

/ DOWN keys to select theattenuation.


Press the ENTER key and the Pr2 submenu appears:

Set recorder output 2 in the same way asrecorder output 1.


Parameterization

116

Relay 1 / Relay 2 (R option)Limit indicator (UL.LL)

The PL submenu enables the allocation of the following values for the relay occupiedby a limit function (UL.LL) in the configuration level:1. Limiting value L (Limit)2. Hysteresis HS (Hysteresis)3. Time delay Td (Time delay)

The PL submenu displays only the limit functions (UL or LL) that wereselected in the configuration of the instrument(configuration level CrF!submenu).

Overview table:Nominal Minimum: lower measurement range final value (UBE)

Maximum: upper measurement range final value (OBE)Setting accuracy: depends on the meas. value displayDefault: for the upper limits, the maximum,

otherwise the minimumHysteresis Minimum: 0

Maximum: 10% of the measurement range (OBE - UBE)Setting accuracy: depends on the meas. value displayDefault: 0

Time delay Minimum: 0 secMaximum: 59 min 59 secSetting step: 1 secDefault: 0 sec

Nominal: Upper or lower limiting value (nominal value) that is set up.Exceeding or undercutting the measuring signal of this value causesswitching of the relevant relay programmed as a limit contact.

Hysteresis: Range above and below the set nominal value that shifts the switching point of the relay.In this way, oscillation of the regulation is prevented.

Time delay: Time in seconds for which the value must be applied before a release is performed (by which the switching of the relay can be delayed).

The input of these 3 values is subject to a compelled guidance.Even if no setting of hysteresis and time delay is planned (value = 0),you must pass through these submenus!

Parameterization

117

Setting the parameters for limit indicators

Example: Set up the upper limit for on relay 1.

Press the ENTER key to enter the PLsubmenu:

Press the ENTER key again to set thislimiting value.

The first/second/third or fourth numeral isflashing (depending on the confirmedmeasuring range). Use the UP / DOWN keys to set the

numeral (flashing) of the limiting value andconfirm it by pressing the ENTER key.

Set the other numerals in the same way. Confirm the last numeral using the ENTER

key and the HS submenu appears.

Use the UP / DOWN keys to set thenumerals (flashing) of the hysteresis.

Press the ENTER key to confirm the input. Set the other numerals in the same way.

Setting range: 0 to 10 % from the measuringrange.

Confirm the last numeral using the ENTERkey and the td submenu appears.

Parameterization

118

Use the UP / DOWN keys to set theseconds (right-hand flashing digits) ofthe time delay.

Press the ENTER key to confirm the input. Set the minutes (two numerals on the

left) in the same way.Setting range: 0 to 59 min 59 sec.

Press the ENTER key. Conduct the settingfor relay 2 in the same way.

Example:Rel 1: UL = 10 mS/cm HS = 1 mS/cm td = 10 sRel 2: LL = 5 mS/cm HS = 1 mS/cm td = 0

Parameterization

119

RS 485 interface (RS option) Press the ENTER key to start the PIF submenu:The parameterization of the RS 485 interface is described in a separate manual thatis supplied with instruments with a RS 485 interface (RS instrument version).

Setting up the codeThe setting of a code prevents changes to the configuration and parameterization ofthe instrument by the unintentional or erroneous pressing of an input key.On entering the configuration / parameterization, the code number must be enteredby the user (see Calling up the configuration level / Calling up the parameterizationlevel).No code is set in the delivery state.Thus, the configuration and parameterization of the instrument is not protected.Only after input of a code number the instrument is protected against unintended orunauthorized changes.

Setting: Call up the PCd submenu using ENTER:

The current code number appears on thedisplay (delivery state: 000).The first numeral flashes.

Set the first numeral using the UP / DOWNkeys.

Press the ENTER key to confirm the input.Note:(The code number 555 is not permitted!)

Set the other two numerals in the sameway.

Note:After the entry of a code number, the instrument can only be configured orparameterized using this new code!Removing the code number lockThe code number lock can only be entered by removing the reset in the delivery stateagain. To do this, enter the code number 000.

Parameterization

120

Temperature compensation

The Pt submenu enables compensation of the temperature measuring sensortolerances in the test probe (shifting of the zero point by a maximum of 0.5 C)

Immerse the measuring probe in a vessel containing at least 2 liters of water due to its thermal capacity.

Leave the measuring probe and reference thermometer in the water forat least 15 minutes, or with temperature differences between the waterand test probe > 10 C for at least 1 hour, and stir the water occasionally until the comparison can be made.

Setting: Use ENTER to call up the Pt submenu:

Use the UP / DOWN keys to set the value( 0.5 C). At the same time, the correctedmeasured value (upper line) and thecorrection value (lower line) are displayed.

Press the ENTER key to run through thereference temperature submenu.

Parameterization

121

Reference temperature

The conductivity is heavily dependent on the temperature.In the measuring mode, the conductivity referred to the reference temperatureappears.As a result of the translation of the conductivity to the reference temperature of 20 C(customary earlier) or 25 C (customary now), comparisons can be made of theconductivities measured for different medium temperatures.

Setting:

Use ENTER to call up the Ptr submenu:


Use the UP / DOWN keys to changebetween the reference temperature,20 C or 25 C.

Press the ENTER key to go tothe temperature function submenu.

Parameterization

122

Temperature functionThis submenu enables the setting of the temperature function for the temperaturecompensation.The following setting options can be selected: no function ( ) Linear temperature Function with setting options 0.5 ... 3.00 %/K non Linear Function (nLF).Setting:

Press the ENTER key to start the PtF submenu:

Example: Display of the measuring range of the nonLinear Function:With DOWN to

Linear temperature Function UP to

non Linear temperature Function.

Use the UP / DOWN key to select between: no temperature function, Linear temperature Function, non Linear Function (nLF).

Press the ENTER key to con firm it. Press the M key to return to the measuring mode.

Parameterization

123

Timer for an external probe cleaning unit (CS)The PL submenu allows for the allocation of the intervals for relays, which areconfigured in the configuration level to work as control relay for an external probecleaning unit (CS).The following intervals can be set:

Parameter Range Meaning tr 1 ... 168 h Interval between two cleaning processes. tc 1 ... 300 s Duration of the cleaning process. During the cleaning

process, the measured value remains frozen. th 1 ... 900 s Interval for keeping the measured value frozen after the

cleaning process is finished.

During tc and th no calibration is possible. If a cleaning process is to bestarted while a calibration is running, the start is delayed until thecalibration is finished.

Parameterization

124

Setting the intervals

PCS Press the ENTER key. The menu to input

the cleaning interval appears with the trdisplay and the current value in the lowerdisplay line.

REL1

!tr

142

The first digit flashes. Using the UP / DOWN keys set the flashing

digit. Confirm using ENTER. Set the other digits in the same way. After the last digit has been confirmed the

menu switches to the input of the cleaningduration (tc display). This value is set in thesame way.

Finally the additional waiting time is set up (thdisplay).

After the last pressing of the ENTER key the start menu of the parameterizationlevel appears (PA display).

Viewing Mode

125

Displaying the parameterization and configuration dataIn the viewing mode, settings can be viewed without having to input a code.However, the settings cannot be modified.To leave the measuring mode and go into the viewing mode, perform the followingsteps:

Press the DOWN key.

Press the ENTER key when the first numeral flashes.

Press the ESCAPE key. Use the UP / DOWN keys to change between the parameterization PA and

configuration C0. Press the ENTER key to run through the submenus.

Displaying the calibration data and software version By pressing the ENTER key in the measuring mode, the display shows the

cell constant and the set temperature coefficient, at no temperaturefunction or non Linear Function nLF.

Use the UP

/ DOWN keys to call up the So submenu:

Press the M key to return to the measuring mode.

Measuring Mode

126

The LF 170 and LF 296 instruments are automatically located in the measuring modefollowing the first commissioning.Otherwise, the measuring mode - except in compelled guidance - can be called upfrom any operating level by pressing the M key (see also section, Operatinginstructions).

Calibration

127

Check function / setting up the cell constantCalibration against the standard by changing the cell constant.

For the TetraCon 700, TetraCon 600 and TetraCon 300: in the range 10 %of the standard cell constant

For the cell constant 10 cm-1: in the range 50 % For the variable setting of the cell constant: in the range 0.09 cm-1 ... 1.5 cm-1 Press the C key to enter the Check submenu:

After pressing the C key, the recorder outputsand the pilot relay are frozen. To return to the measuring mode, use theENTER or M key.

The following values appear on the display:

Display of the cell constant set up. The value of a standard calibrating solution is

displayed in S/cm. The cell constant can be changed using the

UP/DOWN keys:Pressing and holding down the key causesthe value to be incremented or decrementedstarting with the last numeral.

To return to the measuring mode, press theENTER or M key.

During calibration or setting the cell constant, an automatic compensation is made tothe reference temperature, 25 C. The temperature coefficient of a 0.01 molarpotassium chloride solution according to the EN 27 888 standard is set to a fixedvalue. Using the UP/DOWN keys, the cell constant can continue to be changed until

1413 S/cm or the nearest value (1 digit of the cell constant corresponds to slightly more than1 S/cm) appears on the display.

Calibration

128

Calibrating errors Deviation of the cell constants: If the cell constant deviates by more than 10 % in the TetraCon 700, 600 and

300 sensors or by more than 50 % in the set cell constant 10 cm-1, an errormessage is output and four dashes appear on the display instead of the measuredvalues.

In the variable setting of the cell constant, this can only be changed within therange 0.09 cm-1 .. 1.5 cm-1.

The last measured value is frozen (important for relay and recorder). Error message in the LF-Check mode. The sensor icon flashes.

This message appears if the cell constant isexceeded or undercut by more than 10 % or 50 %.

To switch to the measuring mode, press the ENTER key:

Measuring is only possible after a valid LF-Check! To recover from the error message: Check the measuring cell and clean or

replace it if necessary. Check the standard calibration solution and

replace it if necessary. Perform the LF-Check again.

If these measures are unsuccessful or cannot be performed and further measurementis still required, it is possible to proceed as follows: Use the C key to return to the LF-Check operating mode. Use the UP/DOWN keys to set the cell constant back to the allowable range of

10 % or 50 % of the default value.

Calibration

129

Note: Measured values that are recorded after an invalid LF-Check and

resetting of the cell constant (as described above), are affected by agreater measuring error and no longer correspond to the specificationsgiven in the chapter Technical Data! It is strongly recommended to check the measuring system to achieve avalid LF-Check! If the error cannot be remedied, contact the Technical Servicedepartment of WTW.

Checking Mode

130

The checking mode may only be used by trained specialistpersonal as special knowledge is required.

The interfaces of the LF 170 or LF 296 and connected peripheral devices(e.g. recorder, PLC, PC, printer) can be checked in the checking mode. Furthermore, the user can display the code number.

Calling up the checking mode To leave the measuring mode and enter the checking mode, press and hold

down the ESCAPE key and briefly press the UP key Leave the checking mode again by pressing the M or C key.

Displaying the code number The code number is displayed in the Cod submenu after pressing the ENTER key:

Press the ENTER key again to continue withrecorder output 1

Checking Mode

131

Recorder output 1 A current of 0.1 mA is set in the tSt rEC1 submenu after pressing the ENTER key:

Press C to set the current to 20.0 mA Press M to set the current to 0.1 mA Press UP to increase the current

(max. 20.5 mA) Press DOWN to decrease the current

(min. 0.0 mA) Press the ENTER key again to continue with

recorder output 2

Recorder output 2 A current of 0.1 mA is set in the tSt rEC2 submenu after pressing the ENTER key:

Press C to set the current to 20.0 mA Press M to set the current to 0.1 mA Press UP to increase the current

(max. 20.5 mA) Press DOWN to decrease the current

(min. 0.0 mA) Press the ENTER key again to continue with

the relay test.

Checking Mode

132

Relay test After pressing the ENTER key, the tSt message flashes in the tSt rEL submenu:

Note:Rel 1 and Rel 2 are only addressed if the controloption is present. If a relay is switched on, the relevant symbolappears on the display. Press the ESCAPE key:

Relay 1 On/Off Press the UP key:

Relay 2 On/Off Press the ENTER key to continue with RS485

RS 485 After pressing the ENTER key, the tSt message flashes in the tSt 485 submenu:

Note:The menu item only appears if the RS 485interface is present. The RS 485 operates in the test mode as arepeater, i.e. all the blocks received are sentback again. Press the ESCAPE key:

Sends the instrument identification accordingto the "RSID" RS command (with RS 485 protocol)

Press the UP key:Sends the instrument identification accordingto the "RSID" RS command (without RS 485 protocol; for printer output)

Press the ENTER key:Terminates the RS 485 test to continue withDisplaying the code number

Checking Mode

133

Flowchart

M

C

Measure / Calibrate

Measure+

M

C

+

M

C

+

M

C

+

Cleaning and Maintenance

134

The LF 170 and LF 296 instruments are largely maintenance-free. Some instructions are given here on taking care of the instruments: Keep the instruments free from dust and dirt as far as possible. Do not use a high-pressure cleaner to clean the housing. Do not use any cleaning agent that contains solvent. Follow the details given in the sensor operating manual on cleaning and

maintenance of the sensors! Check the instruments regularly for mechanical damage and, if necessary, take

them out of service. Follow the safety instructions even when carrying out cleaning activities!

Troubleshooting

135

The following messages could occur (shown in order of priority):

Message Reason Measure

Err Serious error that does notpermit any further measuring

Send the instrument toWTW

0FL The /temperature value liesoutside the measuring range(Overflow)

Adapt the measuringrange

Check the sensor andsensor connection

Measured valueflashes

An overflow is present on thecorresponding recorder output

Adapt the recorder range Adapt the measuring

range

----

Error display in the LF-Checkmode

Error display in the measuringmode

Check the measuring celland clean or replace it ifnecessary

Check the standardcalibration solution andreplace it if necessary.

ErrAoPt

Hardware error Send the instrument toWTW

Technical data

136

LF 170

Display Measured value LCD 7 segment

3-digit Temperature 4-digit

Units, settings Symbols measurement Cells that can be connected 2 or 4-electrode cells Display and measuring range

Up to 1000 mS/cm depending on the sensor type

Measured value resolution 0.001 S/cm ... 1 mS/cm (according to the measuringrange)

Accuracy 0.5% from measuring value 1 digit Automatic temperaturecompensation

- 5 C ... + 60 C(TetraCon 700, 600, 300)

- 5 C ... + 130 C(0.01 cm-1; 0.1 cm-1; 10 cm-1; 1 cm-1)

Reference temperature + 20 C; + 25 C configurable Calibration Calibration against the standard by changing the

cell constant: 10 % (TetraCon 700, 600 und 300) 50 % (Cell constant 10 cm-1) 0.09 cm-1 ... 1.5 cm-1 in the variable setting of the

cell constant Salinity measurement Display and measuring range

0.0 ... 70.0

Measured value resolution 0.1 Reference temperature 20 C

Technical data

137

Temperature measurement

Temperature sensor NTC Accuracy 0.2 K 1 digit

Additional fine adjustment of 0.5 K Resolution 0.1 K Inputs / outputs digital Interface RS-485; 2(3)-wire connection bus operation with up to

31 units is possible

Sensor input 7-contact round plug connector with screw fixing Contact outputs Relay 1/ Relay 2 Functions, limit controller max. switching voltage 250 VAC

max. switching current 5 A max. switching capacity 150 W (ohmic load)

Signal outputs 0/4 to 20 mA; electrically isolated from the inputRecorder ranges and recorder attenuation can be setvia software Basic accuracy 0.1% Load max. 600 Ohm Load effect < 0.1 %

Connector terminals Accessible after opening the instrument;Cable inlet by 4 PG screws Connector cross section 0.5 to 2.5 mm Power supply 2-contact Relay 1/2 each 2-contact SENS Check 2-contact Recorder connections each 2-contact Sensor 6-contact

Protection type Lightning protector(inputs and outputs)

Coarse protection 90 V / 1.5 KA (8/20s) Fine protection 600 Watt

Electrical instrumentprotection

Safety class 2 according to IEC 1010

Housing IP 66

Technical data

138

Electrical connection data Voltage supply(depending on the instrumentversion)

230 VAC ( 15% + 10%) 115 VAC ( 15% + 10%) 24 VAC ( 15% + 10%) 24 VDC ( 30% + 20%)

Frequency 48 to 62 Hz Power consumption Max. 18 Watt Test certificates CE (for all supply voltages) Interference suppression According to EN 50081-1, FCC class A Interference immunity According to EN 50082-2, Namur recommendations

Ambient temperature Limits of operating range 25 C to + 55 C Storage and transport temperature

25 C to + 65 C

Climate class Climate class 4, VDI / VDE 3540 Bl.2 Mechanical data Dimensions 222 x 238 (202) x 105 mm (B x H x T)

(height in parentheses without PG screws) Weight Approx. 2.2 kg Keypad (material) Polyester Housing (material) Polycarbonate

Technical data

139

LF 296

Display Measured value LCD 7 segment

3-digit Temperature 4-digit

Units, settings Symbols measurement Cells that can be connected 2 or 4-electrode cells Display and measuring range

Up to 1000 mS/cm depending on the sensor type

Measured value resolution 0.001 S/cm ... 1 mS/cm (according to the measuringrange)

Accuracy 0.5% from measuring value 1 digit Automatic temperaturecompensation

- 5 C ... + 60 C(TetraCon 700, 600, 300)

- 5 C ... + 130 C(0.01 cm-1; 0.1 cm-1; 10 cm-1; 1 cm-1)

Reference temperature + 20 C; + 25 C configurable Calibration Calibration against the standard by changing the

cell constant: 10 % (TetraCon 700, 600 und 300) 50 % (Cell constant 10 cm-1) 0.09 cm-1 ... 1.5 cm-1 in the variable setting of the

cell constant Salinity measurement Display and measuring range

0.0 ... 70.0

Measured value resolution 0.1 Reference temperature 20 C

Technical data

140

Temperature measurement

Temperature sensor NTC Accuracy 0.2 K 1 digit

Additional fine adjustment of 0.5 K Resolution 0.1 K Inputs / outputs digital Interface RS-485; 2(3)-wire connection bus operation with up to

31 units is possible

Sensor input 7-contact round plug connector with screw fixing Contact outputs Relay 1/ Relay 2 Functions, limit controller max. switching voltage 250 VAC

max. switching current 5 A max. switching capacity 150 W (ohmic load)

Signal outputs 0/4 to 20 mA; electrically isolated from the inputRecorder ranges and recorder attenuation can be setvia software Basic accuracy 0.1% Load max. 600 Ohm Load effect < 0.1 %

Connector terminals Accessible after opening the instrument;Cable inlet by 4 PG screws Connector cross section 0.5 to 2.5 mm Power supply 2-contact Relay 1/2 each 2-contact SENS Check 2-contact Recorder connections each 2-contact Sensor 6-contact

Protection type Lightning protector(inputs and outputs)

Coarse protection 90 V / 1.5 KA (8/20s) Fine protection 600 Watt

Electrical instrumentprotection

Safety class 2 according to IEC 1010

Housing IP 54

Technical data

141

Electrical connection data Voltage supply(depending on the instrumentversion)

230 VAC ( 15% + 10%) 115 VAC ( 15% + 10%) 24 VAC ( 15% + 10%) 24 VDC ( 30% + 20%)

Frequency 48 to 62 HzPower consumption Max. 18 WattTest certificates CE (for all supply voltages)Interference suppression According to EN 50081-1, FCC class AInterference immunity According to EN 50082-2, Namur recommendations

Ambient temperatureLimits of operating range 25 C to + 55 CStorage and transporttemperature

25 C to + 65 C

Climate class Climate class 4, VDI / VDE 3540 Bl.2

Mechanical dataDimensions 96 x 96 x 168 mm (B x H x T)

(height in parentheses without PG screws)Weight Approx. 1.1 kgKeypad (material) PolyesterHousing (material) Fiber-reinforced Noryl

Documents

Wtw Ol Man Monitors Cond 170 296 All[1]