48
DG Instruction Manual Model 7EC Controller 1262-IN-013-0-02 December 1997

Barber Colman 7EC

Embed Size (px)

Citation preview

Page 1: Barber Colman 7EC

DG

Instruction Manual

Model 7EC Controller

1262-IN-013-0-02December 1997

Page 2: Barber Colman 7EC

2

1/8 DIN, Four Digit Display,Temperature Controller with Analog Output

MODEL: 0 7 E C - 9 3 7 1 - 3 0 - 0 - 0 0Field No. 1 2 3 4 5 6 7 8 9 10 1112 13 14 15

Fields 1 through 4. BASE07EC - Controller

with 24 Vdc Auxiliary Power Supply

Fields 5 through 8. INPUT/OUTPUT9371 - TC types J, K, L, N, R, S and T;

Pt 100, 3 wire RTD;0 to 20 mAdc and 4 to 20 mAdc;0 to 60 mVdc and 12 to 60 mVdc;0 to 5 Vdc and 1 to 5 Vdc;0 to 10 Vdc and 2 to 10 Vdc.Note: All inputs are factory calibratedand selectable by keyboard. Factoryset at type J.Output 1: 0 to 20 mAdc or 4 to 20 mAdcprogrammable as heating, cooling orretransmission.Output 2: SPST relay (NO/NC jumperselectable) or SSR programmable asheating, cooling or alarm 1.Output 3: SPST relay programmableas heating, cooling or alarm 2.

Field 9. OPTIONS1 - None2 - Output 4 (alarm 3)3 - RS-485, plus output 4 (alarm 3)

Field 10. POWER SUPPLY3 - 100 to 240 Vac

Fields 11 through 15. RESERVED

Page 3: Barber Colman 7EC

3

Congratulations

. . . on your purchase of one of the easiest toconfigure controllers on the market. After a fourstep configuration procedure, your process willbe up and running.

If for any reason you encounter difficulty with thecontroller set-up, please call your supplier.

Guide to simple set-up

To set-up the controllersonly four steps are required:1. Wire the Instrument.2. Configure the instrument.3. Check the operating mode parameters.4. Check the autotune (Smart AT) process.

Un p ac k t he In st ru m e nt

W iring

C o nf ig u ra tio n

O p erating Pa ra m et ers

Au to tu ning

S V

Page 4: Barber Colman 7EC

4

CAUTION:USE WIRE SUITABLE FOR

75°C MINIMUM.

NOTES

• For supply connections use No 16 AWG orlarger wires rated for at least 75 °C.

• Use copper conductors only.• Class 2 wiring must be separated a

minimum of 1/4 inch from any Class 1conductors.

ContentsWiring Guidelines ............................................. 7Configuration ................................................. 13

Preliminary Hardware Settings ............... 13Configuration Key Functions ................... 14Configuration Procedure ......................... 15Default Configuration Parameters ........... 23

Operating Mode ............................................. 25Display Function ...................................... 25Setpoint Selection ................................... 25Operating Key Functions ......................... 26Enable/Disable Control Outputs .............. 26Manual Function ...................................... 26Setpoint Access ....................................... 27Serial Link ................................................ 27Autotuning (Smart AT) ............................. 27Lamp Test ................................................ 28Operating Parameters ............................. 28Error Messages ....................................... 30Default Operating Parameters ................ 32

Specifications ................................................. 34General .................................................... 34Inputs ....................................................... 35Setpoints ................................................. 36Control Action .......................................... 36Outputs .................................................... 36Alarms ..................................................... 37Options .................................................... 38

Calibration ...................................................... 39Calibration Parameters ........................... 40Procedure ................................................ 40

Maintenance .................................................. 46

Page 5: Barber Colman 7EC

5

Mounting Requirements

Select a mounting location with the followingcharacteristics:1) Minimum vibration.2) Ambient temperature between 0 and 50 °C (32

and 122 °F).3) Easy access to the rear of the instrument.4) No corrosive gases (sulfuric gas,

ammonia, etc.).5) No water or other fluid (i.e. condensation).6) Relative humidity of 20 to 85% non

condensing.

The instrument can be mounted on a panel up to 15mm (0.591 in) thick with a square cutout of 45 x 92

mm (1.772 x 3.662 in). For outline refer to Dimensionsand Panel Cutout.

Panel surface texture must be better than 248microinches.

The instrument is shipped with a rubber panel gasket(50 to 60 Sh). To assure the IP65 and NEMA 4protection, insert the panel gasket between theinstrument and the panel as shown below.

Install the instrument as follows:

1) Insert the instrument case in the gasket.2) Insert the instrument in the panel cutout.3) Pushing the instrument against the panel, insert

the mounting bracket.4) Torque the mounting bracket screws between

0.3 and 0.4 Nm (0.021 and 0.027 lbft).5) Make sure the instrument will not move within

the cutout to insure NEMA 4X/IP65 protection.

B ra cke t

P a ne l

G aske t

Page 6: Barber Colman 7EC

6

Dimensions and Panel Cutout

116 m m 4 .56 7 in

60 m m 2 .362 in

125 m m 4 .921 in

4 5 m m , - 0, +0 .6 m m 1 .772 in , -0 , + 0 .024 in

92 m m , -0 , + 0 .8 m m 3 .622 in, - 0, +0 .031 in

48 m m 1 .890 in

96 m m 3 .780 in

10 m m (0 .394 in)

Page 7: Barber Colman 7EC

7

WIRING GUIDELINES

Terminal board

Note: The control outputs are protected by varistoragainst an inductive load up to 0.5 Amps. For theother outputs or external contacts in series with theinstrument outputs, connect an external snubbernetwork (RC) across the terminals:

CR

in accordance with the following table:

Load C(µ) R(ohms) P(W) R & C<40 mA 0.047 100 1/2 260 Vac<150 mA 0.1 22 2 260 Vac<0.5 A 0.33 47 2 260 Vac

Measuring inputsAny external components (like zener diodes, etc.)connected between the sensor and input terminalsmay cause measurement errors (excessive orunbalanced line resistance or possible leakagecurrents).

Thermocouples

S hie ld

S hie ld

1

3

1

3

+

-

+

-

Note:1) Do not run input wires with power cables.2) For TC wiring use proper compensating

cable, preferably shielded (see Thermo-couple Compensating Cable ColorCodes).

3) Shielded cable should be grounded at oneend only.

1 00 /24 0V ac PW R L INE

12

13

15

14O U T 1

m A

AU X 2 4V

D IG 1

DIG 2

C

O U T 2 SSR

16

17

18

19

21

22 11

10

9

8

7

6

5

4

3

TC

1

20

N O

N O

N O

L INE A R IN PU TS

RTD

O UT 3

O UT 4

O U T 2

R S 48 5

C

C

A /A ’

B/B ’

C

Page 8: Barber Colman 7EC

8

Linear input

1

3

m A , m V o r V

Sh ie ld

-

+

1

3

m A , m V o r V

Sh ie ld

-

G

+

Note:1) Do not run input wires with power cables.2) High line resistance can cause measure-

ment errors.3) When shielded cable is used, ground it at

one end only to avoid ground loopcurrents.

4) The input impedance is equal to:Less than 5 ohms for 20 mA inputGreater than 1 megohms for 60 mV inputGreater than 200 kilo-ohms for 5 V inputGreater than 400 kilo-ohms for 10 V input.

British American German FrenchType Material Leg BS1843 ANSI MC 96.1 DIN 43710 NFE 18-001T Copper + White Blue Red Yellow

Constantan - Blue Red Brown BlueBlue Blue Brown Blue

J/L Iron + Yellow White Red YellowConstantan - Blue Red Blue Black

Black Black Blue BlackK Nickel Chromium + Brown Yellow Red Yellow

Nickel Aluminum - Blue Red Green PurpleRed Yellow Green Yellow

R Platinum + White Black Red WhitePlatinum 13% Rh - Blue Red White Green

Green Green White GreenS Platinum + White Black Red White

Platinum 10% Rh - Blue Red White GreenGreen Green White Green

E Chromel + Brown Violet Red YellowConstantan - Blue Red Black Violet

Brown Violet Black VioletB Platinum 30% Rh/ + Grey Red

Platinum 6% Rh - Red GreyGrey Grey

N Nicrosil + Orange Orange Orange OrangeNisil - Red Red Red Red

Orange Orange Orange Orange

Thermocouple Compensating Cable Color Codes

Page 9: Barber Colman 7EC

9

RTD input

RT D R T D

134 1 34

Note:1) Do not run RTD wires with power cables.2) Pay attention to line resistance: high

resistance may cause measurment errors.3 ) Ground shielded cable at one end only.4) The resistance of the 3 wires must be the

same.

TX input

O ut

O ut

Pw r

Pw r

4 W

ire

Tran

smitt

er

O ut

Pw r

G rd

3 W

ire

Tran

smitt

er

O ut

O ut

2 W

ire

Tran

smitt

er

In

In

In

In

In

In

A ux

A ux

A ux

A ux

A ux

A ux

1

3

5

6

1

3

5

6

1

3

5

6

Notes:1) Don't run input wires together with power

cables.2) When shielded cable is used, it should be

grounded at one side only and possibly tothe terminal 6 of the instrument.

3) The impedance of the 20 mA input is lessthan 5 ohms.

4) The auxiliary power supply (Aux) is rated24 Vdc (±10%), 25 mA maximum.

5) The auxiliary power supply (Aux) is notisolated from measuring input.

Page 10: Barber Colman 7EC

10

Logic inputSAFETY NOTE:• Do not run logic input wiring with AC

power cables.• Use an external dry contact capable of

switching 0.5 mA, 5 Vdc.• The instrument needs 100 ms to recognize

a contact status variation.• Logic inputs are not isolated by the

measuring input.

7

L o gic inp u t 2

6

8

Lo g ic in p ut 1

This instrument has 4 setpoints (SP, SP2, SP3and SP4). Setpoint selection can only be madewith logic inputs 1 and 2 (terminals 6, 7 and 8).

Logic Input 1 Logic Input 2 Op. SetpointOpen (6 - 7) Open (6 - 8) SPOpen (6 - 7) Closed (6 - 8) SP2Closed (6 - 7) Open (6 - 8) SP3Closed (6 - 7) Closed (6 - 8) SP4

Relay outputs

1 8

1 9

2 0

NO - O U T 4

NO - O U T 3

C - O UT 3/4

2 1

2 2

C

NO

O U T 2

O U T 3

O U T 4

Relay output: Protected by varistor against in-ductive load with inductive component up to 0.5 A.OUT 2: Contact rating of 3 Amps/250 Vac resis-tive load.OUT 3 and 4: Contact rating of 2 Amps/250 Vacresistive load.Number of operations: 1 x 105 at the specifiedrating.

Notes:1) To avoid shock and possible instrument

damage, connect power last.2) For power connections use 16 AWG or

larger wires rated for 75 °C.3) Use copper conductors only.4) Do not run input wires with power cables.

Page 11: Barber Colman 7EC

11

Inductive loads

High voltage transients may occur when switch-ing inductive loads. Through the internal con-tacts these transients may introduce distur-bances which can affect instrument perfor-mance. For all the outputs, the internal protec-tion (varistor) assures protection up to 0.5 Ampsof inductive component.

The same problem may occur when a switch isused in series with the internal contacts asshown:

L O A D

RC

P O W ERLIN E

In this case, it is good electrical practice to in-stall an additional RC network across the exter-nal contacts as shown. The value of capacitor(C) and resistor (R) are shown in the followingtable.Load C (µF) R(ohms) P(W) Operating V<40 mA 0.047 100 1/2 260 Vac<150 mA 0.1 22 2 260 Vac<0.5 A 0.33 47 2 260 Vac

The cable used for relay output wiring must beas far away as possible from input or communi-cation cables.

Voltage outputs for SSR drive

1 6

- -

+

+

O U T 2

1 7

S olid S tate R e la y

This is a time proportioning output.

Logic voltage for SSR drive.

Logic level 0: Vout less than 0.5 Vdc.Logic level 1: 24 Vdc +/-20% @ 20 mA

Maximum current = 20 mA.

Note:This output is not isolated. A double or rein-forced solation between the instrument outputand the power supply must be made by an ex-ternal solid state relay.

Page 12: Barber Colman 7EC

12

Linear output

1 4

- -

++

O U T 1

15

20 mA

This instrument is equipped with one linear out-put (OUT 1) programmable as:• Main output (heating or cooling).• Secondary output (cooling).• Analog retransmission of the measured

value.• Analog retransmission of the operating

setpoint.

This is an isolated analog output with a maxi-mum load of 500 ohms.

Serial interface

The RS-485 interface can connect up to 30 in-struments with the remote master unit. Maxi-mum cable length: 1.5 km (9/10 mile) at 9600BAUD.

1 1

1 0

9

A /A ’ A ’ /A

B /B ’ B’/B

C o m m o n

M A S T E R

1 1

1 0

9

A /A ’ A ’ /A

B /B ’ B’/B

C o m m o n

1 1

1 0

9

M A S T E R

According to EIA specifications for RS-485.a) The "A" terminal of the generator shall be

negative with respect to the "B" terminalfor a binary 1 (MARK or OFF) state.

b) The "A" terminal of the generator shall bepositive with respect to the "B" terminalfor a binary 0 (SPACE or ON) state.

Page 13: Barber Colman 7EC

13

CONFIGURATION

Preliminary Hardware Settings1) Remove the instrument from its case.2) Set J1 according to the following table.

Store unused jumper on pins 7-9.

Power line and grounding

1 3

1 2

Pow e r S up ply 10 0 to 240 Va c rm s (50/60 Hz )

or 24 Va c/Vd c

N

NR (S, T )

R (S, T )Note:1) Before connecting power line, check that

the voltage is correct (see Model Number).2) For supply connections use 16 AWG or

larger wires rated for at least 75 °C.3) Use copper conductors only.4) Do not run input wires with power cables.5) Polarity does not matter for 24 Vdc wiring.6) The power supply input is fuse protected

by a sub miniature fuse rated T, 1A, 250 V.When the fuse is damaged the instrumentshould be returned to your supplier tocheck the power supply.

7) Safety requirements for permanentlyconnected equipment:• Include a switch or circuit-breaker in

the installation.• Place it in close proximity to the

equipment and within easy reach ofthe operator.

• Mark it as the disconnecting devicefor the equipment.

A single switch or circuit-breaker can drive morethan one instrument.8) When the NEUTRAL line is present, connect

it to terminal 13.9) To avoid shock and possible instrument

damage, connect power last.

INPUT J1

TYPE 1-2 3-4 5-6 7-8 9-10

TC-RTD open close open open open

60 mV open close open open open

5 V close open close open open

10 V open open close open open

20 mA open open open close close

Page 14: Barber Colman 7EC

14

Open input circuitThis instrument is able to identify the open circuitfor TC and RTD inputs. The open circuit conditionfor RTD input is shown by an "overrange"indication. For TC input, either an overrangeindication (standard) or an underrange indicationcan be selected for CH2 and SH2 according tothe following table:

Overrange (Std): CH2 - close SH2 - openUnderrange: CH2 - open SH2 - close

Output 2 typeJ303 is used to set the Output 2 contact action(N.O. = 1-2 (std.) or N.C = 2-3):

J303

C a utio n: S olde r c arefu lly to av o id d am a ge to P C B o r o th er com po n en ts .

1

23

1

23

Configuration Key FunctionsFUNC = The new setting of the selected

parameter is stored and the nextparameter is displayed (in increasingorder).

MAN = Scrolls back through the parameterswithout storing the new setting.

s = Increases the setting of the selectedparameter.

t = Decreases the setting of the selectedparameter.

Configuration Procedure1) Remove the instrument from its case.2) Open switch V1 (see Figure 1).3) Re-insert the instrument in its case.

Page 15: Barber Colman 7EC

15

4) Switch on power to the instrument.The display will show COnF. (If “CAL” isdisplayed, press the s key to return to theconfiguration procedure.)

5) Press the FUNC key.

Note: The default setting of each parameter inthe following listing is underscored.

SEr1 = Serial interface protocolOFF = No serial interface.Ero = Poll/select (proprietary protocol).nbUS = ModbusjbUS = Jbus

SEr2 = Serial link device addressNot available when SEr1 = OFF.From 1 to 95 for proprietary protocol.From 1 to 255 for all other protocols.Note: The electrical characteristics of the RS-485 serial interface allows 30 devices maximum.

SEr3 = Baud rate for serial linkNot available when SEr1 = OFF.From 600 to 19200 baud.Note: 19200 baud is displayed as 19.2.

SEr4 = Byte format for serial linkNot available when SEr1 = OFF.7E = 7 bits + even parity (proprietary protocol)7O = 7 bits + odd parity (proprietary protocol)8E = 8 bits + even parity8O = 8 bits + odd parity8 = 8 bits without parity

P1 = Input type and standard range0 = TC type L range 0 to +400.0 °C1 = TC type L range 0 to +900 °C2 = TC type J range -100.0 to +400.0 °C3 = TC type J range -100 to +1000 °C4 = TC type K range -100.0 to +400.0 °C5 = TC type K range -100 to +1370 °C6 = TC type T range -199.9 to +400.0 °C7 = TC type N range -100 to +1400 °C8 = TC type R range 0 to +1760 °C9 = TC type S range 0 to +1760 °C10 =RTD type Pt 100 -199.9 to +400.0 °C11= RTD type Pt 100 -200 to +800 °C12 =mV Linear range 0 to 60 mV13 =mV Linear range 12 to 60 mV14 =mA Linear range 0 to 20 mA15 =mA Linear range 4 to 20 mA16 =V Linear range 0 to 5 V17 = V Linear range 1 to 5 V18 =V Linear range 0 to 10 V19 =V Linear range 2 to 10 V20 =TC type L range 0 to +1650 °F21 =TC type J range -150 to +1830 °F22 =TC type K range -150 to +2500 °F23 =TC type T range -330 to +750 °F24 =TC type N range -150 to +2550 °F25 =TC type R range 0 to +3200 °F26 =TC type S range 0 to +3200 °F27= RTD type Pt 100 -199.9 to +400.0 °F28 =RTD type Pt 100 -330 to +1470 °F

None: Selecting P1 = 0, 2, 4, 6, 10 or 27 setsdigital filters (P44 and P45) to FLtr. For all theremaining ranges it will set to nOFL.

Page 16: Barber Colman 7EC

16

P2 = Decimal point positionThis parameter is available only when a linearinput is selected (P1 = 12, 13, 14, 15, 16, 17, 18or 19).

– – – – . = No decimal.– – – . – = One decimal place.– – . – – = Two decimal places.– . – – – = Three decimal places.

P3 = Initial scale valueProgrammable from -1999 to 4000 for linearinputs. Programmable within the input range forTC and RTD. When this parameter is modified,rL will also change. Default = 0.

P4 = Full scale valueProgrammable from -1999 to 4000 for linearinputs. Programmable within the input rangefor TC and RTD. When this parameter ismodified, rH will also change. Default = 1000.

The initial and full scale values determine theinput span used by the PID algorithm, theautotuning (Smart AT) and the alarm functions.

Minimum input span in absolute value(S = P4 - P3) is as follows:• For linear inputs, S > 100 units.• For TC input with °C readout, S > 300 °C.• For TC input with °F readout, S > 550 °F.• For RTD input with °C readout, S > 100°C.• For RTD input with °F readout, S > 200 °F.

P5 = Output 1 functionrEv = Reverse acting (Heating).dIr = Direct acting (Cooling).Pv.rt = Retransmits the process variable.SP.rt = Retransmits the operating setpoint.

t

t

Inpu

tO

utp

ut

D irect A ct ion

t

t

Inpu

tO

utp

ut

R eve rse A c tio n

P6 = Output 1 type0-20 = Type 0 to 20 mA.4-20 = Type 4 to 20 mA.

P7 = Retransmission - initial scale valueAvailable only when P5 = Pv.rt or SP.rt.Range: -1999 to 4000. Default = 0.

P8 = Retransmission - Full scale valueAvailable only when P5 = Pv.rt or SP.rt.Range: -1999 to 4000. Default = 1000.

P9 = Output 2 functionnonE = Not used.rEv = Reverse acting control output (Heating).dir = Direct acting control output (Cooling).AL1.P = Alarm 1 output, process alarm.AL1.b = Alarm 1 output, band alarm.AL1.d = Alarm 1 output, deviation alarm.

Page 17: Barber Colman 7EC

17

Notes:1) Setting P9 = rEv forces the output 2 cycle

time (Cy2) to:• 15 seconds when P10 = rEL• 4 seconds when P10 = SSr

2) Setting P9 = dir forces the output 2 cycletime (Cy2) to:• 10 seconds when P25 = Alr• 4 seconds when P25 = OIL• 2 seconds when P25 = H2O

P10 = Output 2 typeSkipped when P9 = nonE.rEL = RelaySSr = SSR

Notes: When:Cy2 = 15, when P9 = rEv and P10 = rELCy2 = 4, when P9 = rEv and P10 = SSr

P11 = Alarm 1 operating modeAvailable only when P9 = AL1.P, AL1.b or AL1.d.H.A. = High alarm (outside of the band) with

automatic reset.L.A. = Low alarm (inside the band) with

automatic reset.H.L. = High alarm (outside of the band) with

manual reset.L.L. = Low alarm (inside the band) with manual

reset.

P12 = Output 3 functionnonE = Output not used.rEv = Used as control output with reverse

action (Heating).dir = Used as control output with direct action

(Cooling).AL2.P = Used as Alarm 2 output and is

programmed as process alarm.AL2.b = Used as Alarm 2 output and is

programmed as band alarm.AL2.d = Used as Alarm 2 output and is

programmed as deviation alarm.

Note:When P12 = rEv, then Cy3 = 15When:P12 = dir and P25 = Alr, then Cy3 = 10P12 = dir and P25 = OlL, then Cy3 = 4P12 = dir andP25 = H2O, then Cy3 = 2

Notes on P5, P9 and P12:1) Only 1 of the 3 outputs can be configured

as "rEv."2) Only 1 of the 3 outputs can be configured

as "dir."3) When no outputs are configured as a

control output the instrument will operateas an indicator.

Page 18: Barber Colman 7EC

18

P13 = Alarm 2 operating modeAvailable only when P12 = AL2.P, AL2.b orAL2.d.H.A. = High alarm (outside of the band) with

automatic reset.L.A. = Low alarm (inside the band) with

automatic reset.H.L.= High alarm (outside of the band) with

manual reset.L.L. = Low alarm (inside the band) with manual

reset.

P14 = Output 4 functionnonE = Output not used.AL3.P = Used as Alarm 3 output and is

programmed as process alarm.AL3.b = Used as Alarm 3 output and is

programmed as band alarm.AL3.d =Used as Alarm 3 output and is

programmed as deviation alarm.

P15 = Alarm 3 operating modeAvailable only when P14 = AL3.P, AL3.b or

AL3.d.H.A.= High alarm (outside of the band) with

automatic reset.L.A.= Low alarm (inside the band) with

automatic reset.H.L.= High alarm (outside of the band) with

manual reset.L.L.= Low alarm (inside the band) with manual

reset.

P16 = Alarm 3 programmabilityNot available when P14 = "nonE."OPrt = Setpoint and hysteresis can be

programmed in the operating mode.COnF = Setpoint and hysteresis can be

programmed in the configuration mode.

P17 = Alarm 3 setpoint valueAvailable only when P14 = AL3.P, AL3.b or AL3.dand P16 = COnF. Default = 0. Ranges:

Process alarm: within limits (P3 - P4).Band alarm: from 0 to 500 units.Deviation alarm: from -500 to 500 units.

P18 = Alarm 3 hysteresisAvailable only when P14 = AL3.P, AL3.b or AL3.dand P16 = COnF. Range: From 0.1 to 10.0 % ofthe span selected with P3 and P4 parameters or1 LSD.

P19 = Soft start setpointSetpoint setting (in engineering units), to initiatethe “Soft Start” function (output power limiting)at start-up. Range: Within the readout span.Note: This setpoint setting will not be used whentOL = InF. Default = 0.

P20 = Safety lock0 =Unlocked. The device is always unlocked

and all parameters can be modified.1 = Locked. No parameters (except the

setpoints SP, SP2, SP3 and SP4 andalarm manual reset) can be modified. Forautotuning (Smart AT) status see P35.

Page 19: Barber Colman 7EC

19

From 2 to 4999 = This code number is apassword used in run time (see nnnparameter), to put device in lock/unlockcondition. For the four setpoints andmanual reset of the alarm, the lock/unlockcondition has no affect. For Smart ATstatus, see P35.

From 5000 to 9999 = This code number is apassword used in run time (see nnnparameter), to put device in lock/unlockconditon. For the four setpoints, AL1, AL2,AL3 and manual reset of the alarms, thelock/unlock condition has no affect. ForSmart AT status, see P35

When safety lock is selected, the secret valuecan not be displayed again and the display willshow 0, 1, SFt.A (when P20 is encompassedbetween 2 and 4999) or SFt.b (when P20 isencompassed between 5000 and 9999).

The configuration procedure is now complete.The instrument should show "–.–.–.–." on bothdisplays. To access the advanced configurationparameters proceed as follows:1) Use the s or t keys, set the code to 261.2) Press the FUNC key.

Advanced Configuration Procedure

P21 = Power output of the main controloutput

Skipped when no outputs are configured ascontrol output.norL = PID algorithm.cnPL = Complement of the product of PID

algorithm (100 - Product of PID algorithm).

P22 = Power output displayed for the maincontrol output

Skipped when no outputs are configured ascontrol output.norL = PID algorithm calculated for the main

control output.cnPL = Complement of the PID algorithm

calculated for the main control output(100 - Product of PID algorithm).

P23 = Power output of the secondarycontrol output (cooling)

Available only when two control outputs areprogrammed. Applied to the control output withdirect action.norL = PID algorithm.cnPL=Complement of the PID algorithm

(100 - Product of PID algorithm).

P24 = Power output displayed for thesecondary control output (cooling)

Available only when two control outputs areprogrammed. Applied to the control output withdirect action.norL = PID algorithm calculated for the

secondary control output.cnPL= Complement of the PID algorithm

calculated for the secondary controloutput (100 - Product of PID algorithm).

Page 20: Barber Colman 7EC

20

P25 = Cooling mediaAvailable only when two control outputs areprogrammed.

AIr = AirOIL = OilH2O = water.

Changing P25 forces the cycle time and relativecooling gain to the default settings of the selectedcooling media. When:

P25 = AIr, CYx = 10 s and rC = 1.00P25 = OIL, CYx = 4 s and rC = 0.80P25 = H2O, CYx = 2 s and rC = 0.40

P26 = Relative cooling gain calculated byautotuning (Smart AT)

Present only when two control outputs areprogrammed.OFF =Autotuning does not calculate rC.ON = Autotuning calculates rC.

P27 = Alarm 1 actionAvailable only when P9 = AL1.P, AL1.b or AL1.d.dir = Direct (relay energized in alarm condition).rEV = Reverse (relay de-energized in alarm

condition).

P28 = Alarm 1 standbyAvailable only when P9 = AL1.P, AL1.b or AL1.d.OFF = Standby function disabled.ON = Standby function enabled.Note: If the alarm is a band or deviation alarm, thealarm is masked after a setpoint change or at start-up until the process variable reaches the alarmsetpoint plus or minus hysteresis. If the alarm is aprocess alarm, the condition is masked at start-up

until the process variable reaches the alarmsetpoint plus or minus hysteresis.

P29 = Alarm 2 actionAvailable only when P12 = AL2.P, AL2.b or AL2.d.dir = Direct (relay energized in alarm condition).rEV = Reverse (relay de-energized in alarm

condition).

P30 = Alarm 2 standbyAvailable only when P12 = AL2.P, AL2.b or AL2.d.OFF = Standby disabled.ON = Standby enabled.

P31 = Alarm 3 actionNot available when P14 = "nonE."dir = Direct (relay energized in alarm condition).rEV = Reverse (relay de-energized in alarm

condition).

P32 = Alarm 3 standbyNot available when P14 = "nonE."OFF = Standby disabled.ON = Standby enabled.

P33 = OFFSET applied to the measured valueUsed to apply a constant OFFSET throughout theentire range (not used for linear inputs).Default = 0.• For readout ranges with a decimal place,

P33 can be programmed from -19.9 to 19.9.• For readout ranges without a decimal place,

P33 can be programmed from -199 to 199.

Page 21: Barber Colman 7EC

21

P34 = Display protected parametersSkipped when P20 = 0.OFF = Protected parameters cannot displayed.ON = Protected parameters can be displayed.

P35 = Autotune (Smart AT)Skipped when no control outputs are configured.0 = Autotuning function disabled.1 = Autotuning enable/disable is NOT protected

by safety lock (password).2 = Autotuning enable/disable is protected by

safety lock (password).

P36 = Maximum value of the proportionalband calculated by Autotuning

Skipped when no control outputs are configuredor P35 = 0. Can be programmed from P37 to200.0%. Default = 30.0.

P37 = Minimum value of the proportionalband calculated by Autotuning

Skipped when no control outputs are configuredor P35 = 0. Can be programmed from 1.0% toP36 value.

P38 = Minimum value of the integral timecalculated by Autotuning

Skipped when no control outputs are configuredor P35 = 0. Can be set with keys from 00.01(mm.ss) to 02.00 (mm.ss). Default = 00.20.

P39 = MANUAL functionSkipped when no control outputs are configured.OFF = Manual function is disabled.ON = Manual function can be enabled/disabled

by MAN key or serial link.

P40 = Device status at instrument start-upSkipped when no control outputs are configuredor P39 = OFF.0 = The instrument starts in AUTO mode.1 =The instrument starts in MANUAL mode with

power output = 0.2 = The instrument starts in the same mode it

was in prior to shutdown (if in MANUALmode the power output is set to zero).

3 = The instrument starts in the same mode itwas in prior to shutdown (if in MANUALmode the power output will be the last valueprior to power shut down).

P41 = Timeout selectionThis parameter sets the duration of the timeout forthe parameter setting used by the instrument duringthe operating mode.tn 10 = 10 secondstn 30 = 30 seconds

Real curveReadout

Adjustedcurve

Input

P33

Page 22: Barber Colman 7EC

22

P42 = Conditions for safety outputSkipped when no control outputs are configured.0 = No safety value (see error messages).1 = Safety value applied for overrange or

underrange condition.2 = Safety value applied for overrange condition.3 = Safety value applied for underrange condition.

P43 = Output safety valueSkipped when no control outputs are configuredor P42 = 0. It can be set:• 0 to 100% when one output selected.• -100 to 100% when two outputs selected.

P44 = Digital filter on the measured valuenoFL.=No filter.FLtr = Filter enabled. A first order digital filter with

a time constant equal to 4 seconds for TCand RTD inputs; 2 seconds for linear inputs.

P45 = Digital filter on the retransmitted valueAvailable only when P5 = Pv.rt.noFL.= No filter.FLtr = Filter enabled. A first order digital filter with

a time constant equal to 4 seconds for TCand RTD inputs; 2 seconds for linear inputs.

P46 = Control action typeSkipped when no control outputs are configured.Pid =Operates with a PID algorithm.Pi = Operates with a PI algorithm.

P47 = Setpoint access0 = Only SP is accessible.1 = Only SP and SP2 are accessible.2 = All 4 setpoints are accessible.

P48 = Anti-Reset-Windup ExtensionRange: -30 to +30% of the proportional band.Note: A positive value increases the high limit ofthe anti-reset-windup (over setpoint); a negativevalue decreases the low limit of the anti-reset-windup (under setpoint). Default = 10.

P49 = Setpoint IndicationFn.SP = During operating mode, when the

instrument performs a ramp, it will showthe final setpoint value.

OP.SP = During operating mode, when theinstrument performs a ramp it will show theoperating setpoint.

P50 = Operating setpoint alignment atinstrument startup

0 = At stat up, the operating setpoint will bealigned to the setpoint selected accordingto the digital input status.

1 = At start up, the operating setpoint will bealigned to the measured value, theselected setpoint will be reached by theprogrammed ramp. See Grd 1 and Grd 2operating paraemters.

If the instrument detects an out of range oran error condition on the measured value,it will operate as described for P50 = 0

This completes the advanced configurationprocedure. The display should show "COnF."

Page 23: Barber Colman 7EC

23

Default Configuration Parameters

The configuration parameters can be loaded withpredetermined default values. These are thesettings loaded into the instrument prior to shipmentfrom the factory. To load the default values proceedas follows:

a) Open switch V1 (see Figure 1, PreliminaryHardware Settings).

b) The upper display will show:

c) Press the t key; the lower display will showthe firmware version.

d) Still holding thet key, press the s key; theinstrument will show:

e) Press the s key to select table 1(European) or table 2 (American) defaultparameters; the display will show:

f) Press the FUNC key; the display will show:

This indicates that the loading procedure has beeninitiated. After about three seconds the procedureis complete and the instrument reverts to the“COnF” display. The following is a list of the defaultconfiguration parameters loaded during theprocedure:

Para . Table 1 Table 2EuropeanAmerican

SEr1 Ero EroSEr2 1 1SEr3 19200 19200SEr4 7E 7EP1 3 21P2 – – – –. – – – –.P3 0 0P4 400 1000P5 rEv rEvP6 0-20 0-20P7 0 0P8 400 1000P9 nonE nonEP10 rEL rEL

Page 24: Barber Colman 7EC

24

P11 H.A. H.A.P12 nonE nonEP13 H.A. H.A.P14 nonE nonEP15 H.A. H.A.P16 OPrt OPrtP17 0 0P18 0.1 0.1P19 0 0P20 0 0P21 norL norLP22 norL norLP23 norL norLP24 norL norLP25 Air AirP26 OFF OFFP27 rEv rEvP28 OFF OFFP29 rEv rEvP30 OFF OFFP31 rEv rEvP32 OFF OFFP33 0 0P34 ON ONP35 2 2P36 30.0 30.0P37 1.0 1.0P38 00.20 00.20P39 ON ONP40 0 0P41 10 30P42 0 0

Default Configuration Parameters (continued)Para . Table 1 Table 2

Default Configuration Parameters (continued)Para . Table 1 Table 2P43 0.0 0.0P44 nOFL. nOFL.P45 nOFL. nOFL.P46 Pid PidP47 0 0P48 10 10P49 Fn.Sp Fn.SpP50 0 0

Page 25: Barber Colman 7EC

25

OPERATING MODE1) Remove the instrument from its case.2) Close switch V1 (see Figure 1, preliminary

hardware settings).3) Re-insert the instrument in its case.4) Switch on power to the instrument.

Display FunctionIn normal display mode, the upper display shows themeasured value while the lower display shows theprogrammed setpoint. When the rate of change(Grd1, Grd2) is used, the displayed setpoint may bedifferent from the operating setpoint. It is possible tochange the lower display as follows:• Press and hold the FUNC key for more than

three seconds, but less than ten. The lowerdisplay will show " r. " followed by the outputconfigured as "rEv" (from 0.0 to 100.0%).

• Press the FUNC key again. The lower displaywill show "d." followed by the output configuredas "dir" (from 0.0 to 100.0%). The graphicsymbol " . " means 100.0%.

• Press the FUNC key again. The display willreturn to the normal display mode.

The information will appear only if the respec-tive function is configured.

If no keys are pressed within the timeout period (seeP41), the display will automatically return to the normaldisplay mode. In order to keep the desired informationcontinuously on the lower display, press the s or tkey to stop the timeout. To return to the normal displaymode, press the FUNC key again.

Setpoint SelectionThis instrument has four setpoints (SP, SP2, SP3 andSP4). By setting P47 parameter it is possible to limitthe number of available setpoints. Setpoint selectionis possible only by logic inputs 1 and 2 (terminals 6, 7and 8).

Logic Input 1 Logic Input 2 Op. Setpointopen (6 - 7) open (6 - 8) SPopen (6 - 7) closed (6 - 8) SP2closed (6 - 7) open (6 - 8) SP3closed (6 - 7) closed (6 - 8) SP4

Indicators°C Lit when the process variable is shown in

degrees Celsius.°F Lit when the process variable is shown in

degrees Fahrenheit.AT Flashes during autotuning (Smart AT).

Lit steadily when autotuning is active.OUT1 Flashes proportionally with Output 1.OUT2 Lit when Output 2 is ON or Alarm 1 is in

the alarm state.OUT3 Lit when Output 3 is ON or Alarm 2 is in

the alarm state.OUT4 Lit when the Alarm 3 is in alarm condition.RMT Lit when the instrument is in REMOTE

condition (functions and parameters arecontrolled via serial link).

SPX Lit when SP2, SP3 or SP4 are used.Flashes when a setpoint from serial link isused.

MAN Lit when the instrument is in MANUALmode.

Page 26: Barber Colman 7EC

26

Operating Key FunctionsFUNC = When the instrument is in normal

display mode:• press less than three seconds to

start parameter modificationprocedure

• press for three to ten seconds tochange the indication on the lowerdisplay

• press longer than ten seconds tostart the lamp test. See "LampTest."

FUNC = When the instrument is in theparameter modification mode, itmemorizes the new parameter valueand advances to the next parameter.

MAN = In normal display mode, allows you toenable/disable the manual function.

MAN = During parameter modification,scrolls back through the parameterswithout storing the new setting.

= During parameter modification,increases the setting of the selectedparameter.

= During manual mode, increases theoutput value.

= During parameter modification,decreases the setting of the selectedparameter.

= During manual mode, decreases theouptut value.

Note: A 10 or 30 second timeout (see P41) canbe selected for parameter modification. If nokeys are pressed during this time period, the

instrument goes automatically to the normaldisplay mode and the last parameter is notchanged.

Enable/Disable Control OutputsWith the instrument in the normal display mode,press and hold (for 5 seconds) the key andthe FUNC key in order to disable the controloutputs. The device will then function as anindicator. All control outputs will be OFF and theword OFF will be shown in the lower display (theactual output is controlled by P21 and P23 ).Alarms will be in a “non-alarm” condition. Thealarm output conditions depend on the alarmaction type (see P27-P29-P31).

Hold (for 5 seconds) the key and the FUNCkey a second time to restore the control status.If the alarm standby function has beenconfigured, the alarms will be activated.Enabling/disabling status will not be lost at powerdown.

Manual FunctionThe MANUAL mode can be accessed (if P39 =On) by pressing the MAN key for one second.The command is accepted and executed only ifthe instrument is in the normal display mode.When in the MANUAL mode, the MAN LED is litand the lower display shows the power outputvalues. The value of the "rEv" output is shownby the two most significant digits while the valueof the "dir" output is shown by the two leastsignificant digits. The decimal point between thetwo values will be flashing to indicate theinstrument is in the MANUAL mode.

Page 27: Barber Colman 7EC

27

NOTE: “ ” is used for "rEv" out = 100“ ” is used for "dir" out = 100

When in manual mode the output resolution isequal to 1%. The power output can be modifiedby using the and keys. Press and hold (for 2seconds) the MAN key again to return the deviceto the AUTO mode.

The transfer from AUTO to MANUAL and backis bumpless (this function is not provided if theintegral action is excluded). If the transfer fromAUTO to MANUAL occurs during the first part ofthe autotuning (Smart AT) algorithm (TUNE),turning back ot AUTO, the instrument will beautomatically forced in the second part of theautotuning algorithm (ADAPTIVE). At power-upthe device will be in the status defined by P40.

When start-up occurs in manual mode withpower output set to 0, the control outputs will bein accordance with the following formula: "rEV"output - "dir" output = 0.

Setpoint AccessWhen the instrument is in the AUTO mode andin the normal display mode, it is possible todirectly access the selected setpoint (SP, SP2,SP3, or SP4). Press the or key (and holdfor two seconds); the setpoint will change. Oncethe desired setting is reached, wait two secondsbefore pressing a key and the new setpoint willbe used.

Serial LinkThis instrument can be connected to a hostcomputer by a serial link. The host computercan put the device in either LOCAL (functionsand parameters are controlled by the keys) orREMOTE (functions and parameters arecontrolled by serial link). REMOTE is signalledby the LED labeled REM.

It is also possible to download the deviceconfiguration through the serial link with thefollowing steps:1) Serial parameters SEr1 thru SEr4 must be

properly configured from the keys.2) The device must be in the OPERATING mode.

During downloading of the configuration, the devicegoes into open loop control with all outputs in the OFFstate. At the end of the configuration procedure, thedevice performs an automatic reset and returns toclosed loop control.

Autotuning (Smart AT)Autotuning is used to automatically optimize thecontrol action. To enable autotuning, press theFUNC key until “Snrt” is shown. Press the s ort key to set the display to “On” and then pressthe FUNC key. The AT LED will turn on or beginflashing according to the selected algorithm.When autotuning is enabled, the controlparameters can be displayed but not modified.

To disable autotuning, press the FUNC key until“Snrt” is shown. Press the s or t key to set thedisplay to “OFF” and press the FUNC key again.

Page 28: Barber Colman 7EC

28

The AT LED will turn off. The instrumentmaintains the calculated control parameters, butallows the parameters to be modified.

Notes:1) Autotuning is disabled when:

a) ON/OFF control is programmed.b) The instrument is in manual mode.c) P35 = 0.

2) Autotuning enable/disable can beprotected by a safety key password (seeP35).

Lamp TestTo test the LEDs, press the FUNC key for morethan ten seconds. This instrument will turn on,with a 50% duty cycle, all LEDs.

No time out is applied to the lamp test. To returnto normal display mode, press the FUNC keyagain.

During the lamp test, the instrument continuesto control the process, but no keyboard functionis available, except the FUNC key.

Operating ParametersFrom the normal operating mode, press the FUNCkey. The lower display will show the code while theupper display shows the setting or the status (ON orOFF) of the selected parameter.

Press the or key to change the setting. Press theFUNC key again and the instrument stores the new

setting and goes to the next parameter. Some of thefollowing parameters may not appear, depending onthe configuration.

Param. DescriptionSP Main setpoint (in engineering units). SP is

operative when logic inputs 1 and 2 areopen. Range from rL to rH.

Snrt Autotuning (Smart AT) status. ON or OFFindicates the status of the autotuningfunction (enabled or disabledrespectively).Set ON to enable autotuning.Set OFF to disable autotuning.

n.RSt Manual reset of the alarms. Set to ONand press FUNC to reset the alarms. Thisparameter is skipped if none of the alarmshas manual reset function.

SP2 Auxiliary setpoint (in engineering units).Operative when logic input 1 is open, logicinput 2 is closed, and P47 is different from0. Range from rL to rH.

SP3 Auxiliary setpoint (in engineering units).Operative when logic input 1 is closed,logic input 2 is open, and P47 =2. Rangefrom rL to rH.

SP4 Auxiliary setpoint (in engineering units).Operative when logic input 1 is closed,logic input 2 is closed, and P47 = 2.Range from rL to rH.

nnn Software key for parameter protection.Skipped if P20 = 0 or 1.ON = The instrument is LOCKED.OFF =The instrument is UNLOCKED.To switch from LOCKED to UNLOCKED,

Page 29: Barber Colman 7EC

29

enter the P20 parameter setting. Toswitch from UNLOCKED to LOCKED,enter any number other than the P20parameter setting.

AL1 Alarm 1 setpoint (in engineering units).This parameter is available only if P9 =AL1.P, AL1.b, or AL1.d. Ranges: spanlimits for process alarms; 0 to 500 units forband alarm; -500 to 500 units for deviatioalarm.

HSA1 Alarm 1 hysteresis.This parameter is available only if P9 =AL1.P, AL1.b, or AL1.d. Ranges: 0.1% to10.0% of the input span or 1 LSD.

AL2 Alarm 2 setpoint (in engineering units).This parameter is available only if P9 =AL1.P, AL1.b, or AL1.d. Ranges: spanlimits for process alarms; 0 to 500 units forband alarm; -500 to 500 units for deviationalarm.

HSA2 Alarm 2 hysteresis (in % of P4 - P3 span).This parameter is available only if P9 =AL1.P, AL1.b, or AL1.d. Ranges: 0.1% to10.0% of the input span or 1 LSD.

AL3 Alarm 3 setpoint (in engineering units).This parameter is available only if P9 =AL1.P, AL1.b, or AL1.d. Ranges: spanlimits for process alarms; 0 to 500 units forband alarm; -500 to 500 units for deviationalarm.

HSA3 Alarm 3 hysteresis (in % of P4 - P3 span).This parameter is available only if P9 =AL1.P, AL1.b, or AL1.d. Ranges: 0.1% to10.0% of the input span or 1 LSD.

Pb Proportional band.Range: 1.0% to 200.0% of input span.When Pb parameter is set to zero, controlaction becomes on-off. When instrumentis working with autotuning, Pb value islimited by P36 and P37.

HyS Hysteresis for ON/OFF control actionRange: 0.1% to 10.0% of input span.

ti Integral time.This parameter is skipped if Pb = 0.Range: 00.01 to 20.00 mm.ss. Above thisvalue, the display blanks and the integralaction is excluded. When the instrumentis working with autotuning, the minimumvalue of integral time is limited by P38.

td Derivative time.This parameter is skipped if Pb = 0.Range: 00.00 to 10.0 mm.ss. When thedevice is working in autotuning, the tdvalue is equal to 1/4 of ti value. WhenP46 = Pi, derivative action is alwaysexcluded.

IP Integral pre-load.This parameter is skipped if Pb = 0.Range: 0.0 to 100.0% of output ifinstrument is configured with one controloutput; from -100.0 to 100.0% of theoutput if instrument is configured with twocontrol outputs.

Cy2 Output 2 cycle time.Available only if P9 = rEv or dir. Range: 1to 200 seconds.

Page 30: Barber Colman 7EC

30

Cy3 Output 3 cycle time.Available only if P12 = rEv or dir. Range:1 to 200 seconds.

rC Relative Cooling gain.This parameter is skipped if Pb = 0, orinstrument is configured with one controloutput only. Range: 0.20 to 1.00. Wheninstrument is working with autotuning andP26 = on, rC is limited according toselected cooling media: 0.85 to 1.00 whenP25 = Air; 0.80 to 0.90 when P25 = OIL;0.30 to 0.60 when P25 = H2O.

OLAP Deadband/Overlap between H/C outputs.This parameter is skipped if Pb = 0, orinstrument is configured with one controloutput only. A negative OLAP valueshows a deadband; a positive valueshows an overlap. Range: -20 to 50% ofthe proportional band.

rL Setpoint low limit (in engineering units).Range: P3 to rH. When P3 is modified, rLwill be realigned to it.

rH Setpoint high limit (in engineering units).Range rL to P4. When P4 is modified,rH will be realigned to it.

Grd1 Ramp applied to an increasingsetpoint change.Range: 1 to 100 digits per minute.Above this value the display shows"InF" meaning that the transfer will bedone as a step change.

Grd2 Ramp applied to an decreasingsetpoint change.Range: 1 to 100 digits per minute.Above this value the display shows

"InF" meaning that the transfer will bedone as a step change.

OLH Output high limit.Range 0.0 to 100% of the outputwhen instrument is configured withone control output; -100.0 to 100%when instrument is configured withtwo control outputs.

tOL Time duration of the output power limiter.Range: 1 to 540 minutes. Above thisvalue the display shows "InF" meaningthat the limiting action is always on. ThetOL can be modified, but the new valuewill become operative only at the nextinstrument start-up.

rnP Control output max. rate of rise.This parameter is available when Pb isdifferent from zero, or one control output islinear. Range: 0.1%/s to 25.0%/s. Above25.0%/s the display shows "InF": meaningthat no ramp limitation is imposed.

Error MessagesOverrange, Underrange and Sensor BreakThis device is capable of detecting process variablefaults (OVERRANGE, UNDERRANGE or SENSORBREAK). When the process variable exceeds thespan limits established by configuration parameterP1, an OVERRANGE condition will appear as:

Page 31: Barber Colman 7EC

31

An UNDERRANGE condition appears as:

When P42 is zero, following conditions may occur. If:• The instrument is set for one output only and

an OVERRANGE is detected, the OUT turnsOFF (if reverse acting) or ON (if direct acting).

• The instrument is set for heating/cooling and anOVERRANGE is detected, the reverse (rEV)acting output turns OFF and the direct (dir)acting output turns ON.

• The instrument is set for one output only andan UNDERRANGE is detected, the OUT turnsON (if reverse acting) or OFF (if direct acting).

• The instrument is set for heating/cooling and anUNDERRANGE is detected, the reverse (rEV)acting output turns ON and the direct (dir)acting output turns OFF.

When P42 is not zero and an out of range condition isdetected, the instrument operates in accordance withP42 and P43 parameters.

The sensor break can be signalled as:• For TC/mV input: OVERRANGE or

UNDERRANGE (solder jumper).• For RTD input: OVERRANGE.• For mA/V input: UNDERRANGE.

On the mA/V input, a sensor break can be detectedonly when the range selected has a zero elevation(4-20 mA, 1-5 V, or 2-10 V). On the RTD input aspecial test is provided to signal an OVERRANGE

when input resistance is less than 15 Ohms (shortcircuit sensor detection).

If the instrument appears to be malfunctioning oroperating in an unexplained manner:1. Load the default configuration parameters.2. Short inputs.3. Remove outputs.4. Move setpoints to reom temperature and

vary the setpoints to see if controller outputresponds in expected manner.

Power UpOn power-up, the instrument performs a self-diagnostic test. When an error is detected, the lowerdisplay shows an “Err” indication while the upperdisplay shows the code of the detected error.

Error listSEr Serial interface parameter error.100 EEPROM write error.150 CPU error.200 Attempt to write to protected memory.201 - 2xx Configuration parameter error. The two

least significant digits show the number ofthe wrong parameter (ex. 209 Errindicates an Error in Parameter P9).

299 Error in control output selection.301 Error in calibration of the selected input.307 RJ input calibration error.320 Linear output calibration error.400 Control parameters error.500 Auto-zero error.502 RJ error.510 Error during calibration procedure.

Page 32: Barber Colman 7EC

32

Dealing with errors:1) When a configuration parameter error is

detected, repeat the configuration procedureof that specific parameter.

2) If an error 400 is detected, simultaneouslypress the s and t keys to load the defaultparameters and then repeat the controlparameter setup.

3) For all other errors, load default configurationparameters. If error persists, contact yoursupplier.

Default Operating ParametersThe control parameters can be loaded withpredetermined default values. These are the settingsloaded into the instrument prior to shipment from thefactory. To load the default values proceed as follows:

a) Close switch V1 (see Figure 1, preliminaryhardware settings).

b) Autotuning (Smart AT) must be disabled.c) The upper display will show the process

variable and the lower display will show thesetpoint.

d) Hold down the t key and press s key; thedisplay will show:

e) Press either the s or t key; the display willshow:

g) Press the FUNC key; the display will show:

This indicates that the loading procedure has beeninitiated. After about three seconds the loadingprocedure is complete and the instrument reverts tothe normal display mode. The following is a list of thedefault operating parameters loaded during theprocedure:

Page 33: Barber Colman 7EC

33

Default Operating Parameter ListParameter Default ValueSP = Minimum of rangeSnRT = Disablen.SRt = OFFSP2, SP3, SP4 = Minimum of rangennn = OFFA1, A2, A3 = Minimum of range (process

alarms). 0 (deviation or band alarms)HSA1, HSA2, HSA3 = 0.1%Pb = 4.0%HyS = 0.5%ti = 4.00 (4 minutes)td = 1.00 (1 minute)IP = 30.0 for one control output;

0 for two control outputsCy2 = 15 seconds for relay output;

4 seconds for SSR outputWhen two control outputs areprogrammed and OUT 2 = "dir" thedefault values will be: 10 seconds forP25 = AIr; 4 seconds for P25 = OIL;2 seconds for P25 = H2O

Cy3 = 15 seconds for relay output. Whentwo control outputs are programmedand OUT 3 = "dir" the default valueswill be: 10 seconds for P25 = AIr; 4seconds for P25 = OIL; 2 seconds forP25 = H2O

rC = 1.00 for P25 = AIr; 0.80 for P25 = OIL;0.40 for P25 = H2O

OLAP = 0rL = Initial scale valuerH = Full scale valueGrd 1 = Infinite (step transfer)Grd 2 = Infinite (step transfer)OLH = 100%tOL= InfiniternP = 25%/second

Page 34: Barber Colman 7EC

34

SPECIFICATIONS

GeneralCase: PC ABS black. Self-extinguishing

degree V-0 according to UL 94.Front Protection: Designed and tested for

IP65 and NEMA 4X for indoor locations withpanel gasket installed.

Installation: Panel mounting by means ofbrackets.

Rear Terminal Block: Up to 21 screwterminals, with connector diagrams andsafety rear cover. (Screw M3, for cables fromø 0.25 to ø 2.5 mm2 or from AWG 22 to AWG14).

Dimensions: 48 x 96 mm (1.890 x 3.780 in.)according to DIN 43700; 116 mm (4.567 in.)deep.

Weight: 450 grams maximum (1 pound).Power Supply: 100 to 240 Vac, 50/60 Hz (-15

to 10% of the nominal value); 24 Vac/dc(±10% of the nominal value).

Power Consumption: 11 VA.Insulation Resistance: Greater than 100

megohms according to IEC 1010-1.Dielectric Strength: 1500 V rms according to

IEC 1010-1.Display Updating Time: 500 ms.Sampling Time: 250 ms for linear inputs; 500

ms for TC and RTD inputs.Resolution: 30000 counts.Accuracy: ±0.2% full scale value @ 25°C

ambient temperature.Common Mode Rejection Ratio:

120 dB @ 50/60 Hz.

Normal Mode Rejection Ratio:60 dB @ 50/60 Hz.

Electromagnetic Compatibility and SafetyRequirements: This instrument is markedCE. Therefore, it is conforming to councildirectives 89/336/EEC (reference harmo-nized standard EN 50081-2 and EN 50082-2) and council directives 73/23/EEC and 93/68/EEC (reference harmonized standard EN61010-1).

Installation Category: IITemperature Drift (CJ excluded):

<200 ppm/ °C of span for mV; and TCranges 1, 3, 5, 7, 20, 21, 22, and 24.<300 ppm/°C of span for mA/V.<400 ppm/°C of span for RTD ranges 11 and28; and TC ranges 0, 2, 4, 6, 23.<500 ppm/°C of span for RTD range 10; andTC ranges 8, 9, 25, 26.<800 ppm/°C of span for RTD range 27.

Operating Temperature: 0 to 50 °C.Storage Temperature: -20 to 70 °C.Humidity: 20 to 85% rh, non-condensing.Protection:

a) WATCHDOG circuit for automaticrestart.

b) DIP Switches for configuration andcalibration parameters.

Page 35: Barber Colman 7EC

35

Inputs

ThermocoupleTypes: L, J, K, T, N, R, S keyboard selectable.Engineering Units: °C, °F keyboard selectable.External Resistance: 100 ý max, max error

0.1% of span.Burn Out: Shown as an overrange condition

(standard). It is possible to obtain anunderrange indication by cut and short.

Reference Junction: Automatic compensationfor an ambient temperature between 0 and50 °C.

Reference Junction Drift: 0.1 °C/°C.Input Impedance: Greater than 1 megohm.Calibration: According to IEC 584-1 and DIN

43710-1977.Standard Ranges

Type Range °C Range °FL 0 0 to 400.0 –L 1 0 to 900 20 0 to 1650J 2 -100 to 400.0 –J 3 -100 to 1000 21-150 to 1830K 4 -100.0 to 400.0 –K 5 -100 to 1370 22-150 to 2500T 6 -199.9 to 400.0 23 -330 to 750N 7 -100 to 1400 24-150 to 2550R 8 0 to 1760 25 0 to 3200S 9 0 to 1760 26 0 to 3200

RTD InputRTD Type: Pt 100 ohms, 3 wire connection.Input Circuit: Current injection.°C/°F Selection: Keyboard or serial link.Calibration: According to DIN 43760.

Line Resistance: Automatic compensation upto 20 ohms/wire with no appreciable error.

Burnout: Instrument detects the opencondition of one or more wires (shown as anoverrange condition). It also detects theshort circuit of sensor (shown as overrangecondition)

Standard Ranges:10 -199.9 to 400.0 °C11 -200 to 800 °C27 -199.9 to 400.0 °F28 -330 to 1470 °F

Linear InputsReadout: Keyboard programmable between

-1999 and 4000.Decimal Point: Programmable in any position.Burnout: Instrument shows burnout as an

• underrange condition for 4 to 20 mA,1 to 5 V, and 2 to 10 V inputs

• underrange or overrange condition(selectable by soldering jumper) for0 to 60 mV and 12 to 60 mV inputs

• no indication is available for 0 to 20 mA,0 to 5 V, and 0 to 10 V inputs.

Accuracy: 0.2% + 1 digit @ 25°C.Impedance: Type

12 0 to 60 mV >1 megohm13 12 to 60 mV >1 megohm14 0 to 20 mA <5 ohms15 4 to 20 mA <5 ohms16 0 to 5 V >200 kilo-ohms17 1 to 5 V >200 kilo-ohms18 0 to 10 V >400 kilo-ohms19 2 to 10 V >400 kilo-ohms

Page 36: Barber Colman 7EC

36

Logic InputsEquipped with two logic inputs from contact forsetpoint selection. Setpoint selection is possibleonly by logic inputs 1 and 2 (terminals 6, 7, 8).

Input 1 Input 2 Operating SetpointOpen (6-7) Open (6-8) SPOpen (6-7) Closed (6-8) SP2Closed (6-7) Open (6-8) SP3Closed (6-7) Closed (6-8) SP4

Setpoints

Four setpoints are available: SP, SP2, SP3,and SP4. Setpoint selection is possible onlyby logic inputs 1 and 2.

Transfer: Between one setpoint and another(or between two different setpoint values)may be realized by a step transfer, or by aramp with two different programmable ratesof change (ramp up and ramp down).

Slope Value: 1 to 100 Eng. Units/min. or step.Limiter: RLO and RHI parameters, program-

mable.

Control Action

Algorithm: PID + Smart AT.Type: One (heating or cooling) or two (heating

and cooling) control outputs.Proportional Band: Configurable from 1.0% to

200.0% of the input span. Setting a PBequal to 0 sets the control action to ON/OFF.

Hysteresis (for ON/OFF control action):Configurable 0.1 to 10.0% of the input span.

Integral Time: Configurable from 1 second to20 minutes, or excluded.

Derivative Time: Configurable from 0 to 10minutes. If 0 is selected, derivative action isexcluded.

Integral Preload: Configurable 0.0 to 100.0%for one control output; -100.0 (cooling) to100.0% (heating) for two control outputs.

AutoTuning: Keyboard enable/disable.Auto/Manual: Keyboard selectable.Auto/Manual Transfer: Bumpless"Man" Indicator: Off in auto mode; lit in manual

mode.

Outputs

Control OutputType: One linear and/or time proportioning.Updating Time: 250 ms for linear inputs;

500 ms for TC and RTD inputs.Output Resolution: 0.1% of span.Direct/Reverse Action: Programmable.Output Level Indication: Output 1 value and

Output 2 value displayed separately.Output Level Limiter: One control medium: 0.0

to 100.0%; two control mediums: -100.0 to100.0%. This function may be operative atinstrument start-up for a programmable timeto avoid thermal shock and/or preheating theplant.

Relative Cooling Gain: Programmable from0.20 to 1.00.

Overlap/Deadband: Programmable from -20%to 50% of the proportional band.

Page 37: Barber Colman 7EC

37

Linear OutputType: Isolated 0 to 20 mA or 4 to 20 mA,

programmable.Maximum Load: 500 ohms.Resolution: 0.1% when used as control output;

0.05% when used as analog retransmission.

Relay OutputsOutput 2: SPST contact with rated current 3A

at 25 Vac on resistive load (NC or NOcontact selectable by soldering jumper).

Output 3: SPST contact with rated current 2 Aat 250 Vac on resistive load.

Output Status Indication: Two indicators (OUT2 and OUT 3) are lit when the respectiveoutput is on.

Cycle Times: Programmable from 1 to 200 s.Logic Voltage for SSR Driver (Output 2 only):

Logic Level 0: V out <0.5 VdcLogic Level 1: 24 Vdc ±20% @ 20 mA.

Maximum current = 20 mA.Note: Out 2 may be programmed to perform

the second control output or the alarm 1output.

Output Status Indication: OUT X lit whenrespective output is on.

Cycle times: Programmable from 1 to 200 s.

Alarms

This instrument is equipped with one analogoutput plus three independent relay outputs (Out4 is optional). The outputs can be programmedas follows:

Out 1 Out 2 Out 3 Out 4mA Relay or SSR Relay RelayHeating AL1 AL2 AL3Heating Cooling AL2 AL3Heating AL1 Cooling AL3Cooling AL1 AL2 AL3Cooling Heating AL2 AL3Cooling AL1 Heating AL3Retrans. Heating AL2 AL3Retrans. AL1 Heating AL3Retrans. Cooling AL2 AL3Retrans. AL1 Cooling AL3Retrans. Heating Cooling AL3Retrans. Cooling Heating AL3Retrans AL1 AL2 AL3

Alarm Reset: Automatic or manual, program-mable on each alarm.

Standby Alarm: Each alarm can be configuredwith our without standby function. Standbyeliminates false indication at instrumentstart-up and after a setpoint change.

Alarm Indications: Three indicators lit whenrespective alarm is on.

Alarm Outputs: Three SPST relays. Contactrated at 2A, 250 Vac on resistive load. Note:side C of OUT 3 and OUT 4 are common.

Process AlarmOperating Mode: High or low programmable.Setpoint: Programmable in engineering units

within input span.Hysteresis: Programmable from 0.1% to 10.0%

of input span (P4 - P3).

Page 38: Barber Colman 7EC

38

Band AlarmOperating Mode: Inside or outside program-

mable.Setpoint: Programmable from 0 to 500 units.Hysteresis: Programmable from 0.1% to 10.0%

of input span.

Deviation AlarmOperating Mode: High or low programmable.Setpoint: Programmable from -500 to 500

units.Hysteresis: Programmable from 0.1% to 10.0%

of input

Options

Serial Communications InterfaceType: RS-485.Protocol Type: MODBUS, JBUS, or

proprietary polling/selecting.Baud Rate: Keyboard configurable from 600 to

19200.Byte Format: 7 or 8 bit configurable.Parity: Even, odd or none configurable.Stop Bit: One.Address: From 1 to 95 for proprietary protocol;

from 1 to 255 for all other protocols.Output Voltage Levels: According to EIA

standard.

Special FunctionsAuxiliary Power Supply

for Two or Four Wire TransmitterType: Not isolated, 24 Vdc.Maximum Current: 25 mA with short circuit

protection.Output Variation: ±10% of nominal value.

Output Turnoff FunctionThis function allows you to set to zero the out-put signal and to inhibit the control algorithm andthe alarm functions in order to remove powerfrom the controlled load and to make the instru-ment operate as an indicator only. Therefore,this function monitors the process variable evenwhen the load is off. When control mode is re-sumed, the instrument will operate as before: theintegral component of the output signal will beset to zero, and the soft start and alarm standbyfunctions will be enable.

Page 39: Barber Colman 7EC

39

CALIBRATION

Calibration parameters are logically divided intogroups of two parameters each – initial scalevalue and final scale value. A calibration checkis provided after entering the values of eachgroup. A calibration check can be initiated with-out making an entry: press the FUNC key toadvance to the desired calibration check. Thelower display will show the parameter code (t.,rJ., etc.) and the upper display will show "on" or"off." Press the s or t key to select on or off.

To go to the next parameter without modifyingthe calibration, press the FUNC key when thedisplays shows "off." To return the previous pa-rameter without modifying the calibration, pressthe MAN key.

To set the parameter calibration, pres the FUNCkey when the display shows "on." The displaywill blank, and only the decimal point of the LSDof the lower display will be lit during the calibra-tion step.

Before beginning calibration, be sure internalswitch V1 is open (see Configuration Procedure,Figure 1).

General Guidelinesa) The instrument should be mounted in its

case in order to keep the internal tempera-ture constant.

b) Ambient temperature should be stable.Avoid drift due to air conditioning or othermechanical devices.

c) Relative humidity should not exceed 70%.d) Minimum warm up time should be at least

20 minutes.e) Operate as much as possible in a noise

free environment.f) During calibration, connect one input at a

time to the rear terminal block.g) Before input calibration, the specific

preliminary hardware settings described inthe Configuration section must be made.

h) Use calibrators with the following:AccuracyCurrent Input:

±0.025% output±0.0025% range±0.01 microamp

Voltage Input:±0.005% output±0.001% range±5 microvolt

TC Input:±0.005% output±0.001% range±5 microvolt

RTD Input:±0.02%±0.0025 ohms/decade

Reference JunctionCompensation:better than 0.1°C

mA output: better than ±0.1% of thereadout ±2 microamp

Page 40: Barber Colman 7EC

40

ResolutionCurrent Input: 0.5 microampVoltage Input: 100 microvoltTC Input: 1 microvoltRTD Input: 10 milliohmRef. Jct. Compensation: better than 0.1°CmA output 1 microamp

Calibration Parameters

Following is a complete list of calibration symbols:Code ParametertL TC/mV Input Minimum Range ValuetH TC/mV Input Maximum Range Valuet. TC/mV Input CheckrJ Reference Junction CompensationrJ. Reference Junction Compensation

CheckPL RTD Input Minimum Range ValuePH RTD Input Maximum Range ValueP. RTD Input ChecknAL Current Input Minimum Range Value

(0 mA)nAH Current Input Maximum Range Value

(20 mA)nA. Current Input Check5UL 5 Volt Input Min. Range Value (0 V)5UH 5 Volt Input Max Range Value (5 V)5U. 5 Volt Input Check10UL 10 Volt Input Minimum Value (0 V)10UH 10 Volt Input Maximum Value (10 V)10U. 10 Volt Input CheckrtL Linear Output Minimum Value (0 mA)rtH Linear Output Max. Value (20 mA)Crt. Linear Output Check

ProcedureSwitch on the instrument; the upper display willshow “COnF”. Press the s key and the displaywill show “CAL”. Press the “FUNC” key to startthe calibration process. Repeatedly press theFUNC key until the desired calibration (parameter)code appears.

Use the s and t keys to select between ON andOFF. To go to the next parameter without modifyingthe calibration, press the FUNC key when thedisplay shows “OFF” .

tL TC/mV input minimum range valuea) Perform the preliminary hardware settings

described in the Configuration section;connect the calibrator and instrument asshown below.

1

3

b) The displays show “OFF” and “tL”.c) Set calibrator to 0.000 mV.d) Press the s key; the display changes to

“ON”.e) After a few seconds, start calibration by

pressing the FUNC key. The decimal pointof the least significant digit will light toindicate the instrument is performing thecalibration. When calibration is complete,the instrument will proceed to the nextparameter.

Page 41: Barber Colman 7EC

41

tH TC/mV input maximum range valuea) Set the calibrator to 60.000 mV.b) Press the s key; the displays will show

“ON” and “tH”.c) After a few seconds, start calibration by

pressing the FUNC key. The decimal pointof the least significant digit will light toindicate the instrument is performing thecalibration. When this calibration iscomplete, the instrument will proceed tothe next parameter.

t. TC/mV input checkThe display will show “t.” followed by a numbershowing the measured value in counts.

Check the linear calibration by setting:a) 0.000 mV; the readout must be equal to

"t.0 0000" ±10 counts.b) 60.000 mV; the readout must be equal to

"t.3 0000" ±10 counts.c) 30.000 mV; the readout must be equal to

"t.1.5000" ±10 counts.d) Press the FUNC key; go to the next

parameter.

rJ Reference junction compensationNote: Make sure tL and tH are correctlycalibrated before attempting rJ calibration.a) Measure the temperature close to

terminals 1 and 3 using an appropriateinstrument, as shown below.

1

3

M ea su ring D ev ice

+

-

b) Wait a few minutes to allow temperaturestabilization of the entire system(compensation cable, sensor, calibratorand instrument).

c) The displays will show "rJ" and "OFF."Use the s and t keys to make thereadout value equal to the temperaturemeasured by the measuring device intenths of °C.

d) After a few seconds, start calibration bypressing the FUNC key. The decimal pointof the least significant digit will light toindicate the instrument is performing thecalibration. When this calibration iscomplete, the instrument will proceed tothe next parameter.

rJ. Reference junction compensationcheck

The display will show “rJ.” and the temperaturein tenths of °C. Check that the display readoutis equal to the value read by the measuringdevice.

Press the FUNC key; the instrument will proceedto the next parameter.

Page 42: Barber Colman 7EC

42

PL RTD input minimum range valuea) Perform the preliminary hardware settings

described in the Configuration section.Connect the calibrator and instrument asshown below.

1

4

3

b) Set 0.00 ohms on the resistor box.c) Press the s key; the displays show “ON”

and “PL”.d) After a few seconds, start calibration by

pressing the FUNC key. The decimal pointof the least significant digit will light toindicate the instrument is performing thecalibration. When this calibration iscomplete, the instrument will proceed tothe next parameter.

PH RTD input maximum range valuea) Set resistor box to 375.00 ohms.b) Press the s key; the displays will show

“ON” and “PH”.c) After a few seconds, start calibration by

pressing the FUNC key. The decimal pointof the least significant digit will light toindicate the instrument is performing thecalibration. When this calibration iscomplete, the instrument will proceed tothe next parameter.

P. RTD input checkThe display shows “P.” followed by a numbershowing the measured value in counts.

Check the calibration (not linear) by setting theresistance box to:a) 0.00 ohms; the readout should be

“P. 0 0000” ±10 counts.b) 125.00 ohms; the readout should be

"P.1 0190" ±10 counts.c) 250.00 ohms; readout should be

"P. 2 0189" ±10 counts.d) 375.00 ohms; readout should be

"P. 3 0000" ±10 counts.e) Press the FUNC key and proceed to next

parameter.

nAL Current input (mA) minimum rangevalue

a) Perform the preliminary hardware settingsdescribed in the Configuration section;connect the calibrator and instrument asshown:

1

3

b) Set 0.000 mA on the calibrator (even if theminimum range value is 4 mA). The upperdisplay shows "OFF."

Page 43: Barber Colman 7EC

43

c) Press the s key, the display will switch to"ON".

d) After a few seconds, start calibration bypressing the FUNC key. The decimalpoint of the least significant digit will lightto indicate the instrument is performingthe calibration. When this calibration iscomplete, the instrument will proceed tothe next parameter.

nAH Current input (mA) maximum rangevalue

a) Set 20 mA on the calibrator.b) Press the s key, the displays will show

"nAH" and "ON".c) After a few seconds, start calibration by

pressing the FUNC key. The decimal pointof the least significant digit will light toindicate the instrument is performing thecalibration. When this calibration iscomplete, the instrument will proceed tothe next parameter.

nA. Current input (mA) checkThe display will show "nA." followed by a numbershowing the measured value in counts.

Check the linear calibration by setting the cali-brator to:a) 0.000 mA; the readout should be

“nA. 0 0000” ±10 counts.

b) 20.000 mA; readout should be"nA. 3 0000" ±10 counts.

c) 10.000 mA; readout should be"nA. 1 5000" ± 10 counts.

d) Press the FUNC key.

5UL 5 volt input-minimum range valuea) Perform the preliminary hardware settings

described in the Configuration section.Connect the calibrator and instrument asshown:

1

3

b) Set 0.000 V on the calibrator (even if theminimum range value is 1 V). The upperdisplay will show "OFF."

c) Press the s key, the display will show"5UL" and "ON."

d) After a few seconds, start calibration bypressing the FUNC key. The decimal pointof the least significant digit will light toindicate the instrument is performing thecalibration. When this calibration iscomplete, the instrument will proceed tothe next parameter.

5UH 5 volt input-maximum range valuea) Set 5.000 V on the calibrator.b) Press the s key, the display will show

"5UH" and "ON".

Page 44: Barber Colman 7EC

44

c) After a few seconds, start calibration bypressing the FUNC key. The decimalpoint of the least significant digit will lightto indicate the instrument is performingthe calibration. When this calibration iscomplete, the instrument will proceed tothe next parameter

5U.5 volt input checkThe display will show "5U." followed by a numbershowing the measured value in counts.

Check the calibration by setting the calibrator to:a) 0.000 V; the readout should be

“5U. 0 0000” ±10 counts.b) 5.000 V; readout should be

"5U. 3 0000" ±10 counts.c) 2.500 V; readout should be

"5U. 1 5000" ± 10 counts.d) Press the FUNC key to proceed to next

parameter.

10UL 10 volt input - minimum range valuea) Perform preliminary hardware settings as

described in the Configuration section.Connect the instrument to the calibrator asshown:

1

3

b) Set 0.000 V on the calibrator (even if theminimum range value is 2 V). The upperdisplay will show "OFF".

c) Press the s key to enable calibration.The upper display will switch to "ON".

d) Wait a few seconds until the measurementhas stabilized, then push the FUNC key.When calibration is complete, theinstrument will go to the next parameter.

10UH 10 volt input-maximum range valuea) Set 10.000 V on the calibrator.b) Press the s key, the display will show

"10UH" and "ON".c) After a few seconds, start calibration by

pressing the FUNC key. The decimal pointof the least significant digit will light toindicate the instrument is performing thecalibration. When this calibration iscomplete, the instrument will proceed tothe next parameter

10U. 10 volt input checkThe display will show "10U." followed by anumber showing the measured value in counts.

Page 45: Barber Colman 7EC

45

Check the calibration (linear) by setting the cali-brator to:a) 0.000 V; the readout should be

“10U.0 0000” ±10 counts.b) 10.000 V; readout should be

"10U.3 0000" ±10 counts.c) 5.000 V; readout should be

"10U.1 5000" ±10 counts.d) Press the FUNC key.

rt.L Linear output - minimum range valuea) Connect the calibrator and instrument as

shown below.

14

15

M e asu ring D evic e

b) The display will show a number of counts(from 0 to 2500) and "rt.L".

c) Press the s or t key to make themeasuring device read 0.000 mA ±5microamps.

d) After a few seconds, press the FUNC key.The instrument will proceed to the nextparameter.

rt.H Linear output-maximum range valuea) The display will show a number of counts

(from 3644 to 6144) and "rt.H".b) Press the s or t key to make the

measuring device read 20.000 mA ±5microamps.

c) After a few seconds, press the FUNC key.The instrument will proceed to the nextparameter.

Crt. Linear output checkThe display will show "C. rt." preceded by anumber (from 0 to 4000) showing the generatedvalue in counts.

Check the calibration by pressing the s or tkey and set:a) 0 counts; the measured value should be

equal to 0 mAb) 4000 counts; the measured value should

be equal to 20 mA.c) 2000 counts; the measured value should

be equal to 10 mA.d) For other check, the ratio between counts

and output values is shown by the formula:Output = readout ÷ 4000 x 20

e) Press the FUNC key.

This completes the calibration procedure. Toenter the configuration procedure press the skey, the display will show “CnF”. If configurationand calibration are complete, switch theinstrument off and set the DIP switches accordingto the Configuration section.

Page 46: Barber Colman 7EC

46

MAINTENANCE

1. Remove power from the power supplyterminals and from relay output terminals.

2. Remove the instrument from case.3. Using a vacuum cleaner or a compressed

air jet (max. 3kg/cm2) remove dust and dirtwhich may be present on the louvers andon the internal circuits, being careful to notdamage the electronic components.

4. Clean external plastic or rubber parts onlywith a cloth moistened with ethyl alcohol(pure or denatured) [C2H5OH]; or isopropylalcohol (pure or denatured) [(CH3)2CHOH];or water [H2O]

5. Verify that there are no loose terminals.6. Before re-inserting the instrument in its

case, be sure it is perfectly dry.7. Re-insert the instrument and turn it ON.

Page 47: Barber Colman 7EC

47

Page 48: Barber Colman 7EC

Barber-Colman CompanyIndustrial Instruments Division1354 Clifford AvenueP.O. Box 2940Loves Park, IL U.S.A. 61132-2940

Telephone +1 800 232 4343Facsimile +1 815 637 5341http://www.barber-colman.com

A Siebe Group Company Copyright © 1997 Barber-Colman Company.