Hach-Lange SI794 I User Manual

DOC023.52.90116

si794 I

Inductive Conductivity

4-Wire Transmitters

USER MANUAL

October 2008, Edition 1

© HACH LANGE GmbH, 2008. All rights reserved.
Printed in Germany.

Return of products under warranty

Please contact our Service Team before returning a defective device.
Ship the cleaned device to the address you have been given. If the device
has been in contact with process fluids, it must be decontaminated/
disinfected before shipment. In that case, please attach a corresponding
certificate, for the health and safety of our service personnel.

Disposal

Please observe the applicable local or national regulations concerning
the disposal of “waste electrical and electronic equipment”.

Table of contents

Intended use ...........................................5

Safety information ......................................6

Overview of si794 I.....................................11

Assembly..............................................12

Package contents........................................12

Mounting plan ..........................................13

Pipe mounting, panel mounting .........................14

Installation and connection.............................16

Installation instructions ..................................16

Terminal assignments....................................16

Wiring examples.........................................18

Protective wiring of relay outputs ........................22

Interface and navigation .................................24

si794 user interface ......................................24

si794 display.............................................25

Operation: Keypad.....................................26

Safety functions .......................................27

Sensocheck, Sensoface sensor monitoring ...............27

GainCheck device self-test ...............................27

Automatic device self-test ...............................27

Hold mode .............................................28

External activation of HOLD mode .......................29

Overview of configuration steps ........................30

Output 1 ................................................36

Output 2 ................................................52

Temperature compensation..............................58

Alarm settings ...........................................60

Limit function ...........................................62

Controller ...............................................66

Control of rinsing probe / Signaling parameter set........68

Selecting parameter set 1/2 ..............................70

3

External switchover of parameter sets ....................71

Parameter set, individual settings (original for copy) . . . . . . 74

Calibration by entry of cell factor............................78

Calibration with calibration solution......................80

Product calibration ......................................82

Zero calibration in air ....................................84

Zero calibration with calibration solution .................86

Temp probe adjustment .................................88

Diagnostics functions ..................................89

Display of output currents ...............................89

Display of calibration data ...............................89

Sensor monitor for validation ............................89

Display of last error message .............................89

Specify current at output 1 (current source 1).............90

Specify current at output 2 (current source 2).............90

Relay test (manual test of contacts) ......................90

Controller test (manual specification of controller output) 91

Controller functions....................................92

PID controller............................................92

Pulse length / pulse frequency controller.................94

Error messages (error codes)............................96

Operating states.........................................98

Sensoface ..............................................100

Specifications ........................................104

Calibration solutions....................................110

Concentration curves ...................................112

Contact information ....................................118

Limited warranty .......................................120

Index...................................................122

Passcodes ..............................................128

4

Intended use

The si794 I transmitter is used for measurement of electrical con­ductivity and temperature in liquids using electrodeless sensors.
Fields of application are: biotechnology, chemical industry,
environment, food processing, water/waste-water treatment.

The sturdy molded enclosure can be attached to a panel, wall,
post or pipe railing. The optional hood provides protection
against direct weather exposure and mechanical damage. The
transmitter has been designed for application with electrode­less sensors. It provides a second current output for temperature
measurement, a PID controller (making use of the relay contacts),
and a universal power supply for 24 ... 230 V AC/DC.
For CIP applications, you can switch between two parameter sets.

5

Safety information

Be sure to read and observe the following!

The device has been manufactured using state of the art technology
and it complies with applicable safety regulations.
When operating the device, certain conditions may neverthe­less lead to danger for the operator or damage to the equipment.
Therefore, please read this entire manual before unpacking, setting
up, or operating this equipment. Pay particular attention to all
danger and caution statements.

Precautionary labels

Read all labels and tags attached to the instrument. Personal injury
or damage to the instrument could occur if not observed.
A symbol, if noted on the instrument, will be included with a danger
or caution statement in the manual.

This symbol, if noted on the device, references
the instruction manual for operation and/or safety
information.

This symbol, when noted on a product enclosure or
barrier, indicates that a risk of electric shock and/or
electrocution exists.

This symbol, when noted on the product, identifies
the location of a fuse or current limiting device.

This symbol, when noted on the product, identifies
the location of the connection for Protective Earth
(ground).

6

This symbol, when noted on the product, identifies
a risk of chemical harm and indicates that only indi­viduals qualified and trained to work with chemicals
should handle chemicals or perform maintenance
on chemical delivery systems associated with the
equipment.

This symbol, when noted on the product, identi­fies the presence of a noxious substance and a
risk of chemical harm. Only individuals qualified
and trained to work with chemicals should handle
chemicals or perform maintenance on chemical
delivery systems associated with the equipment.

This symbol, when noted on the product, indicates
the presence of devices sensitive to electrostatic
discharge (ESD) and indicates that care must be
taken to prevent damage with the equipment.

Electrical equipment marked with this symbol may
not be disposed of in European public disposal
systems after 12 August of 2005. In conformity with
European local and national regulations (EU Directive
2002/96/EC), European electrical equipment users
must now return old or end-of life equipment to the
Producer for disposal at no charge to the user.

Note:

You can obtain instructions on the correct disposal
of all (marked and unmarked) electrical products
that have been supplied or manufactured by Hach­Lange from your local Hach-Lange sales office.

7

Signal words for hazard information

This manual uses signal words to mark safety information.
They are used alone or in combination with a safety symbol.
If multiple hazards exist, this manual will use the signal word
(Danger, Caution, Note) corresponding to the greatest hazard.

DANGER Indicates a potentially or imminently

hazardous situation which, if not avoided,
could result in death or serious injury.

CAUTION Indicates a potentially hazardous situa-

tion that may result in minor or moderate
injury.

Important Note Information that requires special

emphasis.

Note Information that supplements points in

the main text.

8

General safety information

Do not use or install the si794 transmitter in any manner other
than that which is specified in this manual.

Important Note

Commissioning must only be carried out by trained person­nel. Whenever it is likely that protection has been impaired, the
device shall be made inoperative and secured against unintended
operation.
The safety of the transmitter may be impaired if any of the
following conditions have occurred:

visible damage•
failure to operate properly•
storage above 70 °C for prolonged periods•
exposure to severe transport stresses•

If any of these conditions have occurred, return the device to the
manufacturer for recertification.

Note

Before commissioning it must be proved that the transmitter may
be connected with other equipment.

Important Note

Working with chemical samples, standards, reagents, and waste
presents potential hazards.
The device must only be operated by trained personnel authorized
by the operating company.
The manufacturer is not liable for any damages caused by process­related risks known to the operating company.

9

Information on how to prevent electrostatic discharges (ESD)

Important Note

The sensitive electronic components in the device can be damaged
by static electricity. This can impair device performance and even
lead to a complete failure of the device.
Before connecting a sensor, for example, you should discharge any
static electricity buildup from your body. To do so, you can touch an
earth-grounded metal surface such as the chassis of a device or a
metal conduit or pipe.

10

Overview of si794 I

receive hi

receive lo

drain

send lo

send hi

shield

RTD

RTD

hold

hold/
control

control

1

CondI
input

Output 1

2

3

4

Output 2

R1

5

R2

9

10

11

12

13

14

+ output 1

- output 1/2

+ output 2

relay 1

relay 1/2

relay 2

C

Temp

D

input

Alarm

E

Clean

6

7

8

HOLD

input

Control

input

PSet2

Power

15

16

17

18

19

20

alarm

alarm

clean
Pset2

clean
PSet2

power

power

11

Assembly

11

10

9

8

76 5

4

1

2

3

Package contents

Check the shipment for transport damage and completeness.
The package should contain:

• Front unit

• Rear unit

• Bag containing small parts

• User manual

• Specific test report

1 Jumper (2 x)
2 Washer (1 x), for conduit

mounting: Place washer between

enclosure and nut
3 Cable tie (3 x)
4 Hinge pin (1 x), insertable from

either side
5 Enclosure screw (4 x)

Fig.: Assembling the enclosure

12

6 Sealing insert (1 x)
7 Rubber reducer (1 x)
8 Strain relief (3 x)
9 Filler plug (3 x)
10 Hex nut (5 x)
11 Sealing plug (2 x),

for sealing in case of wall mounting

Mounting plan

144

144

15

42

84

80

32

21

43

105

27

72

6,2

12

3

4

Fig.: Mounting plan – All dimensions in mm!

1 Strain relief (3 x)
2 Strain relief or 1/2“ conduit

opening, ø 21.5 mm (2 x)
Conduit hardware not included!
3 Knockout for pipe mounting
(4 x )
4 Knockout for wall mounting
(2 x )

13

40 60

132

1

2

3
4

5

1

132165

173

1

Pipe mounting, panel mounting

1 Protective hood (LZY485) - if required

2 Hose clamp with worm gear drive to DIN 3017 (2 x)
3 Pipe-mount plate (1 x)
4 For vertical or horizontal posts or pipes
5 Self-tapping screw (4 x)

Fig.: Bracket kit (LZY483) – All dimensions in mm!

Fig.: LZY485 protective hood for wall and pipe mounting

– All dimensions in mm!

14

1

2

3

45

max. 25

78 27

1...22

1 Screw (4 x)
2 Gasket (1 x)
3 Control panel
4 Span piece (4 x)
5 Threaded sleeve (4 x)

Fig.: Panel mounting kit (LZY484) – All dimensions in mm!

15

Installation and connection

Installation instructions

Caution!

Any work on the electrical installation may only be undertaken by
experienced and qualified personnel in accordance with the applicable
local safety regulations.

• Always disconnect power to the device when making any electrical

connections!

• Be sure to follow the instructions in the user manual!

• Only connect the power supply when all internal wirings have been

completed and the system is correctly grounded!
When using an external voltage supply, always connect a ground-fault
circuit interrupter (tripping current max. 30 mA) between mains and
controller system! A ground-fault circuit interrupter is not required
when safety extra-low voltages (24 V DC supply via rechargeable
batteries or 24 V DC/AC supply through an isolation transformer)!
When operating the system outdoors, connect a surge voltage
protection between mains and controller system!
The terminals are suitable for single wires and flexible leads up to

2.5 mm² (AWG 14). Attach end ferrules to the leads.

Terminal assignments

Danger of electric shock!

Fig.: si794 I terminal assignments

16

3

2

1 Terminals for temperature probe and outer shield
2 Terminals for sensor
3 Terminals for power supply

1

Fig.: Information on installation, rear side of device

17

Wiring example 1

Polymetron 8398 series sensors

8398.2

8398.3

8398.5

si794 I

receive hi

receive lo

drain

send lo

send hi

Jumper!

Black

Brown

Black

White

Caution!

Place jumper across terminals 3 and 4!

18

shield

White

RTD

Green

RTD

Yellow

Wiring example 2

Siemens 2200 series sensors
7MA2200-8DA
7MA2200 8CB
7MA2200 8BF

si794 I

receive hi

receive lo

drain

send lo

send hi

Jumper!

Yellow

Violet

Blue

White

Brown

Green

Caution!

Place jumper across terminals 3 and 4!

shield

Black

RTD

RTD

Gray

Red

Pink

19

Wiring example 3

GLI 3700 series sensor

si794 I

receive hi

receive lo

drain

send lo

send hi

Jumper!

Yellow

White

Blue

Green

Caution!

Place jumper across terminals 3 and 4!

20

shield

Shield

RTD

RTD

Red

21

1

2

3

1

2

3

Protective wiring of relay outputs

Protective wiring of relay contacts

Relay contacts are subject to electrical erosion. Especially with
inductive and capacitive loads, the service life of the contacts will
be reduced. For suppression of sparks and arcing, components
such as RC combinations, nonlinear resistors, series resistors, and
diodes should be used.

Typical AC applications
with inductive load

1 Load
2 RC combination, e.g. RIFA PMR 209
Typical RC combinations
for 230 V AC:
Capacitor 0.1µF / 630V,
Resistor 100 ohms / 1 W
3 Contact

22

Typical protective wiring measures

A: DC application with inductive load
B: AC/DC applications with capacitive load
C: Connection of incandescent lamps

A1 Inductive load
A2 Free-wheeling diode, e.g. 1N4007 (Observe polarity)
A3 Contact

B1 Capacitive load
B2 Resistor, e.g. 8 Ω / 1 W at 24 V / 0.3 A
B3 Contact

C1 Incandescent lamp, max 60 W / 230 V, 30 W / 115 V
C3 Contact

Warning!
Make sure that the maximum ratings of the relay contacts are
not exceeded even during switching!

23

Interface and navigation

The si794 transmitter user interface contains a display, indicators,
and keys for navigation and menu selection.

User interface

Use the arrow and enter keys to scroll through the menu and
change settings. Use the indicators to identify which mode the
transmitter is in.

6

5

4

3

2

1

Fig.: si794 user interface

1 Calibration key 7 Wash mode indicator

2 Congure key 8 Conguration mode indicator

3 Measure mode indicator 9 Up arrow key

4 Calibration mode indicator 10 Right arrow key

5 Alarm indication

6 Display

11 Enter key

7

8

9

10

11

24

Display

Interface and navigation

4.3 Display

Figure 11 identifies all of the possible icons and symbols that may be

seen in the si792 transmitter display.

The gure below identies all of the possible icons and symbols
that may be seen in the si794 transmitter display.

Fig.: si794 display

1 Passcode 13 Secondary display
2 Temperature 14 Alarm mode
3 4–20 mA/HART output 15 Manual temperature on
4 Limit values 16 Calibration mode
5 Alarm 17 Hold mode active
6 Sensocheck: Sensor error 18 Hourglass (waiting indication)
7 Calibration active 19 Measure mode active
8 Calibration interval 20 Calibration complete

8 Parameter display 21 Calibration: zero or rst point
10 Enter prompt 22 Calibration: second point
11 Conguration mode
12 Main display

23 Sensofaces

25

Operation: Keypad

Start, end calibration

Start, end configuration

Select digit position
(selected position blinks)

Edit digit

• Calibration:

Continue in program sequence

• Configuration: Confirm entries,

next configuration step

• Measuring mode: Display output current

Cal Info: Display of cell factor and zero point

Error Info: Display of last error message

26

+

Start GainCheck device self-test

Safety functions

Sensocheck, Sensoface sensor monitoring

Sensocheck continuously monitors the sensor and its wiring.
Sensocheck can be switched o (Conguration).

Sensoface provides information on the conductiv­ity sensor condition. The primary coil and its lines are
continuously monitored for short circuits, the secondary
coil and its lines are checked for open circuits. The three
Sensoface indicators provide information on the sensor
condition.

GainCheck device self-test

A display test is carried out, the software version is displayed, and
the memory and signal transfer are checked.

Start GainCheck device self-test:

Automatic device self-test

The automatic device self-test checks the memory and signal
transfer. It runs automatically in the background at xed intervals.

+

27

Safety functions

Hold mode

Display:

The Hold mode is a safety state during conguration and calibra­tion. Output current is frozen (Last) or set to a xed value (Fix).
Alarm and limit contacts are disabled.
If the calibration or conguration mode is exited, the transmitter
remains in the Hold mode for safety reasons. This prevents un­desirable reactions of the connected peripherals due to incorrect
conguration or calibration. The measured value and “HOLD” are
displayed alternately. The transmitter only returns to measuring
mode after enter is pressed and 20 seconds have passed.

Conguration mode is also exited automatically 20 minutes
(timeout) after the last keystroke. The transmitter returns to
measuring mode.

Timeout is not active during calibration.

Response of output signal:
Last: The output current is frozen at its last value.

Recommended for short conguration procedures.
The process should not change decisively during con­guration. Changes are not noticed with this setting!

Fix: The output current is set to a value that is noticeably

dierent from the process value in order to signal the
control system that the transmitter is being worked at.

28

External activation of HOLD mode

The Hold mode can be activated from outside by sending a signal
to the Hold input (e.g. from the process control system).

Power supply

Hold

12...24 V AC/DC

6

input

si794

7

Process control system

Hold active Hold inactive
10 ... 30 V AC/DC 0 ... 2 V AC/DC

Alarm

The alarm delay is congurable.
During an error message the alarm LED blinks or lights.

Error messages can also be signaled by a 22 mA
output current.

The alarm contact is activated by alarm or power failure,
see also Pg 60.

The alarm LED on the front panel can be congured as follows
HOLD o: Alarm: LED blinks
HOLD on: Alarm: LED on. HOLD: LED blinks

29

Configuration

In the Configuration mode you set the device parameters. The device can
store two different parameter sets and switch between them. Sensor data
and “Clean/Pset2” output are edited in parameter set 1 only. They are valid for
both parameter sets.

Configuring

Parameter set 1

Configure:

Press conf.

Enter mode code “1200”:
Edit parameter set 1 with and , con­firm/proceed with enter.

Parameter set 2

Configure:
“88” appears in the
display.

Enter mode code “1288”:
Edit parameter set 2 with
firm/proceed with enter.

and , con-

The output current is frozen

Hold

During
configuration
the device
remains in the
Hold mode.

Input errors

HOLD icon

(at its last value or at a preset fixed
value, depending on the configurati­on), limit and alarm contacts are inac­tive. The controller is in the configured
state, Sensoface is off, mode indicator
“Configuration” is on.

The configuration parameters are
checked during the input. In the
case of an incorrect input “Err” is dis­played for approx. 3 s. The incorrect
parameters cannot be stored. Input
must be repeated.

End End with conf. The measured value

and Hold are displayed alternately,
“enter” flashes. End Hold mode
with enter . The display shows the
measured value. The output current
remains frozen for another 20 s (HOLD
icon on, “hourglass” flashes).

30

Menu structure of conguration

The conguration steps are assigned to dierent menu groups.
Use the arrow keys to jump between the individual menu groups.
Each menu group contains menu items for setting the param­eters.
Press enter to access a menu item. Use the arrow keys to edit
values. Press enter to conrm/save the settings.
To return to measurement, press conf and then enter.

Select menu
group

Menu group Code Display

Output 1 o1.

Menu item 1

Menu item 2

Menu item ...

Output 2 o2.

Temperature
compensation

Calibration mode CA.

Alarm settings AL.

Relay rL.

Cleaning contact
PSet 2 selection

tc.

Cn.

...

Select
menu item

Previous
menu
group:

31

Overview of configuration steps

Code

Menu

Output 1

out1

o1.

Sensor selection *

Entry of cell factor

other*:

Enter transfer ratio
Select measuring frequency
Select temperature probe

Select process variable
Select solution (Conc)

Select current range
Characteristic (not for Conc, SAL)

Enter current start

LIN:

Enter current end

LOG:

Enter current start
Enter current end

Time averaging filter
22 mA signal for error messages
Signal response during HOLD

Enter fixed value

Fix:

Output 2

out2

o2.

Select temperature unit
Select current range
Enter current start
Enter current end
Time averaging filter
22 mA signal for temp error
Signal response during HOLD

Fix:

Enter fixed value

Selection / Default

2200 SIE, 8398 PM, 3700 GLI, other

xx.xxx c
xxx.xx
8 kHz / 12 kHz
Pt100/Pt1000/NTC100
mS/cm, S/m, Conc, SAL
NaCl, HCl, NaOH, H2SO4, HNO

(Code 01 ... 10. see Pg 113 et seq.)
0-20 mA / 4-20 mA
Linear LIN / Logarithmic LOG
xxxx mS

xxxx mS
in decades: 0.001 ... 1000
in decades: 0.001 ... 1000

xxxx SEC
ON / OFF
Last / Fix
xxx.x mA

°C / °F
0-20 mA / 4-20 mA
xxx.x
xxx.x
xxxx SEC
ON / OFF
Last / Fix
xxx.x mA

3

32

Sensor parameters

Siemens 7MA2200 8DA

Enter cell factor
Enter transfer ratio
Select measuring frequency
Select temperature probe

Siemens 7MA2200 8CB

Enter cell factor
Enter transfer ratio
Select measuring frequency
Select temperature probe

Siemens 7MA2200 8BF

Enter cell factor
Enter transfer ratio
Select measuring frequency
Select temperature probe

Polymetron 8398.5

Enter cell factor
Enter transfer ratio
Select measuring frequency
Select temperature probe

3.000

68.8
8 kHz
Pt100

3.160

68.8
8 kHz
Pt100

3.820

68.8
8 kHz
Pt100

2.35

141.6
8 kHz
Pt100

GLI Model 3700

Enter cell factor
Enter transfer ratio
Select measuring frequency
Select temperature probe

4.44

24.6
12 kHz
Pt1000

34

Code

Menu

Temperature compensation

tc

Temp compensation selection

tc.

Lin: Enter temperature coefficient

Alarm settings

ALrt

Select Sensocheck

AL.

Enter alarm delay

LED in Hold mode

Relay 1/2: Limit values, controller

rL AY

Select limit function / controller

rL.

Cln

Cn.

Select contact function

L1.

Select contact response
Enter setpoint
Enter hysteresis
Enter delay
Select contact function

L2.

Select contact response

Enter setpoint

Enter hysteresis
Enter delay
Enter controller setpoint

Ct.

Enter neutral zone
(P) Controller gain K
(I) Reset time T

(D) Rate time T

Pulse length / pulse frequency
PLC: Pulse length
PFC: Pulse frequency
Select HOLD response

Contact CLEAN / PSet2

(Select cleaning / signal/ parameter set)*

Rinsing interval

rinse

Rinse time

Contact response

R

D

Selection / Default

OFF / Lin / nLF
xx.xx %/K

ON / OFF
xxxx sec
ON / OFF

LiMIT / CtROL
Lo / Hi
N/O / N/C
xxxx
xxxx
xxxx SEC

Lo / Hi

N/O / N/C
xxxx
xxxx
xxxx SEC
xxxx
xxxx
xxxx %

P

xxxx SEC
xxxx SEC
PLC / PFC
xxxx SEC
xxxx /min

Y Last / Y Off

rinse / PSEt 2
xxx.x h
xxxx SEC
N/O / N/C

*) These parameters are only edited in parameter set 1.

They are valid for both parameter sets.

3535

Configuration

Output 1 Select sensor type.

Menu group

Output 1

Code

o1.

Display

Select menu item

Sensor selection

Select process variable

Select solution (Conc)

Select 0-20 / 4-20 mA

Characteristic: LIN / LOG

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit:
Press conf, then enter.

36

Code Display

o1.

Action

Select configuration
(Press conf.)

For parameter set 1:
Enter passcode “1200”
Select position using 4 arrow

After correct input a
welcome text (CONF) is
displayed for approx. 3 sec

key and edit number using 5
key. When the display reads
“1200”, press enter to confirm.)

For parameter set 2:
Enter passcode “1288”
Select position using 4 arrow

After correct input a
welcome text (CONF) is
displayed for approx. 3 sec

key and edit number using 5
key. When the display reads
“1288”, press enter to confirm.)

The transmitter is in the HOLD
mode (HOLD icon is active).

Select sensor*: Select using 4 key.
Press enter to proceed.

Note:

After each sensor selection the
nominal cell factor of the sensor
is stored. To adjust the cell factor
to the transmitter, calibrate the
sensor afterwards!

Note: Characters represented in gray are blinking and can be edited.

Choices

2200 SIE

(2200 SIE,
8398 PM,
3700 GLI,
Other)

*) These parameters are only edited in parameter set 1.

They are valid for both parameter sets.

37

Configuration

Output 1 Select sensor

Menu group

Output 1

Code

o1.

Display

Select menu item

Sensor selection

Select process variable

Select solution (Conc)

Select 0-20 / 4-20 mA

Characteristic: LIN / LOG

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit:
Press conf, then enter.

38

Code Display

o1.

Action

With other selected
the sensor parameters are
entered separately:

• Enter cell factor:

(Select position using 4 key

and edit number using5 key.)
Press enter to proceed.

• Enter transfer ratio
Press enter to proceed.

Choices

03.000

068.80 Hz

• Select measuring frequency

Select using 4 key.

Press enter to proceed.

• Select temperature probe

Select using 4 key.
Press enter to proceed.

Note

When other is called once more,
the last sensor parameters are
displayed and can be edited.

Note: Characters represented in gray are blinking and can be edited.

*) These parameters are only edited in parameter set 1.
They are valid for both parameter sets.

8 KHZ

(8 KHZ
12 KHZ)

100Pt

(100Pt
1000Pt
100NTC)

39

Configuration

Output 1 Select process variable

Menu group

Output 1

Code

o1.

Display

Select menu item

Sensor selection

Select process variable

Select solution (Conc)

Select 0-20 / 4-20 mA

Characteristic: LIN / LOG

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit:

Press conf, then enter.

40

Code Display

o1.

Action

Select process variable:

Select using 4 key.
Press enter to proceed.

Conductivity:

• 0.000 ... 9.999 mS/cm

• 00.00 ... 99.99 mS/cm

• 000.0 ... 999.9 mS/cm

• 0000 ... 1999 mS/cm

• 0.000 ... 9.999 S/m

• 00.00 ... 99.99 S/m

Salinity (SAL):

• 0.0 ... 45‰

Concentration (Conc)

• 0.00 ... 99.99 % by wt

Choices

000.0 mS

(0.000 mS

00.00 mS

000.0 mS
0000 mS

0.000 S/m

00.00 S/m

00.00 SAL

00.00 %
(Conc))

Note: Characters represented in gray are blinking and can be edited.

41

Configuration

Output 1 Concentration measurement: Select process solutions

Menu group

Output 1

Code

o1.

Display

Select menu item

Sensor selection

Select process variable

Select solution (Conc)

Select 0-20 / 4-20 mA

Characteristic: LIN / LOG

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit:
Press conf, then enter.

42

Code Display

o1.

Action

Only with 00.00 % Conc can you
select the process solution.

Select using 4 key.

-01- NaCl (0 ... 26 % by wt)

-02- HCl (0 ...18 % by wt)

-03- NaOH (0 ... 14 % by wt)

-04- H2SO4 (0 ... 30 % by wt)

-05- HNO3 (0 ... 30 % by wt)

-06- H2SO4 (92 ... 99 % by wt)

-07- HCl (22 ... 29 % by wt)

-08- HNO3 (35 ... 36 % by wt)

-09- H2SO

-10- NaOH (18 ... 50 % by wt)

Press enter to proceed.

(32 ... 84 % by wt)

4

Choices

-01-SOL

(-01-SOL

-02-SOL

-03-SOL

-04-SOL

-05-SOL

-06-SOL

-07-SOL

-08-SOL

-09-SOL

-10-SOL)

Example:
Ranges for sulfuric acid

Concentration curves / ranges

see page 112 et seq.

The concentration curves of many sub­stances show a maximum. This means that
if the substance concentration continues to
increase and the temperature remains con­stant, the conductivity will drop. Therefore,
a one-to-one correlation of values is only
possible in defined ranges.
These partial ranges must be selected as
measurement ranges in the configuration.

43

Configuration

Output 1 Output current range / LIN/LOG characteristic LIN characteristic: Current start / end

Menu group

Code

Display

Select menu item

Output 1

o1.

Sensor selection

Select process variable

Select solution (Conc)

Select 0-20 / 4-20 mA

Characteristic: LIN / LOG

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit:
Press conf, then enter.

44

Code

o1.

Display

Action

Set output current range
Select using 4 arrow key.
Press enter to proceed

Select output characteristic
Select using 4 arrow key.
Press enter to proceed.
(Step omitted for % (Conc) and
SAL)

With LIN selected:

• Enter current start
(lower end of scale).
Select position using 4 key,
edit number using 5 key.
Press enter to proceed.

• Enter current end
(upper end of scale).

Press enter to proceed

Assignment of measured values:
Current start and current end

Example 1: Range 0...200 mS/cm

[mS/cm]

200

Conductivity

Choices

4-20 mA

(0 - 20 mA/
4 - 20 mA)

LIN

(LIN / LOG)

000.0 mS

(xxx.x mS)

100.0 mS

(xxx.x mS)

Example 2: Range 100...200 mS/cm
Advantage: Higher resolution in range

[mS/cm]

200

of interest

Conductivity

0

Output current

[mA]

20 4

100

Output current

[mA]

20 4

45

Configuration

Output 1 Output current range / LOG characteristic Current start/end

Menu group

Code

Display

Select menu item

Output 1

o1.

Sensor selection

Select process variable

Select solution (Conc)

Select 0-20 / 4-20 mA

Characteristic: LOG

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit:
Press conf, then enter.

46

Display Action

Code

o1.

With LOG selected:

• Enter lower end of scale
(= current start)

Select position using 4 key,
edit number using5 key.

Press enter to proceed.

Choices

0.1 mS

(0.1 mS

1.0 mS
10 mS
100 mS
1000 mS)

• Enter upper end of scale
(= current end)

Select position using 4 key,
edit number using5 key.

Press enter to proceed.

Example: Measurement range over 3 decades

Y

100

10

0.1

Conductivity
[mS/cm]

1

4.0

9.3

14.7
Output current

Select: 0-20/4-20mA

• Current start: 4 mA

• Current end: 20 mA

Characteristic: LOG

• 4 mA 0.1 mS/cm

• 20 mA 100 mS/cm

X

[mA]

20.0

100 mS

(0.1 mS

1.0 mS
10 mS
100 mS
1000 mS)

47

Configuration

Output 1 Time averaging filter

Menu group

Output 1

Code

o1.

Display

Select menu item

Sensor selection

Select process variable

Select solution (Conc)

Select 0-20 / 4-20 mA

Characteristic: LIN / LOG

Enter current start

Enter current end

Set output filter

22 mA for error

HOLD mode

Exit:
Press conf, then enter.

48

Display Action

Code

o1.

Time interval of output filter
Default setting: 0 sec (inactive).
To specify a time interval:
Select position using 4,
edit number using 5.
Press enter to proceed.

Choices

0 sec

0 ... 120 sec

Time averaging filter (attenuation)

To smoothen the current output, a low-pass filter with adjustable
filter time can be switched on. When there is a jump at the input
(100 %), the output level is at 63 % after the time interval has been
reached.
The time interval can be set from 0 to 120 sec.
If the time constant is set to 0 sec, the current output follows the
input.

Note:

The filter only acts on the current output, not on the display, the
limit values, or the controller!

Conductivity

Time interval 0 to 120 sec

49

Configuration

Output 1 Output current during error and HOLD

Menu group

Output 1

Code

o1.

Display

Select menu item

Sensor selection

Select process variable

Select solution (Conc)

Select 0-20 / 4-20 mA

Characteristic: LIN / LOG

Enter current start

Enter current end

Set output filter

22 mA in the case of error

HOLD mode

Exit:
Press conf, then enter.

50

Code

o1.

Display

Action

22 mA signal for error message
Select using 4 key.
Press enter to proceed

Choices

OFF

(OFF / ON)

Output signal during HOLD

LAST: During HOLD the last mea-

sured value is maintained at the
output.

FIX: During HOLD a value (to be

entered) is maintained at the
output.
Select using 4 key.
Press enter to proceed.

Only with FIX selected:
Enter current which is to flow at
the output during HOLD
Select position using 4 key and
edit number using5 key.
Press enter to proceed.

Output signal during HOLD:

Output current
[mA]

21

4

Output signal for HOLD
FIX setting = 21.0 mA

HOLD active

LAST

(LAST / FIX)

021.0 mA

(00.0 ... 21.0
mA)

Output signal for HOLD
LAST setting

HOLD active

51

Configuration

Output 2 Temperature unit and probe / Output current

Menu group

Output 2

Code

o2.

Display

Select menu item

Select °C/°F

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for temp error

HOLD mode

Exit:
Press conf, then enter.

52

Code

o2.

Display

Action

Specify temperature unit
Select using 4 key.
Press enter to proceed.

Choices

°C

(°C / °F)

Set output current range
Select using 4 key.
Press enter to proceed.

Current start: Enter lower end of
scale.

Select using 4 key, edit number
using5 key, press enter to proceed.

Current end: Enter upper end of
scale.

Select using 4 key, edit number
using5 key, press enter to proceed.

Process temp: Current start and current end

Example 1: Range 0 ... 100 °C Example 2: Range 50 ... 70 °C.

[°C]

Process temperature

100

0

Output current

20 4

Advantage: Higher resolution in

[mA]

range of interest

Process temperature

[°C]
70

50

Output current

4 - 20 mA

(4 - 20 mA/
0 - 20 mA)

000.0 °C

(xxx.x °C)

100.0 °C

(xxx.x °C)

20 4

[mA]

53

Configuration

Output 2 Time averaging filter

Menu group

Output 2

Code

o2.

Display

Select menu item

Select °C/°F

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for temp error

HOLD mode

Exit:
Press conf, then enter.

54

Code

o2.

Display

Action

Time interval of output filter
Default setting: 0 sec (inactive).
To specify a time interval:
Select position using 4,
edit number using 5.
Press enter to proceed.

Choices

0 sec

(0...120 sec)

Time averaging filter (attenuation)

To smoothen the current output 2, a low-pass filter with adjustable
filter time can be switched on. When there is a jump at the input
(100 %), the output level is at 63 % after the time interval has been
reached.
The time interval can be set from 0 to 120 sec.
If the time constant is set to 0 sec (default), the current output
follows the input.

Note:

The filter only acts on the current output, not on the display!

Conductivity

Time inerval 0 to 120 sec

55

Configuration

Output 2 Temperature error / Output current during HOLD

Menu group

Output 2

Code

o2.

Display

Select menu item

Select °C/°F

Select 0-20 / 4-20 mA

Enter current start

Enter current end

Set output filter

22 mA for temp error

HOLD mode

Exit:
Press conf, then enter.

56

Code

o2.

Display

Action

22 mA signal for error message
Select using 4 key.
Press enter to proceed.

Choices

OFF

(OFF / ON)

Output signal during HOLD

LAST: During HOLD the last mea-

sured value is maintained at the
output.

FIX: During HOLD a value (to be

entered) is maintained at the
output.
Select using 4 key.
Press enter to proceed.

Only with FIX selected:
Enter current which is to flow at
the output during HOLD
Select position using 4 key and
edit number using5 key.
Press enter to proceed.

Output signal during HOLD:

Output current
[mA]

21

4

Output signal for HOLD
Setting FIX = 21.0 mA

HOLD active

LAST

(LAST / FIX)

21.0 mA

(00.0 ...

21.0 mA)

Output signal for HOLD
LAST setting

HOLD active

57

Configuration

Temperature compensation

Menu group

Temperature
compensation

Code

tc.

Display

Select menu item

Select
temperature compensation

Exit:
Press conf, then enter.

58

Code Display

tc.

Action

Select temperature compensa­tion (not for SAL, Conc)
OFF: Temperature compensation
switched off
Select using 4 key,
press enter to proceed.
LIN:
Linear temperature compensa-

Only with manual temp detection

tion with entry of temperature

selected (MAN)

coefficient and reference

Enter temperature.

temperature

Position mit Pfeiltaste

NLF:

***anwählen und

Temperature compensation for

Zahlenwert mit

natural waters to EN 27888

Choices

OFF

(OFF
LIN
nLF)

Only with linear temperature
compensation (LIN) selected:
Enter temperature coefficient.
Select position using 4 key and
edit number using 5 key.
Press enter to proceed.

02.00%/K

(XX.XX%/K)

59

Configuration

Alarm settings

Menu group

Alarm settings

Alarm

Code

AL.

Display

Select menu item

Select Sensocheck

Delay

LED in HOLD mode

Exit:
Press conf, then enter.

Alarm contact

15

The alarm contact is closed during normal operation (N/C).
It opens in the case of alarm or power outage.

16

As a result, a failure message is provided even in the case
of line breakage (fail-safe behavior). For contact ratings,
see Specifications.
Error messages can also be signaled by a 22 mA output
current (see Pg 51,

The operating behavior of the alarm contact is shown on
Pg 98.

The alarm delay acts on the LED, the 22 mA signal, and
the alarm contact.

57,

96).

60

Code

AL.

Display

Action

Select Sensocheck
(Continuous monitoring of sensor
properties)
Select using 4 key.
Press enter to proceed.

Choices

OFF

(ON / OFF)

Alarm delay

Select position using 4key,
edit number using 5key,
press enter to proceed.

LED in HOLD mode
Select using 4,

press enter to

proceed.

LED status:

Setting
ON

OFF

Alarm HOLD
on blinks

blinks off

0010 sec

(xxxx sec)

OFF

(ON / OFF)

61

Configuration

Limit function Relay 1

Menu group

Relay / Controller

Code

rL.

Display

Select menu item

L1.

Contact function

Contact response

Enter setpoint

Enter hysteresis

Delay

L2.

Relay 2 menu group

Controller menu group

Ct.

Exit:
Press conf, then enter.

62

Code

rL.

Display

Action

Use of relays:

• Limit function (LiMIT)

• Controller (CtROL)

Select using 4key.
Press enter to proceed.
Note: Selecting CtROL leads to
Controller menu Ct.

Choices

LiMIT

(LiMIT
CtROL)

L1.

For limit 1 function principle,
see Pg 65. Select using 4 key.
Press enter to proceed.

Limit 1 contact response

N/O: normally open contact
N/C: normally closed contact

Select using 4key.
Press enter to proceed.

Limit 1 setpoint

Select position using 4key, edit
number using 5 key. Press enter to
proceed.

Limit 1 hysteresis

Select position using 4key, edit
number using 5 key. Press enter to
proceed.

Limit 1 delay

The contact is activated with delay
(deactivated without delay)
Select position using 4key,
edit number using 5 key.
Press enter to proceed.

Lo

(Lo/Hi)

N/O

(N/O
N/C)

000.0 mS

(xxxx)

001.0 mS

(xxxx)

0010 sec

(0 ...
9999 sec)

63

Configuration

Limit function Relay 2

Menu group

Relay / Controller

Code

rL.

Display

Select menu item

Relay 1 menu group

L1.

L2.

Contact function

Contact response

Enter setpoint

Enter hysteresis

Delay

Controller menu group

Ct.

Exit:
Press conf, then enter.

64

Code

Display Action

L2.

For limit 2 function principle,
see Fig. below. Select using 4
key. Press enter to proceed.

Limit 2 contact response

N/O: normally open contact
N/C: normally closed contact

Select using 4 key.
Press enter to proceed.

Choices

Hi

(Lo)

N/O

(N/O
N/C)

Limit Lo

Hysteresis +

Setpoint

Contact

Limit 2 setpoint

Select position using 4key, edit
number using 5 key. Press enter to
proceed.

Limit 2 hysteresis

Select position using 4key, edit
number using 5 key. Press enter to
proceed.

Limit 2 delay
The contact is activated with
delay (deactivated without delay)

100.0 mS

(xxxx mS)

001.0 mS

(xxxx mS)

0010 sec

(0 ...
9999 sec)

Select position using 4 key,
edit number using5 key.
Press enter to proceed.

Signal

1

0

Limit Hi

Setpoint

Hysteresis -

Contact

Signal

1

0

65

Configuration

Controller (for description, see page 92 et seq.) Setpoint. Neutral zone

Menu group

Relay / Controller

Code

rL.

Display

Select menu item

L1.

Relay 1 menu group

L2.

Relay 2 menu group

Ct.

Controller setpoint

Enter neutral zone

(P) Controller gain

(I) Reset time TR

(D) Rate time TD

Pulse length /
Pulse frequency

PLC: Pulse length

PFC: Pulse frequency

HOLD response

Exit:
Press conf, then enter.

66

Code Display

Ct.

Action Choices

Setpoint

Select using 4 key, edit number
using5 key. Press enter to proceed.

050.0 mS

(xxxx)

Neutral zone (dead band)

Select using 4 key, edit number
using5 key. Press enter to proceed.

Controller: P action

Select using 4 key, edit number
using5 key. Press enter to proceed.

Controller: I action (reset time)

Select using 4 key, edit number
using5 key. Press enter to proceed.

Controller: D action (rate time)

Select using 4 key, edit number
using5 key. Press enter to proceed.

Pulse length /Pulse frequency
Select using 4key.
Press enter to proceed.

PLC: Pulse length

Select using 4 key, edit number
using5 key. Press enter to proceed.

PFC: Pulse frequency

Select using 4 key, edit number
using5 key. Press enter to proceed.

Behavior during HOLD

Select using 4key.
Press enter to proceed.

001.0 mS

(xxxx)

0100 %

(xxxx %)

0000 sec

(xxxx sec)

0000 sec

(xxxx sec)

PLC

(PFC)

0010 sec

(xxxx sec)

0060 /min

(xxxx /min)

Y Last

(Y Off/
Y Last)

67

Configuration

Controlling a rinsing probe or Signaling parameter set 1/2

Menu group

Contact:
CLEAN / PSet2

Code

Display

Cn.

rinse

68

Code

Cn.

Display

Select menu item

Select CLEAN / PSet2

Rinsing interval

Rinse time

Contact response

Action (rinsing probe)

Function selection*:

• Control of rinsing probe (rinse)

• Signaling active parameter set 2

Select using 4,
proceed.

Rinsing interval *
Select using 4, edit number
using5,

Rinse duration *
Select using 4, edit number
using5,

Select contact response*
N/O: normally open contact
N/C: normally closed contact
Select using 4,
proceed

*) These parameters are only edited in parameter set 1.

They are valid for both parameter sets.

press enter to

press enter to proceed.

press enter to proceed.

press enter to

Choices

rinse

(rinse /
PSet2)

For

PSet2
see next
page

000.0 h

(xxx.x h)

0060 sec
(xxxx sec)

N/O

(

N/O

N/C)

:

Controlling a rinsing probe

The “Clean” contact can be used to connect a simple rinsing probe.
Rinse duration and rinsing interval are defined during configuration.
Contact response can be set as N/O or N/C.

e.g. spray cleaning

Clean

17

18

Signaling parameter set 1/2

Depending on the selected parameter set, the relay
is active or inactive. The signal can be used for super­ordinated process control systems.
Parameter set 2 is indicated by “88” in the upper left
corner of the display.

Clean
PSet2

17

18

si794

Parameter set 1 selected

Parameter set 2 selected

Power supply

Power supply

Process control system

Power supply:
AC< 250 V / < 3 A / < 750 VA
DC< 30 V / < 3 A / < 90 W

69

Selecting parameter set 1/2

Manually or via a signal at the Control input

Display

After correct input a
welcome text (CONF)
is displayed for approx.
3 sec

Action Choices

To select a parameter set, press conf,
enter code: 7654
Select position using 4, edit number
using 5,

Wrong settings change the measurement
properties! If an invalid code is entered, the
transmitter returns to measuring mode.

press enter to proceed.

Select:

• Parameter set 1 (MAN)

• Parameter set 2 (MAN)

• Automatic switchover via

control input (Ctr-EXT)

Select using 4,

With -1- or -2- selected:
Since the complete device configura­tion is changed in one step, there is a

security prompt (No/Yes).

Note:

When pressing enter directly,
the selection is not saved.
Activation of parameter set 2 is
indicated by “88” in the upper left
corner of the display.

press enter to proceed.

-1-

(-1- MAN

-2-MAN
Ctr-EXT)

For Ctr-EXT,
see next
page

70

Display

Action Choices

With Control input

You can switch between the parameter

sets by applying an external signal to
the Control input (see below).

Ctr-EXT selected:

External switchover of parameter sets

The parameter set can be selected from outside by sending a
signal to the Control input (e.g. from the process control system).
To do so, Ctr-EXT is set during configuration.

Control

Power supply

7

input

si794

Note:

Parameter set 2 is indicated by “88” in the upper left corner of the
display.

8

Process control system

0 ... 2 V AC/DC Parameter set 1 selected

10 ... 30 V AC/DC Parameter set 2 selected

71

72

Default settings of parameter sets

Two complete parameter sets are stored in the EEPROM . As
delivered, the two sets are identical but can be edited differently.
Note:
Fill in your configuration data on the following pages.

Code. Parameter Default setting

o1. Sensor selection * 2200 SIE
o1. Measured variable 000.0 mS
o1. Conc solution -01­o1. 0/4-20 mA 4-20 mA
o1. Characteristic LIN
o1. Current start (LIN) 000.0 mS
o1. Current end (LIN) 100.0 mS
o1. Current start (LOG) 0.1 mS
o1. Current end (LOG) 100 mS
o1. Filter time 0 s
o1. 22mA signal OFF
o1. HOLD response Last
o1. Fix current 021.0 mA
o2. Unit °C / °F °C
o2. 0/4 ...20mA 4-20 mA
o2. Current start 000.0 °C
o2. Current end 100.0 °C
o2. Filter time 0 s
o2. 22mA signal OFF
o2. HOLD response Last
o2. Fix current 021.0 mA
tc. Temperature compensation
OFF
tc. Temp coefficient 02.00%/K
AL. Sensocheck OFF
AL. Alarm delay 0010 sec
AL. LED Hold OFF

*) These parameters are only edited in parameter set 1.
They are valid for both parameter sets.

Code. Parameter Default setting

rL. Relay function Limit
L1. Contact function Lo
L1. Contact response N/O
L1. Setpoint 000.0 mS
L1. Hysteresis 001.0 mS
L1. Delay 0010 sec
L2. Contact function Hi
L2. Contact response N/O
L2. Setpoint 100.0 mS
L2. Hysteresis 001.0 mS
L2. Delay 0010 sec
Ct. Setpoint 050.0 mS
Ct. Neutral zone 001.0 mS
Ct. P action 0100 %
Ct. I action 0000 sec
Ct. D action 0000 sec
Ct. PLC/PFC controller PLC
Ct. Pulse length 0010 sec
Ct. Pulse frequency 0060 /min
Ct. HOLD response Last
Cn. Rinse/Pset2 * rinse
Cn. Rinsing interval * 000.0 h
Cn. Rinse duration * 0060 sec
Cn. Contact response* N/O

73

Parameter set, individual settings

Code. Parameter Setting

P1 (conf 1200) P2 (conf 1288)
o1. Sensor ____________ *
o1. Process variable ____________ ____________
o1. Solution (Conc) ____________ ____________
o1. 0/4-20 mA ____________ ____________
o1. Characteristic (LIN/LOG) ____________ ____________
o1. Current start (LIN) ____________ ____________
o1. Current end (LIN) ____________ ____________
o1. Current start (LOG) ____________ ____________
o1. Current end (LOG) ____________ ____________
o1. Filter time ____________ ____________
o1. 22mA signal ____________ ____________
o1. HOLD response ____________ ____________
o1. Fix current ____________ ____________
o2. Unit °C / °F ____________ ____________
o2. Temp probe ____________ *
o2. 0/4 ...20mA ____________ ____________
o2. Current start ____________ ____________
o2. Current end ____________ ____________
o2. Filter time ____________ ____________
o2. 22mA signal ____________ ____________
o2. HOLD response ____________ ____________
o2. Fix current ____________ ____________
tc. Temp compensation ____________ ____________
tc. Temp coefficient ____________ ____________
AL. Sensocheck ____________ ____________
AL. Alarm delay ____________ ____________
AL. LED Hold ____________ ____________

74

Code. Parameter Setting

P1 (conf 1200) P2 (conf 1288)
rL. Relay function ____________ ____________
L1. Contact function ____________ ____________
L1. Contact response ____________ ____________
L1. Setpoint ____________ ____________
L1. Hysteresis ____________ ____________
L1. Delay ____________ ____________
L2. Contact function ____________ ____________
L2. Contact response ____________ ____________
L2. Setpoint ____________ ____________
L2. Hysteresis ____________ ____________
L2. Delay ____________ ____________
Ct. Setpoint ____________ ____________
Ct. Neutral zone ____________ ____________
Ct. P action ____________ ____________
Ct. I action ____________ ____________
Ct. D action ____________ ____________
Ct. PLC/PFC controller ____________ ____________
Ct. Pulse length ____________ ____________
Ct. Pulse frequency ____________ ____________
Ct. HOLD response ____________ ____________
Cn Rinse / PSet2 ____________ *
Cn Rinsing interval ____________ *
Cn Rinse duration ____________ *
Cn Contact response ____________ *

*) These parameters are only edited in parameter set 1.
They are valid for both parameter sets.

75

Calibration

Calibration adjusts the transmitter to the sensor.

Activation Activate with cal

Enter passcode

• Entry of cell factor: 1100

• With calibration solution: 0110

• Product calibration: 1105

• Zero point: 1001

• Temp probe adjustment: 1015

Use 4 and 5 to edit a
parameter.
Press enter to conrm/continue.
(To exit, press cal, then enter.)

HOLD

During cali­bration the
transmitter
remains in
the Hold
mode.

HOLD icon

During calibration the transmit­ter remains in the Hold mode
for reasons of safety. Output
current is frozen (last value or
preset xed value, depending
on conguration), limit and
alarm contacts are inactive. The
controller is in the congured
state, Sensoface is o, “Calibra­tion” mode indicator is on. Red
LED blinks when “HOLD ON” has
been set.

Input errors

76

The calibration parameters are
checked during the input. In the
case of an incorrect input “Err” is
displayed for approx. 3 sec. The
incorrect parameters cannot be
stored. Input must be repeated.

Exit Press cal to exit. The measured

value is shown in the main
display alternately with “Hold”,
“enter” blinks, Sensoface is
active. Press enter key to end
the Hold mode. The measured
value is dispålayed. The output
current remains frozen for
another 20 sec (HOLD icon on,
“hourglass” blinks).

Information on Calibration

Calibration can be performed by:

• Entry of cell factor

• Determining the cell factor with a known calibration solution taking

account of the temperature

• Product calibration

• Zero calibration in air or with calibration solution

• Temperature probe adjustment

Note:

If measurements are performed in fittings with A < 110 mm,
be sure to choose a calibration beaker with the same cross­section and of the same material (metal/plastic).

Important Note:

All calibration procedures must be performed by trained person-•
nel. Incorrectly set parameters may go unnoticed, but change the
measuring properties.
When another sensor is used, its sensor data (cell factor, transfer ratio, •
measuring frequency, temperature probe) must be entered in the
configuration menu before calibration.
Each time a new sensor is connected, the transmitter must be •
calibrated.

77

Calibration by input of cell factor

Input of cell factor with simultaneous display of conductivity and
temperature (without temperature compensation)

Display

78

Action

Press cal key, enter code: 1100.
Select position using 4,
edit number using5,
press enter to proceed.

Ready for calibration

Remove and clean sensor

Enter cell factor:

Select position using 4 key,
edit number using5 key.
Conductivity and temperature
are alternately displayed dur­ing the input (lower display).
Press enter to confirm entry.

The entered cell factor and
zero point are displayed.
Press enter to confirm.

Remark

If an invalid code is
entered, the trans­mitter returns to
measuring mode.

Display (3 sec)
Transmitter in Hold
mode, measured
value frozen.
Sensoface inactive.

Display Action

Conductivity and temperature
are displayed.

The measured value is shown
in the main display alternately
with “Hold”. “enter” blinks.
Press enter to end calibration.

Remark

After end of
calibration, the out­puts remain in Hold
mode for approx.
20 sec.

79

Calibration with calibration solution

Be sure to use known calibration solutions and the respective tempera­ture-corrected conductivity values (see Calibration solutions Pg 106/107).
During the calibration procedure the temperature should be kept con­stant.

Display

80

Action

Press cal key, enter code: 0110.
Select position using 4,
edit number using5,
press enter to proceed.

Ready for calibration

Remove and clean sensor

Immerse sensor in calibration
solution.
Enter the temperature­ corrected conductivity value
of the calibration solution:
Select position using 4 key,
edit number using
Cell factor and temperature
are alternately displayed in the
lower display.
Press enter to confirm entry.

5 key.

Remark

If an invalid code is
entered, the trans­mitter returns to
measuring mode.

Display (3 sec)
Transmitter in Hold
mode, measured
value frozen.
Sensoface inactive.

When there has
not been an entry
for 6 sec, the lower
display alternately
shows the conduc­tivity and tempera­ture value.

Display Action

The determined cell factor and
zero point are displayed.
Press enter to confirm
cell factor.

Remark

Conductivity and temperature
are displayed.
The measured value is shown
in the main display alternately
with “Hold”; “enter” blinks.
Press enter to end calibration.

After end of
calibration, the out­puts remain in Hold
mode for approx.
20 sec.

81

Product calibration

Calibration by sampling

The measurement process is only interrupted briefly. During
product calibration the sensor remains in the process.
Calibration is without TC correction!

Procedure: During sampling the currently measured value is
stored in the transmitter. The transmitter immediately returns
to measuring mode. The calibration mode indicator blinks and
reminds you that calibration has not been terminated. The sam­ple is measured in the lab or directly on the site using a portable
meter. The measured sample value is then entered in the trans­mitter. The new cell factor is calculated from these two values.
If the sample is invalid, you can take over the value stored dur­ing sampling. In that case the old calibration values are saved.
Afterwards, you can start a new product calibration.

Display

82

Action

Product calibration step 1:
Press cal, enter code: 1105.
(Press 4 key to select position,
enter number using 5 key.
Press enter to confirm.)

Take sample and store value.
Press enter to proceed.

Remark

If an invalid code is
entered, the trans­mitter returns to
measuring mode.

Display (approx.
3 sec)

Now the sample
can be measured in
the lab.

Display

Action

Remark

Measuring mode:

From the blinking CAL mode
indicator you see that product
calibration has not been ter­minated.

Product calibration step 2:
When the sample value has
been determined, open the
product calibration once more
(cal, code 1105).

Enter sample value. The new
cell factor is calculated.
Press enter to confirm.

The new cell factor and zero
point are displayed.
Press enter to confirm.

The measured value is shown
in the main display alternately
with “Hold”. “enter” blinks.
Press enter to exit.

Until the sample
value is deter­mined and can
be entered, the
transmitter is in
measuring mode.

Display (approx.
3 sec)

New calibration:
Press cal.

After end of
calibration, the
outputs remain
in Hold mode for
approx. 20 sec.

83

Zero calibration in air

Display

Action

Press cal key, enter code: 1001.
Select position using 4,
edit number using5,
press enter to proceed.

Ready for calibration

Remove and clean sensor.
(Sensor must be dry!)

Modify the zero point until
zero is displayed as conductiv­ity value in the lower display.

Select using 4 key,
edit number using

If required, change the sign of
the zero point.

Press enter to confirm the zero
point.

5

key.

Remark

The transmitter is in
the Hold mode.
If an invalid code is
entered, the trans­mitter returns to
measuring mode.

Display (3 sec)

When there has
not been an entry
for 6 sec, the lower
display alter­nately shows the
conductivity and
temperature value.

84

Display Action

The cell factor and zero point
are displayed.
Press
calibration data.

Conductivity and temperature
are displayed.

Place sensor in process.

Remark

enter to confirm the

The measured value is shown
in the main display alternately
with “Hold”; “enter” blinks.
Press

enter to end calibration.

After end of calibra­tion, the outputs
remain in Hold
mode for approx.
20 sec.

85

Zero calibration with calibration solution

Calibration solution with low conductivity

Display

Action

Press cal key, enter code: 1001.
Select position using 4,
edit number using5,
press enter to proceed.

Ready for calibration

Remove and clean sensor

Immerse sensor in calibration
solution.
Modify the value until the
lower display shows the
conductivity value of the
calibration solution.
Press enter to confirm
calibration.

The cell factor and zero point
are displayed.
Press

enter to confirm the

calibration data.

Remark

The transmitter is in
the Hold mode.
If an invalid code is
entered, the trans­mitter returns to
measuring mode.

Display (3 sec)

When there has
not been an entry
for 6 sec, the lower
display alternately
shows the conduc­tivity and tempera­ture value.

86

Display Action

Conductivity and temperature
are displayed.
Remove the sensor from the
calibration solution and clean
it.
Place sensor in process.

Remark

The measured value is shown
in the main display alternately
with “Hold”; “enter” blinks.
Press

enter to end calibration.

After end of calibra­tion, the outputs
remain in Hold
mode for approx.
20 sec.

87

Temp probe adjustment

Display

Action

Select calibration
(Press cal,
enter passcode: 1015)
Select position using4key,
edit number using 5key.
Press

Measure the temperature of
the process medium using an
external thermometer

Enter measured temperature
value.
Select position using4key,
edit number using 5key.
Press
Press enter to exit adjustment.
HOLD will be deactivated after
20 sec.

Measurement

Display

Remark

In the measuring mode the main display shows the
configured process variable (conductivity [mS/cm,
S/m], concentration [% by wt], or salinity [SAL]) and
the lower display shows the temperature.
The transmitter is switched to measuring mode
by pressing cal during calibration or by pressing
conf during configuration (waiting time for signal
stabilization approx. 20 sec).

88

enter to proceed.

enter to proceed.

Remark

Wrong settings
change the measure­ment properties! If
an invalid code is
entered, the trans­mitter returns to
measuring mode.

The transmitter is in
the Hold mode.

Default:
Value of secondary
display.

Diagnostics functions

Display

Remark

Display of output currents

Press enter while in measuring mode.
The current at output 1 is shown in the main display,
the current at output 2 in the secondary display.
After 5 sec the transmitter returns to measuring
mode.

Display of calibration data (Cal Info)

Press cal while in measuring mode and confirm code

0000. The current cell factor is shown in the main
display, the zero point underneath. After 20 sec the
transmitter returns to measuring mode (immediate
return at pressing enter).

Sensor monitor for validation

of sensor and complete measured-value processing.

Loop a defined sensing resistor (e.g. R = 100 Ω) through

the sensor as shown in the figure.
Press the conf key and enter code: 2222. The sensor
monitor displays the directly measured resistance and
the temperature.
If there is a significant difference between resistor
value and display, the sensor and its transmission
behavior should be checked.
Press enter to return to measurement.
Caution: The transmitter does not automatically go to
Hold mode.

Display of last error message

(Error Info)
Press conf while in measuring mode and confirm
code 0000. The last error message is displayed for
approx. 20 sec.
After that the message will be deleted (immediate
return to measurement at pressing enter).

89

Diagnostics functions

These functions are used for testing the connected peripherals.

Display

Select a
relay

Test 0/1

Return to
measure­ment

Action / Remarks

Specify current at output 1

• Press conf, enter code: 5555
The current indicated in the main display for output 1
can be edited.
Select position using 4, edit number using 5,
press

enter to confirm. Then the entered value will be
shown in the secondary display.
The transmitter is in Hold mode.
Press conf, then enter to return to measurement
(Hold remains active for another 20 sec).

Specify current at output 2

• Press conf, enter code: 5556
The current indicated in the main display for
output 2 can be edited.
Select position using 4, edit number using 5,
press

enter to confirm. Then the entered value will be
shown in the secondary display.
The transmitter is in Hold mode.
Press conf, then enter to return to measurement
(Hold remains active for another 20 sec).

Relay test (manual test of contacts)

• Press conf, enter code: 5557
The relays are frozen. This state is indicated in the
display. The 4 digits in the display correspond to the
4 relays (as located on the terminal plate):
1st digit: R1
2nd digit: R2
3rd digit: AL
4th digit: CLN
Function test using arrow keys – see left column.
When exiting the function (enter), the relays are set
corresponding to the measured value.

90

Display

Controller
characteristic

The arrows indicate
which relay (valve)
is active:

+100 %

Controller
output

Setpoint

-100 %

Relay 2 active
(Meas. value >
setpoint)

Relay 1 active
(Meas. value <
setpoint)

Action / Remarks

Controller test (manual specification of controller
output)

• Press conf, enter code: 5559
After function activation “Ctrl” is displayed for
approx. 3 sec. With the controller turned off, “OFF”
is displayed in addition, then return to measuring
mode.
The function is used to start up control loops or check
the actuators.
For bumpless changeover to automatic opera­tion (exiting this function), configure an I-action
component (reset time).

Specify value:
Select using4key, edit number using5key.
Press

enter to proceed.

The transmitter is in Hold mode.
Press enter to return to measurement (Hold remains
active for another 20 sec).

Controller output -100 to 0 %: Relay 2 active

Controller output 0 to +100 %: Relay 1 active

Momentary controller output (adjusted value has not
been saved yet)

91

Controller functions

PID controller

P controller

Application in integrating systems
(e.g. closed tank, batch processes).

PI controller

Application in non-integrating systems
(e.g. drains).

PID controller

The additional derivative action compensates for
measurement peaks.

Controller characteristic

Setpoint

92

+100 %

-100 %

Controller

output Y

p

[%]

Neutral zone Y

= 0

p

mS/cm

Controller equations

Controller output Y = YP + YPdt + T

P action

1

T

R

I action

dY

D

dt

D action

P

Proportional action Y

Setpoint - Meas. value

YP =

Measuring range

P

K

*

C

with:

Y

P

T

R

T

D

K

C

Proportional action
Reset time [s]
Rate time [s]

Controller gain [%]

Neutral zone (Y=0)

Tolerated deviation from desired value.
With the setting “1 mS/cm” a deviation of ± 0.5 mS/cm
from the desired value does not activate the controller.

Proportional action (Gradient KC [%])

100 %

Controller

50 %

output Y

X

w

KC = 500 %

KC = 200 %

MR*0.2 MR*0.4

Deviation

KC = 100 %

MR*0.6

(Process variables: mS/cm, S/m, SAL)

KC = 50 %

MR*0.8

MR

93

Controller functions

Pulse length / pulse frequency controller

Pulse length controller (PLC)

The pulse length controller is used to operate a valve as an
actuator. It switches the contact on for a time that depends on
the controller output. The period is constant. A minimum ON
time of 0.5 sec is maintained even if the controller output takes
corresponding values.

Output signal (relay contact) of pulse length controller

1

0
1

0

ON time (Y = 20 %)

ON time (Y = 80 %)

Pulse length

94

Pulse frequency controller (PFC)

The pulse frequency controller is used to operate a frequency­controlled actuator (metering pump). It varies the frequency
with which the contacts are switched on. The maximum pulse
frequency [pulses/min] can be defined. It depends on the
actuator.
The contact ON time is constant. It is automatically calculated
from the user-defined maximum pulse frequency.

Output signal (relay contact) of pulse frequency controller

1

0

1

0

ON time

Pulse frequency (Y = 20%)

Pulse frequency (Y = 80%)

95

Error messages (error codes)

Error

ERR 01

ERR 02

ERR 98

ERR 99

ERR 03

Display

Measured
value
blinks

Measured
value
blinks

“Conf”
blinks

“FAIL”
blinks

Problem
Possible causes

Sensor

• Wrong cell factor

• Measurement range violation

• SAL > 45 ‰

• Sensor connection or cable defective

Unsuitable sensor

Conductance range > 3000 mS

System error

Configuration or calibration data
defective; completely reconfigure
and recalibrate the transmitter.
Memory error in device program

Factory settings

EEPROM or RAM defective
This error message only occurs
in the case of a total defect. The
transmitter must be repaired and
recalibrated at the factory.

Temperature probe

Open or short circuit
Temperature range exceeded

Out 1 (22 mA)

Red LED

Alarm contact

xx

xx

xx

xx

xx

Out 2 (22 mA)

x

x

x

x

x

x

x

x

96

Error

ERR 11

ERR 12

ERR 13

ERR 21

ERR 22

ERR 23

ERR 33

ERR 34

Icon
(blinks)

Problem
Possible causes

Current output 1

Current below 0 (3.8) mA

Current output 1

Current above 20.5 mA

Current output 1

Current span too small / too large

Current output 2

Current below 0 (3.8) mA

Current output 2

Current above 20.5 mA

Current output 2

Current span too small / too large

Sensocheck: Primary coil
Secondary coil

Temperature outside conversion
tables (TC, conc, SAL)

Red LED

Out 1 (22 mA)

Alarm contact

x

xx

x

xx

x

xx

xx

xx

xx

x

xx

Sensoface active
see page 100

Sensoface active
see page 100

Out 2 (22 mA)

x

x

x

97

Operating states

Operating status

Measuring

Alarm contact

Cleaning

contact

LED

Rel.1/2

Out 1

Out 2

Rel.1/2

Controller

Limit value

Timeout

Cal Info
(cal) 0000

Error Info
(conf) 0000

Zero point
(cal) 1001

Calibration
(cal) 1100

Calibration
(cal) 0110

Temp adjustment
(cal) 1015

Product cal 1
(cal) 1105

Product cal 2
(cal) 1105

Conf par set 1
(conf) 1200

Conf par set 2
(conf) 1288

Parameter set 1/2
(conf) 7654

98

20
min

20
min

20
min

20
s

20
s

Operating status

Sensor monitor
(conf) 2222

Current source 1
(conf) 5555

Current source 2
(conf) 5556

Relay test
(conf) 5557

Manual controller
(conf) 5559

Cleaning function

HOLD input

Rel.1/2

Controller

Rel.1/2

Out 2

Out 1

Limit value

contact

LED

20
min

20
min

20
min

20
min

20
min

Timeout

Alarm contact

Cleaning

Explanation:

active

as configured (Last/Fix or Last/Off )

99

Sensoface

The smiley in the display (Sensoface) alerts to sensor problems
(defective sensor, defective cable). The conditions for a friendly,
neutral, or sad Sensoface are summarized in the following chart.
Additional icons refer to the error cause.

Sensocheck

Continuously monitors the primary coil and its lines for short
circuits and the secondary coil and its lines for open circuits.
Sensocheck can be switched off. Critical values make the
Sensoface “sad” and the corresponding Sensocheck icon blinks:

Sensocheck messages are also output as error messages Err 33
or Err 34. The alarm contact is active, the red LED is lit, output
current 1 is set to 22 mA (when configured correspondingly).
Sensocheck can be switched off during configuration (then
Sensoface is also disabled).

Exception:
After a calibration a smiley is always displayed for confirmation.

Note

The worsening of a Sensoface criterion leads to the devaluation
of the Sensoface indicator (Smiley becomes “sad”).
An improvement of the Sensoface indicator can only take place
after calibration or removal of the sensor defect.

100