JUMO CTI-500 Operating Instructions Manual

JUMO CTI-500

Inductive Conductivity/Concentration and

Temperature Transmitter with switch contacts

Type 202755

Operating Instructions

20275500T90Z001K000

V5.01/EN/00444870

WARNING:

A sudden failure of the instrument or of a sensor connected to it could result in dangerous
overdosing. Please take suitable precautionary measures for this case.

All the nececssary settings are described in this manual. However, if any difficul­ties should arise during start-up, please do not carry out any unauthorized mani­pulations. You could endanger your righs under the instrument warranty!

Please contact the nearest subsidiary or the head office in such a case.

Resetting the LC display

If the brightness/contrast setting is such that the text in the display is not reada­ble, the basic setting can be restored as follows:

✱ Switch off the supply voltage.
✱ Switch on the supply voltage and immediately keep the keys and held

down.

Resetting the operating language to "English"

If the operating language has been set and you cannot understand the text of the
display, the language can be set to "English" with the Administrator password

7485. Thereafter, the desired language can be set in ADMINISTRATOR LEVEL /

DEVICE DATA / ....

Contents

1 Typographical conventions ...................................................... 5

1.1 Warning signs ..............................................................................................5

1.2 Note signs ....................................................................................................5

2 General ....................................................................................... 6

2.1 Preface .........................................................................................................6

2.2 Design of the measuring transmitter ............................................................6

3 Inductive conductivity measurement ...................................... 7

3.1 Area of application .......................................................................................7

3.2 Function .......................................................................................................8

4 Identifying the device version .................................................. 9

4.1 Nameplate ....................................................................................................9

4.2 Order details ...............................................................................................10

5 Device description .................................................................. 13

5.1 Transmitter technical data ......................................................................13

6 Mounting .................................................................................. 18

6.1 General .......................................................................................................18

6.2 Head-mounted transmitter .........................................................................19

6.3 Split version (separate sensor) ...................................................................20

7 Installation ............................................................................... 25

7.1 General ......................................................................................................26

8 Setup program ........................................................................ 29

8.1 Function .....................................................................................................29

9 Commissioning ....................................................................... 30

9.1 Head-mounted transmitter or split version ................................................30

9.2 Replacement sensor ..................................................................................30

10 Operation ................................................................................. 31

10.1 Controls ......................................................................................................31

Contents

10.2 Principle of operation .................................................................................33

10.3 Principle of operation .................................................................................35

10.4 Measurement mode ...................................................................................36

10.5 Operator level .............................................................................................36

10.6 Administrator level .....................................................................................44

10.7 Calibration level ..........................................................................................46

10.8 The dilution function ...................................................................................47

11 Calibration ............................................................................... 51

11.1 General .......................................................................................................51

11.2 Calibrating the relative cell constant ..........................................................51

11.3 Calibrating the temp. coefficient of the sample solution ...........................52

12 Maintenance ............................................................................ 60

12.1 Cleaning the conductivity sensor ...............................................................60

13 Eliminating faults and malfunctions ...................................... 61

13.1 Checking the device ..................................................................................61

14 Appendix .................................................................................. 66

14.1 Before configuration ...................................................................................66

15 China RoHS ............................................................................. 70

1.1 Warning signs

Danger

This symbol is used when there may be danger to personnel if the
instructions are ignored or not followed correctly!

Caution

This symbol is used when there may be damage to equipment or data if the
instructions are ignored or not followed correctly!

1.2 Note signs

Note
This symbol is used when your special attention is drawn to a remark.

1 Typographical conventions

1

abc

✱ Action instruction

Footnote

Footnotes are remarks that refer to specific points in the text. Footnotes
consist of two parts:

A marker in the text, and the footnote text.
The markers in the text are arranged as continuous superscript numbers.

This symbol indicates that an action to be performed is described.
The individual steps are marked by this asterisk.
Example:
✱ Remove crosspoint screws.

5

2 General

(2)

(1)

(3)

Head-mounted version:

Transmitter combined with

conductivity sensor,

Type 202755/xx...

Split version:

Transmitter with

separate sensor,

Type 202755/xx...

(1)

(2)

(4)

(5)

(4)

(3)

2.1 Preface

Please read these operating instructions before commissioning the
instrument. Keep the manual in a place that is accessible to all users at all
times.

2.2 Design of the measuring transmitter

Examples

(1) Transmitter (4) Inductive conductivity sensor

(2) Process connection (5) With or without graphics LC display

(3) Exposed temperature sensor

6

3 Inductive conductivity measurement

3.1 Area of application

General The inductive measurement method permits largely maintenance-free

acquisition of the specific conductivity, even in difficult media conditions.
Unlike the conductive measurement method, problems such as electrode
decomposition and polarization do not occur.

Brief
description

The instrument is used for the measurement/control of conductivity or
concentration in liquid media. It is particularly recommended for use in media
where severe deposits of dirt, oil, grease or gypsum/lime precipitates are to be
expected. The integrated temperature measurement enables fast and
accurate temperature compensation, which is of particular importance when
measuring conductivity.

Two built-in switching outputs can be freely programmed to monitor limits for
conductivity / concentration and / or temperature. It is also possible to assign
alarm and control functions (dilution).

The instrument is operated either from the membrane keypad and plain-text
graphics display (operator language can be changed over) or through the user­friendly PC setup program. Simply rotating the housing cover makes it
possible to read the display, regardless of whether the installation is in
horizontally or vertically arranged pipes. By using the setup program, the
instrument configuration data for plant documentation can be saved and
printed out. To prevent any tampering, the instrument can also be supplied
without keypad or display. In this case, the setup program is needed for
programming.

The measuring transmitter is available either as a combined unit (transmitter
and measuring cell together in one unit) or as a split version (transmitter and
cell connected by cable). The split version is particularly suitable for plant
subjected to strong vibration and/or significant heat radiation at the point of
measurement, or for installation on sites that are difficult to access. Immersion
models up to 2000 mm are available for application in open containers or
sluices.

Typical areas of
application

- freshwater and wastewater engineering

- HVAC systems and cooling tower monitoring (dilution control)

- flushing baths (e.g. monitoring electroplating baths)

- inlet and final control in on-site sewage treatment plants

- concentration monitoring

- vehicle washing plant

7

3 Inductive conductivity measurement

(2)

(1)

(3)

(4)

(1a)

3.2 Function

of the
transmitter

of the
measuring cell

The transmitter has been designed for use on site. A rugged housing protects
the electronics and the electrical connections from corrosive environmental
conditions (IP67 enclosure). As standard, the device has one analog signal
output each for conductivity/concentration and temperature respectively.
Further processing of the standard signals can take place in a suitable display/
control device, or, for example, directly in a PLC.

The output signals are electrically isolated from one another and from the
medium.

The conductivity is measured using an inductive probe. A sinusoidal a.c.
voltage feeds the transmitting coil. Depending on the conductivity of the liquid
to be measured, a current is induced in the receiver coil. This current is
proportional to the conductivity of the medium. The cell constant of the
inductive probe depends on its geometry. The cell constant can also be
affected by components in the immediate vicinity.

(1) Temperature sensor, exposed (1a) optionally:

internal temperature sensor
(2) Measuring cell body in PP (3) Measurement coils
(4) Liquid loop

8

4.1 Nameplate

On the transmitter

The nameplate is affixed to the case.

On the separate sensor

The nameplate (flag tag) is affixed to the connecting cable.

Contents

The nameplate contains important information. This includes:

4 Identifying the device version

Description Description on the

Device type Typ 202755/15-168-0-82/000
Fabrication number F-Nr 0220465201018240001
Voltage supply - DC 19 ... 31 V

Device type (Typ)

Compare the specifications on the nameplate with the order.
Identify the supplied device version using the order details (order code).

Fabrication number (F-Nr)

Among other things, the fabrication number contains the date of production
(year/week).
Example: F-Nr = 0220465201018240001
The characters in question are in positions 12 to 15 (from the left).
The device was therefore produced in the year 2018 in its 24th calendar week.

For devices with a separate sensor (type code extensions /60 or /65), the
transmitter and detached sensor are matched to one another at the factory!
When connecting the components, please note that the serial number of the
external sensor (marked on the flag tag attached to the connecting cable) must
match the serial number marked on the nameplate of the transmitter!

Example

nameplate

9

4 Identifying the device version

4.2 Order details

4.2.1 Head-mounted transmitter

(1) Basic types

202755/10 JUMO CTI-500 Head transmitter without display/keyboard, consisting of

transmitter with permanently mounted sensor

202755/15 JUMO CTI-500 Head transmitter with display/keyboard

(2) Process connection

168 PVC union nut G 1 ½ A
169 Stainless steel union nut G 1 ½ A

2,6

2

607 Taper socket with union nut DN 50 DIN 11851 (dairy compression fitting)
617 Clamping socket (clamp) 2 ½" similar to DIN 32676
690 SMS DN 2"

(3) Immersion length

0 see chapter 6.2 "Head-mounted transmitter", page 19

(4) Electrical connection

82 cable glands
83 M12 plug / socket connector (instead of cable glands)
84 two M16 cable glands and one blanking plug

(5) Extra codes

4

000 no extra code
062 with DNV GL approval

8

268 internal temperature sensor
580 1 set M12 plug/socket connectors
768 Measurement cell material PVDF

5

844 Voltage supply AC 24 V

1

7

3

(1) (2) (3) (4) (5) (5)
Order code / - - / , ...
Order example 202755/10 / 168 - 0 - 82 / 000 ,

1

The PC setup program is required for programming the device.

2

Special tee is not included in delivery.

3

If required, order extra code /580

4

Indicate the type code extension in succession separated by a comma.

5

Only in case of process connection 168 and 169 in combination with type code extension 268.

6

Maximum medium temperature 60°C.

7

Assembly material (holding clamp) not part of the supplied kit. If required, please order
additionally.

8

Not possible in conjunction with extra code 768 and/or 844.

10

4 Identifying the device version

4.2.2 Transmitter with separate sensor

(2) Basic types

202755/20 JUMO CTI-500 transmitter without display/keyboard (without sensor)
202755/25 JUMO CTI-500 transmitter with display/keyboard (without sensor)
202755/60

202755/65

202755/80 JUMO CTI-500 replacement sensor with 10 m cable without transmitter,

000 not available
168 PVC union nut G 1 ½ A
169 Stainless steel union nut G 1 ½ A
607 Taper socket with union nut DN 50 DIN 11851 (dairy compression fitting)
617 Clamping socket (clamp) 2 ½" similar to DIN 32676
690 SMS DN 2"
706 immersion version

0 not available
0500 0500 mm
1000 1000 mm
1500 1500 mm
2000 2000 mm (maximum)

xxxx special length (in 250 mm steps; e.g. 0250; 0750; 1250; 1750)

21 fixed cable with M12 socket connector on separate sensor
82 cable glands on the operating unit
83 M12 plug/socket connectors on operating unit
84 two M16 cable glands and one blanking plug

000 no extra code
268 internal temperature sensor
580 1 set M12 plug/socket connectors
768 Measurement cell material PVDF
844 Voltage supply AC 24 V

JUMO CTI-500 transmitter without display/keyboard with sensor
(cable length: 10 m)

1

JUMO CTI-500 transmitter with display/keyboard with sensor
(cable length: 10 m)

including calibration set

3,7

(3) Process connection

2, 8

2

(4) Immersion length

(5) Electrical connection

4

(6) Extra codes

5

6

3

1

7

(1) (2) (3) (4) (5) (5)
Order code / - - / , ...
Order example 202755/65 / 706 - 1000 - 82 / 000 ,

11

4 Identifying the device version

1

The PC setup program is required for programming the instrument.

2

A tee is not included in delivery.

3

Mounting items (union/ring nuts, holding clamp) are not included in delivery.
If required, please order additionally.

4

If required, order extra code /580

5

Show type extension codes in succession separated by a comma.

6

Only in case of process extension 168 and 169 in combination with type extension code 268.

7

A balancing set is urgently required for commissioning. If required, please order additionally.

8

Maximum medium temperature 60 °C.

12

5.1 Transmitter technical data

5.1.1 General

A/D converter resolution: 15-bit

sampling time: 500 msec = 2 measurements/sec

Supply For operation in SELV- and PELV-circuits!

As standard:
19 — 31 V DC (24 V DC nominal), with reverse-polarity protection

extra code 844:
AC 24 V ±10%, 50...60 Hz

ripple: < 5%
power consumption with display: ≤ 3 W
power consumption without display: ≤ 2.6 W

5 Device description

Rating of the
solid-state
relays

Electrical
connection

Display (option) graphics LCD with background lighting; adjustable contrast

Permissible
ambient
temperature
(transmitter)

Permissible
storage
temperature
(transmitter)

Enclosure
protection
(transmitter)

U ≤ DC 45 V
U ≤ AC 30 V
I ≤ 200 mA

plug-in screw terminals 2.5 mm

dimensions: 62 x 23 mm

-5 to +50°C
max. 93% relative humidity, no condensation

-20 to +75°C
max. 93% relative humidity, no condensation

IP67

2

or M12 plug/socket connector

Housing Polyamide

Weight depending on version and process connection

approx. 0.3 — 2 kg

13

5 Device description

5.1.2 Conductivity/ concentration transmitter

Concentration
measurement

(implemented in
the device
software)

Calibration
timer

Output
signal
Conductivity/
concentration

Burden ≤ 500Ω for current output

Analog output
for “Alarm”

- NaOH (caustic soda)
0 — 15 % by weight or 25 — 50 % by weight

- HNO

- customer-specific concentration curve

adjustable: 0 — 999 days (0 = off)

0 — 10 V / 10 — 0 V
2 — 10 V / 10 — 2 V
0 — 20 mA / 20 — 0 mA
4 — 20 mA / 20 — 4 mA

The output signal is freely scalable.

≥ 2kΩ for voltage output

Low (0 mA / 0 V / 3.4 mA / 1.4 V) or
High (22.0 mA / 10.7 V) or
a value with a fixed setting (safe value)

(nitric acid); check chemical resistance of the sensor !

3

0 — 25 % by weight or 36 — 82 % by weight

freely programmable through the setup program (see “special functions”)

Measuring
ranges

Four ranges can be selected.
One of these ranges can be activated via an external switch or a PLC.

Measurement ranges
Tran sm it te r

0 — 500 µS/cm
0 — 1000 µS/cm
0 — 2000 µS/cm
0 — 5000 µS/cm
0 — 10 mS/cm
0 — 20 mS/cm
0 — 50 mS/cm
0 — 100 mS/cm
0 — 200 mS/cm
0 — 500 mS/cm
0 — 1000 mS/cm
0 — 2000 mS/cm

1

not compensated for temperature

Note:
The overall tolerance is made up of the tolerance of the transmitter + the
tolerance of the sensor.

1

To ler an ce

(in % of range

span)

≤0.5%

14

5.1.3 Temperature transmitter

5 Device description

Temperature
acquisition

Temperature
measurement
range

Characteristic linear

To ler an ce ≤ 0.5% of range

Output signal
for temperature

Burden ≤ 500Ω for current output

manually -20.0 — 25.0 — 150°C/°F
or

automatically

-20 — 150°C/°F

0 — 10 V / 10 — 0 V
2 — 10 V / 10 — 2 V
0 — 20 mA / 20 — 0 mA
4 — 20 mA / 20 — 4 mA

The output signal is im Bereich -20...+200°C freely scalable.
The sensor can be used in the range -10...+100°C.

≥ 2 kΩ for voltage output

Analog output
for “Alarm”

Low (0 mA / 0 V / 3.4 mA / 1.4 V) or
High (22.0 mA / 10.7 V) or
a value with a fixed setting (safe value)

5.1.4 Temperature compensation

Reference
temperature

Temperature
coefficient

Compensation
range

Function - Linear compensation (constant temperature coefficient).

15 to 30°C, adjustable

0.0 to 5.5 %/°C, adjustable

-20 to 150°C

This type of compensation can be used with normal water with an
acceptable level of accuracy. The temperature coefficient used is then
about 2,2 %/K.

- Natural water (DIN EN27888 or ISO 7888 as the case may be).
In this case, a so-called non-linear temperature compensation is used.
According to the above standard, the corresponding type of compensation
can be applied in the case of natural ground water, mountain spring water
and surface warter.

15

5 Device description

The conductivity of the water is compensated in the range from 0°C to
36°C.

- non-linear (learning function, see special functions)
Here, the actual graph of the temperature coefficient during a heating-up or
cooling-down process is determined by the transmitter.

5.1.5 Sensor

Material PP (polypropylene)

Note:

Temperature, pressure and sample medium affect the cell operating life.

Temperature of
the sample
medium

Process connection maximum medium temperature

168
706
169
607
617
690

60 °C

80 °C

short-term100 °C

Note the limiting values (ambient temperature) of the device.

Pressure 10 bar max. at 20°C

06 bar max. at 60°C

Measurement range
Sensor

0 — 500 µS/cm
0 — 1000 µS/cm
0 — 2000 µS/cm
0 — 5000 µS/cm
0 — 10 mS/cm
0 — 20 mS/cm
0 — 50 mS/cm
0 — 100 mS/cm
0 — 200 mS/cm
0 — 500 mS/cm
0 — 1000 mS/cm
0 — 2000 mS/cm

To le ra n ce

(in % of range span)

≤1%

≤0.5%

1

≤1%

16

1

not compensated for temperature

5.1.6 Approvals/approval marks

Approval mark DNV GL

Testing agency DNV GL

5 Device description

Certificate/
certification
number

Inspection
basis

Valid for Type 202755/10

TAA00001W9

DNV GL Class Guideline CG-0339

Type 202755/15

17

6 Mounting

min. 20 mm

min. 20 mm

(1)

6.1 General

Mounting site Make sure that the site is readily accessible, for calibration at a later time.

The fixing must be secure and free from vibration.
Avoid direct sunlight!
Take care that there is adequate flow through and around the sensor (1) !
If the device is to be mounted in a pipeline, there must be at least 20 mm

clearance between the sensor and the wall of the pipe.
If it is not possible to achieve this minimum clearance, then a limited
compensation can be made through the “Mounting factor” parameter.

For submerged operation in basins, a location must be chosen that is
representative of the typical conductivity or concentration.

Mounting
position

Screwing in and
unscrewing the
detached
sensor

Sensor details

The measuring transmitter can be mounted in any position.

The cable must not be twisted!

Avoid putting tension on the cable. In particular, avoid tugging it.

18

6.2 Head-mounted transmitter

Installation
variations

6 Mounting

19

6 Mounting

6.3 Split version (separate sensor)

Tran sm it ter
head

Drilling jig for
wall-mounting

20

Sensor
component

6 Mounting

21

6 Mounting

Feststellschraube

Flansch
verschiebbar

60

18

3

100

+5

0

Ø18

Ø125
Ø165

6.3.1 Separate sensor as immersion model

Optional accessory:
Flange DN 32,
part no. 00083375

Optional accessory:
Flange DN 50,
part no. 00083376

Fixing screw

Sliding
flange

22

6.3.2 Examples of installation

Version with

process connection 168

Union nut (PVC)
Insert nut
G1 / " (PVC)

1

2

Tee 90°
DN32 (PVC)

Union nut (PVC)

Insert nut
G1 / "

1

2

Tee 90°
DN40 (PVC)

Optional accessories
part no.: 00439247

Optional accessories
Sales No.: 20/00439249

Version with

process connection 168

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6 Mounting

Weld-on threaded connection

DN50, DIN 11 851

(Counterpart for process connection -607)

part no.: 00085020

23

6 Mounting

30...50 mm

(2)

(1)

(1)

6.3.3 Pipe assembly set

The screws (1) M5 x 30 are used for pipe diameters from 30 to 40 mm.
The screws (2) M5 x 40 are used for pipe diameters from 40 to 50 mm.
The pipe assembly set is also suitable for horizontal pipes..

24

7 Installation

The electrical connection must only be carried out
by properly qualified personnel!

❏ The choice of cable, the installation and the electrical connection must

conform to the requirements of VDE 0100 “Regulations on the Installation
of Power Circuits with Nominal Voltages below 1000 V” or the appropriate
local regulations.

❏ The electrical connection must only be carried out by qualified personnel.
❏ If contact with live parts is possible while working on the device, it must be

completely disconnected from the electrical supply.

❏ The electromagnetic compatibility conforms to EN 61326.
❏ Run input, output and supply cables separately and not parallel to one

another.

❏ The device is not suitable for use in areas with an explosion hazard (Ex

areas).

❏ Apart from faulty installation, incorrect settings on the instrument may also

affect the proper functioning of the subsequent process or lead to damage.

25

7 Installation

(1)

(1)

(2)

7.1 General

Opening the
operating unit

It is only necessary to open the housing for devices with cable
glands.

Devices with M12 plug/socket connectors should not be opened!

Connecting up
the cables

✱ Remove four screws (1) and take off the cover

26

To connect the single conductors, pull off the pluggable screw
terminals (1) in the operating unit.

Pass the connecting cables through the cable glands (2).

Wiring

Caution:

On devices with a
separate sensor
and M12 plug/
socket
connectors, the
screw terminals are
sealed inside the
device.

Removal of this
sealing will
invalidate the
warranty!

7 Installation

For devices with a separate sensor (type code extensions (2) /60 or /65), the
transmitter and detached sensor are matched to one another at the factory!
When connecting the components, please note that the serial number of the
external sensor (marked on the label attached to the connecting cable) must
match the serial number marked on the nameplate of the transmitter!

27

7 Installation

8

7

10

9

11

12

13

14

Connections
for the
transmitter

Connections Screw

Supply voltage

Supply voltage

19 — 31 V DC

(with reverse-polarity protection)

Outputs

Analog signal output

Conductivity/concentration

0 — 20 mA resp. 20 — 0 mA or

4 — 20 mA resp. 20 — 4 mA

or

0 — 10 V resp. 10 — 0 V or

2 — 10 V resp. 10 — 2 V

(electrically isolated)

Analog signal output

Te mp er at ur e

0 — 20 mA resp. 20 — 0 mA or

4 — 20 mA resp. 20 — 4 mA

or

0 — 10 V resp. 10 — 0 V or

2 — 10 V resp. 10 — 2 V

terminals

1 L+

2 L-

3 +

4 -

5+

6-

Conn./pin

I / 1
I / 2

I / 3
I / 4

II / 1
II / 2

(electrically isolated)

Switching output K1

(floating)

7
8

Status indication

LED K1

Switching output K2

Status indication

9

10

LED K2

Binary inputs

Binary input E1 11

12

Binary input E2 13

14

II / 3
II / 4

II / 5
II / 6

II / 7

I / 5

II / 8

I / 5

28

8.1 Function

Interface cable
(95/00350260)

Plug-on adapter

(included in setup set)

Supply voltage

8 Setup program

Configurable
parameters

Connections

The setup program, which is available as an option, can be used for easy
adaptation of the transmitter to specific requirements.

- Setting the measurement range and the range limits.

- Setting the response of the output to an out-of-range signal.

- Setting the functions of the switched outputs K1 and K2.

- Setting the functions of the binary inputs E1 and E2.

- Setting up special functions (e.g. the dilution function).

- Setting up a customer-specific characteristic,

-etc.

Data transmission from or to the transmitter can only take place
when it is connected to the electrical supply see Chapter 7
"Installation", Page 25ff.

The setup interface is not electrically isolated. When connecting
the PC interface cable, it is therefore absolutely essential to ensure
that either the supply of the transmitter or of the PC is not
electrically earthed (for instance, use a battery-powered notebook).

29

9 Commissioning

The transmitter has been tested in the factory for fault-free functioning, and is
delivered ready for operation.

9.1 Head-mounted transmitter or split version

✱ Mounting the device, see "Mounting", Page 18.
✱ Connecting the device, see "Installation", Page 25.

For devices with a separate sensor (type code extensions (2) /60 or /65), the
transmitter and detached sensor are matched to one another at the factory!
When connecting the components, please note that the serial number of the
external sensor (marked on the label attached to the connecting cable) must
match the serial number marked on the nameplate of the transmitter!

The separate sensor must be connected before switching on the transmitter!

9.2 Replacement sensor

✱ Connect up the sensor as described in the operating instructions for the

replacement sensor.

✱ Calibrate the sensor as described in the operating instructions for the

replacement sensor.

After changing the separate sensor, the voltage supply of the transmitter (with
connected sensor) must be switched off and on again!

30

10.1 Controls

(6)

(2)

(1)

(3)

(4)

(6)
(5)

PGM

EXIT

Device without
LC display

10 Operation

Device with
LC display

(1) Grafik LC display, back-lit
(2) key, confirm entries/select menu
(3) key, cancel entry without saving/cancel calibration go back one

menu level
(4) key, increase value/step on in selection
(5) key, reduce value/step on in selection
(6) LEDs K1 and K2 show the states of the switched outputs.

In normal operation, the LED lights up if the corresponding output is

active.

If the pulse function is active, the LED only indicates the status.

The K1 LED blinks during calibration.

In fault condition, the LED K1 and LED K2 blink.

31

10 Operation

(1) (2) (3) (4) (6)(5) (7)

(8)

(9)(10)

(11)

LC display

(1)
(2)
(3)

(4)

(5)
(6)

Output K1 is active
Output K2 is active
Binary input 1 is

activated
Binary input 2 is

activated
Keypad is inhibited
Device status (indications)

- Alarm (e.g overrange)

- Calib blinking (calibration
timer has run down

- Calib (customer calibration
is active)

Output mode

(7)

- Hand (manual operation)

- Hold (hold operation)
Conductivity/concentration

(8)

measurement
Unit for conductivity/

(9)

concentration measurement
Temperature of the medium

(10)

Device status e.g.

(11)

- Measurement (normal)

- Dilution (dilution function)

- Dosing (dilution function)

- Inhibited (dilution function)

- Calibration status

32

10.3 Principle of operation

10.3.1 Operation in levels

Measurement mode, see Chapter 10.4 "Principle of operation" page 35

OPERATOR LEVEL, see chapter 10.6 "Operator level", page 36

INPUT CONDUCTIVITY MEASUREMENT RANGE 1...4

TEMPERATURE COMPENSATION
TEMP. COEFFICIENT 1...4
REFERENCE TEMPERATURE
REL. CELL CONSTANT
MOUNTING FACTOR
CONCENTR. MEASUREMENT
CONCENTR. RANGE
OFFSET
FILTER TIME
CALIBR. INTERVAL

OUTPUT CONDUCTIVITY SIGNAL TYPE

SCALING START 1...4
SCALING END1...4
IN CASE OF ALARM
DURING CALIBRATION
SAFETY VALUE
MANUAL OPERATION
MANUAL VALUE

INPUT TEMPERATURE UNIT

MEAS. VALUE ACQUISITION
MANUEL SPECIFICATION
OFFSET
FILTER TIME

OUTPUT TEMPERATURE SIGNAL TYPE

SCALING START
SCALING END
IN CASE OF ALARM
DURING CALIBRATION
SAFETY VALUE
MANUAL OPERATION
MANUAL VALUE

OUTPUT BINARY 1 FUNCTION

LIMIT VALUE
HYSTERESIS
DISTANCE
MANUAL OPERATION
DURING HOLD
IN CASE OF ALARM/CALIBR.
SWITCH-ON DELAY
SWITCH-OFF DELAY
PULSE DURATION

OUTPUT BINARY 2 FUNCTION

LIMIT VALUE
HYSTERESIS
DISTANCE
MANUAL OPERATION
DURING HOLD
IN CASE OF ALARM/CALIBR.
SWITCH-ON DELAY
SWITCH-OFF DELAY

PULSE DURATION
INPUT BINARY 1 FUNCTION
INPUT BINARY 2 FUNCTION
DILUTION REDUCTION

DOSING TIME

LOCK TIME

10 Operation

33

10 Operation

DEVICE DATA LANGUAGE

CONTRAST

LIGHTING

INVERTING LCD

ADMINISTR. LEVEL, see chapter 10.6, "Operator level", page 36

Password

PAR AMET ER LEVEL

tivity input) page 37

INPUT CONDUCTIVITY

OUTPUT CONDUCTIVITY

INPUT TEMPERATURE

OUTPUT TEMPERATURE

OUTPUT BINARY 1

OUTPUT BINARY 2

INPUT BINARY 1

INPUT BINARY 2

DILUTION FUNCTION

DEVICE DATA

, see chapter 10.6.1 "CONDUCTIVITY IN" (conduc-

CALIBRATION LEVEL

REL. CELL CONSTANT
TEMP. COEFF. LINEAR
TEMP. CO. NON-LINEAR

DILUTION FUNCTION

REDUCTION
DOSING TIME
LOCK TIME

, see chapter 10.7 "Administrator level" page 44

ENABLE LEVEL

vity output), page 38

INPUT CONDUCTIVITY

OUTPUT CONDUCTIVITY

INPUT TEMPERATURE

OUTPUT TEMPERATURE

OUTPUT BINARY 1

OUTPUT BINARY 2

INPUT BINARY 1

INPUT BINARY 2

DILUTION FUNCTION

DEVICE DATA

CALIBRATION ENABLE

39

REL. CELL CONSTANT

TEMP. COEFF. LINEAR

TEMP. CO. NON-LINEAR

, see chapter 10.8 "Calibration level" page 46

, see chapter 10.6.2 "CONDUCTIVITY OUT" (conducti-

, see chapter 10.6.3 "TEMPERATURE IN", page

34

10.4 Principle of operation

Operation in
levels

10 Operation

35

10 Operation

PGM

10.5 Measurement mode

Representation In measurement mode, the conductivity is shown (compensated for the

reference temperature) or the concentration and temperature of the medium
being measured.

(1)

(2)

(1) MEASUREMENT -> Measurement mode
(2) 20.5°C -> Temperature of the sample medium
(3) 203 mS/cm -> conductivity of the medium (compensated for the

reference/ comparison temperature – usually 25°C)

(3)

10.6 Operator level

All the parameters that have been enabled by the administrator (administrator
level) can be edited in this level. All other parameters (marked by a key )
can only be read.

✱ Press the key for at least 3 seconds.
✱ Select OPERATOR LEVEL.

36

10.6.1 CONDUCTIVITY IN (Conductivity input)

10 Operation

RANGE 1 — 4

1

0 — 500 µS/cm

0 — 1000 µS/cm

0 — 2000 µS/cm
0 — 5000 µS/cm
0 — 10 mS/cm
0 — 20 mS/cm
0 — 50 mS/cm
0 — 100 mS/cm
0 — 200 mS/cm
0 — 500 mS/cm
0 — 1000 mS/cm
0 — 2000 mS/cm UNC

1

Measurement ranges 2, 3 and 4 are only used if
BINARY INPUT is configured to RANGE/TEMPCO

2

This measurement range is not temperature-compensated.

TEMP. COMPENSATION

LINEAR

NON-LINEAR (see "Non-linear temperature coefficient (ALPHA)", Page 55)
NATURAL WATER (permissible temperature range 0 to 36°C to EN 27 888)

2

TEMPCO 1 — 4

1

0 — 2.20 — 5.5%

1

Ranges 2, 3 and 4 are only used if
BINARY INPUT is configured to RANGE/TEMPCO.

REFERENCE TEMP.

15.0 to 25.0 to 30°C

REL. CELL CONSTANT

80.0 — 100.0 — 120%

MOUNTING FACTOR

80.0 — 100.0 — 120%
If it is not possible to achieve the minimum clearance of 20 mm between the

sensor and the outer wall, then a limited compensation can be made through
this parameter.

CONC. MEAS. TYPE

NO FUNCTION

NaOH
HNO3

37

10 Operation

CUSTOMIZED (values can only be entered by using the optional

setup program)

CONC. MEAS.
RANGE

For HNO

3

0 — 25 % BY WEIGHT

36 — 82 % BY WEIGHT
For NaOH

0 — 15 % BY WEIGHT

25 — 50 % BY WEIGHT

OFFSET

-100 to 0 to +100 mS/cm (+/- 10% of range)

FILTER TIME

00:00:00 — 00:00:01 — 00:00:25 H:M:S

CALIB. INTERVAL

0 — 999 DAYS (0 = switched off)

10.6.2 CONDUCTIVITY OUT (conductivity output)

SIGNAL TYPE

0 — 20 mA

4 — 20 mA

20 — 0 mA
20 — 4 mA
0 — 10 V
2 — 10 V
10 — 0 V
10 — 2 V

SCALING START 1 — 4

0 µS/cm = 4 mA

Can be set in the range being used, depending on the signal type.

1

Ranges 2, 3 and 4 are only used if

BINARY INPUT is configured to RANGE/TEMPCO.

SCALING END 1 — 4

1

1000 µS/cm = 20 mA

Can be set in the range being used, depending on the signal type.

1

Ranges 2, 3 and 4 are only used if

BINARY INPUT is configured to RANGE/TEMPCO.

1

38

DURING ALARM

LOW (0 mA / 0 V / 3.4 mA / 1.4 V)

HIGH (22 mA / 10.7 V)
SAFE VALUE (depending on the signal type)

DURING CALIBRATION

MOVING

FROZEN
SAFE VALUE

SAFE VALUE

0.0 — 4.0 — 22.0 mA (depending on the signal type)
0 — 10.7 V

MANUAL MODE

OFF

ON

10 Operation

MAN. VALUE

0.0 — 4.0 — 22.0 mA (depending on the signal type)
0 — 10.7 V

10.6.3 TEMPERATURE IN

DIMENS. UNIT

°C

°F

MEAS. MODE

SENSOR

MANUAL

MANUAL VALUE

-20.0 to 25.0 to 150°C

OFFSET

FILTER TIME

-15.0 to 0.0 to 15.0°C

00:00:00 — 00:00:01 — 00:00:25 H:M:S

39

10 Operation

10.6.4 TEMPERATURE OUT

SIGNAL TYPE

0 — 20 mA

4 — 20 mA

20 — 0 mA
20 — 4 mA
0 — 10 V
2 — 10 V
10 — 0 V
10 — 2 V

SCALING START

-20.0 to 0.0°C = 4 mA (depending on the signal type)

SCALING END

+200 to 150.0°C = 20 mA (depending on the signal type)

DURING ALARM

LOW (0 mA / 0 V / 3.4 mA / 1.4 V)

HIGH (22 mA / 10.7 V)
SAFE VALUE (depending on the signal type)

DURING CALIBRATION

MOVING

FROZEN
SAFE VALUE

SAFE VALUE

0.0 — 4.0 — 22.0 mA (depending on the signal type)
0 — 10.7 V

MANUAL MODE

OFF

ON

MAN. VALUE

0.0 — 4.0 — 22.0 mA (depending on the signal type)
0 — 10.7 V

40

10.6.5 BINARY OUTPUT 1 and BINARY OUTPUT 2

FUNCTION

NO FUNCTION

MIN. CONDUCT.
MAX. CONDUCT.
LK1 CONDUCT.
LK2 CONDUCT.
MIN. TEMP.
MAX. TEMP.
LK1 TEMP.
LK2 TEMP.
CALIB. TIMER
ALARM

10 Operation

MAX limit comparator MIN limit comparator

LK1 alarm window LK2 alarm window

Pulse contact
Trigger condition longer than
pulse duration

Pulse contact
Trigger condition shorter than
pulse duration

41

10 Operation

LIMIT

-20.0 — 0.0 — 999.0 (depending on the function, see above)

HYSTERESIS

0.0 — 0.5 — 999.0 (depending on the function, see above)

SPACING

0.0 — 999.0 (depending on the function, see above)

MANUAL MODE

OFF

ON

FOR HOLD

INACTIVE

ACTIVE
FROZEN

FOR ALARM / CALIB.

INACTIVE

ACTIVE
FROZEN

ON-DELAY

00:00:00 — 01:00:00 H:M:S

OFF-DELAY

00:00:00 — 01:00:00 H:M:S

PULSE DURATION

00:00:00 — 01:00:00 H:M:S (see above: “Function, Pulse contact”)

42

10 Operation

10.6.6 BINARY INPUT 1 and BINARY INPUT 2

FUNCTION

NO FUNCTION

HOLD/LOCK KEY
RANGE/TEMPCO.
DILUTION

Setting parameters Binary input 1 Binary input 2

Range /
temperature
coefficient
changeover

Lock keys closed X
Hold function X closed
Start dilution function close (0 - 1 edge) open
Stop dilution function open close (0 - 1 edge)

Range 1 /
TC 1

Range 2 /
TC 2

Range 3 /
TC 3

Range 4 /
TC 4

open open

closed open

open closed

closed closed

10.6.7 DILUTION (description: see "The dilution function", Page 47)

REDUCE

0 — 10 — 50%

DOSING TIME

LOCK TIME

0:00:00— 00:01:00— 18:00:00 H:M:S

0:00:00— 00:01:00— 18:00:00 H:M:S

43

10 Operation

PGM

PGM

10.6.8 DEVICE DATA

LANGUAGE

GERMAN

ENGLISH
FRENCH
ITALIAN
DUTCH
POLISH
PORTUGUESE
RUSSIAN
SWEDISH
SPANISH

CONTRAST 0 — 6 — 11

Entering the password 7485 in the administrator level will reset the
operating language to English.

LIGHTING

OFF
ON

IF OPERATED (approx. 50 s after the last key operation:

LCD INVERSE

OFF

ON

10.7 Administrator level

- All parameters can be edited (altered) in this level.

- In this level, you can also define which parameters can be edited (altered)
by a “normal” user, and/or which calibration actions are permitted.
Editable parameters can be edited in the operator level.
Non-editable parameters are marked in the operator level by a key symbol

the lighting will be switched off)

You can access the administrator level as follows:

✱ Press the key for at least 3 seconds.
✱ Use the or key to select ADMINISTRATOR LEVEL.
✱ Use or to enter the password 300.
✱ Press the key.

44

Levels within
the
administrator
level

10 Operation

10.7.1 Parameter level

The administrator can edit all parameters for the operator level in this level.
The structure “Parameter level” within the administrator level is identical to the
operator level, see "Operator level", Page 36 and the following.

10.7.2 Enable level

In this level, the administrator can define which parameters can be altered/
edited by the operator in the operator level.
The available options are READ ONLY and EDIT.
The structure “Parameter level” within the administrator level is identical to the
operator level,
see "Operator level", Page 36 and the following.

10.7.3 Calibration enable (CALIB. ENABLE)

In this level, the administrator can define whether the operator can access

- the relative cell constant

- the linear temperature coefficients

- the non-linear temperature coefficients

for calibration i.e. alteration.

45

10 Operation

PGM

10.8 Calibration level

All the calibrations that have been enabled by the administrator (administrator
level) can be carried out in this level.

✱ Press the key for at least 3 seconds.
✱ Use the or key to select CALIBRATION LEVEL.

10.8.1 REL. CELL CONSTANT (relative cell constant)

If this function has been enabled by the administrator, then the operator can
calibrate the relative cell constant of the device here;
see "Calibrating the relative cell constant", Page 51.

10.8.2 TEMPCO LINEAR (linear temperature coefficient)

If this function has been enabled by the administrator, then the operator can
calibrate the device for liquids with a linear temperature coefficient;
see "Linear temperature coefficient (ALPHA)", Page 52.

10.8.3 TEMPCO NON-LIN. (non-linear temperature coefficient)

If this function has been enabled by the administrator, then the operator can
calibrate the device for liquids with a non-linear temperature coefficient;
see "Non-linear temperature coefficient (ALPHA)", Page 55.

46

10.9 The dilution function

EXIT

10 Operation

Brief
description

Addition of
biocide

Dilution before
biocide addition

For cooling water, the conductivity is used to deduce the total salt content. If a
conductivity limit is reached (at the maximum permissible salt content/
concentration), then the cooling water must be diluted. A dilution valve is
opened, the concentrated water flows out, and is replaced by fresh water.
When the conductivity of the cooling water has fallen below the limit, the
dilution valve is closed again.

A biocide is added to the cooling water, to prevent biological growth in the
cooling system. There is no ideal setting for the amount used and the timing of
the biocide dosing. In most cases, the dosing time is used as the controlled
variable. The dosing quantity is therefore defined by the pumping rate and
duration (system-specific). The success of the biocide treatment must be
checked at regular intervals.

If a biocide that increases conductivity is added to the cooling water, this
could increase the conductivity to beyond the limit. This would cause the
dilution valve to be opened, and a portion of the added biocide would be
discharged into the waste water (possibly contravening regulations!).

To prevent this, the conductivity in the cooling system is reduced by dilution,
to, for example, 10% below the limit, before the biocide is added. The dilution
valve is then temporarily blocked.

Dilution inhibit After adding the biocide, the dilution should be inhibited for a while, until the

biocide that is present in the cooling system is mostly decomposed (observe
the statutory regulations!).

Implementation - The dilution function is only available in the “Conductivity measurement”

mode – not for concentration measurement.

- When the dilution function is activated, all the parameters that are irrelevant
for this function are switched off.

- The dilution function can be started through binary input 1 and stopped
through binary input 2, see "BINARY INPUT 1 and BINARY INPUT 2", Page

43.
The dilution function can also be stopped by using the key.

- The present status of the dilution function will be shown in the display.

- The dilution valve is controlled by output K1.

- The addition of biocide valve is controlled by output K2.

- After dilution, K1 goes to the configured hold state (dilution inhibit).

47

10 Operation

PGM

PGM

PGM

- The dilution factor can be adjusted through binary input 1, over a range
1 — 50% below the limit value. The preset value is 10% below the limit.

10.9.1 Stop dilution

All the parameters are system-dependent, and must be adjusted to suit
system requirements.

✱ Press the key for at least 3 seconds.
✱ Use the or key to select OPERATOR LEVEL; use the key to

confirm the selection.

✱ Use the or key to select BINARY INPUT; use the key to confirm

the selection.

48

10 Operation

PGM

EXIT

PGM

PGM

PGM

PGM

✱ Use the or key to select DILUTION; use the key to confirm the

selection.

✱ Change to the operator level, using the key.
✱ Use the key to select DILUTION.

✱ Confirm the selection with the key.

✱ Use the and/or keys to set the dilution factor in the range from

1 — 10 — 50% below the limit value.

✱ Confirm the selection with the key.
✱ Use the or key to select DOSING TIME; use the key to confirm

the selection.

✱ Set the dosing time with the and keys in the range from

0:00:00 — 00:01:00— 18:00:00 H:M:S.

✱ Confirm the setting with the key.

49

10 Operation

PGM

PGM

✱ Use the or key to select LOCK TIME; use the key to confirm the

✱ Set the lock time with the and keys in the range from

✱ Confirm the setting with the key.

selection.

0:00:00 — 00:01:00— 18:00:00 H:M:S.

If there is an interruption in the supply voltage during dilution, the
function will be canceled.

The dilution function will have to be restarted if it is to be
continued.

50

11.1 General

PGM

PGM

The device offers various calibration options to increase the precision.

The conductivity sensor should be cleaned and calibrated at
regular intervals (depending on the medium being measured).

The K1 LED blinks during calibration.

11.2 Calibrating the relative cell constant

In order to meet enhanced demands for precision, the cell constant must first
be calibrated.

Requirements - The supply voltage for the device must be present.

see Chapter 7 "Installation", Page 25ff.

- The sensor must be connected to the transmitter (applies to the split
version).

- The transmitter is in the measurement mode.

11 Calibration

✱ Immerse the conductivity sensor in a reference solution with a known

conductivity.

The temperature of the sample solution must remain constant
during calibration!

✱ Press the key for at least 3 seconds.
✱ Use the and keys to select CALIBRATION LEVEL; use the key to

confirm the selection.

51

11 Calibration

PGM

PGM

PGM

PGM

EXIT

EXIT

✱ Use the and keys to select REL. CELL CONSTANT; use the key

to confirm the selection.

✱ When the measurement is stable, press the key.
✱ Use the and keys to correct the indicated uncompensated

conductivity to match the known value for the reference solution.

✱ Press .

The relative cell constant calculated by the device is displayed.

✱ To accept the relative cell constant that has been determined -> press the

key for at least 3 seconds or

to reject the value -> press the key.

The transmitter is in the calibration menu.
✱ Press the key;

The transmitter is now in the measurement mode, and shows the
compensated conductivity of the reference solution.

11.3 Calibrating the temp. coefficient of the sample solution

11.3.1 Linear temperature coefficient (ALPHA)

The conductivity of any sample solution will change according to its individual
temperature coefficient.
We therefore recommend carrying out a calibration of the temperature
coefficient.

Requirements - The supply voltage for the device must be present.

see Chapter 7 "Installation", Page 25ff.

52

11 Calibration

PGM

PGM

PGM

PGM

- The sensor must be connected to the transmitter (applies to the split
version).

- The transmitter is in the measurement mode.

✱ Immerse the conductivity sensor in a sample of the solution to be

measured.

✱ Press the key for at least 3 seconds.
✱ Use the and keys to select CALIBRATION LEVEL; use the key to

confirm the selection.

✱ Use the and keys to select TEMPCO LINEAR; use the key to

confirm the selection.

✱ Use the and keys to enter the working temperature; confirm with the

key.

The working temperature must be at least 5°C above or below the
reference temperature (25.0°C).

53

11 Calibration

PGM

EXIT

EXIT

(1)

(2)

(3)

The LC display now shows

- at top (1): the selected working temperature (blinking)

- in the middle (2): the reference temperature (blinking)

- below (3): the present sensor temperature (steady)

✱ Warm up the sample medium until both the reference and the working

temperatures have been reached (the corresponding values no longer
blink).

During calibration, the rate of change of temperature for the
sample solution must not exceed
10°C/min for the device with exposed temperature sensor, or
1°C/min for the device with an internal temperature sensor.

As soon as one of the target temperatures has been reached, its
display becomes static (no longer blinking).

Calibration can also be carried out through a cooling procedure
(falling temperature). In this case, it starts above the working
temperature and finishes below the reference temperature.

The LC display now shows the derived temperature coefficient in %/°C.
To accept the temperature coefficient that has been determined -> press the

key for at least 3 seconds or

to reject the value -> press the key.
The transmitter is in the calibration menu.
✱ Press the key.

The transmitter is now in the measurement mode, and shows the
compensated conductivity of the reference solution.

54

11 Calibration

11.3.2 Non-linear temperature coefficient (ALPHA)

General Since the temperature coefficient of some media is not constant over a

sizeable temperature range, the device provides the option of subdividing a

Determining the
TC curve

temperature range (T
used for compensation in each of these range sections. This “TC curve” can
be

- edited with the setup program and transmitted to the device.

- or calibration can be performed automatically on the device.

Start

to T

) into 5 sections. A different TC value can be

End

Calculation of a
temperature
coefficient

α = temperature coefficient (TC)
γ = uncompensated conductivity

55

11 Calibration

TC curve

Temperature
compensation
with the TC
curve

Sequence for
automatic
calibration

The present temperature of the medium is applied to the TC curve to
determine the corresponding temperature coefficient,
see "TC curve", Page 56.

Intermediate values, e.g. (α

at T4) are derived through a linear interpolation.

(α

4

The derived TC is used to calculate the compensated conductivity, in the
same way as with the linear compensation.

If the measured temperature is lower than the start temperature,
the first TC is used for compensation.
If the measured temperature is higher than the end temperature,
the last TC is used for compensation.

The TC curve is automatically recorded over a temperature range that has
been defined by the user. The temperature range between the start and end
temperatures is subdivided into 5 sections of equal size.

The temperature range must be larger than 20°C, and cover the reference
temperature.
Example: Reference temperature 25°C, start temperature 18°C and end
temperature 50°C.

at Tx) between two known values (α3 at T3) and

x

56

11 Calibration

PGM

PGM

PGM

The rate of change of the temperature must not exceed

- 10°C / min. for an exposed temperature sensor, and

- 01°C / min for an internal temperature sensor.

Requirements - The supply voltage for the device must be present.

see Chapter 7 "Installation", Page 25ff.

- The sensor must be connected to the transmitter (applies to the split
version).

- The transmitter is in the measurement mode.

✱ Immerse the conductivity sensor in a sample of the solution to be

measured.

✱ Press the key for at least 3 seconds.
✱ Use the and keys to select CALIBRATION LEVEL; use the key to

confirm the selection.

✱ Use the or key to select TEMPCO NON-LIN.; use the key to

confirm the selection.

57

11 Calibration

PGM

PGM

✱ Use the and keys to enter the start temperature; confirm with the

✱ Use the and keys to enter the end temperature; confirm with the

key.

key.

The start temperature must be lower than the reference
temperature (25.0°C).

(1)

(2)

The end temperature must be at least 20°C above the start
temperature.

The transmitter will define the fixed temperature points itself. The LC display
now shows

- at top (1): the next target temperature (blinking)

- below (2): the present sensor temperature (steady)

✱ Warm up the sample medium until is it above/below the temperature that is

blinking.

58

11 Calibration

PGM

EXIT

EXIT

The next target temperature is displayed as blinking.

During calibration, the rate of change of temperature for the
sample solution must not exceed
10°C/min for the device with exposed temperature sensor, or
1°C/min for the device with an internal temperature sensor.

As soon as one of the target temperatures has been reached, its
display becomes static (no longer blinking).

✱ Warm up the sample medium until is it above the temperature that is

blinking.

✱ Repeat the procedure as often as required, until the device has determined

all 6 temperature coefficients.

The LC display now shows the derived temperature coefficients in %/°C.
✱ To accept the temperature coefficients that have been determined -> press

the key for at least 3 seconds or
to reject the values -> press the key.

The transmitter is in the calibration menu.
✱ Press the key.

The transmitter is now in the measurement mode, and shows the
compensated conductivity of the reference solution.

59

12 Maintenance

12.1 Cleaning the conductivity sensor

Do not use solvents.
Hard-to-remove crusts and deposits can be softened and removed

with dilute hydrochloric acid.

Observe the safety regulations!

Deposits Deposits on the sensor section can be removed with a soft brush (e.g. a bottle

brush).

60

13 Eliminating faults and malfunctions

Error
possibilities

t

Problem Possible cause Measures

no measurement display
or
current output

measurement display
000 or
current output 4 mA

wrong or
unstable
measurement display

supply voltage
missing

sensor not immersed in
medium,
reservoir level
too low

flow-through fitting
is blocked

sensor is faulty see "Checking the

sensor not immersed
deeply enough

inadequate mixing ensure good

supply voltage
should be checked,
also check terminals

top up the reservoir

flow-through fitting
should be cleaned

device", Page 61
top up the reservoir

mixing
for sensor: all-round
free space of approx.
5mm
ensure all-round flow

Measurement value dis­play 8888,
temperature display
"ok",
blinking

Measurement value dis­play 8888,
temperature display
8888
blinking

air bubbles check mounting site,

see "General", Page 18.

Conductivity measure­ment range overshoo­ting or conductivity mea­surement probe faulty.

Temperature measure­ment range overshoo­ting or undershooting or
short circuit or interrupti­on of the temperature
sensor.

Select suitable measure­ment range.

Replace conductivity
measuring transmitter.

The temperature of the
measuring medium must
be in the range from

0...150°C.
Replace the conductivity

measuring transmitter.
Send the device for re-

pairs.

13.1 Checking the device

General The device is calibrated at the factory, and is maintenance-free. If,

nevertheless, measurement deviations appear with no apparent cause, the
transmitter can be tested as follows.

61

13 Eliminating faults and malfunctions

R

13.1.1 Resistance loop test

Position of the
resistance loop

During calibration, do not touch the sensitive part of the cell or put
it down on any surface, otherwise the measurement will be
falsified.

✱ Lead a wire through the cell (see diagram)
✱ Connect a resistor R to the wire

Calculating the
resistance

Example 1 The measuring transmitter is to show 20 mS:

Formula for calculating the resistance of the resistance loop:

2

· K

N

R =

Lf N = No. of turns in the loop

Note: 1 mS/cm = 1·10

1 µS/cm = 1·10

For display values up to 49 mS, the loop must have 1 turn.
For display values above 50 mS, the loop must have 3 turns.

The cell constant of the device is 6.25 1/cm.

2

1

R =

·6.25 1/cm

20·10-3 S/cm

= 312.5

Ω

R = Resistance of the resistance loop

K = Cell constant
Lf = Required display in S/cm

-3

S/cm

-6

S/cm

62

To achieve a display of 20 mS/cm, the resistance loop (with 1 turn) must have
a resistance of 312.5 Ohm.

13 Eliminating faults and malfunctions

Example 2 The measuring transmitter is to show 500 mS:

2

3

R =

To achieve a display of 500 mS/cm, the resistance loop (with 3 turns) must
have a resistance of 112.5 Ohm.

Precalculated
values

·6.25 1/cm
= 112.5

500·10-3 S/cm

Required display

0 µS/cm 0 no resistance

625 µS/cm 1 10000

1000 µS/cm 1 6250 Ω
2000 µS/cm 1 3125 Ω
5000 µS/cm 1 1250 Ω

10 mS/cm 1 625 Ω
20 mS/cm 1 312.5 Ω

50 mS/cm 3 1125 Ω
100 mS/cm 3 562.5 Ω
200 mS/cm 3 281.3 Ω
500 mS/cm 3 112.5 Ω

1000 mS/cm 3 56.3 Ω
2000 mS/cm 3 28.1 Ω

Ω

Number of

turns

Required resistance

Ω

Te st
sequence

✱ Calculate the test resistance.
✱ Wire up the device, see Chapter 7 "Installation", Page 25.
✱ Select the corresponding measurement range, see Chapter 10.6.1

"CONDUCTIVITY IN (Conductivity input)", Page 37 -> RANGE 1 — 4

✱ Set TC to 0%/°C, see Chapter 10.6.1 "CONDUCTIVITY IN (Conductivity

input)", Page 37 -> TEMPCO

✱ Fit the resistance loop as shown in the diagram.

63

13 Eliminating faults and malfunctions

13.1.2 Reference liquid test

Immerse in test
solution

Te st
sequence

✱ Prepare the conductivity test solution in a container of adequate size.
✱ Wire up the device, see Chapter 7 "Installation", Page 25.
✱ Select the range appropriate to the conductivity test solution, see Chapter

10.6.1 "CONDUCTIVITY IN (Conductivity input)", Page 37 -> RANGE 1 — 4

✱ Set TC to 0%/°C, see Chapter 10.6.1 "CONDUCTIVITY IN (Conductivity

input)", Page 37 -> TEMPCO

✱ Immerse the cell in the container, and do not move it any more during the

measurement.

64

13 Eliminating faults and malfunctions

13.1.3 Reference measuring instrument test

Immerse in test
solution

Te st
sequence

✱ Prepare the conductivity test solution in a container of adequate size.
✱ Wire up the device, see Chapter 7 "Installation", Page 25.
✱ Select the range appropriate to the conductivity test solution, see Chapter

10.6.1 "CONDUCTIVITY IN (Conductivity input)", Page 37 -> RANGE 1 — 4

✱ Set TC to 0%/°C, see Chapter 10.6.1 "CONDUCTIVITY IN (Conductivity

input)", Page 37 -> TEMPCO

✱ Set the TC for the reference instrument to 0%/°C as well (see operating

instructions for the reference instrument). If this is not possible, then the
sample liquid must be tempered to the reference temperature for the
reference instrument.

✱ Immerse the cell under test and the cell for the reference instrument in the

container, and do not move them any more during the measurement.

✱ The output and display of the device under test or the attached indicator

must match the indication of the reference instrument, taking into account
acceptable device deviations.

65

14 Appendix

14.1 Before configuration

If a number of instrument parameters have to be modified in the instrument,
then it is advisable to note them in the table below, and then modify these
parameters in the sequence given.

The following list shows the maximum number of parameters that
can be altered.

Depending on the configuration, some of the parameters will not
be alterable (editable) for your device.

Parameter Selection / value range

Factory setting

Conductivity input

Range 1 0 — 500 µS/cm

0 — 1000 µS/cm
0 — 2000 µS/cm
0 — 5000 µS/cm
0 — 10 mS/cm
0 — 20 mS/cm
0 — 50 mS/cm
0 — 100 mS/cm
0 — 200 mS/cm
0 — 500 mS/cm
0 — 1000 mS/cm

0 — 2000 mS/cm (uncompensated)
Temperature
compensation

Temperature coefficient 1 0.0 to 5.5%/°C 37
Reference temperature 15.0 to 25.0 to 30°C 37
Relative cell constant 80.0 — 100.0 — 120.0% 37
Mounting factor 80.0 — 100.0 —120.0% 37
Concentration

measurement

Offset -200 to 0 to +200 mS/cm 38
Filter time 00:00:00 — 00:00:25 H:M:S 38
Calibration interval 0 — 999 days 38

Conductivity output

Signal type 0 — 20 mA

linear

non-linear

natural water

No function

NaOH

HNO

3

customer-specific

4 — 20 mA

20 — 0 mA

20 — 4 mA

0 — 10 V

2 — 10 V

10 — 0 V

10 — 2 V

New

adjustment

see page

37

37

37

38

66

14 Appendix

Parameter Selection / value range

Factory setting

Scaling start 0 — 90% = 4 mA (e.g.)

of range span
Scaling end 100 — 10% = 20 mA (e.g.)

of range span
During alarm low

high

safe value
During calibration moving

frozen

safe value
Safe value 0.0 — 4.0 — 22.0 mA 39
Manual mode off

on
Manual value 0.0 — 4.0 — 22.0 mA 39

Temperature input

Unit °C

°F
Measurement mode Sensor

manual
Manual value -20.0 to 25 to 150°C 39
Offset -15.0 to 0.0 to +15°C 39
Filter time 00:00:00 — 00:00:01 — 00:00:25

H:M:S

Temperature output

Signal type 0 — 20 mA

4 — 20 mA

20 — 0 mA

20 — 4 mA

0 — 10 V

2 — 10 V

10 — 0 V

10 — 2 V
Scaling start -20.0 to 183°C = 4 mA

(0 — 90% of range span)
Scaling end -3 to 150 to 200°C = 20 mA

(100 — 10% of range span)
During alarm low

high

safe value

New

adjustment

see page

38

38

39

39

39

39

39

39

38

38

38

38

67

14 Appendix

Parameter Selection / value range

Factory setting

During calibration moving

frozen

safe value
Safe value 0.0 — 4.0 — 22.0 mA 38
Manual mode off

on
Manual value 0.0 — 4.0 — 22.0 mA 38

Binary output 1 or binary output 2

Function No function

Conductivity MIN contact

Conductivity MAX contact

Conductivity LK1

Conductivity LK2

Temperature MIN contact

Temperature MAX contact

Temperature LK1

Temperature LK2

Calibration timer

Alarm
Limit value -20.0 — 9999.0 42
Hysteresis 0.0 — 0.5 — 999.0 42
Spacing 0.0 — 999.0 42
Manual mode off

on
For hold inactive

active

frozen
For alarm/calibration inactive

active

frozen
Switch-on delay 00:00:00 — 01:00:00

H:M:S
Switch-off delay 00:00:00 — 01:00:00

H:M:S
Pulse duration 00:00:00 — 01:00:00

H:M:S

Binary input

Function No function

Key lock/hold

Meas. range/temperature

coefficient

Dilution function

Dilution function

Reduction 0 — 10 — 50% 43
Dosing time 00:00:00 — 00:01:00 — 18:00:00

H:M:S
Lock time 00:00:00 — 00:01:00 — 18:00:00

H:M:S

New

adjustment

see page

38

38

41

42

42

42

42

42

42

43

43

43

68

14 Appendix

Parameter Selection / value range

Factory setting
Device data

Language German

English

French

Italian

Dutch

Polish

Portuguese

Russian

Swedish

Spanish
Contrast 0 — 6 — 11 44
Lighting off

on

during operation

LCD inverse off

on

New

adjustment

see page

44

44

44

69

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70

JUMO GmbH & Co. KG JUMO Instrument Co. Ltd. JUMO Process Control, Inc.

Street address:
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36039 Fulda, Germany
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