JUMO CTI-750 Operating Manual

Inductive

conductivity transmitter

in stainless steel housing

JUMO CTI-750

Type 202756

B 20.2756.0.1

Operating manual

11.07/00488788

Contents

1 Typographical conventions ...................................................... 8

1.1 Warning signs ..............................................................................................8

1.2 Attention-drawing signs ...............................................................................8

2 General ....................................................................................... 9

2.1 Foreword ......................................................................................................9

2.2 Structure of the JUMO CTI-750..................................................................10

3 Inductive conductivity measurement .................................... 11

3.1 Field of application .....................................................................................11

3.2 Function .....................................................................................................12

4 Identifying the device ............................................................. 13

4.1 Type nameplate .........................................................................................13

4.2 Type declaration ........................................................................................14

4.3 JUMO CTI-750 as "Head transmitter" ........................................................14

4.4 JUMO CTI-750 as "Transmitter with separate sensor" .............................15

5 Device description .................................................................. 17

5.1 Technical data, transmitter ......................................................................17

6 Assembly .................................................................................. 21

6.1 General ...................................................................................................... 21

6.2 Dimensions / Process connections, head transmitter ...............................22

6.3 JUMO CTI-750 with separate sensor ........................................................24

6.4 Assembly examples ...................................................................................28

7 Installation ............................................................................... 30

7.1 General ......................................................................................................31

8 Setup program ........................................................................ 34

8.1 Function .....................................................................................................34

9 Commissioning ....................................................................... 35

9.1 Head transmitter or transmitter with separate sensor ...............................35

9.2 Replacement sensor ..................................................................................35

Contents

10 Operation ................................................................................. 36

10.1 Operating elements ....................................................................................36

10.2 Principle of operation .................................................................................38

10.3 Principle .....................................................................................................40

10.4 Measurement mode ...................................................................................41

10.5 Operator level .............................................................................................41

10.6 Administrator level .....................................................................................49

10.7 Calibration level ..........................................................................................51

10.8 The desalination function ...........................................................................52

11 Calibrating ............................................................................... 56

11.1 General ...................................................................................................... 56

11.2 Calibration of the relative cell constant ......................................................56

11.3 Calibration of the temperature coefficient of the measurement solution ...57

12 Maintenance ............................................................................ 65

12.1 Cleaning the conductivity sensor ...............................................................65

13 Rectifying errors and faults ................................................... 66

13.1 Device inspection .......................................................................................66

14 Annex ....................................................................................... 72

14.1 Before configuring .................................................................................. 72

5

A

A/D-converter 17
Sediments 11, 65
Desalination reduction 53
DESALINATION FUNCTION 48
Desalination function 48, 52, 74
Desalination function: Start 48
Desalination function: Stop 48
Desalination 11
Desalination valve 52
REDUCTION 48
Reduction 74
DISTANCE 47
Distance 74
Alarm window 47
Analog output in case of "Alarm" 18–19
Connection 34
Connection layout of the transmitter 33
Weld-on threaded connector28
Display 17
OUTPUT BINARY 46
Output binary 74
OUTPUT CONDUCTIVITY 44
Output conductivity 72
OUTPUT TEMPERATURE 45
Output temperature 73
Outputs 33
Output signal 18
Output signal, temperature 19
SWITCHOFF DELAY 48
Switchoff delay 74

B

Operating in levels 40
Operation principle 38
IN CASE OF ALARM 44–45
In case of alarm 73
IN CASE OF ALARM / CALIB. 47
in case of alarm / at the time of calibration 74
IN CASE OF HOLD 47
in case of Hold 74
IN CASE OF CALIBRATION 44, 46

In case of calibration 73, 74

LIGHTING 49
Lighting 75
Calculation of a temperature coefficient 60
REFERENCE TEMPERATURE 42
Reference temperature 72
Binary inputs 33
Biocide 52
Burden 18–19

C

CIP 11
CIP-Process 11

D

DOSING TIME 48
Dosing time 74
Pressure 20

E

Levels of the Administrator level 50
MOUNTING FACTOR 43

Mounting factor 21, 72

Installation position 21
Installation variants 22
INPUT BINARY 48
input binary 74
INPUT CONDUCTIVITY 42
Input conductivity 72
INPUT TEMPERATURE 45
Input temperature 73
UNIT 45
Unit 73
SWITCH-OFF DELAY48
Switch-off delay 74
Setting parameters 48
Electrical connection 17, 30
Electromagnetic compatibility 30
Removing the pigmenting 32
Determining the TC-curve 60
explosion-endangered areas 30

F

Error possibilities 66

FILTERING TIME 43, 45
Filtering time 72, 73
FUNCTION 46, 48
Function 20, 74

G

galvanic separation 34
Housing 17
Accuracy 19–20
DEVICE DATA 49
Device data 75
Weight 17
LIMITING VALUE 47
Limiting value 74

H

MANUAL OPERATION 44, 46–47

6

Manual operation 73–74

MANUAL VALUE 44, 46

Manual value 73–74
Date of manufacture 13
Attention-drawing signs 8
Hold function 48
HYSTERESIS 47

K

CALIBR.-INTERVAL 43
Calibration interval 72
Calibration timer 18
Characteristic 19
Compensation range 19
Configurable parameters 34
Configuring 72
CONTRAST 49
Contrast 75
CONCENTR. RANGE43
CONCENTR. MEASUREMENT 43
Concentration measurement 18, 72

L

LCD INVERSE 49
LCD inverse 75
Limit comparator 46
Solvent 65

M

MANUAL SPECIFICATION 45
Manual specification 73
Material 20
MEASUREMENT RANGE 42
Measurement range 72
MEASUREMENT RANGE 1 42
Measurement range, sensor 20
Measurement range / Temperature coefficient
switching

48

Transmitter head 24
Measurement process 11
MEASUREMENT VALUE ACQUISITION 45
Measurement value acquisition 73
Installation location 21

N

natural 20
natural water 20
non-linear temperature coefficient 60

O

OFFSET 43, 45
Offset 72–73

P

Parameters, configurable 34
Password 49
Polarization 11
PULSE DURATION 48
Pulse duration 74

R

Reference fluid 70
Reference measuring instrument 71
Reference temperature 19
REL. CELL CONSTANT 42
Relative cell constant 72

S

Breaking capacity of the semiconductor relay

17

System of protection 17
Sensor part 25
Service-Hotline 9
Setup interface 34

SAFETY VALUE 44, 46
Safety value 73, 74

SIGNAL TYPE 44–45

Signal type 72–73

SCALING START 44–45
Scaling start 73
SCALING END 44–45
Scaling end 73
Sunlight radiation 21

Voltage supply 17, 33

LANGUAGE 49
Language 75

T

Keyboard lock 48
TEMP. COEFFICIENT 42
TEMP. COMPENSATION 42
Temperature of the measurement medium 20
Temperature acquisition 19
Temperature coefficient 19, 72
Temperature compensation 72
Temperature compensation with the TC-curve

61

Temperature measurement range 19
TC-curve 61

U

Influence of ambient temperature 18–19
reconfigure 72

7

V

LOCKING TIME 48
Locking time 74
Pre-calculated values 69

W

Warning signs 8
Resistant loop 67
Wiping contact 47

Z

CELL CONSTANT 42
Cell constant 72
permissible storage temperature 17
permissible ambient temperature 17

8

1 Typographical conventions

1.1 Warning signs

1.2 Indicative signs

Caution
This sign is used if, by carefully following or not following instructions, harm to

persons can occur

Caution
This sign is used if, by carefully following or not following instructions, dam-

age to devices or data can occur

Note

This sign is used when your attention is to be drawn to something special.

abc

1

Footnote

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

Flag in the text and footnote text.
The flagging in the text is done by superscript serial numbers.

✱ Action indication

This sign indicates that an activity to be carried out is being described.
The individual work steps are marked by this star.
Example:
✱ Loosen the crosshead screws..

9

2 General

2.1 Foreword

Please read the operating manual before you commission the device. Store
the operating manual at a place that is accessible for all users at all times.

Please help us to improve this operating manual.

We would be grateful for your suggestions.
Telephone[phone]

Telefax (06 61) 60 03-6 05

All the required settings are described in this manual. Should there
be any difficulties nonetheless at the time of commissioning, we
request you not to carry out any impermissible manipulations. You
could render your warranty entitlement null and void.

Please get in touch with the nearest branch or with the head office.

In case of technical queries
Service-Hotline:

Telephone:[phone] or (06 61) 60 03-6 53
Telefax: (06 61) 60 03-88 13 00 or (06 61) 60 03-88 16 53
E-mail: [e-mail]

2 General

10

2.2 Structure of the JUMO CTI-750

Examples

(1) Transmitter (4) Inductive conductivity measuring

probe

(2) Process connection (5) with or without graphics LC-display

(3) Temperature sensor

Model:

Transmitter and

conductivity measuring

probe combined,
type 202756/xx...

Model:

Transmitter w ith

separate sensor,

type 202756/xx...

(2)

(1)

(3)

(1)

(2)

(4)

(5)

(4)

(3)

11

3 Inductive conductivity measurement

3.1 Range of Applications

General The inductive measurement process allows a mostly maintenance-free acqui-

sition of the specific conductivity even in difficult medium conditions. In con­trast to the conductive measurement process, problems like electrode
replacement and polarization do not occur.

Brief descrip­tion

The device is used for the measurement / control of the conductivity / concen­trations of liquid media. Using it is particularly recommended in media in which
significant deposits from carried dirt, oil grease or of lime and gypsum are
expected. The integrated temperature measurement makes exact and fast
temperature compensation possible, which is particularly important for the
measurement of the conductivity. Additional functions such as the combined
switching of the measurement range and temperature coefficient make possi­ble the optimum use in case of CIP-processes.

Two integrated switching outputs can be freely programmed for limit value
monitoring or conductivity / concentration and /or temperature. In addition,
alarm and control tasks (desalination) can be assigned.

Operation is either via a membrane keyboard and a plain text graphical display
(user language can be changed) or via a comfortable PC-Setup program. By
simply turning the housing cover, reading the display is possible both in case
of installation in vertical or horizontal pipes. By means of the Setup program,
the device configuration data can also be saved and printed for plant docu­mentation purposes. To prevent manipulation, the device can also be supplied
without a keyboard / display. In this case, the Setup program is required for
programming.

The JUMO CTI-750 can be supplied as a combine device (transmitter and
measuring cell in one device) or as a shouldered version (transmitter and mea­suring cell connected by cables). The separate version is particularly suitable
for plants with intense vibrations and/or intense temperature radiation at the
measurement location or for installation at not easily accessible places.

Typical usage
fields

- CIP-cleaning (CIP = Clean In Place / Process)

- Concentration monitoring or chemical dosing

- Foodstuffs beverages and pharmaceutical industries

-Product monitoring (phase separation, Product / Product mixture /
Water) in the beverage industry, breweries, dairies

- Control (e.g. phase separation of cleaners / rinsing water of
cleaning processes e.g.. bottle cleaning plants and in case of container
cleaning)

3 Inductive conductivity measurement

12

3.2 Function

of the transmit­ter

The JUMO CTI-750 transmitter is conceived for use at the location. A robust
housing protects the electronics and the electrical connections from aggres­sive ambient influences (system of protection IP 67). In the standard version,
the device has one analog signal input for the conductivity / concentration and
the temperature. The further processing of the standard signals can take place
in suitable display / control devices or, e.g. directly in a PLC.

The output signals are galvanically separated from one another and from the
measurement medium.

of the measur­ing cell

The measurement of the conductivity takes place with an inductive probe. A
sinusoidal AC is supplied to the transmitting coil. Depending on the conductiv­ity of the liquid to be measured, a current is induced in the receiver coil. The
current is proportional to the conductivity of the medium. The cell constant of
the inductive probe is geometry-dependent. In addition, the cell constant can
be influenced by parts in its immediate vicinity.

(1) Plastic body (4) Measurement medium
(2) T-shaped flow channel (5) Temperature sensor Pt100
(3) Fluid loop

(2)

(1)

(3)

(4)

(5)

13

4 Identifying the device

4.1 Type nameplate

on the
transmitter

on the connect­ing
cable
(only in case of
separate sen­sor)

JUMO GmbH & Co. KG

Fulda, Germany
www.jumo.net

JUMO CTI-750
Typ: 202756/16-607-0000-82/000
VARTN: 20/00445843
F-Nr.: 00909467 01 0 0745 0001

DC 19...31 V 3W

ⱕ

F-Nr.: 00909467 01 0 0517 0001

In the case of devices with a separate sensor (base type supplementation (2)

66), for every instrument, the transmitter and the separate sensor are matched

to one another at the factory.
When connecting the components, ensure that the production number of the
external sensor (on the flag tag on the connecting cable) is identical to the pro­duction number of the transmitter (on the nameplate).

The date of manufacture is encrypted in the "F-No." :
0517 means year of manufacture 2005 / calendar week 17

4 Identifying the device

14

4.2 Type explanation

4.3 JUMO CTI-750 as "Head-mounted transmitter"

1

Only in conjunction with additional code 767 (measuring cell material
PEEK).

2

If required, M12-plug / -sockets, additional code 580 should be ordered.

3

Specify additional codes in succession separated by a comma.

4

Assembly material (mounting brackets) not part of the scope of supply.

(1) Basic type

202756 JUMO CTI-750

Inductive transmitter / switching device
for conductivity / concentration and temperature

(2) Basic type supplementation

16 Head-mounted transmitter in stainless steel housing

with display / keyboard

(3) Process connection

o 107 Stud thread G1 1/4A
o 108 Stud thread G1 1/2A
o 110 Stud thread G2A
o 606 Screwed pipe connection DN40, DIN 11 851

(MK DN50, milk cone)

o 607 Screwed pipe connection DN50, DIN 11 851

(MK DN40, milk cone)

o 608 Screwed pipe connection DN65, DIN 11 851

(MK DN65, milk cone)

o 609 Screwed pipe connection DN80, DIN 11 851

(MK DN80, milk cone)

o 617 Clamp 2 1/2"

4

o 686 VARIVENT® DN40/50

1

o 690 SMS 2"

(4) Immersion length

o 000 see "Dimensions / Process connections (head-

mounted transmitter"

(5) Electrical connection

o82Cable glands
o 83 M12-plug / -sockets

(instead of the cable glands)

2

o 84 Two cable glands M16 and a dummy plug

(6) Extra codes

3

000 None
o 268 Temperature sensor inside
X 767 Measuring cell material PEEK
X 768 Measuring cell material PVDF
o 844 Voltage supply AC 24 V

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

Ordering key / - - - / , ...
Ordering example 202756 / 16 - 607 - 000 - 82 / 000

15

4 Identifying the device

4.4 JUMO CTI-750 as "Transmitter with separate sensor"

(1) Basic type

202756 JUMO CTI-750

Inductive transmitter / switching device
for conductivity / concentration and temperature

(2) Basic type supplementation

26 Transmitter in stainless steel housing, with display / keyboard

(without sensor)

5

66 Transmitter in stainless steel housing, with display / keyboard includ-

ing sensor (cable length 10 m)

85 Replacement sensor with 10 m cable

1, 5

for transmitter in stainless steel housing

(3) Process connection

X 000 not available
o o o 107 Stud thread G1 1/4A
o o o 108 Stud thread G1 1/2A
o o o 110 Stud thread G2A
o o o 606 Screwed pipe connection DN40, DIN 11 851 (MK DN40, milk cone)
o o o 607 Screwed pipe connection DN50, DIN 11 851 (MK DN50, milk cone)
o o o 607 Screwed pipe connection DN65, DIN 11 851 (MK DN65, milk cone)
o o o 607 Screwed pipe connection DN80, DIN 11 851 (MK DN80, milk cone)
o o o 617 Clamp 2 1/2"

1

ooo 686 VARIVENT® DN40/50

2

o o o 690 SMS 2"

5

o o 706 Submerged version

6

(4) Immersion length

X 0000 see "Dimensions / Process connections (separate sensor)"
X o o 0500 0500 mm
X o o 0000 1000 mm
X o o 0000 1500 mm
X o o 0000 2000 mm
X o o xxxx Special length (in grid of 250 mm; e.g. 0250; 0750; 1250; 1750)

(5) Electrical connection

X 21 Fixed cable with M12-socket at separate sensor
o o 82 Cable glands on operating part
o o 83 M12-plug / sockets on operating part

3

o o 84 Two cable glands M16 and a dummy plug

(6) Extra codes

4

X X X 000 no extra code

o o 268 Temperature sensor inside
o o 580 1 set M12-plug / sockets
X X X 767 Measuring cell material PEEK
X X X 768 Measuring cell material PVDF
o o 844 Voltage supply AC 24 V

4 Identifying the device

16

1

Assembly material (Union / grooved nut, mounting bracket) not part of
scope of supply. If required, please order as well, see accessories.

2

Only in conjunction with additional code 767 (measuring cell material
PEEK).

3

If required, M12-plug / -sockets, additional code 580 should be ordered.

4

Specify additional codes in succession separated by a comma.

5

An equalizing set is indispensable for commissioning. If not available,
please order as well, see Accessories.

6

Only in conjunction with additional code 768 (measuring cell material
PVDF).

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

Ordering key / - - - / , ...
Ordering example 202756 / 66 - 607 - 1000 - 82 / 767

17

5 Device description

5.1 Technical data, transmitter

5.1.1 General

A/D-converter Resolution: 15-bit

sampling time:500 ms = 2 measurements/s

Voltage supply For operation on SELF- or PELV-circuits

Standard production feature:
DC 19…31 V (nominal DC 24 V), the device has reverse polarity protection

Ripple: < 5%
Power drawn with display: ≤ 3 W
Power drawn without display: ≤ 2.6 W

In case of extra code 844:
AC 24 V ±10%

Breaking capacity of the semiconductor relay
U< 50 V AC/DC

I ≤ 200 mA

electrical con­nection

Threaded plug terminals 2.5 mm

2

or M12-plug/ sockets

Display (option) Graphic-LCD with background lighting; Contrast adjustable

dimensions: 62 x 23 mm

permissible
ambient tem­perature
(transmitter)

-5…+50°C
max. 93% rel. atmospheric humidity, without thawing

permissible
storage temper­ature
(transmitter)

-10…+65°C
max. 93% rel. atmospheric humidity, without thawing

System of pro­tection
(transmitter)

IP 67

Housing Stainless steel, material no. 1.4305

Weight depending on the model and process connection

about 2.4 kg

5 Device description

18

5.1.2 Conductivity-/ Concentration transmitter

Concentration
measurement

(implemented in
the device soft­ware)

- NaOH (sodium hydroxide solution)

0...15 % by weight or 25...50 % by weight

- HNO

3

(nitric acid); pay attention to the chemical resistance of the sensor!

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

- Customer-specific concentration curve
freely programable via the setup program (see "Special functions")

Calibration
timer

adjustable: 0...999 days (0 = off)

Output ­signal
conductivity /
concentration

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.

Load ≤ 500 Ω for current output

≥ 2kΩ for voltage output

Influence of
ambient tem­perature

≤ 0.1%/K

Analog output
in case of
"Alarm"

Low (0 mA / 0 V / 3.4 mA / 1,4 V) or
High (22.0 mA / 10,7 V) or
a fixed value that can be set (safety value)

Measurement
ranges

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

Measurement ranges, transmitter

Accuracy

(in % of the start -

of measurement range)

0...500 µS/cm

≤0.5%

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

19

5 Device description

1

not temperature-compensated

Note:
The overall accuracy is formed from the accuracy of the transmitter + the
accuracy of the sensor.

5.1.3 Temperature transmitter

Temperature
acquisition

manual -20.0...25.0...150°C / °F
or
automatic

Temperature
measurement
range

-20...150°C / °F

Characteristic linear

Accuracy ≤ 0.5% of the measurement range

Influence of
ambient tem­perature

≤ 0.1%/K

Output -signal
temperature

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.

Load ≤ 500 Ω for current output

≥ 2 kΩ for voltage output

Analog output
in case of
"Alarm"

Low (0 mA / 0 V / 3.4 mA / 1,4 V) or
High (22.0 mA / 10,7 V) or
a fixed value that can be set (safety value)

5.1.4 Temperature compensation

Reference tem­perature

15...30°C adjustable

Temperature
coefficient

0.0...5.5 %/K adjustable

5 Device description

20

Compensation
range

-20...150°C

Function - Linear compensation (constant temperature coefficient).

This type of compensation can be applied with acceptable for many normal
types of water. The temperature coefficient used is then about 2.2 %/K.

- Natural water (DIN EN27888 or ISO 7888).
In this case, a so-called non-linear temperature compensation is applied.
According to the above standard, the corresponding type of compensation
can be applied in the case of natural ground waters, spring waters and
above-ground waters.
The conductivity of the water is compensated in the range from 0°C to
36°C.

- Not linear (for learning function, see special functions)
Here, the actual flow of the temperature coefficient during a heating-up or
cooling process is determined with the transmitter.

5.1.5 Sensor

Material PEEK (Polyetheretherketone) or

PVDF (Polyvenylidenfluoride)

Note!:

Temperature, pressure and measurement medium influence the life of the
measuring cell

Temperature of
the measure­ment medium

-10 ... +120°C

short-term 140°C (sterilization)

Pressure max. 10 bar

1

not temperature-compensated

Measurement range
Sensor

Accuracy

(in % of the start -

of measurement range)

0...500 µS/cm
≤1%

0...1000 µS/cm

0...2000 µS/cm

≤0.5%

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
≤1%

0...2000 mS/cm

1

21

6 Installation

6.1 General

Installation
location

The compatibility of the material with the measurement medium must be
checked by the customer.

Ensure easy accessibility for subsequent calibration.
The fastening must be secure and low-vibration.
Avoid direct sunlight.
It is necessary to pay attention to a good flow through and around the sensor

(1).
When installing in a pipe, a minimum distance of 20 mm must be maintained

from the sensor to the pipe wall.
If these minimum distances cannot be maintained, the parameter "Mounting
factor" can be used to achieve limited equalization.

In immersion operation in a basin, an installation location that is representative
for the typical conductivity or concentration must be provided.

Mounting loca­tion

The JUMO CTI-750 can be mounted in any position.

Screwing in and
unscrewing the
separate sensor

No cable twisting should occur.

Avoid tensile forces on the cable, especially jerky pulling.

Sensor details

(1)

Stainless steel sleeve: Material

1.4571

Sealing: FPM

6 Installation

22

6.2 Dimensions / Process connections, head transmitter

Installation vari­ants

Process
connection
(1.4301)

71

130

207

40

84

177

130

71

56

37

Process
connection
(1.4301)

71

130

224

20

60

104

G

Model with

process connection 607

MK DN50

Model with

process connection 617

Clamp 21/2"

(mounting bracket not part

of scope of supply)

Process
connection

Slotted union nut
F50
(1.4301)

71

84

40

212

130

Model with process connection

107 = Stud thread G1 1/4A
108 = Stud thread G1 1/2A

110 = Stud thread G2A

Version with

process connection 686

VARIVENT® DN50

(mounting bracket not

in scope of supply)

23

6 Installation

Process
connection
(1.4301)

Ring nut
SMS 2"
(1.4301)

130

71

215

84

40

Model with

process connection 690

SMS 2"

6 Installation

24

6.3 JUMO CTI-750 with separate sensor

Tran sm it te r­head

Wall fastening

ø110

84

71

176

100

91

120

ø5.5

120

100

25

6 Installation

Sensor part

Process
connection
(1.4301)

M12 socket
(PBT / PA)

Cable gland
M16 (PA)

M12 socket
(PBT / PA)

Cable gland
M16 (PA)

M12 socket
(PBT / PA)

Cable gland
M16 (PA)

Process connection 686
VARIVENT DN50
(1.4301)

®

M12 socket
(PBT / PA)

Cable gland
M16 (PA)

Shouldered version with
process connection 607

MK DN50

(union nut not part

of scope of supply)

Shouldered version with
process connection 686

VARIVENT

®

DN50

(mounting bracket not

in scope of supply)

Shouldered version with
process connection 617

Clamp 21/2"

(mounting bracket not part

of scope of supply)

Shouldered version with

process connection
107 = Stud thread G1 1/4A
108 = Stud thread G1 1/2A

110 = Stud thread G2A

6 Installation

26

M12 socket
(PBT / PA)

Cable gland
M16 (PA)

Process
connection
(1.4301)

Shouldered version with
process connection 690

SMS 2"

(union nut not part

of scope of supply)

27

6 Installation

6.3.1 Separate sensor as submerged version

M12 socket
(PBT/PA)

Cable gland
System of protection
IP68 up to 0,2 bar)
according to EN 60529
(PA)

110

Submerged
pipe
(PVDF)

ø40

EL = Submerged length

44

Shouldered version with
process connection 706

Immersion version

(pipe clamps not part of the scope of supply)

57

18

3

100

+5

0

Fixing screw

Flange mov

a

ø

100

ø

165

ø

18

Fixing screw

Flange
movable

60

18

3

100

+5

0

ø

18

ø

125

ø

165

Optional accessories:

Flange DN 32, Sales no.: 20/00083375

Optional accessories:

Flange DN 50, Sales no.: 20/00083376

6 Installation

28

6.4 Installation examples

Process connection 607
Screwed pipe fitting DN50,
DIN 11 851
(MK DN50, Milk cone)
(1.4301)

Ring nut DN50
(1.4301)

Threded pipe adapter
DIN. S, DN50
(Edelstahl)

Reducing Tee DIN, short SSS DN65/50
(e.g. 1.4301)
(to be provided by the plant operator supplied bynot JUMO)

Tee DIN 11 852, SSS
DN50
Dim. A shortened to 30 mm

Process sonnection 607
Screwed pipe fitting DN50
DIN11 851
(MK DN50, Milk cone)
(1.4301)

Flow direction

Process connection 617
Clamp 21/2"
(1.4301)

Clamping ring
(e.g. 1.4301)

Threaded pipe adapter, S
DN2,5"
(stainless steel)

Reducing Tee DIN, short SSS DN65/50
(e.g. 1.4301)
(to be provided by the plant operator supplied bynot JUMO)

Weld-on threaded connector

DN50, DIN 11 851

(counter-piece to process connection

-607)

Sales no.: 20/00085020

29

6 Installation

Tee DIN, short SSS DN65/50
(e.g. 1.4301)
(to be provided by the plant operator supplied bynot JUMO)

30

7 Installation

❏ When selecting the conductor material for the installation and for the elec-

trical connections of the device, compliance is required with the specifica­tions of VDE 0100 "Regulations governing the installation of heavy-current
systems with rated voltages below 1000 V" or the relevant country specifi­cations.

❏ The electrical connections may only be set up by technically qualified per-

sonnel.

❏ Completely isolate the device from the main supply, if live parts can be

touched while working.

❏ The electromagnetic compatibility corresponds to EN 61326.
❏ The input, output and supply cables must be laid spatially separated from

one another and not parallel to one another.

❏ The device is not suitable for installation in explosion-endangered areas.
❏ Apart from faulty installation, wrongly set values on the device can also

have an adverse impact on the following process in its proper functioning,
or result in damage.

❏ The device must be grounded:

Head-mounted transmitters:
e.g. indirectly above a metallic pipe.
Transmitter with separate sensor:
e.g. indirectly above a metallic pipe or above the wall fastening.

The electrical connections may only be set up by technically
qualified personnel.

31

7 Installation

7.1 General

Open the oper­ating unit

✱ Unscrew the cover (1)

Connect the
cables

(1)

For connecting the individual cores, pull out the threaded plug
terminals (1) in the operating unit.

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

(1)

(2)

SETUP

7 Installation

32

Wiring

Wiring sugges­tion, head­mounted trans­mitter

Wiring sugges­tion
Tran sm it te r
with separate
sensor

Caution:

In the case of devices with a separate sensor and M12-plugs/ -sockets, the
threaded terminals in the device are pigmented.

Removing the pigmenting will result in the warranty being rendered null and
void.

In the case of devices with a separate sensor (base type supplementation (2) /65
or /60), for every instrument, the transmitter and the separate sensor are matched
to one another at the factory.
When connecting the components, ensure that the production number of the
external sensor (on the flag tag on the connecting cable) is identical to the pro­duction number of the transmitter (on the nameplate).

Cable gland
M16 (PA)

Cable gland
M12 (PA)

Supply and signal output
(conductivity and temperature)
Cable gland
M12 (PA)

Binary input

Switching outputs

Connector I
Supply and signal output
(conductivity and concentration)
M12 built-in plug conn.
5-pole

Connector II
Signal output temperature
and binary input
Switching outputs
M12 built-in socket conn.
8-pole

Connector III
Inductive sensor
M12
8-pole

built-in socket conn.

33

7 Installation

Connection lay­out of the trans­mitter

Connection Threaded

terminals

Plug / Pin

Voltage supply

Standard production feature:
Voltage supply
DC 19…31 V
(with polarity reversal protection)

In case of extra code 844:
AC 24 V

1 L+

2 L-

I / 1
I / 2

Outputs

analog signal output
conductivity/ concentration

0...20 mA or 20...0 mA or

4...20 mA or 20...4 mA
or

0...10 V or 10...0 V or

2...10 V or 10...2 V
(galvanically separated)

3 +

4 -

I / 3
I / 4

analog signal output
temperature

0...20 mA or 20...0 mA or

4...20 mA or 20...4 mA
or

0...10 V or 10...0 V or

2...10 V or 10...2 V
(galvanically separated)

5+

6-

II / 1
II / 2

Switching output K1
(potential-free)
Switch position indication
LED K1

7
8

II / 3
II / 4

Switching output K2
Switch position indication
LED K2

9

10

II / 5
II / 6

Binary inputs

Binary input E1 11

12

II / 7

I / 5

Binary input E2 13

14

II / 8

I / 5

8

7

10

9

11

12

13

14

34

8 Setup-Program

8.1 Function

Configurable
parameters

With the optional Setup program that is available, the transmitter can be com­fortably matched to the requirements.

- Setting the measurement range and the measurement range limits.

- Setting the behavior of the outputs in case of overshooting of the measure­ment range.

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

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

- Setting special functions (e.g. desalination function).

- Setting a customer-specific characteristic

-etc.

Connection

Data transmission from and to the transmitter can only take place if
the voltage supply is connected to it see chapter 7 "Installation",
page 30ff.

The Setup interface does not have any galvanic isolation. There­fore, when connecting the PC interface cable, it is imperative to
ensure that either the voltage supply of the transmitter or of the PC
are not electrolytically coupled to the ground (e.g. notebook
should be used in battery mode).

SETUP

PC interface cable

TN 70/00350260 or 70/00456352

Inserted adapter

(present in the Setup set)

Voltage supply

35

9 Commissioning

9.1 Head transmitter or transmitter with separate sensor

✱ Install the device, see "Installation", page 21.
✱ Connect the device, see "Installation", page 30.

9.2 Replacement sensor

✱ Connect the sensor, see the operating manual of the replacement sensor.
✱ Calibrate the sensor, see the operating manual of the replacement sensor.

The measuring transmitters are checked in the factory for flawless
operability and shipped ready for operation.

In the case of devices with a separate sensor (base type supplementation (2)

66), for every instrument, the transmitter and the separate sensor are matched

to one another at the factory.
When connecting the components, ensure that the production number of the
external sensor (on the flag tag on the connecting cable) is identical to the pro­duction number of the transmitter (on the nameplate).

36

10 Operation

10.1 Operating elements

JUMO CTI-750
with and with­out
LC-Display

(1) Graphical LC-display,

background lit up.

(2) Key

confirm inputs, select menu.

(3) Key

interrupt inputs without saving /
interrupt calibration.
One menu-level back.

(4) Key

increase numerical value /
forward the selection.

(5) Key

decrease numerical value /
forward the selection.

(1)

(2)
(3)

(4)

(5)

(5)

PGM

EXIT

(6) LEDs "K1" / "K2" indicate the

status of the switching outputs.
In normal operation, the LED
flows when the corresponding
switching output is active.
If the wiper function is acti­vated, the LED only indicates
the status.

The LED "K1" flashes during the
calibration.
In case of an error, LEDs "K1" and
LED "K2".flash.

37

10 Operation

LC-Display

(1)
(2)
(3)

(4)

(5)
(6)

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

triggered
Binary input 2 is

triggered
Keyboard is locked
Device status (hints)

- Alarm (e.g. overrange)

- Calib. flashing (calibration
timer

run out)

- Calib (customer calibration
enabled)

(7)

(8)

(9)

(10)
(11)

Output mode

- manual (manual operation)

- hold (hold operation)
Conductivity /concentration-

measured value
Unit of the conductivity- /con-

centrations measured value
Medium temperature
Device status e.g.

- Measurement (normal)

- Desalination (desalination
function)

- Dosing (desalination function)

- Locked (desalination function)

- Status of the calibration

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

(8)

(9)(10)

(11)

10 Operation

38

10.2 Operation principle

10.2.1 Operating in levels

Measurement mode, see chapter 10.4 "Measurement mode", page 41

OPERATOR LEVEL, see chapter 10.5 "Operating level", page 41

INPUT CONDUCTIVITY MEASUREMENT RANGE 1...4

TEMP.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 END 1...4
IN CASE OF ALARM
IN CASE OF CALIBRATION
SAFETY VALUE
MANUAL OPERATION
MANUAL VALUE

INFLOW TEMPERATURE UNIT

MEASURED VALUE ACQUISITION
MANUAL SPEC.
OFFSET
FILTERING TIME

OUTFLOW TEMPERATURE SIGNAL TYPE

SCALING START
SCALING END
IN CASE OF ALARM
AT TIME O F C A L I B R AT I O N
SAFETY VALUE
MANUAL OPERATION
MANUAL VALUE

OUTPUT BINARY 1 FUNCTION

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

OUTPUT BINARY 2 FUNCTION

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

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

DOSING TIME

LOCKING TIME

10 Operation

39

DEVICE DATA LANGUAGE

CONTRAST

LIGHTING

LCD INVERSE

ADMINISTR.-LEVEL, see chapter 10.6 "Administrator level", page 49

Password

PAR AMET ER-L EVEL

, see chapter 10.6.1 "Parameter level", page 50
INPUT CONDUCTIVITY.
OUTPUT CONDUCTIVITY
INPUT TEMPERATURE
OUTPUT TEMPERATURE
OUTPUT BINARY 1
OUTPUT BINARY 2
INPUT BINARY 1
INPUT BINARY 2
DESALINATION FUNCTION
DEVICE DATA

ENABLE LEVEL

, see chapter 10.6.2 "Release level", page 50
INPUT CONDUCTIVITY.
OUTPUT CONDUCTIVITY
INPUT TEMPERATURE
OUTPUT TEMPERATURE
OUTPUT BINARY 1
OUTPUT BINARY 2
INPUT BINARY 1
INPUT BINARY 2
DESALINATION FUNCTION
DEVICE DATA

CALIB ENABLE

, see chapter 10.6.3 "Calibration release (CALIB.­RELEASE)", page 50

REL. CELL CONST.
TEMP. COEFF.. LINEAR
TEMP. COEFF. N-LINEAR

CALIBR.-LEVEL

, see chapter 10.7 "Calibration level", page 51
REL. CELL CONST.
TEMP. COEFF.. LINEAR
TEMP. COEFF. N-LINEAR

DESALINATION FUNCTION

, see chapter 10.8 "The desalination function", page 52
REDUCTION
DOSING TIME
LOCKING TIME

10 Operation

40

10.3 Principle

Level

41

10 Operation

10.4 Measurement mode

Depiction In the measurement mode, the conductivity compensated to the reference

temperature, or the concentration, and the temperature of the measurement
medium are displayed.

10.5 Operating level

In this level, all the parameters that have been released by the Administrator
(Administrator level) can be edited. All the other parameters (marked by a key

) can only be read.

✱ Press the key for longer than 3 seconds.
✱ Select "OPERATOR LEVEL".

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

(referred to the reference temperature, generally 25°C).

PGM

(1)

(2)

(3)

10 Operation

42

10.5.1 INPUT CONDUCTIVITY (Input conductivity)

MEASUREMENT 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 UNK

2

1

The measurement ranges 2, 3 and 4 are only used if
"INPUT BINARY" is configured on "MEASUREMENT RANGE./TEMP C.".

2

This measurement range is not temperature-compensated.

TEMP. COMPENSATION

LINEAR

NON-LINEAR (see "Non-linear temperature coefficient (ALPHA)", page 60)
NAT WATERS (permissible temperature range 0...36°C according to EN 27

888)

TEMP. COEFFICIENT 1...4

1

0...2.20...5.5%

1

The ranges 2, 3 and 4 are only used if
"INPUT BINARY" is configured on "MEASUREMENT RANGE./TEMP C.".

REFERENCE TEMPERATURE

15.0...25.0...30°C

CELL CONSTANT

2.00...6.80...10.0 1/cm
Checking or changing is only necessary if there is a substitute sensor (base

type supplementation 85) connected to the transmitter with a separate sensor.
The cell constant is printed on the substitute sensor (K=x,xx).

REL. CELL CONSTANT

80.0...100.0...120%

43

10 Operation

MOUNTING FACTOR

80.0...100.0...120%
If the minimum distances (20 mm) of the sensor to the outer wall cannot be

maintained, a limited compensation can be achieved with this parameter.

CONCENTR. MEASUREMENT

NO FUNCT.

NaOH
HNO3
CUST. SPEC. (The input of the values is only possible with the optional

Setup program)

CONCENTR.
RANGE

In case of HNO

3

0...25 % by WEIGHT

36...82 % by WEIGHT
In case of NaOH

0...15 % by WEIGHT

25...50 % by WEIGHT

OFFSET

-100...0...+100 mS/cm (+/- 10% of the measurement range)

FILTERING TIME

00:00:00...00:00:01...00:00:25 H:M:S

CALIBR.-INTERVAL

0...999 DAYS (0 = switched off)

10 Operation

44

10.5.2 OUTPUT CONDUCTIVITY. (Output conductivity)

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

1

0 µS/cm = 4 mA

Can be set in the current measurement range, depending on the signal type

1

The ranges 2, 3 and 4 are only used if

"INPUT BINARY" is configured on "MEASUREMENT RANGE./TEMP C.".

SCALING END 1...4

1

1000 µS/cm = 20 mA

Can be set in the current measurement range, depending on the signal type

1

The ranges 2, 3 and 4 are only used if

"INPUT BINARY" is configured on "MEASUREMENT RANGE./TEMP C.".

IN CASE OF
ALARM

LOW (0 mA / 0 V / 3,4 mA / 1,4 V)

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

AT THE TIME OF CALIBRATION

ACCOMPANYING

FROZEN
SAFETY VALUE

SAFETY VALUE

0,0...4,0...22,0 mA (depending on the signal type)

0...10,7 V

MANUAL OPERATION

off

on

MANUAL VALUE

0,0...4,0...22,0 mA (depending on the signal type)

0...10,7 V

45

10 Operation

10.5.3 INFLOW TEMPERATURE

UNIT

°C

°F

MEASUREMENT VALUE ACQUISITION

Sensor

manual

MANUAL SPECIFICATION

-20.0...25.0...150.0°C

OFFSET

-15.0...0.0...+15.0°C

FILTERING TIME

00:00:00...00:00:01...00:00:25 H:M:S

10.5.4 OUTFLOW TEMPERATURE

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 ... 0.0°C = 4 mA (depending on the signal type)

SCALING END

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

IN CASE OF ALARM

LOW (0 mA / 0 V / 3,4 mA / 1,4 V)

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

10 Operation

46

AT THE TIME OF CALIBRATION

ACCOMPANYING

FROZEN
SAFETY VALUE

SAFETY VALUE

0,0...4,0...22,0 mA (depending on the signal type)

0...10,7 V

MANUAL OPERATION

off

on

MANUAL VALUE

0,0...4,0...22,0 mA (depending on the signal type)

0...10,7 V

10.5.5 OUTPUT BINARY 1 and OUTPUT BINARY 2

FUNCTION

NO FUNCTION

COND. MIN.
COND. MAX.
COND. LK1
COND. LK2
TEMP. MIN.
TEMP. MAX.
TEMP. LK1
TEMP. LK2
CALIBR. TIMER
ALARM

Max limit comparator Min limit comparator

Hysteresis

Cond.

On

Off

Limit value
Setpoint

Hysteresis

Limit value
Setpoint

Cond.

On

Off

47

10 Operation

LIMIT VALUE

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

HYSTERESIS

0.0...1.0...999.0 (depending on the function, see above)

DISTANCE

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

MANUAL OPERATION

OFF

ON

IN CASE OF HOLD

INACTIVE

ACTIVE
FROZEN

IN CASE OF ALARM / CALIB.

INACTIVE

ACTIVE
FROZEN

Alarm window LK1 Alarm window LK2

Wiper contact
Triggering condition longer than
pulse duration

Wiper contact
Triggering condition shorter than
pulse duration

Hysteresis

Cond.

On

Off

Limit value
Setpoint

Distance

Hysterese

Sollwert

Lf

Ein

Aus

Grenzwert

Abstand

10 Operation

48

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 (see above: "Function, wiping contact)

10.5.6 INPUT BINARY 1 and INPUT BINARY 2

FUNCTION

NO FUNCTION

KEYBOARD LOCK/HOLD
MEASUREMENT RANGE./TEMP C.
DESALINATION FUNCTION.

10.5.7 DESALINATION FUNCTION (Description see "The desalination function", page

52)

REDUCTION

0...10...50%

DOSING TIME

0:00:00...00:01:00...18:00:00 H:M:S

LOCKING TIME

0:00:00...00:01:00...18:00:00 H:M:S

Setting parameters binary input 1 binary input 2

Measurement range- /
Temperature­coefficient
switching

MB1 / Tk1 open open
MB2 / Tk2 closed open
MB3 / Tk3 open closed

MB4 / Tk4 closed closed
Keyboard lock closed X
Hold-function X closed
Desalination function: Start close (flank 0 - 1) open
Desalination function Stop open close (flank 0 - 1)

49

10 Operation

10.5.8 DEVICE DATA

LANGUAGE

GERMAN

ENGLISH
FRENCH
SPANISH
POLISH
SWEDISH
ITALIAN
PORTUGUESE
DUTCH
RUSSIAN

CONTRAST

0...6...11

LIGHTING

OFF
ON
FOR OPERATION (about 50 s after the last keystroke,

the lighting gets switched off)

INVERSE LCD

OFF

ON

10.6 Administrator level

- All the parameters can be edited in this level.

- In this level, it is also possible to determine which parameters a "normal"
user may edit or which calibrations may be carried out.
Editable parameters can be edited in the operator level.
Non-editable parameters are marked in the operator level with a key sym­bol .

You can get to the Administrator level as follows:

✱ Press the key for longer than 3 seconds.
✱ With the keys or , select "ADMINISTRATOR-LEVEL".
✱ Keys or input the password 300.
✱ Press the key .

By inputting the password 7485 in the Administrator level, the
operating language is reset to English.

PGM

PGM

10 Operation

50

Levels of the
Administrator
level

10.6.1 Parameter level

In this level, the Administrator can edit any parameter of the operator level.
The structure of the parameter level in the Administrator level is identical to the
operator level
see "Operating level", page 41 and onwards.

10.6.2 Release level

In this level, the Administrator can determine which parameters the operator is
permitted to modify in the operator level..
The options "READ ONLY" and "EDIT" are available for the purpose.
The structure of the parameter level in the Administrator level is identical to the
operator level
see "Operating level", page 41 and onwards.

10.6.3 Calibration release (CALIB.-RELEASE)

In this level, the Administrator can specify whether the operator may calibrate

- the relative cell constant

- the linear temperature coefficient

- the non-linear temperature coefficient

51

10 Operation

i.e. change them

10.7 Calibration level

In this level, the calibrations released by the Administrator (Administrator level)
can be carried out.

✱ Press the key for longer than 3 seconds.
✱ With the keys or , select "CALIBRATION-LEVEL".

10.7.1 REL. CELL CONSTANT. (relative cell constant)

If this function has been released by the Administrator, the operator can cali­brate the relative cell constant of the JUMO CTI-750 here;
see "Calibration of the relative cell constant", page 56.

10.7.2 TEMP. COEF. LINEAR (Temperature coefficient linear)

If this function has been released by the Administrator, the operator can cali­brate the JUMO CTI-750 on fluids with linear temperature coefficients;
see "Linear temperature coefficient (ALPHA)", page 57.

10.7.3 TEMP. CO. N-LINEAR (Temperature coefficient, non-linear)

If this function has been released by the Administrator, the operator can cali­brate the JUMO CTI-750 on fluids with non-linear temperature coefficients;
see "Non-linear temperature coefficient (ALPHA)", page 60.

PGM

10 Operation

52

10.8 The desalination function

Brief descrip­tion

In the case of cooling water, using the conductivity, the total salt content is
assessed. Upon reaching a limiting conductivity (at maximum permissible salt
concentration / densification), dilution of the cooling water is necessary. For
this purpose, a desalination valve is opened, densified water flows out and is
supplemented with fresh water. After the conductivity of the cooling water has
dropped below the limit value, the desalination valve is closed again.

Addition of bio­cide

In order to prevent biological growth in cooling systems, biocides are added to
the cooling water. There is no ideal control variable for the added quantity and
time of a biocide dosing. In most cases, the dosing time is used as the control
variable. Here, the dosing quantity is obtained from the pump capacity and
pump operating time (plant-specific). The success of the biocide treatment
must be checked at regular intervals.

Desalination
before the addi­tion of biocide

If a conductivity-enhancing biocide is added to the cooling water, the conduc­tivity can cross the limit value as a result. Thereupon, the desalination valve
would open and a part of the added biocide would be discharged into the
effluent canal (note and comply with the legal conditions!).

To prevent this, before adding the biocide, the conductivity in the cooling sys­tem is reduced by desalination by about 10% below the limit value. Thereafter,
the desalination valve is temporarily blocked.

Desalination
locking

After the addition of the biocide, the desalination should be blocked till the
biocide that has been added has mostly decomposed in the cooling system
(not and comply with the legal requirements.).

Realization in
the case of the
JUMO CTI-750

- The desalination function is only possible in the mode "Conductivity mea­surement". Not in the case of concentration measurement..

- If the desalination function is activated, all the parameters that are not rele­vant for this function are turned off.

- The desalination function can be started via the binary input 1 and stopped
using the binary input 2, see "INPUT BINARY 1 and INPUT BINARY 2",
page 48.
The desalination function can also be stopped with the key.

- The current status of the desalination function is shown in the display.

- The desalination valve is controlled through output K1.

- The addition of biocide is controlled via output K2.

- After the desalination, K1 goes into the configured Hold state (desalination
locking).

EXIT

53

10 Operation

- The desalination reduction can be set in the range from 1...50% below the
actual limit value of binary input 1. The default setting is 10% below the
limit value.

10.8.1 Setting the desalination function

All the parameters are plant-dependent and must be matched to the prevalent
conditions.

✱ Press the key for longer than 3 seconds.
✱ With the keys or , select the "OPERATOR LEVEL"; with key , con-

firm the selection.

✱ With the keys or , select "INPUT BINARY"; with key , confirm the

selection.

PGM

PGM

PGM

10 Operation

54

✱ With the keys or , select "DESALINATION FUNCT.". with key ,

confirm the selection.

✱ Use the key to switch to the operator level.
✱ With the key select "DESALINATION FUNCTION".

✱ With key , confirm the selection.

✱ Set the desalination reduction with the keys or in the range from

1...10...50% below the actual limit value.

✱ with key , confirm the setting.
✱ With the keys or , select "DOSING TIME"; with key , confirm the

selection.

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

0:00:00...00:01:00...18:00:00 H:M:S.

✱ with key , confirm the setting.

PGM

EXIT

PGM

PGM

PGM

PGM

55

10 Operation

✱ With the keys or , select "LOCKING TIME"; with key , confirm the

selection.

✱ Set the locking time with the keys or in the range from

0:00:00...00:01:00...18:00:00 H:M:S.

✱ with key , confirm the setting.

If there is a failure of the supply voltage during the running of the
desalination function, the function is canceled.

In order that the desalination function can run again, it must be
started again.

PGM

PGM

56

11 Calibration

11.1 General

For increasing the accuracy, the device has various calibration options.

11.2 Calibration of the relative cell constant

In case of increased demands on the accuracy, the cell constant must first be
calibrated.

Precondition - the JUMO CTI-750 must be supplied with power.

see chapter 7 "Installation", page 30ff.

- The sensor must be connected to the transmitter (in case of "shouldered"
construction).

- The transmitter is in "Measurement mode".

✱ Submerge the conductivity sensor in a reference solution of known conduc-

tivity.

✱ Press the key for longer than 3 seconds.
✱ With the keys or , select "CALIBRATION-LEVEL". With key , con-

firm the selection.

At regular intervals (depending on the measurement medium), the
conductivity sensor must be cleaned and calibrated.

The LED "K1" flashes during the calibration.

During the calibration, the temperature of the measurement solu­tion must remain constant.

PGM

PGM

57

11 Calibration

✱ With the keys or , select "REL. CELL CONSTANT.". with key ,

confirm the selection.

✱ When the measured value is stable, press the key.
✱ With the keys or , correct the displayed uncompensated conductiv-

ity value to the conductivity value of the reference solution.

✱ Press the key.

The relative cell constant calculated by the JUMO CTI-750 is displayed.

✱ Accept the relative cell constant determined -> press the key for longer

than 3 seconds, or
discard the value -> press the key .

The transmitter is in the "Calibration menu".
✱ Press key ;

The transmitter is in "Measurement mode" and displays the compensated
conductivity of the reference solution.

11.3 Calibration of the temperature coefficient of the mea­surement solution

11.3.1 Linear temperature coefficient (ALPHA)

The conductivity of any measurement solution changes according it its spe­cific temperature coefficient.
We therefore recommend carrying out the calibration of the temperature coef­ficient

PGM

PGM

PGM

PGM

EXIT

EXIT

11 Calibration

58

Precondition - the JUMO CTI-750 must be supplied with power.

see chapter 7 "Installation", page 30ff.

- The sensor must be connected to the transmitter (in case of "shouldered"
construction).

- The transmitter is in "Measurement mode".

✱ Submerge the conductivity sensor in a sample of the measurement solu-

tion.

✱ Press the key for longer than 3 seconds.
✱ With the keys or , select "CALIBRATION-LEVEL". with key , con-

firm the selection.

✱ With the keys or , select "TEMP. COEFF LINEAR". with key , con-

firm the selection.

✱ With the keys or , input the operating temperature and confirm with

the key .

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

PGM

PGM

PGM

PGM

59

11 Calibration

The LC-Display now shows

- at the top (1) the selected operating temperature (flashing)

- below that (2) the reference temperature (flashing)

- below that (3) the current sensor temperature (static)

✱ Heat the measurement medium till both the reference temperature as well

as the operating temperature are reached (the corresponding value does
not flash any more).

The LC-display now shows the determined temperature coefficient in %/K.
Accept the temperature coefficient determined -> press the key for longer

than 3 seconds, or
discard the value -> press the key .

The transmitter is in the "Calibration menu".
✱ Press key ;

The transmitter is in "Measurement mode" and displays the compensated
conductivity of the reference solution.

During the calibration, the temperature changing speed of the
measurement solution of
10 K/min in the case of JUMO CTI-750 with a free-standing tem­perature sensor or
1 K/min in the case of JUMO CTI-750 with an integrated tempera­ture sensor
must not be exceeded.

As soon as one of the target temperatures is reached, its display
becomes static (not flashing).

Calibration is also possible in the cooling process (under dropping
temperature). The start is made above the operating temperature,
the end below the reference temperature.

PGM

EXIT

EXIT

(1)

(2)

(3)

11 Calibration

60

11.3.2 Non-linear temperature coefficient (ALPHA)

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

temperature range, the JUMO CTI-750 has the facility to divide a temperature
range (T

start

to T

end

) into 5 sub-ranges. In each of these ranges, compensation

can be carried out with different TC values. This so-called TC curve can

- be edited with the Setup program and transmitted to the device

- or calibrated automatically at the device.

Determining the
TC-curve

Calculation of a
temperature
coefficient

α = Temperature coefficient (TC)
γ = uncompensated conductivity

γ

Ref

T=T

Start 1

Temperature

Uncompensated

conductivity

γ

2

T

2

T

Ref

T=T

End 6

T

5

T

3

T

4

1

2

3

4

5

61

11 Calibration

TC-curve

Temperature
compensation
with the TC­curve

With the help of the current medium temperature, the corresponding tempera­ture coefficient is determined from the TC curve,’
see "TC-curve", page 61.

Intermediate values, e.g. (α

x

in the case of Tx) between two determined values

(α

3

in the case of T3) and (α4 in the case of T4) are approximated linearly.

With the TC determined, the compensated electric conductance is calculated
as in the case of the linear temperature compensation.

Sequence of the
automatic
calibration on
the JUMO CTI­750

The TC curve is plotted automatically in a temperature range determined by
the user. Here, the temperature range from the starting to the final temperature
is divided into 5 equal sections.

The temperature range must be greater than 20 Kelvin and overlap the refer­ence temperature.
Example: Reference temperature 25°C, starting temperature 18°C and final
temperature 50°C.

If the measured temperature is less than the starting temperature,
compensation is done with the first TC.
If the measured temperature is greater than the final temperature,
compensation is done with the last TC.

11 Calibration

62

Precondition - the JUMO CTI-750 must be supplied with power.

see chapter 7 "Installation", page 30ff.

- The sensor must be connected to the transmitter (in case of "shouldered"
construction).

- The transmitter is in "Measurement mode".

✱ Submerge the conductivity sensor in a sample of the measurement solu-

tion.

✱ Press the key for longer than 3 seconds.
✱ With the keys or , select "CALIBRATION-LEVEL". with key , con-

firm the selection.

✱ With the keys or , select "TEMPCO. N-LINEAR". with key , con-

firm the selection.

The temperature changing speed may not exceed

- 10 K/min in case of a free-standing temperature sensor and

- 01 K/min in case of an integrated temperature sensor
!

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63

11 Calibration

✱ With the keys or , input the starting temperature and confirm with

the key .

✱ With the keys or , input the final temperature and confirm with the

key .

The transmitter automatically determines the temperature data points. The LC
display now shows

- at the top (1) the next temperature to be reached (flashing)

- below that (2), the current sensor temperature (static)

✱ Heat the measurement medium till the flashing temperature is exceeded or

undershot.

The starting temperature must be below the reference temperature
(25.0°C).

The final temperature must be at least 20°C above the starting
temperature.

PGM

PGM

(1)

(2)

11 Calibration

64

The next temperature to be reached is displayed flashing.

✱ Heat the measurement medium till the flashing temperature is exceeded.
✱ Repeat the procedure till all 6 temperature coefficients are determined by

the JUMO CTI-750.

The LC-display now shows the determined temperature coefficients in %/K.
✱ Accept the temperature coefficients determined -> press the key for

longer than 3 seconds, or
discard the values -> press the key .

The transmitter is in the "Calibration menu".
✱ Press key ;

The transmitter is in "Measurement mode" and displays the compensated
conductivity of the reference solution.

During the calibration, the temperature changing speed of the
measurement solution of
10 K/min in the case of JUMO CTI-750 with a free-standing tem­perature sensor or
1 K/min in the case of JUMO CTI-750 with an integrated tempera­ture sensor
must not be exceeded.

As soon as one of the target temperatures is reached, its display
becomes static (not flashing).

PGM

EXIT

EXIT

65

12 Maintenance

12.1 Conductivity-clean sensor

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

brush).

Do not use any solvents.
Stubborn sediments or deposits can be dissolved with dilute

hydrochloric acid and removed.

Comply with the safety specifications.

66

13 Rectifying errors and faults

Error
possibilities

t

13.1 Device checking

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

ment value variations from unknown causes should occur nonetheless, the
transmitter can be checked as follows.

Problem Possible cause Measure

No display of measured
value
or
signal output

Voltage supply absent Check voltage supply,

check terminals

Measured value display
000 or
signal output 0%
(e.g. 4 mA)

Sensor not submerged in
medium;
Tank level too low

Fill up tank

Flow meter
blocked

Clean the flow meter

Sensor faulty see "Device checking",

page 66

Measured value display
8888 flashing +
device status ALARM
flashing.

The temperature display
is OK
or
LED 1 + LED 2

flashing

Out of range => the mea­surement/ display range
was exceeded or under­shot

select suitable measure­ment range or check the
concentration table

Measured value display
8888 flashing +
device status ALARM
flashing.

The temperature display
is 8888 flashing
or
LED 1 + LED 2

flashing

The temperature sensor
is faulty

The transmitter or the
conductivity sensor must
be replaced.

or
set measured value ac-

quisition "Inflow temper­ature" briefly to manual,
see "INFLOW TEMPER­ATURE" , page 45.

wrong or varying
measured value display

Sensor not submerged
deep enough

Fill the tank

no blending taking place ensure good blending

near the sensor, ensure
clearance of
about 5 mm for
circulation

Air bubbles Check installation loca-

tion,
see "General", page 21.

67

13 Rectifying errors and faults

13.1.1 Checking with resistance loop

Position of the
resistance loop

✱ Lead a wire through the measurement cell (see Figure)
✱ Connect the resistance R to the wire

Calculation of
the
resistance

Formula for calculation of the resistance of the resistance loop:

Remark: 1 mS/cm = 1·10

-3

S/cm

1 µS/cm = 1·10

-6

S/cm

In case of display values up to 20 mS, the resistance loop must have 1 turn.
In case of display values from 50 mS onwards, the resistance loop must have
3 turns.

When calibrating the sensitive part of the measurement cell, do not
place on or touch any surface, else the measured value will get fal­sified.

R =

N

2

· K

R = Resistance of the resistance loop

Lf N = Number of turns in the loop

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

The cell constant of the JUMO CTI-750 depends on the structural
shape.!

The Tee measuring cell has a cell constant of 6.80 1/cm.
The VARIVENT

®

-measuring celll has a cell constant of 6.50 1/cm.

13 Rectifying errors and faults

68

Example 1 The JUMO CTI-750 with Tee-shaped measuring cell should display 20 mS:

To get a display of 20 mS/cm, the resistance loop (with 1 turn) must have a re­sistance of 340 Ohm.

Example 2 The JUMO CTI-750 with Tee-shaped measuring cell should display 500 mS:

To get a display of 500 mS/cm, the resistance loop (with 3 turns) must have a
resistance of 122.4 Ohm.

R =

1

2

·6.80 1/cm
= 340

Ω

20·10-3 S/cm

R =

3

2

·6.80 1/cm
= 122.4

Ω

500·10-3 S/cm

69

13 Rectifying errors and faults

Pre-calculated
values

The display value 0 is obtained when the sensor is dry and without conducting
coats, as well as when there is no resistance loop.

Structural shape/ Cell constant

Material: PEEK
K = 6.80 1/cm

Material: PEEK

K = 6.50 1/cm

Display in case of

measurement

range end

Number of

turns

Cell constant

[1/cm]

Required resis-

tance

[Ω]

500 µS/cm 1 6,80 13600,00

1 6,50 13000,00

1000 µS/cm 1 6,80 6800,00

1 6,50 6500,00

2000 µS/cm 1 6,80 3400,00

1 6,50 3250,00

5000 µS/cm 1 6,80 1360,00

1 6,50 1300,00

10 mS/cm 1 6,80 680,00

1 6,50 650,00

20 mS/cm 1 6,80 340,00

1 6,50 325,00

50 mS/cm 3 6,80 1224,00

3 6,50 1170,00

100 mS/cm 3 6,80 612,00

3 6,50 585,00

200 mS/cm 3 6,80 306,00

3 6,50 292,50

500 mS/cm 3 6,80 122,40

3 6,50 117,00

1000 mS/cm 3 6,80 61,20

3 6,50 58,50

2000 mS/cm 3 6,80 30,60

3 6,50 29,25

Material: PVDF
K = 5.45 1/cm

13 Rectifying errors and faults

70

Carry out test ✱ Determine test resistance.

✱ Connect the JUMO CTI-750 electrically, see chapter 7 "Installation", page

30.

✱ Select the corresponding measurement range, see chapter 10.5.1 "INPUT

CONDUCTIVITY (Input conductivity)", page 42 -> MEASUREMENT RANGE

1...4

✱ Set TC to 0%/K, see chapter 10.5.1 "INPUT CONDUCTIVITY (Input con-

ductivity)", page 42 -> TEMP.COEFFICIENT.

✱ Put the resistance loop in place in accordance with the figure.

13.1.2 Testing with reference fluid

Put in test solu­tion

Carry out test ✱ Prepare the conductivity test solution in a sufficiently large container

✱ Connect the device electrically, see chapter 7 "Installation", page 30.
✱ Select the measurement range according to the conductivity test solution,

see chapter 10.5.1 "INPUT CONDUCTIVITY (Input conductivity)", page 42 ­> MEASUREMENT RANGE 1...4

✱ Set TC to 0%/K, see chapter 10.5.1 "INPUT CONDUCTIVITY (Input con-

ductivity)", page 42 -> TEMP.COEFFICIENT.

✱ Submerge the measurement cell in the container and do not move any

more during the measurement.

71

13 Rectifying errors and faults

13.1.3 Testing with reference measuring instrument

Put in test solu­tion

Carry out test ✱ Prepare the conductivity test solution in a sufficiently large container

✱ Connect the JUMO CTI-750 electrically, see chapter 7 "Installation", page

30.

✱ Select the measurement range according to the conductivity test solution,

see chapter 10.5.1 "INPUT CONDUCTIVITY (Input conductivity)", page 42 ­> MEASUREMENT RANGE 1...4

✱ Set TC to 0%/K, see chapter 10.5.1 "INPUT CONDUCTIVITY (Input con-

ductivity)", page 42 -> TEMP.COEFFICIENT.

✱ Set the TC of the reference instrument also to 0%/K (see operating manual

of the reference instrument). If that is not possible, the liquid sample must
be tempered to the reference temperature of the reference instrument.

✱ Submerge the measuring cell to be tested and the measuring cell of the ref-

erence instrument in the tank and do not move them any more at all during
measurement.

✱ The output and the display of the instrument to be tested or the display of

the display device connected to it and that of the reference device con­nected to it must match after taking the permissible instrument errors into
account.

72

14 Annex

14.1 Before configuring

If many parameters of the device are to be re-configured, it is advisable to
make a note of all the parameters to be changed in the following table, and to
process the parameters in the given sequence.

The following list shows the maximum number of modifiable
parameters.

Depending on the configuration, some of the parameters are not
modifiable (editable) in this device.

Parameter Selection / Range of values

Factory setting

New setting see page

Input, conductivity

Measurement range 1...4 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)

42

Temperature compensa­tion

linear

non-linear
natural water

42

Temperature coefficient

1...4

0...2.20...5.5%/K 42

Reference temperature 15.0...25.0...30°C 42
Cell constant 2.00...6.80...10.00 1/cm 42
Relative cell constant 80.0...100.0...120.0% 42
Mounting factor 80,0...100.0...120,0% 43
Concentration measure-

ment

no function

NaOH
HNO

3

customer-specific

43

Offset -200...0...+200 mS/cm 43
Filtering time 00:00:01...00:00:25 H:M:S 43
Calibration interval 0...999 days 43

Output, conductivity

73

14 Annex

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

44

Scaling, beginning 0...90% = 4 mA (e.g.)

from the measurement range scope

44

Scaling: End 100...10% = 20 mA (e.g.)

from measurement range scope

44

In case of an alarm low

high
safety value

44

At the time of calibration accompanying

frozen
safety value

44

Safety value 0.0...4.0...22.0 mA 44
Manual operation off

on

44

Manual value 0.0...4.0...22.0 mA 44

Inflow temperature

Unit °C

°F

45

Measurement value acqui­sition

Sensor

manual

45

Manual specification -20.0...25...150°C 45
Offset -15.0...0.0...+15°C 45
Filtering time 00:00:00...00:00:01...00:00:25 H:M:S 45

Outflow temperature

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

45

Scaling, beginning -20...0.0...183°C = 4 mA

(0...90% of measurement range
scope)

45

Parameter Selection / Range of values

Factory setting

New setting see page

14 Annex

74

Scaling: End -3...150...200°C = 20 mA

(100...10% of measurement range
scope)

45

In case of an alarm low

high
safety value

44

At the time of calibration accompanying

frozen
safety value

44

Safety value 0.0...4.0...22.0 mA 46
Manual operation off

on

44

Manual value 0.0...4.0...22.0 mA 44

Output binary 1 or binary 2

Function no function

Conductivity min.-contact
Conductivity Max.-contact
Conductivity LK1
Conductivity LK2
Conductivity Min.-contact
Conductivity Max.-contact
Conductivity LK1
Conductivity LK2
Calibration timer
Alarm

46

Limit value 0.0...9999.0 47
Hysteresis 0.0...1.0...999.0 47
Distance 0.0...999.0 47
Manual operation off

on

47

in case of Hold inactive

active
frozen

47

in case of alarm / calibra­tion

inactive

active
frozen

47

Switch-on delay 00:00:00...01:00:00 H:M:S 48
Switch-off delay 00:00:00...01:00:00 H:M:S 48
Pulse duration 00:00:00...01:00:00 H:M:S 48

Input binary

Parameter Selection / Range of values

Factory setting

New setting see page

75

14 Annex

Function no function

Keyboard locking/ Hold
Measurement range / Temperature
coefficient
desalination function

48

Desalination function

Reduction 0...10...50% 48
Dosing time 00:00:00...00:01:00...18:00:00 H:M:S 48
Locking time 00:00:00...00:01:00...18:00:00 H:M:S 48

Device data

Language German

English
French
Spanish
Polish
Swedish
Italian
Portuguese
Dutch
Russian

49

Contrast 0...6...11 49
Lighting off

on

at the time of operation

49

Inverse LCD off

on

49

Parameter Selection / Range of values

Factory setting

New setting see page

JUMO GmbH & Co. KG

Street address:
Moltkestraße 13 - 31
36039 Fulda, Germany
Delivery address:
Mackenrodtstraße 14
36039 Fulda, Germany
Postal address:
36035 Fulda, Germany
Phone: [phone]
Fax: [phone]
e-mail: [e-mail]
Internet: www.jumo.net

JUMO Instrument Co. Ltd.

JUMO House
Temple Bank, Riverway
Harlow, Essex CM20 2TT, UK
Phone: [phone]
Fax: [phone]
e-mail: [e-mail]
Internet: www.jumo.co.uk

JUMO Process Control, Inc.

8 Technology Boulevard
Canastota, NY 13032, USA
Phone: 315-697-JUMO

1-800-554-JUMO
Fax: [phone]
e-mail:

[e-mail]
Internet: www.jumo.us