JUMO CTI-500 User 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 difficul-
ties should arise during start-up, please do not carry out any unauthorized mani-
pulations. 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 reada-
ble, 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

5
1 Typographical conventions
1.1 Warning signs
1.2 Note 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!
Note
This symbol is used when your special attention is drawn to a remark.
abc1Footnote
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.
✱Action instruction
This symbol indicates that an action to be performed is described.
The individual steps are marked by this asterisk.
Example:
✱Remove crosspoint screws.

6
2 General
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
(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)

7
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 user-
friendly 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

3 Inductive conductivity measurement
8
3.2 Function
of the
transmitter 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.
of the
measuring cell 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
(2)
(1)
(3)
(4)
(1a)

9
4 Identifying the device version
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:
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.
Description Description on the
nameplate Example
Device type Typ 202755/15-168-0-82/000
Fabrication number F-Nr 0220465201018240001
Voltage supply - DC 19 ... 31 V
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!

4 Identifying the device version
10
4.2 Order details
4.2.1 Head-mounted transmitter
1The PC setup program is required for programming the device.
2Special tee is not included in delivery.
3If required, order extra code /580
4Indicate the type code extension in succession separated by a comma.
5Only in case of process connection 168 and 169 in combination with type code extension 268.
6Maximum medium temperature 60°C.
7Assembly material (holding clamp) not part of the supplied kit. If required, please order
additionally.
8Not possible in conjunction with extra code 768 and/or 844.
(1) Basic types
202755/10 JUMO CTI-500 Head transmitter without display/keyboard, consisting of
transmitter with permanently mounted sensor1
202755/15 JUMO CTI-500 Head transmitter with display/keyboard
(2) Process connection
168 PVC union nut G 1 ½ A2,6
169 Stainless steel union nut G 1 ½ A2
607 Taper socket with union nut DN 50 DIN 11851 (dairy compression fitting)
617 Clamping socket (clamp) 2 ½" similar to DIN 326767
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) 3
84 two M16 cable glands and one blanking plug
(5) Extra codes 4
000 no extra code
062 with DNV GL approval8
268 internal temperature sensor
580 1 set M12 plug/socket connectors
768 Measurement cell material PVDF 5
844 Voltage supply AC 24 V
(1) (2) (3) (4) (5) (5)
Order code / - - / , ...
Order example 202755/10 / 168 - 0 - 82 / 000 ,

11
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)1
202755/25 JUMO CTI-500 transmitter with display/keyboard (without sensor) 7
202755/60 JUMO CTI-500 transmitter without display/keyboard with sensor
(cable length: 10 m)
1
202755/65 JUMO CTI-500 transmitter with display/keyboard with sensor
(cable length: 10 m)
202755/80 JUMO CTI-500 replacement sensor with 10 m cable without transmitter,
including calibration set 3,7
(3) Process connection
000 not available
168 PVC union nut G 1 ½ A 2, 8
169 Stainless steel union nut G 1 ½ A2
607 Taper socket with union nut DN 50 DIN 11851 (dairy compression fitting)
617 Clamping socket (clamp) 2 ½" similar to DIN 32676 3
690 SMS DN 2"
706 immersion version
(4) Immersion length
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)
(5) Electrical connection
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 4
84 two M16 cable glands and one blanking plug
(6) Extra codes 5
000 no extra code
268 internal temperature sensor
580 1 set M12 plug/socket connectors
768 Measurement cell material PVDF 6
844 Voltage supply AC 24 V
(1) (2) (3) (4) (5) (5)
Order code / - - / , ...
Order example 202755/65 / 706 - 1000 - 82 / 000 ,

4 Identifying the device version
12
1The PC setup program is required for programming the instrument.
2A tee is not included in delivery.
3Mounting items (union/ring nuts, holding clamp) are not included in delivery.
If required, please order additionally.
4If required, order extra code /580
5Show type extension codes in succession separated by a comma.
6Only in case of process extension 168 and 169 in combination with type extension code 268.
7A balancing set is urgently required for commissioning. If required, please order additionally.
8Maximum medium temperature 60 °C.

13
5 Device description
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
Rating of the
solid-state
relays
U ≤DC 45 V
U ≤AC 30 V
I≤200 mA
Electrical
connection plug-in screw terminals 2.5 mm2or M12 plug/socket connector
Display (option) graphics LCD with background lighting; adjustable contrast
dimensions: 62 x 23 mm
Permissible
ambient
temperature
(transmitter)
-5 to +50°C
max. 93% relative humidity, no condensation
Permissible
storage
temperature
(transmitter)
-20 to +75°C
max. 93% relative humidity, no condensation
Enclosure
protection
(transmitter)
IP67
Housing Polyamide
Weight depending on version and process connection
approx. 0.3 — 2 kg

5 Device description
14
5.1.2 Conductivity/ concentration transmitter
Concentration
measurement
(implemented in
the device
software)
- NaOH (caustic soda)
0 — 15 % by weight or 25 — 50 % by weight
- HNO3(nitric acid); check chemical resistance of the sensor !
0 — 25 % by weight or 36 — 82 % by weight
- customer-specific concentration curve
freely programmable through 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.
Burden ≤ 500Ωfor current output
≥ 2kΩfor 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)
Measuring
ranges Four ranges can be selected. One of these ranges can be activated via an external switch or a PLC.
1not compensated for temperature
Note:
The overall tolerance is made up of the tolerance of the transmitter + the
tolerance of the sensor.
Measurement ranges
Transmitter
Tolerance
(in % of range
span)
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

15
5 Device description
5.1.3 Temperature transmitter
Temperature
acquisition manually -20.0 — 25.0 — 150°C/°F or
automatically
Temperature
measurement
range
-20 — 150°C/°F
Characteristic linear
Tolerance ≤0.5% of range
Output signal
for 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 im Bereich -20...+200°C freely scalable.
The sensor can be used in the range -10...+100°C.
Burden ≤ 500Ωfor current output
≥ 2 kΩfor 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 15 to 30°C, adjustable
Temperature
coefficient 0.0 to 5.5 %/°C, adjustable
Compensation
range -20 to 150°C
Function - Linear compensation (constant temperature coefficient).
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.

5 Device description
16
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
Note the limiting values (ambient temperature) of the device.
Pressure 10 bar max. at 20°C
06 bar max. at 60°C
1not compensated for temperature
Process connection maximum medium temperature
168 60 °C
706
169
80 °C
short-term100 °C
607
617
690
Measurement range
Sensor Tolerance
(in % of range span)
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

17
5 Device description
5.1.6 Approvals/approval marks
Approval mark DNV GL
Testing agency DNV GL
Certificate/
certification
number
TAA00001W9
Inspection
basis DNV GL Class Guideline CG-0339
Valid for Type 202755/10
Type 202755/15

18
6 Mounting
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 The measuring transmitter can be mounted in any position.
Screwing in and
unscrewing the
detached
sensor
The cable must not be twisted!
Avoid putting tension on the cable. In particular, avoid tugging it.
Sensor details
min. 20 mm
min. 20 mm
(1)

19
6 Mounting
6.2 Head-mounted transmitter
Installation
variations

6 Mounting
20
6.3 Split version (separate sensor)
Transmitter
head
Drilling jig for
wall-mounting