KROHNE OPTISENS CAC 050 R User manual

Installation and
Operating Instructions
OPTISENS
CAC 050
IAC 050
Measuring and control device
for conductivity measurements
07
/200
8

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Content
0. Introduction......................................................................................................................................................................................... 3
0.1 General .................................................................................................................................................................................................................. 3
0.2 Legal matters ......................................................................................................................................................................................................... 3
0.3 Safety..................................................................................................................................................................................................................... 4
0.3.1 Documentation symbols......................................................................................................................................................................................... 4
0.4 Features.................................................................................................................................................................................................................
0.4.1 Device ....................................................................................................................................................................................................................
0.4.2 Controller................................................................................................................................................................................................................
0.4.3 Connections ...........................................................................................................................................................................................................
1. Mechanical installation ...................................................................................................................................................................... 6
1.1 Installation of panel-mounting converters .............................................................................................................................................................. 6
1.2 Installation of wall-mounting converters................................................................................................................................................................. 7
2. Electrical connection.......................................................................................................................................................................... 8
2.1 Connection diagram panel-mounting converter..................................................................................................................................................... 9
2.2 Connection diagram wall-mounting enclosure..................................................................................................................................................... 10
3. Operation of the device.................................................................................................................................................................... 11
3.1 How to adjust parameters.................................................................................................................................................................................... 11
3.1.1 Selection between alternatives ............................................................................................................................................................................ 11
3.1.2 Adjustment of numerical parameters ................................................................................................................................................................... 12
3.2 Menu Overview .................................................................................................................................................................................................... 12
3.2.1 Main menu and basic settings ............................................................................................................................................................................. 12
3.3 Password and language ...................................................................................................................................................................................... 13
3.3.1 Enter password .................................................................................................................................................................................................... 13
3.3.2 Language ............................................................................................................................................................................................................. 13
4. Adjustments for the measurement ................................................................................................................................................. 14
4.1 Configuration of the converter.............................................................................................................................................................................. 14
4.2 c value (cell factor)............................................................................................................................................................................................... 1
4.2.1 Calibration via cell factor...................................................................................................................................................................................... 1
4.3 Cable compensation and averaging .................................................................................................................................................................... 16
4.3.1 Cable compensation (zero point correction) ........................................................................................................................................................ 16
4.3.2 Averaging............................................................................................................................................................................................................. 16
4.4 Temperature compensation................................................................................................................................................................................. 16
4.4.1 Calibration of the temperature measurement ...................................................................................................................................................... 17
4.4.2 Temperature coefficient ....................................................................................................................................................................................... 17
5. Adjustments of the controller.......................................................................................................................................................... 17
.1 ON/OFF controller................................................................................................................................................................................................ 18
.2 P / PI controller as impulse-frequency controller ................................................................................................................................................. 18
.3 P / PI controller as pulse-pause controller ........................................................................................................................................................... 19
.4 Activation and deactivation of the controller ........................................................................................................................................................ 20
. Turn-on delay....................................................................................................................................................................................................... 20
.6 External controller stop ........................................................................................................................................................................................ 20
.7 Manual operation of the relays............................................................................................................................................................................. 21
.8 Limit values .......................................................................................................................................................................................................... 22
.8.1 Turn-on delay....................................................................................................................................................................................................... 22
.9 Dosage check ...................................................................................................................................................................................................... 22
6. Alarm.................................................................................................................................................................................................. 23
6.1 Error messages.................................................................................................................................................................................................... 24
7. Output................................................................................................................................................................................................ 24
7.1 Current output ...................................................................................................................................................................................................... 2
7.2 Serial interface RS48 (option)............................................................................................................................................................................ 2
8. Operation and maintenance ............................................................................................................................................................ 25
8.1 Maintenance of the device................................................................................................................................................................................... 2
8.2 Display contrast ................................................................................................................................................................................................... 2
8.3 Exchange fuse ..................................................................................................................................................................................................... 2
8.4 Cleaning............................................................................................................................................................................................................... 2
8. Maintenance of the conductivity measurement ................................................................................................................................................... 26
8.6 Disposal ............................................................................................................................................................................................................... 26
8.7 Service ................................................................................................................................................................................................................. 26
8.7.1 Product info.......................................................................................................................................................................................................... 26
8.7.2 Analog inputs ....................................................................................................................................................................................................... 26

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8.7.3 Erase settings (reset)........................................................................................................................................................................................... 26
9. Technical data................................................................................................................................................................................... 27
9.1 Technical data...................................................................................................................................................................................................... 27
9.2 Dimensions .......................................................................................................................................................................................................... 28
9.2.1 Panel-mounting enclosure ................................................................................................................................................................................... 28
9.2.2 Wall-mounting enclosure ..................................................................................................................................................................................... 28
10. Device return form............................................................................................................................................................................ 29
11. Customer settings - for reference................................................................................................................................................... 30
0. Introduction
0.1 General
This manual applies to the following devices:
Device and type revision date
CAC 0 0 R 09/07
CAC 0 0 W 09/07
IAC 0 0 R 09/07
IAC 0 0 W 09/07
It contains technical information for the installation, start-up and maintenance. If you have any questions not
included in this manual please contact your supplier or the official representative of KROHNE Water Solutions
in your country.
0.2 Legal matters
Authorized personnel
Installation, connection, adjustment, start-up, and maintenance of the device are carried out by authorized
personnel with adequate qualification.
Liability
Responsibility as to suitability and intended use of these devices rests solely with the user. Improper
installation and operation may lead to loss of warranty. In addition, KROHNE Group's Standard General
Conditions of Sale and Delivery, found on the back of the invoice and forming the basis of the purchasing
contract, are applicable.
General limitation on liability
Unless otherwise expressly set forth in the Standard Terms and Conditions of Sale and Delivery, the Seller is
only liable for damages, whatever their legal basis is, in case they are based on willful action or gross
negligence. This limitation on liability does not apply in the event the Buyer raises claims relating to personal
injury or damages to property according to the product liability law based on a defect of the delivered goods.
Any advice given by the Seller, in particular regarding the application of the delivered goods, shall only commit
the Seller if given or confirmed in writing.
Returning the device
If you need to return the level gauge to the manufacturer or supplier, please read to the instructions and
complete the form given in the appendix.
Warranty
Please consult KROHNE Water Solutions General Terms and Conditions for information on guarantee and
liability.

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0.3 Safety
Please check for damages immediately after receiving the devices and report any damages within 24 hours to
the delivering company. Never work with a damaged device.
Keep this manual at a safe place where you can always look up the safety instructions and the information on
handling and usage.
This device was designed and built according to the safety measurements for electronic devices and has left
our company in perfect working condition. To preserve this condition and to ensure safe usage follow all
instructions carefully and pay special attention to all warnings issued in this manual. If the device is visibly
damaged or has been stored inappropriately or if there are any doubts concerning safe usage, shut it down
and make sure it cannot be restarted by accident.
0.3.1 Documentation symbols
A set of symbols is used to give warnings or information relevant to particular applications. These are defined
below:
Caution Attention
Information that, if not followed, may lead to actions resulting in incorrect functioning of the device.
Warning
Information that, if not followed, may lead to actions resulting in measurement error, personal injury and/or
damage to the device.
NOTE Is used to highlight interesting details.

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0.4 Features
0.4.1 Device
Cell factor (recommendation)
0.00…20.00 MΩ/cm c = 0.0 /cm
0.000…2.000 µS/cm c = 0.0 /cm
0.00…20.00 µS/cm c = 0.0 /cm
0.0…200.0 µS/cm c = 0.0 /cm
0.000…2.000 mS/cm c = 0.2/cm
0.00…20.00 mS/cm c = 1/cm
Measuring ranges
conductive
0.0…200.0 mS/cm c = 10/cm
0.00…2.00 mS/cm c see measuring cell
0.,0…200.0 mS/cm c see measuring cell
Measuring ranges
inductive
0…2000 mS/cm c see measuring cell
Measuring range temperature -30.0…+140.0°C
Display Measured value with dimension
Temperature with dimension
Status display sensor, controller & alarm
Temperature compensation manually or automatically with Pt100 or NTC
0.4.2 Controller
Set points 2 set points with adjustable direction
Controller types ON/OFF controller with hysteresis
P controller as Pulse-Pause-, Impulse-Frequency- or steady controller
PI controller as Pulse-Pause-, Impulse-Frequency- or steady controller
Hysteresis adjustable within the measuring range
P range X
P
adjustable within the measuring range
Integral time T
N
0…2000 s
Least pulse 0.1…9.9 s
Pulse+ pause time 02…99 s
Impulse frequency 00…72 equiv. to 0...7200 pulses/h
Turn-on delay 0…200 s
Alarm function min. and max. limit and onset delay, power failure alarm,
Dosage control 0…2000 s
0.4.3 Connections
Relays 3 potential-free contacts (2x controller, 1x alarm)
6 A, 2 0 V, max. 0 VA
Analog outputs 2x 0/4…20 mA galvanically isolated
max. loading 00 Ohm
Analog inputs 1 measuring input for conductivity sensor
1 measuring input for Pt100 or NTC
Digital input external controller stop or lack-of-water indication
Serial interface (Option) RS48 , Baud rate 9600, data format 8 Bit,
1start and 1stop bit, no parity

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1. Mechanical installation
On Chapter 9.2 you will find detailed instructions for the installation.
For panel-type meters you have to prepare an opening of 92 x 92 mm / 3.6” x 3.6”. Install the device and fix it
with the two mounting clips which were part of the delivery.
You can install devices in wall-mounting enclosures either by hanging them upon the center slot or by sliding
the slot under a screw, which is an alternative for limited space. Either way you have to fix it additionally with
two screws.
ATTENTION
Install the device in a place where it is not put under mechanical or chemical strain!
Mind the protection class:
•Panel mounting version: IP 4 (front), IP 30 (Housing)
•Wall mounting version: IP 6 (closed terminal cover)
1.1 Installation of panel-mounting converters
Prepare an opening of 92 x 92 mm / 3.6” x 3.6”.
Install the device from the front side and fix it with the
two mounting clips which were part of the delivery.
Screw tight until the device is fixed perfectly.

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1.2 Installation of wall-mounting converters
Unscrew the terminal cover.
Drill three holes (max. M ) according to the drawing.
Mind that there are two ways for installation:
(1) You can hang the device upon the upper screw.
In that case drill the upper hole 120mm / 4.7” above
the lower two.
(2) Or you can slip the fixture on the back of the
device under the upper screw. In that case the upper
hole has to be another 1 mm / 0.6” higher.
Insert the upper screw and make sure to leave at
least 3 mm between wall and screw head for the
fixture.
Mount the device and fix it with the two lower
screws. Close the terminal cover or start with the
connections.

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2. Electrical connection
You will find a detailed connection diagram on the following pages.
Before connecting the power supply check the information on the nameplate of the device!
ATTENTION
Input, output and control lines must be installed separate from each other and separate from power lines!
For inputs and outputs use screened lines and connect the screen on one side only.
The conductivity measurement is interference-sensitive. Use a special screened cable and over long
distances or in humid atmosphere additionally an impedance converter.
For the connection of the temperature sensor use a low-resistance cable with a large diameter.
When using the relays, mind that with inductive loads, interference must be suppressed. If that is not
possible, the relay must be protected at the terminal block in the converter by a resistance-capacitance filter
or, in case of direct current, by a free- wheeling diode.
Current up to Capacitor C Resistance R
60 mA 10 nF 260 V 390 Ohm 2 Watt
70 mA 47 nF 260 V 22 Ohm 2 Watt
1 0 mA 100 nF 260 V 47 Ohm 2 Watt
1.0 A 220 nF 260 V 47 Ohm 2 Watt

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2.1 Connection diagram panel-mounting converter
Connection Termin
als
Notes
2 = Inner electrode = white
3 = Outer electrode = brown
Conductivity sensor
conductive (CAC)
2 + 3
+ 6 Integrated Pt 100 = yellow & green
Conductivity sensor
inductive (IAC)
1 – 4
+ 6
Measurement = cable #3
1 = screen, 2 = core cable #3
Voltage supply = cable #1
3 = screen, 4 = core cable #1
Integrated NTC = cable #2
= screen, 6 = core cable #2
Pt 100 (CAC) / NTC (IAC) + 6
Analog output 11 + 12 9 = + , 10 = - , max. burden 00 Ohm
Relay 1 18 + 19
Relay 2 20 + 21
Relay 3 22 + 23 Alarm relay
Power supply 24 – 26 check information given on name plate
RS48 (option) Sub-D 3 = +, 8 = -
4/7 bridged activates terminating resistance
NOTE
When using different sensors or cables refer to the instructions for connection and cable color specifications
given there.

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2.2 Connection diagram wall-mounting enclosure
Connection Termin
als
Notes
1 = Inner electrode = white
2 = Outer electrode = brown
Conductivity sensor
conductive (CAC)
1 – 2
4 + Integrated Pt 100 = green & yellow
Conductivity sensor
inductive (IAC)
1 - 4 Measurement = cable #3
1 = core, 2 = screen cable #3
Voltage supply = cable #1
Integrated NTC = cable #2
4 = screen, = core cable #2
PT 100 (CAC) / NTC (IAC) 4 +
Display contrast Display Potentiometer to adjust brightness
Analog output 11 + 12 11 = + , 12 = - , max. load 00 ohm
Relay 1 14 + 1
Relay 2 16 + 17
Relay 3 18 + 19 Alarm Relais
Power supply 20 - 22 Check information given on name plate
RS 48 (option) 23 + 24 23 = + , 24 = - , Jumper A activates terminating resistance
Digital input 26 + 27 26 = + , 27 = - , external controller stop and / or low water indication
NOTE
When using different sensors or cables refer to the instructions for connection and cable color specifications
given there.