KROHNE OPTISENS AAC 050 Series User manual

Installation and
Operating Instructions
OPTISENS
AAC 050
Measuring and control instruments
for potentiostatic measurements
of Chlorine, total Chlorine, Chlorine dioxide,
Oxygen, Ozone and Hydrogen peroxide
07/2008

Manual OPTISE S AAC 050
OPTISE S AAC 050 2
Content
0. Introduction......................................................................................................................................................................................... 4
0.1 General .................................................................................................................................................................................................................. 4
0.2 Legal matters ......................................................................................................................................................................................................... 4
0.3 Safety..................................................................................................................................................................................................................... 5
0.3.1 Documentation symbols......................................................................................................................................................................................... 5
0.4 eatures................................................................................................................................................................................................................. 6
0.4.1 Device .................................................................................................................................................................................................................... 6
0.4.2 Controller................................................................................................................................................................................................................ 6
0.4.3 Connections ........................................................................................................................................................................................................... 6
1. Mechanical installation ...................................................................................................................................................................... 7
1.1 Installation of panel-mounting converters .............................................................................................................................................................. 7
1.2 Installation of wall-mounting converters................................................................................................................................................................. 8
2. Electrical connection.......................................................................................................................................................................... 9
2.1 Connection diagram panel-mounting converter................................................................................................................................................... 10
2.2 Connection diagram wall-mounting enclosure..................................................................................................................................................... 11
3. Operation of the device.................................................................................................................................................................... 12
3.1 How to adjust parameters.................................................................................................................................................................................... 12
3.1.1 Selection between alternatives ............................................................................................................................................................................ 12
3.1.2 Adjustment of numerical parameters ................................................................................................................................................................... 13
3.2 Menu Overview .................................................................................................................................................................................................... 13
3.2.1 Main menu and basic settings ............................................................................................................................................................................. 13
3.3 Password and language ...................................................................................................................................................................................... 14
3.3.1 Enter password .................................................................................................................................................................................................... 14
3.3.2 Language ............................................................................................................................................................................................................. 14
4. Adjustments for the measurement ................................................................................................................................................. 14
4.1 Configuration of the converter.............................................................................................................................................................................. 15
4.2 Calibration............................................................................................................................................................................................................ 15
4.3 Temperature compensation................................................................................................................................................................................. 16
4.3.1 Calibration of the temperature measurement ...................................................................................................................................................... 16
4.4 Automatic Sensor Cleaning ASR (option)............................................................................................................................................................ 17
5. Adjustments of the controller.......................................................................................................................................................... 17
5.1 ON/O controller................................................................................................................................................................................................ 18
5.2 P / PI controller as impulse-frequency controller ................................................................................................................................................. 19
5.3 P / PI controller as pulse-pause controller ........................................................................................................................................................... 20
5.4 Activation and deactivation of the controller ........................................................................................................................................................ 21
5.5 Turn-on delay....................................................................................................................................................................................................... 21
5.6 External controller stop ........................................................................................................................................................................................ 21
5.7 Manual operation of the relays............................................................................................................................................................................. 22
5.8 Limit values .......................................................................................................................................................................................................... 23
5.8.1 Turn-on delay....................................................................................................................................................................................................... 23
5.9 Dosage check ...................................................................................................................................................................................................... 23
6. Alarm.................................................................................................................................................................................................. 24
6.1 Error messages.................................................................................................................................................................................................... 25
7. Output................................................................................................................................................................................................ 26
7.1 Current output ...................................................................................................................................................................................................... 26
7.2 Serial interface RS485 (option)............................................................................................................................................................................ 26
8. Operation and maintenance ............................................................................................................................................................ 27
8.1 Maintenance of the device................................................................................................................................................................................... 27
8.2 Display contrast ................................................................................................................................................................................................... 27
8.3 Exchange fuse ..................................................................................................................................................................................................... 27
8.4 Cleaning............................................................................................................................................................................................................... 27
8.5 Maintenance of the potentiostatic measurement ................................................................................................................................................. 27
8.6 Disposal ............................................................................................................................................................................................................... 27
8.7 Service ................................................................................................................................................................................................................. 28
8.7.1 Product info.......................................................................................................................................................................................................... 28
8.7.2 Analog inputs ....................................................................................................................................................................................................... 28
8.7.3 Erase settings (reset)........................................................................................................................................................................................... 28
9. Technical data................................................................................................................................................................................... 29
9.1 Technical data...................................................................................................................................................................................................... 29
9.2 Dimensions .......................................................................................................................................................................................................... 30

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9.2.1 Panel-mounting enclosure ................................................................................................................................................................................... 30
9.2.2 Wall-mounting enclosure ..................................................................................................................................................................................... 30
10. Device return form............................................................................................................................................................................ 31
11. Customer settings - for reference................................................................................................................................................... 32

Manual OPTISE S AAC 050
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0. Introduction
0.1 General
This manual applies to the following devices:
Device and type revision date
AAC 050 R 05 / 08
AAC 050 W 05 / 08
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
0.00…4.00 mg/l Cl2 free Chlorine
0.00…20.00 mg/l Cl2 free Chlorine
0.00…4.00 mg/l O3 Ozone
0.00…4.00 mg/l TCl2 total Chlorine
0.00…4.00 mg/l ClO2 Chlorine dioxide
0.00…20.00 mg/l O2 Oxygen
0.000…9.999 mg/l O2 Oxygen
Measuring ranges
0.0…100.0 mg/l H2O2 Hydrogen peroxide
Temperature range -30.0…+140.0°C
low 5.0…30.0 l/h
Display measured value with unit;
temperature with unit;
status display sensor, calibration, controller & alarm
Temperature compensation manual or automatic with Pt100 or NTC
Calibration 1-point calibration; calibration in air for Oxygen
Cleaning (option) Automatical recognition if connected
0.4.2 Controller
Set points 2 set points with adjustable direction
Controller types ON/O controller with hysteresis
P controller as Pulse-Pause-, Impulse- requency- or steady controller
PI controller as Pulse-Pause-, Impulse- requency- 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… 90 min
0.4.3 Connections
Relays 3 potential-free contacts (2x controller, 1x alarm)
6 A, 250 V, max. 550 VA
Analog output 1x 0/4…20 mA galvanically isolated
max. loading 500 Ohm
Analog inputs 1 measuring input for Cl2, TCl2, ClO2, O2, O3 or H2O2,
1 measuring input for Pt100 or NTC
Digital input external controller stop or lack-of-water indication
Serial interface (Option) RS485, 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.
or 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 54 (front), IP 30 (Housing)
•Wall mounting version: IP 65 (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. M5) 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 15mm / 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!
or inputs and outputs use screened lines and connect the screen on one side only.
The potentiostatic measurement is interference-sensitive, especially when using membrane sensors. Use a
special screened cable. Membrane sensors are delivered complete with cable.
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 n 260 V 390 Ohm 2 Watt
70 mA 47 n 260 V 22 Ohm 2 Watt
150 mA 100 n 260 V 47 Ohm 2 Watt
1.0 A 220 n 260 V 47 Ohm 2 Watt

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2.1 Connection diagram panel-mounting converter
Connection Terminals otes
1 = screen
2 = measuring electrode
1- 4
3 = reference electrode
Metal electrodes &
membrane sensors
without electronics
4 = counter electrode
With 2-electrode sensors bridge 3 + 4
1 + 2 = measurement
3 = - 6V
Membrane Sensor with
electronics
1 - 4
4 = + 6V
Pt100/NTC 5 + 6
Analog output 9 + 10 9 = +, 10 = - , max. burden 500 Ohm
Digital input 11 + 12 11 = +, 12 = - , external controller stop or lack-of-water sensor or
flow-meter
low measurement: 11 = white, 12 = brown
Relay 1 18 + 19
Relay 2 20 + 21
Relay 3 22 + 23 Alarm Relay
Power supply 24+25+26 check information given on nameplate
RS485 (option) Sub-D
Sub-D 4/7
3 = +, 8 = -
bridged = terminating impedance activated