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

Manual OPTISE S AAC 050
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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
OPTISE S AAC 050 4
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.

Manual OPTISE S AAC 050
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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

Manual OPTISE S AAC 050
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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

Manual OPTISE S AAC 050
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2.2 Connection diagram wall-mounting enclosure
Connection Terminals otes
1 = screen
2 = measuring electrode
3 = reference electrode
1 - 4
4 = counter electrode
Metal electrode &
membrane sensors
without electronics
With 2-electrode sensors bridge 3 + 4
1 + 2 = Measurement
3 = - 6V
Membrane sensors
with electronics
1 - 4
4 = + 6V
Pt100 / NTC 6 - 7
Display contrast Display Potentiometer to adjust the display contrast
Analog output 11 + 12 11 = +, 12 = - ; max. burden 500 Ohm
Relay 1 14 + 15
Relay 2 16 + 17
Relay 3 18 + 19 Alarm relay
Power supply 20+21+22 check information given on nameplate
RS 485 (option) 23 + 24 23 = -, 24 = +,- Jumper A bridged = terminating impedance
activated
Digital input 26 - 27 26 = +, 27 = -, external controller stop or lack of water sensor or
flow meter
low measurement:
26 = white, 27 = brown

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3. Operation of the device
1 Measured value
2 Status relay 1
3 Status relay 2
 relay O
 relay ON
4 Temperature
5 Controller
AUTO: controller ON
MAN : controller O (manual operation
of the relays)
6 Orientation aids
7 Key left ()
8 Key up ()
9 Key down ()
10 Key right ()
11 Key “Enter“
When turned on the device shows the measured values of conductivity and temperature together with the
controller mode (Man) and the status of the relays S1 and S2 (both O ).
With five membrane keys you can move within the menu:
•With key  you enter the main menu.
•With keys  and  you move up and down in the menu.
•With key  you address a menu or parameter.
•With key  you leave a menu without storing
•With key “Enter“ changes are stored.
or your convenience arrows in the display indicate the directions you can take from your position in the
menu.
3.1 How to adjust parameters
Temp. comp.
 Manual.
1) When you address a parameter the actual setting is displayed.
2) Switch to the next alternative setting with key.
Temp. comp.
 Auto
Temp. comp.
 Manual.
3) When you have come to the last alternative, pressing the key once
more will bring you back to the start.
3.1.1 Selection between alternatives
or many parameters you have the choice between two or more alternatives, for e. g. between manual and
automatic temperature compensation. or these parameters you need only key. Switch from one
alternative to the next until you either come back to where you started or until you reach the alternative you
were looking for.
With these parameters any changes are immediately valid - there is no need to store the change.

Manual OPTISE S AAC 050
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Enter password
 058 1) Address the parameter with key .
Enter password
058 
2) A double arrow appears behind the number indicating that the number
can be changed now with keys and .
Enter password
 062
3) Store the new value with key „Enter“. The double arrow disappears -
the new value is stored.
3.1.2 Adjustment of numerical parameters
Numerical parameters can only be altered when a double arrow is visible behind the number. This double
arrow appears when you address the parameter with key.
Adjust the parameter with keys  and . A short pressure on the key changes the last decimal by 1. If you
keep the key pressed, the value will continue changing until the pressure is released.
Store the changes with key „Enter“. The double arrow disappears.
3.2 Menu Overview
1.48 mg/l 25.0°C
 S1  S2 Auto
Display of the measured values
 Press key  to enter the main menu.
Main menu
Calibrate Calibration function (only for pH measurements)
Temp. comp. Temperature compensation (only for pH measurements)
Enter password Password function
Set points Controller settings - set points, P ranges, I functions
Limit values Alarm function
Basic settings
Basic settings  Cal. Pt/NTC
Service Contr. settings
Turn-on delay
Analog outputs
Language
Bus address
low alarm
All parameters which are set just once
at the beginning can be found in the
menu “basic settings“
Averaging
Temp. Coeff.
Cleaning
3.2.1 Main menu and basic settings
The parameters are sorted into two menus: In the main menu you will find all functions which are used
regularly, such as calibration. The menu basic settings contains all parameters which are set just once
during start-up.
On the following pages you will find information on how to adjust parameters and which parameters you
need for which application, in the following order:
1) General adjustments: password and language
2) Adjustments for measurement: calibration, temperature compensation, flow measurement and automatic
sensor cleaning
3) Adjustments of the controller: selection of the controller version and corresponding parameters
4) Adjustments to read out data: analog, digitally and/or as alarm

Manual OPTISE S AAC 050
OPTISE S AAC 050 14
3.3 Password and language
Main menu
.
.
Enter password  Enter password
056 Code
3.3.1 Enter password
To get access to the various parameters you have to enter the correct password:
•Code 11 gives access to the parameters „calibration“, „temperature compensation“, and „set points“.
•Code 86 gives access to all parameters and functions.
With any other number it is impossible to select, view or change any parameter.
Main menu
.
.
Basic settings
Basic settings 
.
.
Language
Language  We speak
English
3.3.2 Language
or the communication with the device you can choose from a variety of languages.
Since choosing a language is part of the basic settings, it requires code 86. If a different code is set, you will
be asked to enter the correct password.
4. Adjustments for the measurement
Main menu
Calibration Calibration of the measurement and display of slope.
Temp. comp.
.
Selection between automatic and manual temperature compensation,
adjustment of temperature for manual compensation.
low rate Display of the flow measurement
.
Basic settings
Basic settings  Cal. Pt/NTC Calibration of the temperature measurement.
.
low rate Calibration of the flow measurement
.
.
low alarm Lack-of-water indication or flow measurement
Averaging Activation of averaging function
Temp. coeff. Coefficient for linear temp. compensation
Cleaning Cleaning interval and delay time (for option
with ASR)
Potentiostatic measurements require a 1-point calibration:
Since the measurement depends upon the flow-rate and calibration solutions would not be stable anyway,
the sensor cannot be taken out of the armature for calibration, as is done with pH sensors. Instead the actual
concentration of the test water is determined by an alternative method, for example photometrically with
DPD, and this value is entered as calibration value. Calibration of the Oxygen measurement is simpler, using
the Oxygen concentration of the ambient air.
The measurement is influenced by temperature. This influence can be compensated manually or
automatically. or manual compensation the temperature is entered manually, for automatic compensation
temperature has to be measured with a temperature sensor.

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4.1 Configuration of the converter
Main menu
.
.
Basic settings
Basic settings 
.
.
Configuration
Configuration  Measurement
Temp. Sensor
The instruments AC050 POT provide two measuring inputs.
Input 1 can work with the following sensors:
Parameter Measuring range
ree Chlorine Cl2 0.00…4.00 mg/l
ree Chlorine Cl2 0.00…20.00 mg/l
Chlorine dioxide ClO2 0.00…4.00 mg/l
Ozone O3 0.00…4.00 mg/l
Total Chlorine TCl 0.00…4.00 mg/l
Oxygen O2 HAZ 0.00…20.00 mg/l
Oxygen O2 HA 0.000…9.999 mg/l
Hydrogen peroxide H2O2 0.0…100.0 mg/l
Input 2 works with the temperature sensors Pt100 or NTC.
4.2 Calibration
Main menu Calibration
DPD Calibration  DPD Calibration
0.48 mg/l
Slope
Enter the concentration determined by
photometric measurement as calibration
value.
025 mV
Calibration of the measurement of Cl2, TCl2, ClO2, O3 and H2O2
1) Switch off the controller. Take a sample of the test water flowing out of the armature and determine the
concentration by photometric DPD measurement or a similar reference method.
2) Enter the determined concentration and calibrate by pressing keys  and 

: Start with key  and then -
while still applying pressure on this key - additionally press key 

.
3) Check the displayed slope before switching on the controller.

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Main menu Calibration
Calibration  8.48 mg/l
Cal. press ↵
Slope
The Oxygen concentrations in ambient air
are stored - You do not need to enter
anything.
102%
Calibration of the Oxygen measurement
The Oxygen measurement is calibrated in water-saturated air.
1) Switch off the controller. Take the sensor out of the armature, dry the sensor tip carefully with a napkin,
hold it in the air above water with the membrane pointing down and wait until the reading is stable.
2) Calibrate by pressing key 


3) Check the displayed slope, put the sensor back in the armature, wait until the reading is stable, then
switch the controller on again.
NOTE The Oxygen measurement strongly depends on temperature. Make sure that automatic calibration is
selected during calibration.
4.3 Temperature compensation
Main menu
Automatic
compensation
Manual
compensation
.
 Temp. comp.  Temp. comp.
Temp. comp. Auto comp. Manual comp.
.
Manual Temp.
.
25.0°C
.
.
Basic settings
Calibration
Pt 100/ TC
Basic settings  Cal. Pt 100/NTC  Cal. Pt 100/NTC
.
0.0°C
.
.
Temp. coefficient
Temp. coeff. Temp. coeff.
0.0 %/K
Select between two ways of compensation:
1) Automatic compensation with temperature sensor
Mind that the temperature sensor should always measure the temperature around the conductivity sensor.
When conductivity sensor and temperature sensor are not immersed in the same solution, better switch to
manual compensation.
2) Manual compensation
If the temperature can be regarded as constant, you can enter the temperature manually instead of
measuring it continuously. The device will then compensate the temperature error of this temperature.
4.3.1 Calibration of the temperature measurement
When using a 2-wire connection for the temperature sensor, please check the temperature measurement in
the beginning. If the displayed temperature differs from the real temperature, enter the deviation as
correction in the basic settings. This correction will be added to all temperature measurements. If your
calibration was correct, the temperature displayed is now equal to the real temperature.

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4.4 Automatic Sensor Cleaning ASR (option)
Main menu
.
.
Basic settings
Basic settings 
.
.
Cleaning
Cleaning  Cleaning
1 / day
Turn-on delay
6.0 h
The patented Automatic Sensor Cleaning ASR prevents staining and passivating coatings and keeps the
surface of metal sensors clean throughout the measurement.
The cleaning is an electrochemical one: in adjustable intervals the instrument applies a strong voltage to the
electrode to produce Hydrogen and Oxygen from the surrounding water. This method needs no addition of
chemicals. Both Hydrogen and Oxygen are ORP active substances that will destroy inorganic coatings such
as rust, manganese oxide, or lime, and organic coatings such as fat or grease.
Activate the cleaning after completing the set-up to conserve the clean metal surface of the new sensor
during subsequent measurements.
The cleaning process takes about 30 seconds. During this time measurement is not possible, and after
cleaning the sensor needs some time for polarisation. Therefore the display and the analog output will show
the last measured value for five minutes, and the message „cleaning in progress“ is displayed. As a safety
measure, attempts to calibrate within these five minutes are ignored.
Activation and timing
The cleaning is activated by setting the cleaning function from 0/day (never) to 1/day (every 24h) or 2/day
(every 12 h). The first cleaning starts as soon as the function is activated, and subsequent cleanings are
carried out after 24h, or 12h, according to settings.
NOTE Often it is convenient to carry out the cleaning during the night. Therefore we have added a delay function
that enables you to set the time for the cleaning to a later hour. If, for example, you select 1 cleaning per day
at 10am and set the delay time to 12h, cleaning takes place every day at 10pm.
NOTE The device does not contain a real-time clock. Therefore all time settings have to be repeated after power
failure or disconnection of the power supply.
NOTE Whenever the instrument indicates „no water“, cleaning is not carried out.
5. Adjustments of the controller
Main menu
.
.
Set points
.
Selection of ON/O , P or PI controller, adjustment of P ranges and I
functions for 2 set points.
.
Basic settings
Basic settings 
.
.
Contr. settings
Adjustment of frequencies and pulse/pause
times, hysteresis, direction of the control
action, delay

Manual OPTISE S AAC 050
OPTISE S AAC 050 18
or any type of controller you have to enter one or two set points, and you have to tell the device whether
these set points are reached by increasing or decreasing the measured value.
You can choose between three different controller versions:
O /OFF controller
The ON/O controller switches ON if the measured value exceeds the set point and O if it drops back
below it or vice versa. Dosage is always carried out with 100% (ON) or 0% (O ). The parameter for an
ON/O controller is the hysteresis.
P controller
The P controller or proportional controller reduces the dosage in the vicinity of the set point proportional to
the control deviation. This is easily achieved if the analog output is used as steady control output. If the
relays are used, the proportional reduction is achieved by either reducing the switch frequency (Impulse-
frequency controller) or reducing the time within a given period of time in which the relay is ON (pulse-pause
controller). The parameters for a P controller are the P range and the impulse- frequency or the pulse+
pause time and the minimum pulse.
PI controller
The PI controller is a P controller with an additional I function. Adjustments and parameters are the same as
for a P controller. Additionally the integral action time has to be adjusted which determines the I function.
The I function eliminates the P controller’s disadvantage of a remaining steady-state deviation.
5.1 O /OFF controller
Main menu
.
You can choose different
.
Set points and
controller version Controller versions for
Set points  Set Point S1 S1 and S2
.
1.50 mg/l
.
P range S1
.
0.00 mg/l
Integral time S1
000 sec.
Set Point S2
0.50 mg/l Controller settings
P range S2
.
0.00 mg/l
.
Integral time S2 Direction S1
000 sec. raise
Direction S2
Basic settings lower
Basic settings 
.
 Hysteresis
Contr. settings 0.01 mg/l

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or an ON/O controller you have to set the following parameters:
1) Set points S1 and S2
Set point S1 refers to relay 1, set point S2 refers to relay 2.
2) P range and integral action time for S1 and S2
or an ON/O controller set P range = 0 and integral time = 0.
3) Acting direction for S1 and S2
Select “raise“ if the dosage raises the measured value.
Select “lower“ if the dosage lowers the measured value.
4) Optionally a hysteresis
The hysteresis prevents fast switching in the vicinity of the set point. If hysteresis is activated (by setting a
value > 0) the relay switches only when the set point is exceeded by half the hysteresis.
5.2 P / PI controller as impulse-frequency controller
Main menu
.
.
Set points and
controller version
Set points  Set point S1 You can choose different
.
1.50 mg/l Controller versions
.
P range S1 or S1 and S2
.
0.20 mg/l
Integral time S1
000 sec.
Set point S2
0.50 mg/l Controller settings
P range S2 Pulse- req. S1
0.20 mg/l 0*100/h
Integral time S2 Pulse- req. S2
000 sec. 0*100/h
Direction S1
Basic settings Raise
Basic settings 
.
Direction S2
Contr. settings  lower
or an impulse-frequency controller you have to set the following parameters:
1) Set points S1 and S2
S1 refers to relay 1, S2 refers to relay 2.
2) P range and integral action time for S1 and S2
Adjust a P range > 0. or a P controller set integral time = 0, for a PI controller set an integral time > 0.
3) The acting direction for S1 and S2
Select „raise“ if the dosage raises the measured value.
Select „lower“ if the dosage lowers the measured value.
4) Pulse-frequencies for S1 and S2
Enter the maximum pulse-frequency that corresponds to 100% dosage.

Manual OPTISE S AAC 050
OPTISE S AAC 050 20
5.3 P / PI controller as pulse-pause controller
Main menu
.
.
Set points and
controller versions
Set points  Set point S1 You can choose
.
1.50 mg/l Controller settings different controller
.
P range S1 Pulse- req. S1 versions for S1 and S2.
0.20 mg/l 00*100/h
Integral time S1 Pulse- req. S2
000 sec. 00*100/h
Set point S2 Direction S1
.
0.50 mg/l Raise
P range S2 Direction S2
0.20 mg/l Lower
Integral time S2
.
000 sec.
.
Pulse + Pause The pulse+pause time
Basic settings 10 s Must be at least twice
Basic settings 
.
Least Pulse As long as the least
Contr. settings  0.1 s Pulse time.
or a pulse-pause controller you have to set the following parameters:
1) Set points S1 and S2
S1 refers to relay 1, S2 refers to relay 2.
2) P range and integral action time
Adjust a P range > 0. or a P controller set integral time = 0, for a PI controller set an integral time > 0.
3) Pulse-frequencies for S1 and S2
Both frequencies must be set to 00, otherwise the controller will act as an impulse-frequency controller.
4) The acting direction for S1 and S2
Select „raise“ if the dosage raises the measured value.
Select „lower“ if the dosage lowers the measured value.
5) Pulse + pause time
Define a period of time during which the relay is proportionally to the control deviation ON (pulse) or O
(pause), respectively.
6) Least pulse time
Set a minimum pulse time that the relay has to at least remain open to allow the actuator to react.