Universal Controller Dr Riss

Operating Instruction

Universal Controller

B_UC_12504_e_ohne_Klemmenplan.doc/pdf Oktober 04

Please read this instruction carefully before using this device!!

Operating Instruction Universal Controller

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Contents

1. Introduction .............................................................................................................................2 2. Functional Description ............................................................................................................2 Control.........................................................................................................................................2 Control-Characteristic .................................................................................................................2 Level-Monitoring ........................................................................................................................2 Release-Contact...........................................................................................................................3 Alarm Delay ................................................................................................................................3 Start-Up after Power Failure .......................................................................................................3 3. Description of Terms...............................................................................................................3 Output Signal / Controller Output ...............................................................................................3 Proportional Control....................................................................................................................3 Integral Part / Reset Time TR ......................................................................................................3 Derivative Action Time TV .........................................................................................................4 Dosing Time Limit ....................................................................................................................4 Start-Up Delay.............................................................................................................................5 Flow-Control Time......................................................................................................................5 Minimum and Maximum Output ................................................................................................5 4. Operation.................................................................................................................................6 4.1. Operation-Mode and Main-Menu ........................................................................................6 4.2. Menu Controller Set-up........................................................................................................7 Set-point (+) ................................................................................................................................7 Set-point (-) .................................................................................................................................8 Alarm minimum ..........................................................................................................................8 Alarm maximum .........................................................................................................................8 P-Range .......................................................................................................................................8 I-Reset-Time................................................................................................................................8 D-Action Time ............................................................................................................................8 Minimum Output.........................................................................................................................8 Maximum Output ........................................................................................................................8 4.3. Menu Controller Calibrate....................................................................................................9 4.4. Menu Controller Configuration..........................................................................................11 Maximum Dosing Time ............................................................................................................11 Start-Up Delay...........................................................................................................................12 Current Output...........................................................................................................................12 Controlled Variable ...................................................................................................................12 Output........................................................................................................................................12 Alarm-Delay..............................................................................................................................13 Flow...........................................................................................................................................13 Minimum Relay.........................................................................................................................13 Maximum Relay........................................................................................................................13 Language ...................................................................................................................................13 A: Error-, Alarm- and Status-messages.....................................................................................14 B: Datasheet ..............................................................................................................................15 C: Configuration........................................................................................................................16 D: Start-Up of the Control-Loop...............................................................................................16 E: Controller Reset ....................................................................................................................17 F: Terminal Description ............................................................................................................18 G: Standards ..............................................................................................................................18


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1. Introduction The 1-Channel-Controller / Universal-Controller is a measurement and control device for many applications. All standard measurements like the treating of drinking water or swimming-pool water, pH, ORP, Chlorine-/ Chlorine-dioxide-concentration, Ozone, Hydrogenperoxide Peracetic acid and oxygen concentration can be done with this device. All common dosing devices like solenoid valves, motor-valves, O3-generators, metering pumps or 20 mA-controlled devices can be connected to the controller. The dosing device and the measured value can be selected in the configuration menu. The Universal-Controller has a PID characteristic (which can be changed into single P-, PI-, or PD-characteristic) 2. Functional Description Control The Controller measures the selected value, compares the measured value to the preset parameters and controls the dosing device to get the measured value between the set-points and keep it there as accurate as possible. The Universal-Controller is a two-in-one controller with different dosing goals. One part of the controller can lower the measured value, the other one raises it. The PID-characteristics, are the same for both parts of the controller only the set-points have to be selected for each single part. The concept with the two set-points gives you the chance to define a tolerance range. You can make only one part of the controller work, if it is necessary to only dose into one direction, like it is with chlorine. Control-Characteristic The Controller can be configured as a P, PD, PI or PID-Controller, by setting the parameters: P-range, I-reset time and D-action time. P-Controller: the dosing depends on the momentary deviation from the set-point. PI-Controller: the dosing depends on the momentary deviation from the set-point

and the total deviation since the start-up of the controller. PD-Controller: the dosing depends on the momentary deviation from the set-point and the modification run of the measured value. PID-Controller: the dosing depends on the momentary deviation from the set-point, the total deviation since the start-up of the controller and the modification run of the measured value.

The PI-Controller is probably the best selection for most uses. It has a good control performance and is quite easy to adjust. The PID-Controller even has a better control performance, but is much more difficult to adjust. Level-Monitoring The controller has two level-switch-inputs for monitoring the levels of the chemicals for dosing. In case of low level, the level-switch closes, and an alarm is set and dosing for the corresponding channel is stopped (run dry protection).


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Release-Contact The controller has one release-contact to attach a flow-control or any external controller. The activity of the release-contact can be delayed, by setting a start-up-delay. With every contact of the release-contact the start-up-delay will be active. The flow-control-time delays the stopping of the controller, when no flow is registered. Alarm Delay The release of an alarm can be delayed from 0 to 7200 seconds. Start-Up after Power Failure All settings will be stored in case of a power failure. Only the part of the data of the PI-Controller is lost, in which the total deviation since the start-up of the Controller is stored. The controller will start up again with the last settings, the dosing will be delayed until the start-up-delay-time has passed. If the Controller was stopped by the menu-command controller stop, the Controller will still be stopped after the main power is back on. 3. Description of Terms Output Signal / Controller Output The output signal (controller output) is the output quantity, which is being calculated by the Controller, to each a given set-point. Depending on the dosing device it can be a pulse width modulated signal with variable ON / OFF intervals for motor pumps, a variable frequency for frequency controlled metering pumps or an aperture angle for motor valves. Proportional Control To control a variable, e.g. the concentration of free chlorine in water, the proportional Controller generates an output signal, meaning here the amount of added chlorine, which is proportional to the deviation between the measurement and the set-point. In this context the proportional band (P-range) is specified as the deviation from the set-point where the maximum output signal is generated. Example: A chlorine Controller having a proportional band (P-range) of 0.1 ppm and a

set-point of 0.4 ppm regulates a frequency controlled dosing pump with a maximum of 6000 strokes per hour (st/h). At a measurement of 0.3 ppm the output signal will be 6000 st/h. At a measurement of 0.35 ppm the output signal will be 3000 st/h.

Integral Part / Reset Time TR For the regulation of an output quantity the integral controller generates an output signal that is proportional to the sum of the past deviations from the set-point. The output signal of the integral controller increases at a constant deviation from the set-point and decreases only after the set-point has been passed. The integral controller is adjusted with the parameter I-Reset Time. The Reset-Time is the time span, which is needed by the integral controller to generate the same output signal as the one being immediately generated by the


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proportional controller. The longer the Reset-Time, the smaller is the influence of the integral controller to the entire Proportional-Integral (PI) regulation. Example: A chlorine controller having a proportional band of 0.1 ppm and a set-point

of 0.4 ppm regulates a frequency controlled dosing pump with a maximum of 6000 strokes per hour (st/h). At a measurement of 0.35 ppm the output signal from the P-Controller will be 3000 st/h. Having a reset time of 10 minutes, the Integral Controller will, at a constant deviation of 0.05 ppm, generate an output signal of 3000 st/h after 10 minutes. The entire PI regulation will then generate an output signal of 6000 st/h.

The output signal of the Integral Controller will only decrease when the measurement passes the set-point. With such a summing (integrating) property, the Integral Controller can determine e.g. the actual chlorine consumption and the necessary base dosing, making sure that the set-point will be maintained with a high accuracy. Derivative Action Time TV The derivative control unit (D-unit) of the controller generates an output signal that is proportional to the variation speed of the controlled variable. The derivative control unit acts against the variation of the controlled variable. The derivative action time is the time that a P-Controller would need for a constant variation speed to generate the same output as the D-unit generates immediately. Example: The PD-Chlorine Controller of a swimming pool has a set-point of 0.4 ppm,

a P-range of 0.1 ppm and a derivative action time of 30 seconds. 30 children jump into the water for a swimming lesson and immediately the chlorine concentration decreases, lets pretend about 0.03 ppm/10 seconds. A P-Controller generates a small control-output that increases only with the decrease of free chlorine. Within 33 seconds, the chlorine concentration has fallen to 0.3 ppm. That means the P-Controller needs 33 seconds to generate ist maximum output. In this case the D-unit would generate an output of almost 100%, as long as the chlorine falls with a variation speed of 0.03ppm/10 seconds and acts against the decrease of the chlorine concentration.

Dosing Time Limit In order to prevent dangerous over-dosing or even wrong dosing due to electrode failure, it is possible to limit the maximum dosing-time of the controller. The maximum dosing-time is the time span in which the set-point has to be reached. If the set-point is not reached within the maximum time, an error in the dosing system is assumed (e.g. dosing pump failure, dosing tube failure, electrode failure, cable disconnected) and dosing is stopped.


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Start-Up Delay If the flow of measurement water is stopped, the properties of the water are not the same as those of the pool water, meaning that the measurement is not representative. When the measurement flow starts up again, it will take some time until the water in the measurement circle is representative for the pool water again. The purpose of the start-up delay is to prevent a wrong dosing during this time span. The start-up delay is activated at every start, no matter how the controller was started (manual start, switching the controller ON, external start by release-contact). Flow-Control Time In some dosing systems, the pressure of the measurement water can vary. This could be mistaken by the flow-control as no flow. To prevent the Controller from stopping, a time can be set in which the flow should be normal again. That means that the Controller will only set an alarm, when the flow is down for a longer time than the flow-control time is set. Minimum and Maximum Output The minimum and maximum controller output can be set as a percentage from the maximum effective dosing of the dosing system. These parameters can be used to adjust a dosing system to a control loop. Example: A 10 L/h pump is attached to a chlorine control loop. The pump is too big

for this application. You may use the maximum output parameter to reduce the maximum output to 60% which turns the pump effectively into a 6 L/h pump.

The minimum output is very important when using the pulse-width-modulated output. A motor pump might need a certain ON-time before it starts to pump effectively. In this case you will need a minimum ON-time or minimum controller output. Example: The cycle time for pulse-width-modulation is 30 seconds. A minimum

output of 10% will result in a minimum ON-time of 3 seconds. That means, whenever the controller will generate an output signal, it will be at least 3 seconds long, giving the connected pump enough time to dose some volume.

If the Universal-Controller is used as a pure P-Controller and you have a constant disturbance e.g. chlorine-loss, the set-point can never be reached because the P-Controller needs a deviation to produce any output. You may use the minimum output-parameter in this case to increase the dosing beneath the set-point.


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4. Operation Overview The Universal-Controller has two major operating modes:

a) measure and control (operation-mode) b) set-up and configure (menu-mode)

Use the MODE key to change between the operation-mode and the menu-mode. Within the menu-mode you can choose a menu-item with the UP and DOWN keys. You enter a selected sub-menu or a parameter setting by pressing the OK key. You also use the OK key to store a modified parameter value and exit the setting. The MODE key is used to abort a setting and leave a sub-menu. In the operation-mode the OK key is used to restart the Controller, reset alarms and skip the start-up delay. 4.1. Operation-Mode and Main-Menu In the operation mode there are three display modes. You can toggle between them with the UP and DOWN keys. The first mode shows the actual Controller output s a percentage, the second one as a bar graph. The dosing direction is shown as a + or sign, the third one showes the time and dafe.

pH: 7.23 (23.1) dosing 83% +

pH: 7.23 (23.1) (+)

Controller stop

Controller Set up

Controller calibrate

Controller configuration

ModeMode

ph: 7,23 08:15

Switch from the operation-mode to the menu-mode with the MODE key. The display shows CONTROLLER / STOP. You can choose one of the four main-menu items with the UP and DOWN keys. 1. Controller stop: stops the Controller, all dosing outputs are disabled,

measurement continues. 2. Controller set-up: sub-menu with all parameters for the control characteristic 3. Controller calibrate: sub-menu for calibration 4. Controller configuration: sub-menu for the configuration of the Controller (measured values, output type, start-up delay)


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You enter any sub-menu by pressing the OK key. If you select the menu-item CONTROLLER / STOP with the OK key, all dosing outputs will be disabled and the Controller will turn back to the operation-mode. It is just measuring not controlling now! You can restart the Controller by pressing OK. The start-up delay will be initiated, but you can skip the start-up delay by pressing OK a second time. Within a sub-menu you can choose a parameter with the UP and DOWN keys. If you want to modify a parameter value, press OK. A little star (*) appears in the upper right corner of the display, that shows you that you can modify the parameter now. You can increase the value with the UP key and decrease it with the DOWN key. You can abort by pressing the MODE key. All modifications will then be lost. To end the setting and store the new value press OK. Some menu-items like CONFIGURATION / SIGNAL OUTPUT make several settings available. The general rule for these settings is: OK confirms / accepts and let you continue. MODE aborts without storing new values! 4.2. Menu Controller Set-up The sub-menu CONTROLLER / SET-UP contains all parameters for the controller characteristic, like set-points, P-range or minimum output. You enter the menu by choosing it in the main menu with the UP and DOWN keys and pressing OK. Then you can choose a parameter with the UP and DOWN keys. If you want to modify a parameter press OK. a little star (*) appears in the upper right corner of the display that indicates that you are now modifying the parameter value. You accept and store the new value by pressing OK or abort with MODE. Set-point (+) The lower set-point. If the measured value falls below this set-point the dosing starts (raise). Example: setting the lower set-point

- the controller is in operation-mode - press the MODE key to enter the menu-mode - press the UP key once; the menu-item CONTROLLER / SET- UP is

displayed - press OK to enter the CONTROLLER / SET-UP sub-menu - the actual setting of the set-point (+) parameter is displayed - press OK to modify the value; a little star (*) appears in the upper right

corner of the display that indicates that you are now modifying the parameter value

- raise or lower the value with the UP or DOWN keys - if you hold down the key for more than 1,5 seconds an auto-repeat

function is activated


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- to store the new value press OK; the little star (*) in the upper right corner of the display disappears and your modification is now stored. Pressing the MODE key instead of OK will abort and the new settings will not be stored.

- you leave the sub-menu by pressing the MODE key - you leave the main-menu by pressing the MODE key once again

Set-point (-) The upper set-point. If the measured value raises above this set-point the dosing starts (lower). Alarm minimum The lower alarm value. If the measured value falls below this value an alarm is raised. Alarm maximum The upper alarm value. If the measured value raises above this value an alarm is raised. P-Range Proportional band of the controller defines the gain of the controller. The P-range is always set in the same unit as the measured variable, that means pH-steps for pH, millivolt for ORP and ppm for Chlorine / Chlorine-dioxide measurement. The smaller the P-range the higher is the gain of the controller. I-Reset-Time Integral reset time in seconds. The possible range is 1 to 3600 seconds. A reset time of 0 means infinite, meaning that the I-part of the controller is turned off. The influence of the integral-part decreases with increased reset-time. D-Action Time Derivative-action time in seconds. The possible range is 1 to 3600 seconds. The D-part increases with longer action times. A D-action time of 0 means that the D-part is inactive. Minimum Output The minimum control output as percentage of the maximum dosing capability of the dosing device. Maximum Output The maximum control output as percentage of the maximum dosing capability of the dosing device.


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4.3. Menu Controller Calibrate The sub-menu CONTROLLER / CALIBRATE contains menu-items for the calibration. You enter the menu by choosing it in the main-menu with the UP and DOWN keys and pressing OK.

Controller calibrate

Calibrate Temperature

Calibrate Cal.-measurement

Setting up the temperature ( only needed while calibrating ph+ with manual tempeature compensation )

Calibration with measuring the bufferfluid

Calibration with one ore two points

Calibrate Zeropoint

Zeropointcalibration-only for probs who needs to calibrate the zeropoint

Display of the Raw-Measurement during Calibration You can see the raw-measurement (the non-calibrated voltage level of the A/D converter) during the calibration procedure by pressing the DOWN key. The non-calibrated voltage will be displayed in the upper display line, as long as you hold the DOWN key down. Temperature You can choose between automatic and manual temperature-compensation of the pH measurement. If you choose manual temperature-compensation you have to enter the temperature of the liquid during normal operation. Example: The operating-temperature of your control-loop is 50C. Enter this

temperature under the menu-item CALIBRATE / TEMPERATURE and the controller will adjust the gain of the pH-sensor to the correct value for this temperature.

Calibrating-Measurement To calibrate the different sensors you need a reference-measurement. The calibration procedures differ between the possible configurations: pH-Probe To calibrate a pH-probe you need two different buffer-solutions. One has to have pH 7 the other one can be pH 4, 5, 6, 8, 9 or 10. Select the menu-item and press OK. Take the probe out of the flow armature, dry it with a clean cloth and dunk the probe into the first buffer. Stir at least 30 seconds in the buffer solution, then press OK. Now enter the temperature of the buffer solution during the calibration. The temperature is entered manually because in most cases it is much more convenient to measure it manually than to dismantle the PT 100.


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As soon as you press OK again, the measurement will start. The measurement takes 15 seconds. After the measurement, the controller displays the estimated buffer value. You can correct this value using the UP and DOWN keys. Press OK when finished. Now take the probe out of the first buffer, dry it with a clean cloth and dunk it into the second buffer solution. Stir at least 30 seconds and the press OK to start the second measurement. After 15 seconds the controller displays the estimated value. Again, you can correct the value using the UP and DOWN keys. Press OK when finished. After the calibration is done, offset and gain of the probe are calculated and displayed. In case of a failure a message will be displayed. Please be aware of the fact that the pH-probe might need up to one minute to get a stable output for a buffer. In this case stir a little longer before pressing OK to start the measurement. ORP-Probe A ORP-probe can not be calibrated. You can only test it! Take the ORP-probe out of the flow armature and dry it with a clean cloth. Dunk the probe into a buffer solution of 475mV for a few seconds. The measured value will be displayed. Chlorine / Chlorine Dioxide / Ozone / Hydrogenperoxide / Peracetic acid Probe For calibrating such a probe you need an analytical measured value. Chlorine, chlorine dioxide, or ozone concentration is to be determined with the DPD-method. Hydrogen peroxide or peracetic acid is to be determined by a titration (see instruction manuall of the sensor) Example: - the controller is in operation mode.

- press the MODE key to enter the menu mode. - press the UP key twice; the menu item CONTROLLER / CALIBRATE

is displayed. - press OK to enter this sub menu. - the display shows CALIBRATE / CAL.-MEASUREMENT. - Press OK - press OK to start the measurement. (count down of 15 sec) *1 - The Display shows MEASURE VALUE, adjust the displayed value with

the UP and DOWN keys to the value determined by the analytical measurement.

- Press OK the new calibration is stored or press MODE to abort - Display shows the slope of the sensor. If the slope is too high or too low

an error will be displayed. - press OK and then twice the MODE key to get the operation mode (for a

short time software release number and other informations are displayed.)

No zero point adjustment is possible.


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*1: If you press the key DOWN () during the count down, you see the original signal from the sensor in Volts. A correct signal must be negative. Zero-Point Some controller-configuration need zero-point adjustment. At the menu-item ZERO-POINT you can calibrate the zero-point of your measurement. The zero-point adjustment is necessary when you get the measured value from a current input or when you use specific measuring probes. You have to make a calibrating measurement at the zero-point of the measuring probe. 4.4. Menu Controller Configuration The sub-menu CONTROLLER CONFIGURATION contains the items to configure the type and the options of the controller itself. You enter the menu by choosing it in the main menu with the UP and DOWN keys and OK. You can now choose a parameter, if you want to modify one, press OK. You accept and store a new value by pressing OK or abort with MODE. Example: - the controller is in operation-mode

- press the MODE key to enter the menu-mode - press the DOWN key, the menu-item CONTROLLER /

CONFIGURATION is displayed - press OK to enter the sub-menu - the display shows the actual setting of the maximum dosing time - press the UP key three times; the actual selection of the controlled

variable is displayed - press OK to change this parameter: a little star (*) appears in the upper

right corner of the display. It indicates that you can change the variable now

- choose the controll variable using the UP and DOWN keys. Press OK. Then choose the decimal point (see measuring range of the sensor). Press OK. Then choose the measuring unit (see measuring range of the sensor). *2.

- to store the new setting press OK - press MODE - you are back in the sub-menu CONTROLLER / CONFIGURATION - leave the sub-menu and return to the main-menu by pressing the MODE

key - You should calibrate the controller for this new variable -

*2 If you will change the decimal point or measuring unit without changing the controll variable, then you must first select another controll variable and install this. Then start again this procedure and choose your old controll variable. Now you can set the decimal point or respectively the measuring unit. Maximum Dosing Time The maximum dosing time in minutes. This is the maximum time that the controller has to control a deviation. If the set-points are not reached within this time, the controller assumes a failure, stops the dosing and raises an alarm. The alarm is automatically reset if the


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measured value gets into the range between the lower and upper set-points or if the alarm is manually reset by pressing OK. Start-Up Delay Start-up delay time in minutes. This delay is initiated after each start of the controller and disables the dosing outputs until this time is over. You can skip the start-up delay by pressing OK. Current Output In the menu-item CONFIGURATION / CURRENT OUTPUT you can choose between 0-20mA or 4-20mA output. Select the menu-item with the UP and DOWN keys and press OK. Controlled Variable The type of measurement system to control. You can choose one of the following options: (Potentiometric sensors): pH: with manual temperature compensation, pH (temp.-comp.): with automatic temperature compensation, ORP: or any voltage system between 1.2V and +1.2V, (amperometric sensors): chlorine or chlorine dioxide, ozone, hydrogen peroxide, peracetic acid, and additionally you must choose the decimal point (2.000 / 20.00 /200.0 /2000) and the measuring unit (mg/L / ppm / %). (PT100): Temp.: temperature controller If the regulating variable is changed, all controller PID-parameters and the signal output are set to defaults. For chlorine, chlorine dioxide, ozone, hydrogen peroxide, peracetic acid and ORP the controller function for reducing the concentration is automatically deactivated. The SET POINT (-) is set to the upper end of the measuring range. Output Configuration of the used controller output. You can choose between the following options: Off: no dosing Pulse: pulse-frequency output from reed-relay for metering pumps Pulse-width: modified duty-cycle (ON-OFF time) of 230VAC relays within 30seconds

for motor-pumps 2-state: 230VAC relay turns ON for dosing 100% and turns OFF for dosing smaller

than 1%. The controller can be configured as a simple 2-state controller with switching hysteresis: reset-time = 0 (infinite) and derivative action time= 0 and the proportional band is corresponding to the hysteresis

0-20mA(+): 0-20mA output rising direction 4-20mA(-): 4-20mA output rising direction 0-20mA(-) : 0-20mA output lowering direction 4-20mA(-): 4-20mA output lowering direction valve (+): motor-valve with position-feedback valve (-): motor-valve with position-feedback


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Network For connecting the controller to a network or a PC, an address and code are required. At this menu-item you can first enter the address then your code. The code has four figures from 0 to 255 which are shown in the hexadecimal scheme. Enter the code with the UP and DOWN keys. The network or pc function can only be use with a special software. Alarm-Delay Time-delay for minimum / maximum alarms in seconds. After appearing of an alarm situation the response of the relays are delayed for the set time. If the alarm situation disappears before the end of this time, no alarm will be set. Flow Control-time for the flow in seconds. The flow-control-time is the maximum time-span in which the flow may be down, before an alarm is raised and the controller stops. Minimum Relay Never all relays are used. A relay that is not used, can be set as an additional minimum-relay in this menu-item. Use this menu-item when you need an additional or a from the other alarms separated minimum contact. Maximum Relay Never all relays are used. A relay that is not used, can be set as an additional maximum-relay in this menu-item. Use this menu-item when you need an additional or a from the other alarms separated maximum contact. Language The language of the menu of the controller. You can choose between German and English.


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A: Error-, Alarm- and Status-messages start-up delay the start-up delay is still active, the dosing outputs are still disabled controller stop the controller is stopped dosing time the maximum dosing time has been exceeded: for security reasons

the dosing is stopped and an alarm is set upper alarm the measured value is above the upper alarm level, the alarm relay

and the maximum relay are active lower alarm the measured value is below the lower alarm level, the alarm relay

and the minimum relay are active (+)-level-alarm the tank with the pH(+) chemical (alkaline solution) is empty, the

dosing for this chemical is stopped (-)-level-alarm the tank with the pH(-) chemical (acid) is empty, the dosing for this

chemical is stopped ? manual control the OK key was pressed during dosing operation, the controller is

waiting for OK or MODE to be pressed cal.-error a failure during calibration has occurred equal buffers the same buffer solution has been used twice for calibration of the

pH-probe no pH7 buffer no pH7 buffer solution was applied at the calibration. One of the two

solutions has to be pH7! gain the gain of the sensor is not within the tolerance - the sensor might

be defective or the input of the buffer value was incorrect offset the offset of the sensor is too big - the sensor might be defective or

the input of the buffer values were incorrect


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B: Datasheet processor: modern powerful CMOS -controller control panel: LC-display with background light and four keys measurement range: pH 0-14 ORP 1200mV to +1200mV chlorine / chlorinedioxide / ozone / hydrogen peroxide / peracetic

acid range: 2.000 / 20.00 / 200.0 / 2000, units: mg/L / ppm / %

Inputs: pH- and ORP probes (SN6) chlorine, chlorine-dioxide, ozone, hydrogen peroxid, peracetic acid

(4-pole socket) Outputs: 2 pulse-frequency with reed-relay (48VDC/40mA) for metering

dosing pumps 2 230VAC/2A Pulse lenght for motor-valves or motor-pumps 1 Limit contact 2A 0/4-20mA control output for current-controlled dosing devices 0/4-20mA signal output for recorders, remote displays Controller: P, PI, PD or PID-Controller Description: The Universal-Controller can be configured as a pH, ORP, chlorine,

chlorine dioxide, ozone, hydrogen peroxide, peracetic acid- or temperature-controller by specific software..

The controller has two dosing-directions for pH: lower and raise. when controlling chlorine, chlorine-dioxide or ORP the lowering dosing-direction is disabled.

Dosing-outputs are reed-contacts for -metering pump , Relay contacts for motor-pumps or motor-valves and a current-output. The current-output can be adjusted for one dosing-direction.


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C: Configuration There are many ways and options to configure the Universal-Controller. But not all combination do make sense. Configuration of 2-point-controller: If the controller is configured to have an ON/OFF output-characteristic, it is very difficult to use the PID parameters correctly. The ON/OFF output is intended to be used without the I- and D-parts (integral-reset-time = 0 (infinite), derivative-action-time =0). The minimum output has to be 0%, the maximum output has to be 100%, then the P-range is the hysteresis for switching the contact. If you want to use a 230VAC contact and PID it would be better to select a pulse-width-modulated output. Pulse-width-modulation: In control loops where the time-constants are shorter than 30 seconds, the pulse-width-modulated outputs loose their continuity: D: Start-Up of the Control-Loop All controllers with an integrating part tend to overshoot. When starting up a control-loop, the integral part might lead to a big overshot. It might be useful to start up the loop with a pure P-controller and add the I- and D-units later or to reset the integral-sum manually by pressing OK as soon as the measurement value approaches the set-point.


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E: Controller Reset


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F: Terminal Description Terminal Description Terminal Description 1 230VAC or 110 VAC, 50/60 Hz

L / Phase 22 + 0/4..20mA Control output

2 0V N 23 - 0/4..20mA Control output 3 Protective earth PE 24 + 0/4..20mA Signal output 4 Contact direction + (230VAC/

2A) 25 - 0/4..20mA Signal output

5 0V N 26 Release contact Input for open collector

6 Protective earth PE 27 Release contact 15 V

7 230VAC / 50Hz or Common

28 Release contact GND

8 Contakt direction - (230VAC/ 2A)

29 Release contact 24V

9 0V N 30 Release contact / Input 24V 10 Protective earth PE 31 Level switch direction - /24V 11 230VAC / 50Hz

or Common 32 Level switch direction -

Input 24V 12 Alarmcontact norm. close 33 Level switch direction + /24V 13 Alarmcontact norm. open 34 Level switch direction +

Input 24V 14 Alarmcontact common 35 Position feedback valve + 5V 15 Reedrelay direction + 36 Position feedback - - pickoff 16 Reedrelay direction + 37 Position feedback - - GND 17 Reedrelay direction - 38 20VDC unstab. for 20mA Sensor 18 Reedrelay direction - 39 20mA Input 19 Rs232 RxD / Rs485 Line A 40 20mA GND 20 Rs232 Signal ground 41 Pt 100 Signal 21 Rs232 TxD / Rs485 Line B 42 Pt 100 GND

G: Standards The Universal-Controller is CE-compliant. The following european standards have been used: EN 50 081-1 EN 50 082-2 EN 60 555-2 EN 60 555-3

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Universal Controller Dr Riss