DEPOLOX 4 BA E. MICROPROCESSOR BASED ANALYSING AND CONTROL SYSTEM FOR CHLORINE, ph AND REDOX IN POTABLE WATER AND SWIMMING POOLS

Transcription

1 Wallace & Tiernan GmbH D Günzburg Telefon (08221) Telefax (08221) DEPOLOX 4 MICROPROCESSOR BASED ANALYSING AND CONTROL SYSTEM FOR CHLORINE, ph AND REDOX IN POTABLE WATER AND SWIMMING POOLS BA E

2 SALES ORDER NO. VA... NOTE: The equipment has been made of first-class material and should perform satisfactorily if properly operated and maintained. It is therefore most important that the instructions be read, and understood, prior to installation, operation or maintenance. Our guarantee is conditional upon the equipment being treated in accordance with this instruction. To avoid errors please refer to the order number when corresponding with us. Not parts may be disassembled during the guarantee time without our permission. At significant disturbances we recommend to call for our trained service personnel. 2

3 GUARANTEE For a period of one year after shipment, we undertake to repair or replace free of charge, f.o.b. Günzburg, all equipment or parts of our supply that have failed due to defects in workmanship or material, provided that these parts have been used under normal operating conditions. Replaced parts shall become our property. For parts not manufactured by us, especially electrical parts, our liability shall be limited to the guarantee granted by our vendor. On the buyer s request we will cede the vendor s guarantee to the buyer who shall then be solely responsible for the implementation of the vendor s guarantee. Defects caused by normal wear, faulty operation, negligence or unsuitable process materials, are excluded from our guarantee. Also excluded are defects caused by unauthorised modifications or repairs performed by the buyer or a third party. The guarantee period will not be extended or renewed after a modification of the equipment or the replacement of parts. Defects not caused by our fault, for instance defects caused by faulty operation, use of unsuitable chemicals or disobedience of the instruction manual, will be corrected by us on the buyer s request, at current prices and service charges. Place of jurisdiction for all law suits regarding our supply or other legal matters shall be the county court (Amtsgericht) of Günzburg or the district court (Landgericht) of Memmingen, regardless of the extent of the claim. 3

4 CONTENTS PAGE 1. GENERAL 8 2. DISINFECTANTS IN WATER - LIMIT VALUES Chlorine (Cl 2 ) Chlorine dioxide (ClO 2 ) Ozone (O 3 ) 9 3. DEPOLOX 4 - INSTALLATION AND THEORY OF OPERATION Installation of a complete chlorine residual analyser DEPOLOX Theory of operation Temperature compensation INSTALLATION Location of installation Sample water take-off Sample water drainage STARTUP Depolox 4 analyzer (pressureless type) Depolox 4 analyzer (pressure type max. 1.5 bar) Amplifier for chlorine measuring cell DEPOLOX CALIBRATION OF THE DEPOLOX 4 AMPLIFIER Calibration of range Calibration of bias voltage Zero calibration Zero calibration with chlorine-free water Zero calibration in case of a combination of 18 chlorine and ozone 6.6 Measured value calibration Chemical analysing methods MAINTENANCE Zero point and measured value check Servicing of the reference electrode Change of grit Strainer Electrodes Chemical and mechanical cleaning Spares for maintenance 21 4 edition 06/1994

5 8. TROUBLESHOOTING 22 PAGE 9. ph-value ANALYSER ph probe with special cable Startup of ph-value analyser Maintenance of ph probe ph-measurement using the phenol red method Spare parts and chemicals for maintenance REDOX ANALYSER Redox probe with special cable Start-Up Maintenance of the redox probe Spare parts and chemicals for maintenance AMPLIFIER Installation Dimensions of basic unit, plug-in amplifiers 31 and COM interface card 11.2 Electrical installation Front panel Keypad Parameter and function menus - set-up and 34 changing of settings 11.6 Basic amplifier setup CHLORINE MEASURING AMPLIFIER Paramter menus (standard Cl 2 amplifier) Function menus (Cl 2 amplifier) Paramter set-up during initial operation Control element electric positioner or regulating valve Control element metering pump, solenoid pump, continuous output Adjustment of feedback display Potentiometer feedback (standard factory setting) ma feedback Adjustment of the feedback display 42 5

6 PAGE 13. ph MEASUREMENT AMPLIFIER Parameter menu (standard ph amplifier) Function menu (ph amplifier) Set-up of control parameters for initial operation 46 (parameter menu) For metering pumps (pulse duration or 46 continuous controller) For solenoid pumps (pulse frequency controller) For electric positioners and regulation values 46 (step rate controller) 14. REDOX MEASUREMENT AMPLIFIER Parameter menu (standard Redox amplifier) Function menu (Redox amplifier) ERROR MESSAGES INTEGRATED CONTROLLER (OPTION) Three-step controller for servomotor Metering pump controller (pulse duration controller) Solenoid pump controller (pulse frequency controller) Controller with continuous output Control parameters and their influence on the control loop ADAPTATION OF THE CHLORINE AMPLIFIER Use of the adaptation Preconditions for the adaptation Adaptation menus Sequence of the adaptation Ending the adaptation sequence Ending of the adaptation without error Ending of the adaptation with error Determination of the controller parameters using Tu and Ts COM INTERFACE CARD SERVICING AND REPAIR TECHNICAL DATA DEPOLOX 4 measuring cell Basic unit for wall mounting Chlorine residual amplifier ph measuring amplifier Redox measuring amplifier 72 6

7 21. DRAWINGS AND WIRING DIAGRAMS - BZ-1150/1-4/E Residual analyser DEPOLOX 4 Abb. 2, Abb. 2A-E - BZ-1150/5-5/E Residual analyser DEPOLOX 4 pressurised cell Abb. 2F - BZ-1150 Cellule de measure DEPOLOX 4 with bill of Material - BZ-1141/E Flow regulator, complete with bill of material - BZ-1179/E Sample water take off unit for DEPOLOX 4 with bill of material - BZ-1165/E DEPOLOX 4 sample water arrangement - BZ-1166/E Sample water arrangement incorporating sample water pump with bill of material - BZ-1167/E Sample water arrangement incorporating sample water pump with bill of material - BZ-1184 Housing complete / U with bill of material - 30-E-7585 (sheet 1 - sheet 7) Typical wiring diagrams for Cl 2 module - 30-E-7578 sheet 1 Wiring diagram - amplifier for panel mounting - 30-E-7578 sheet 2 Connection COM card - U Wall housing with bill of material - U Panel mounting housing with bill of material - U Panel mounting housing with bill of material - U Panel mounting housing with bill of material - BZ-1145 Label to the amplifier - Impendance converter BZ-1222-E and BZ-1223-E - BZ-1245-E Table of amplifiers - WN-343 Connection parts for PVC-hose PAGE 7

8 1. GENERAL The disinfection of potable water, swimming pool water and industrial water is usually achieved by the addition of either chlorine, chlorine dioxide, sodium hypochlorite, anorganic chlorine compounds or in combination with ozone. It is very important to dose these disinfectants properly in order to achieve the correct residual. An insufficient residual of the disinfectant may result in poor disinfection, whereas an excessive residual may affect the taste of the water unfavourably or cause corrosion in the water lines. The DEPOLOX 4 residual analyser may be used for the continuous measurement of disinfectant residuals such as chlorine, chlorine dioxide or ozone. With additional equipment the dosage of these disinfectants may be controlled and recorded. The unit may also be used to check water which must not contain any disinfectants (e.g. to check that no ozone is present after the water has passed through a dechlorination filter). 2. DISINFECTANTS IN WATER - LIMIT VALUES 2.1 CHLORINE (Cl 2 ) According to current German regulations, potable water must not contain more than 0.3mg/l of effective chlorine. This amount may be increased temporarily up to 0.6mg/l if required for sufficient disinfection. A further requirement is that potable water (and water used by the food processing industry) disinfected with chlorine shall contain at least 0.1 mg/l of free chlorine after chlorination. Processed swimming pool water (after flocculation, filtering and chlorination) is required to contain mg/l of free chlorine in every part of the swimming pool. The water leaving the pool shall contain at least 0.3 mg/l of free and effective chlorine. If a treatment with ozone is included in the process, the content of free chlorine in the water shall be mg/l. NOTE! The presence of chlorisocyanurates (chlorine stabilisers) will strongly impair the measurement of chlorine residual. These chemicals, available in the form of granules or pills, are not approved for use in swimming pool water and must not be used in chlorine residual controlled systems. 8

9 2.2 CHLORINE DIOXIDE (ClO 2 ) Drinking water disinfected with chlorine dioxide is required to contain at least 0.05mg/l of chlorine dioxide after treatment. 2.3 OZONE (O 3 ) The ozone residual in water depends on the type of process used and should therefore be determined during operation. To remove ozone completely from water, the water can be passed through an activated carbon filter. Potable water must not contain any ozone. Swimming pool water is required to contain less than 0.05 mg/l of ozone before entering the pool. 3. DEPOLOX 4 - INSTALLATION AND THEORY OF OPERATION 3.1 INSTALLATION OF A COMPLETE CHLORINE RESIDUAL ANALYSER DEPOLOX 4 (see page 10) Sample water flows through the take-off pipe (1), the shut-off valve (2), the pressure reducing valve with strainer and gauge (3), the sample water line (4) and the flow regulator with check valve (9) into the chlorine measuring system (8). The flow regulator (9) is factory-adjusted and maintains a constant sample water flow through the measuring cell. If the measuring cell is of the pressureless type, the sample water flows via the drain line (6) into the drain funnel (5). For additional measurement of ph and Redox, the appropriate electrodes can be plugged into the body of the measuring cell. With these electrodes use is made of impedance transformers for reducing the high internal resistance of the electrodes. All signal lines are connected in the terminal block of the amplifier basic unit (17); the signals are processed by microprocessor-based amplifier modules for chlorine (16), ph value (15) and Redox (14). Option: These amplifier modules can be provided with an integrated controller for direct control of dosing pumps or control elements. A recorder (18) or a visual display device may be connected to the volt-free analogue amplifier output singal. A digital COM interface card (13) allows the transmission of measured data, on/off conditions and error messages to a printer (19). 9

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11 3.2 THEORY OF OPERATION (see BZ-1150/1-5/E, fig. 2, 2A-2F) The DEPOLOX 4 measuring cell consists of a 3-electrode system with external potentiostatic closed-loop control. The working electrode and the counter electrode (BZ-1150/3-5/E, fig. 2D, item 1 and BZ-1150/2-5/E, fig. 2B, item 2) of the half-ring type are made of a platinum alloy. A silver/silverchloride electrode serves as reference electrode (BZ-1150/2-5/E, fig. 2B, item 3); the contact between reference electrode and sample water is established by two membranes (BZ-1150/2-5/E, fig. 2B, item 7). The reference electrode is mounted in PVC brackets and completely submerged in electrolyte (BZ-1150/2-5/E, fig. 2A/B, item 60). The electrolyte container is transparent, thus enabling a visual check to be made of the amount of electrolyte in the reservoir. Replenishment of the electrolyte is possible without shutting down the measuring cell system. A membrane in the plug of the electrolyte reservoir provides the necessary equalization of pressure (BZ-1150/2-5/E, fig. 2A, item 17). The measuring cell is connected to a digital measuring amplifier which maintains an adjustable constant potential (Upot) between working and reference electrodes by means of potentiostatic closed-loop control. About 33 l/hr of the water to be analysed flows past this system of electrodes. The current generated in the measuring cell is directly proportional to the concentration of the oxidising agent in the sample water. This current is then passed to the microprocessor-based electronic system for processing. The surfaces of the electrodes are continuously cleaned by a special kind of cleaning grit in the electrode cell. The transparent plexiglass body of the cell makes it possible to observe the circulation of the grit in the cell. An integrated flow regulator (BZ-1141/E) ensures a constant sample water flow of about 33 l/hr. If desired, electrodes for ph-value and Redox measurement can be inserted into the two holes (BZ-1150/2-5/E, fig. 2A, item 48) in the removable cover of the measuring cell. This means that the DEPOLOX 4 measuring cell can be augmented with extra measuring devices without any additional piping. The following features of the DEPOLOX 4 ensure accurate, repeatable measured data and reduce the frequency of zero point recalibration: - potentiostatic control - continuous hydromechanical electrode cleaning system - regulated sample water flow. 11

12 3.3 TEMPERATURE COMPENSATION If temperature fluctuations in the sample water are expected to exceed ± 10 C (e.g. in hot-whirl-pool systems), temperature compensation is recommended. In this case the required Pt 100 temperature sensor is incorporated in the measuring cell block. In the range between 5 and 50 C, temperature compensation of the measured chlorine residual is performed automatically prior to display. During automatic operation of the analyser, the matrix display unit of the amplifier shows the temperature of the sample water. Further processing of the temperature signal is only possible via the digital COM interface card. 4. INSTALLATION 4.1 LOCATION OF INSTALLATION The DEPOLOX 4 unit should be protected from freezing temperatures, preferably installed in a heated room. When installing the unit, it is very important to consider both the chlorine contact time and mixing with the treated water. POTABLE WATER Adequate mixing of chlorine and water will be achieved if the distance between the point of application and the sample water take-off point is at least 10 times - preferably even 20 times or more - the diameter of the water line, e. g. if the diameter of the water line is DN 300, the minimum distance will be 300 mm x 10 = 3 m. The contact time is the time that elapses between chlorine application and chlorine residual measurement. It is made up of both the flow time in the main line from the point of application to the sample take-off point, and the flow time in the sample line from the sample take-off point to the DEPOLOX 4. It is recommended that the sample line be kept as short as possible. If extended contact times, e.g. 5 to 15 minutes, are required, a contact tank can be installed in the sample line directly before the measuring cell. It should be noted that in this case a flow and residual control system must be used. 12

13 SWIMMING POOL WATER The sample water take-off has to be installed in the return line to the pool. It should be observed that the sample water has to be taken off before flocculation agents are added and that the minimum pressure at the measuring cell must be 1.5 m head (0.15 bar). These instructions are applicable to chlorine, chlorine dioxide and ozone. The DEPOLOX 4 unit with amplifier should be mounted on a vertical wall, if possible at eye level, by fastening it with the 4 bolts supplied in the 4 mounting holes in the basic unit. Install the amplifier casing as close as possible to the measuring cell. The connecting cable between the measuring cell and amplifier has a standard length of 1.5 m. If local conditions require it, use can be made of an extended cable (max. length: 50 m) via a plug socket. It is essential to use a screened cable. The signal line must not be laid adjacent to any mains supply cable. 4.2 SAMPLE WATER TAKE-OFF IMPORTANT! Use a PVC hose (internal diameter 6 x 3) or a 6 mm PVC pipe for the sample water line and locate the unit to minimize sample line length. CAUTION: Copper pipes must not be used for the sample water line. Locate the sample water take-off to ensure optimum mixing of disinfectant and water, a continuous sample water flow without air bubbles as well as a constant ph-value in the range between 4 and 8. Depending on the local sample water pressure, one of the several sample water take-off assemblies available should be selected. The pressure at the inlet of the DEPOLOX 4 analyser must be within a 0.15 to 4.0 bar g range. In this pressure range, a constant water flow of 33 l/h is provided irrespective of pressure fluctuations. Water pressures of 4.0 to 40 bar g have to be reduced to 2.0 to 4.0 bar g by means of a pressure reducing valve at the sample water take-off. If the required minimum pressure of 0.15 bar is not available, a sample water pump has to be installed (BZ-1179/E, BZ-1165/E, BZ-1166/E and BZ-1167/E). 13

14 4.3 SAMPLE WATER DRAINAGE After leaving the measuring cell via the drain hose (page 10, item 6), the sample water flows to waste via the supplied drain funnel and a 15 mm PVC pipe (pressureless drainage). If the DEPOLOX 4 analyser cell used is of the pressure-resistant type, the back pressure in the sample water return line must not exceed a maximum of 1.5 bar; the sample water inlet pressure must always be 0.5 bar higher than the back pressure (max. inlet pressure: 2 bar). 5. STARTUP 5.1 DEPOLOX 4 ANALYZER (PRESSURELESS TYPE) (BZ-1150/1-4/E, fig. 2A-2E) 1. Unscrew nut (fig. 2A, item 46). 2. Remove cover (fig. 2A, item 41). 3. Pull electrode assembly down and out of cell block. 4. Remove felt ring (transport protection of membrane). 5. Exchange plug against separately supplied plug fitted with membrane for venting of the electrolyte reservoir. 6. Replace electrode assembly into cell block. NOTE! Keying pin (fig. 2D, item 58) must snap into position. 7. Allow sample to flow by opening linlet valve. 8. Fill a half capful of grit (U ) into the cell block. 9. Replace cover and tighten by nut. NOTE! After a running-inperiod of about one hour measuring cell and amplifier can be calibrated. A re-calibration should be made 24 hours after initial calibration. Air bubbles building up at the inner surface of the cell block and preventing somewhat the rotation of the grit will disappear after a runingin period of about 24 to 48 hours. 14

15 5.2 DEPOLOX 4 ANALYZER (PRESSURE TYPE MAX 1.5 BAR) (BZ-1150/5-5/E, fig. 2F) 1. Unscrew nut (fig. 2F, item 62). 2. Remove cover (fig. 2F, item 71). 3. Pull electrode assembly down and out of cell block. 4. Remove felt ring (transport protection of membrane). 5. Exchange plug against separately supplied plug fitted with membrane for venting of the elctrolyte reservoir. 6. Replace electrode assembly into cell block. NOTE! Keying pin (fig. 2D, item 54) must snap into position. 7. Allow sample to flow by opening inlet valve. 8. Fill a half capful of grit (U95 653) into the cell block. 9. Repalce cover and tighten by nut. 5.3 AMPLIFIER FOR CHLORINE MEASURING CELL DEPOLOX 4 After completion of the field the following initial startup procedure has to be followed: 1. Insert the amplifier module into the basic unit until it is firmly seated and tighten fixing screws. 2. As soon as power is on, an automatic test of the amplifier is made, which is signalled by the flashing of all display segments. 3. Check the factory-set amplifier setup against the following table. It does not meet your requirements, reprogram the setup (refer to page 17, item 6). Press the MANUAL/AUTOMATIC key scroll the parameter (P) and function (F) menus by pressing keys "P" and "F" respectively. To switch from P to F menu, press the MANUAL/AUTOMATIC key again (refer to page 34, item 11.5). 15

16 BASIC SETUP Menu Range RGE mg/l F Code 904 P Option controller set value CSP 0.45 mg/l P HI Alarm set 1.00 mg/l P LO Alarm set 0.00 mg/l P Limit time delay (Tv min.) 0.0 min P Hysteresis 0.03 mg/l P HI/LO Alarm set (switched off) P ma output signal ma P Selection cell DEPOLOX 4 P Bias volts 250 mv P Operation chlorination P A detailed description of the amplifier functions is contained in the chapter "Amplifier" (page 34, item 11.5). 16

17 6. CALIBRATION OF THE DEPOLOX 4 AMPLIFIER IMPORTANT NOTE! If the chlorination plant or the solution regulator is operated automatically, switch from the automatic to manual operation mode prior to calibration or maintenance of the DEPOLOX 4 amplifier. Press the MANUAL/AUTOMATIC key of the amplifier - "Hd." will appear in the text display line. Activate the electric positioner of the chlorinator by pressing the " " key. As the water quality at individual locations may differ considerably, the calibration of the DEPOLOX 4 analyser has to be carried out on site. As already mentioned, the unit has to operate continuously for at least 24 hours before calibration can be started. After long duration shutdowns as well as after electrode cleaning or replacement, the calibration has to be repeated and checked after 24 hours. 6.1 CALIBRATION OF RANGE The factory calibration of the measuring range is 0 to 1.00 mg/l of free chlorine. Alternative ranges (500 ppb, 1.0, 2.0, 5.0 or 99.9 mg/l) can be programmed prior to zero calibration and DPD calibration. 1. Press the MANUAL/AUTOMATIC key of the amplifier menu display then press key "F" repeatedly until "RGE" for range is displayed. 2. Press direction keys to select the range and enter the final value by pressing key "E". 6.2 CALIBRATION OF BIAS VOLTAGE The factory calibration of the bias voltage is 250 mv. For ozone measurement as well as for water, sea water or brine water, the bias voltage must be changed to 300 mv. 1. Activate manual operation mode ("Hd.") and press key "P" repeatedly until "CODE" is displayed. 2. Press direction keys to select access code "904" and enter this code (key "E"). All the following parameters can now be changed in the P menu. 3. Press key "P" until "Upot" is displayed. 4. Select the desired bias voltage by pressing the direction keys and enter the final value (key "E"). 17

18 6.3 ZERO CALIBRATION 1. Activate manual operation mode and press key "F" until "ZRO mg/l" is displayed. 2. Close shut-off valve (page 10, item 20) to shut off sample water flow and wait for 3 minutes. 3. Press key "E" to enter the zero current. 4. Open shut-off valve. 5. Press the MANUAL/AUTOMATIC key to leave the F menu. NOTE: After the sample water flow is shut off, the indication of the amplifier with drop - very fast initially then after about 1 minute more slowly. During initial startup, a waiting period of 5 minutes must be observed even if the digital display drops to 0.00 after a few seconds of flashes. The potentiostatic measuring principle allows a 2 month interval between calibrations. 6.4 ZERO CALIBRATION WITH CHLORINE-FREE WATER If chlorine-free water is available, it may be used for zero calibration. In some cases (e.g. in waterworks) chlorine-free water for zero calibration may also be obtained by turning off the chlorinator. 6.5 ZERO CALIBRATION IN CASE OF A COMBINATION OF CHLORINE AND OZONE If a combination of these two methods of treatment is used, the sample water for checking and calibrating the zero point must be taken off after the activated carbon filter of the ozonisation system. This means that there must be a second sample water take-off after the activated carbon filter of the ozonisation system in addition to the sample water take-off in the return line to the pool. Both sample water lines must be coupled by means of a three-way ball valve before the measuring cell. In this way, the sample water line can be used alternatively for measuring or zero-calibration purposes. 18

19 6.6 MEASURED VALUE CALIBRATION 1. After completing the zero calibration, open shut-off valve (page 10, item 20) and wait at least 2 minutes. 2. Activate manual operation mode and press key "F" until "DPD mg/l" is displayed. 3. Take a sample from the drain hose and determine the content of free chlorine, chlorine dioxide or ozone by means of the DPD method (colorimetre or photometer). 4. Press direction keys until the determined value is displayed on the LED display. 5. Enter this value into the amplifier memory by pressing key "E". The measuring cell is now calibrated. 6. Leave the F menu and return to manual operation mode by pressing MANUAL/AUTOMATIC key. Press this key again to switch to automatic operation of the amplifier. The controller outputs (optional) are now activated. 6.7 CHEMICAL ANALYSING METHODS The chemical determination of chlorine residual or other oxidising agents may be performed conveniently by using either a colorimeter or a photometer. Both instruments furnish precise values and are easy to handle. For chlorine and ozon measurements, DPD tablets or DPD liquid have to be added to the water sample. The water colour is subsequently checked against a colour chart or in the photometer (refer to the respective instruction manuals). To keep the measuring error as small as possible, compute the average of 3 consecutive samples. 19

20 7. MAINTENANCE 7.1 ZERO POINT AND MEASURED VALUE CHECK After initial setup, the zero point and measured value should be checked periodically: 1. Daily check of measured value with DPD method. 2. Routine check of zero point (after 1 or 2 weeks). 3. "Check after 24 hours" following electrode cleaning or replacement and/or following replacement of grit. 7.2 SERVICING OF THE REFERENCE ELECTRODE The silver/silverchloride reference electrode (BZ-1150/2-5/E, item 3) is screwed into an electrolyte receptacle filled with electrolyte gel. Replenish the electrolyte as soon as the electrolyte level has dropped to the sample water level in the flow-through assembly (electrolyte U ). A visual check is necessary only every 2 months. In cases where the DEPOLOX 4 is used for water having a temperature above 35 C (Hot-Whirl-Pools) the electrolyte for the reference electrode has to be renewed every 4-6 months, for normal applications every 12 months. 7.3 CHANGE OF GRIT As the grains of grit (U ) used for continuous electrode cleaning wear down after a while, the grit has to be replaced every 2 months. Proceed as follows: 1. Activate manual operation mode. 2. Close shut-off valve (page 10, fig. 1, item 20) to shut off sample water flow. 3. Open drain valve (page 10, fig. 1, item 7 and BZ-1141/E, fig. 3, item 19) of the DEPOLOX 4 measuring cell by turning the knurled-head screw counterclockwise. 4. When the cell body is empty, close drain valve. 5. Unscrew PVC nut (BZ-1150/2-5/E, fig. 2A, item 46) and remove cover (BZ-1150/2-5/E page 95, fig. 2A, item 39). 6. Pull electrode assembly down and out of the cell block (BZ-1150/2-5/E, fig. 2A, item 41) and rinse measuring cell and cell block to remove grit particles. 7. Replace electrode assembly into cell block. NOTE! The keying pin must snap into position. 8. Pour half a capful of grit into the cell block. (Use cap of spare grit glass). 9. Fasten cover (BZ-1150/2-5/E, fig. 2A, item 39) with nut (BZ-1150/2-5/E, fig. 2A, item 46). 10. Open shut-off valve (page 10, fig. 1, item 20). 20

21 7.4 STRAINER The strainer (page 10, fig. 1, item 3) should be cleaned periodically depending on the local water quality. The frequency of cleaning should be determined locally as required. 7.5 ELECTRODES As grit is used for cleaning the working electrode and the counter electrode, these wear down gradually. The electrodes should be replaced every 3 or 4 years. The reference electrode and the KCL electrolyte should be replaced every year (chapter 7.2). In the case of extended shut-downs, for example during the winter season of outdoor swimming pools, the KCL electrode as well as the ph and Redox probes are to be protected against frost. The correct assignment of the measuring cables to the probes is shown on drawing BZ Refer to drawing F for correct matching of measuring cables and electrodes. 7.6 CHEMICAL AND MECHANICAL CLEANING If there is a build-up of deposits in the flow-through assembly (BZ-1150/2-5/E, item 41) or on PVC parts, they may be removed by cleaning with dilute hydrochloric acid (concentration approx. 10 %, U ). CAUTION: Do not clean the working electrode and the counter electrode chemically! The two membranes (BZ-1150/2-5/E, fig. 2B, item 7) for the reference electrode cannot be cleaned. Use a pair of pointed pincers to remove the membranes together with their PVC body by gently pulling and turning, and to replace them. Depending on the local water quality, the membranes should be replaced every 2 to 3 years. 7.7 SPARES FOR MAINTENANCE Pt working electrode, UXB Pt counter electrode, U Reference electrode, U Membrane, U l of electrolyte for reference electrode, U g of grit, U

22 8. TROUBLESHOOTING PROBLEM CAUSE REMEDY Insufficient sensitivity Insufficient water flow. Check water flow, remove any contaminants in sample water line or in measuring cell, clean strainer. Unsteady signal. Contaminated electrodes. Changed grit colour (yellow/brown). Excessive ph-value Membrane clogged. Air bubbles on inner surface of membrane. Clean electrodes. Replace grit. Adjust ph-valve. Replace membrane. Wait until running-in period of measuring cell is completed. Calibration of zero point and measuring range not possible. Excessive zero current. Measured electrode current (menu item µa electrode current) in chlorine-free water must be below ± 5 µa; otherwise verify bias voltage = 250 mv (chapter 6.2). Indicated value oscillates considerably at constant chlorine concentration. Insufficient measuring cell current. Considerable fluctuations in water pressure. Fluctuating ph-value. Inlet to cell body or flow regulator clogged. Diaphragm defective. Air bubbles. The current potential between chlorine-free and chlorinated water with 1.0 mg/l of chlorine must be at least 4 µa; contaminated electrodes or the presence of chlorisocyanurates in the water might be the cause of a lower potential. Check pressure. Clean ph electrodes. Clean inlet or flow regulator. Replace diaphram. Install vent line. 22

23 9. ph-value ANALYSER The ph-value analyser consists of a ph probe, an impedance transformer, a special cable and a plug-in amplifier. For combined chlorine and ph-value measurement, the transparent cell block of the DEPOLOX 4 chlorine measuring cell serves as flow-through assembly. If only the ph-value has to be measured, a special flow-through assembly is available. 9.1 ph-probe WITH SPECIAL CABLE The ph probe is equipped with a ceramic membrane and a silver/silver chloride reference potential. The 3.0 mol KCL gel electrolyte does not require replenishment. NOTE! Do not remove the hose from the filling hole. The ph probe is equipped with a special connector. Check that the o-ring is still on the unit prior to connection. An impedance transformer (part no. U ) has to be fastened to the ph probe, which, in turn, is plugged into the measuring cell cover. This impedance transformer is used to convert the very high ohmic signal of the ph probe (appr. 1000MOhm) into a low ohmic signal so that problems caused by dirt, moisture or electric fields around live wires can be avoided to a large extent. By virtue of the incorporated lithium battery, the impedance transformer does not have to be connected to an external power source (battery life: approx. 5 years). The max. distance is 50 m. 9.2 START-UP OF ph-value ANALYSER 1. Plug the ph probe into the DEPOLOX 4 measuring cell cover, fasten the impedance transformer to the probe and the probe cable with plug to the impedance transformer. 2. Connect the probe cable to the corresponding terminals in the basic unit. 3. Plug the ph amplifier into the basic unit and fasten it. Check the standard factory calibration of the amplifier and change the settings if necessary. Press key MANUAL/AUTOMATIC, then scroll the parameter and function menus by pressing key P and key F respectively. 23

24 BASIC SET-UP Menu Temperature 20 C F Range zero point ZRO ph 4.00 F Range final value RGE ph 9.00 F Code 904 P Setpoint (control contact) 7.00 ph P HI Alarm set 9.00 ph P LO Alarm set 4.00 ph P Direction of control "ACID" P Limit value time delay 0.00 min P Limit value hysteresis 0.03 ph P Alarm relay N.O. P ma output signal 0-20 ma P 4. Press key MANUAL/AUTOMAITC - "Man. ph" is displayed. 5. If the ph-amplifier is not fitted with an automatic temperature compensation (option Pt100), after pressing the F-key the menu "Com. C" is displayed. Prior to the calibration of zero point and slope the sample water temperature must be entered. 6. Press key "F" until "Cal. ph7" for calibration with buffer solution ph is displayed. 7. Remove ph probe from Depolox 4 cell, immerse it in ph 7 buffer solution and agitate gently. 8. As soon as the digital display has stabilized, press key "E" to enter calibration value ph 7 (display: 7.00 ph). 9. Press key "F" until "Cal. ph" is displayed. For slope calibration use either the ph 4.65 buffer solution recommended by W&T or another type of solution, e.g. ph 9 buffer solution. Rinse probe with distilled water between calibrations! 10. Immerse probe in ph 4.65 buffer solution and agitate gently. 11. As soon as the display has stabilized, select the ph value of the buffer solution (e.g. 4.65) on the display by pressing the direction keys. 12. Press key "E" to enter the slope value. 13. Replace ph probe into DEPOLOX 4 cell block. 24

25 9.3 MAINTENANCE OF ph PROBE Depending on the degree of contamination of the sample water, the ph probe has to be cleaned in regular intervals. The frequency of cleaning has to be determined empirically, but it is recommended to clean or calibrate it every 4 weeks. To prevent incorrect measurement, both the glass diaphragm and the ceramic membrane have to be cleaned. Clean the glass diaphragm mechanically with a moistened, clean and soft napkin or cotton swab. Do not clean the probes with a dry napkin or cotton swab as this method tends to produce a uniform cover of dirt on the probe surface. Remove oil or grease with acetone, denaturated alcohol or another type of solvent. After cleaning it, rinse the probe thoroughly with water. To remove calceous deposits from the glass diaphragm and the membrane, submerge the probe in hydrochloric acid of 10 % strength. Rinse thoroughly with distilled water. Probe ageing is frequently the cause of a sluggish ph-value indication or a declining slope. ph-probes have a service life of 1 to 3 years provided that they are serviced regularly. 9.4 ph MEASUREMENT USING THE PHENOL RED METHOD Checks of the ph-value by means of comparators or photometers using the phenol red method may show deviations of 0.5 ph units between the value displayed on the DEPOLOX 4 amplifier and the value obtained from the sample water discharge from the DEPOLOX 4. The cause for such a deviation is the degassing of carbonic acid in the sample water drain hose. For comparative measurements the sample water should be taken through the drain valve. Do not forget to shut the drain valve after drawing with the sample. 25

26 9.5 SPARE PARTS AND CHEMICALS FOR MAINTENANCE For the maintenance of ph probes, a complete service case is available (order no. U ). Any item in the service case may also be ordered separately. ph probe, order no. U with impedance transformer, order no. U and ph/mv cable, order no. U standard buffer solution ph 7.00, supplied in a 250 ml glass bottle order no. EXA standard buffer solution ph 4.65, supplied in a 250 ml glass bottle order no. EXB squeeze bottle made of polyethylene filled with 500 ml of distilled water, order no. U filter paper, order no. U ml of hydrochloric acid, strength 10 % supplied in a PE bottle, order no. U ml of denaturated alcohol supplied in a PE bottle, order no. U calibration beaker made of polypropylene, 100 ml, graduated, order no. P

27 10. REDOX ANALYSER The Redox analyser consists of a Redox probe, an impedance transformer, a special probe cable and a plug-in amplifier. For combined chlorine and Redox measurement, the transparent cell block of the DEPOLOX 4 chlorine measuring cell serves as flowthrough assembly. If only the Redox value has to be measured, a special flow-through assembly is available REDOX PROBE WITH SPECIAL CABLE The Redox probe is equipped with a ceramic membrane and a silver/silver chloride reference potential. The 3.0 mol KCL gel electrolyte does not require replenishment. NOTE! Do not remove the hose from the filling hole. The Redox probe is equipped with a special connector. Check that the o-ring is still on the unit prior to connection. Also with the Redox probe, an impedance transformer is used to convert the very high ohmic signal into a low ohmic signal. The supplied screened coaxial cable of 1.5 m length is equipped with a special plug on one end. Fasten this plug to the impedance transformer connector unit. The other end of the screened cable has to be connected directly to the corresponding terminal in the basic unit. The max. distance is 50 m START-UP The start-up procedure for the Redox analyser is the same as that for the ph-value analyser. A solution that generates 468mV (Pt Ag/AgCl, 3 mol KCL, E ) serves as buffer solution. Immerse the probe in this solution and wait for 10 minutes. Activate manual operation mode, press key "F" until "Cal. mv" is displayed and select the buffer solution value by pressing the direction keys. Press key "E" to enter this value (max. ± 50 mv). The Redox probe is now calibrated. The factory settings are similar to those in the ph amplifier, the factory-set measuring range is mv. NOTE: The running-in of a Redox probe takes several hours. This factor has to be taken into consideration to achieve a correct Redox measurement. 27

28 Basic set-up (Redox amplifier without PID controller) MENU Range zero point ZRO 400 mv F Range final value RGE 900 mv F Code 904 P Setpoint (control contact) 700 mv P Control direction INCR. P HI alarm set 900 mv P LO alarm set 400 mv P Limit value time delay 0.00 min P Hysteresis 3 mv P Alarm relay N.O. P ma output signal 0-20 ma P 10.3 MAINTENANCE OF THE REDOX PROBE Depending on the degree of contamination of the sample water, the Redox probe should be cleaned in regular intervals (see maintenance of ph probe). A contaminated probe will respond sluggishly as indicated by an almost straight line on the recorder tape. Often the indicated Redox potential is too low. Usually the surface of the platinum electrode is gradually covered up by a layer of contaminants which may not be visible. The ceramic membrane may also be contaminated or scaled by calceous deposits. Remove the Redox probe from the flow-through assembly and clean the platinum electrode with water and some fine abrasive household cleaning powder. Take a bit of cleaning powder and rub the platinum electrode between your finger tips until it becomes shiny. Rinse thorougly with water and replace the probe without touching the platinum electrode. After a running-in period of 3 to 4 hours, the probe will again be ready for operation. To remove calceous deposits, immerse the probe for a few minutes in hydrochloric acid (strength 10 %) just beyond the membrane. Rinse thoroughly with water. Remove oil and grease with denaturated alcohol or acetone. Rinse probe thoroughly with water. 28

29 10.4 SPARE PARTS AND CHEMICALS FOR MAINTENANCE mv-redox probe, order no. U with impedance transformer, order no. U and ph/mv cable, order no. U Redox control solution V (for Ag/AgCl 3 mol KCL), supplied in a 250 ml glass bottle order no. E calibration beaker made of polypropylene, 100 ml, graduated, order no. P squeeze bottle made of polyethylene, filled with 500 ml of distilled water, order no. U ml of hydrochloric acid, strength 10 %, supplied in a PE bottle, order no. U ml of denaturated alcohol, supplied in a PE bottle, order no. U

30 11. AMPLIFIER 11.1 INSTALLATION Mount the basic unit (dimensions W 337 x H 223 x D 223 mm) in the 4 mounting holes. If the front door is closed, the enclosure is IP 65. A maximum of 3 plug-in amplifiers and 1 COM interface card can be plugged into the basic unit. The amplifiers can be combined in any desired way (e.g. 2 chlorine amplifiers and 1 ph amplifier). A basic unit for panel mounting of 3 amplifiers and 1 COM interface card is also available (dimensions: see drawing U , U and U ). The plug-in amplifiers (dimensions: W 76 x H 129 x D 160 mm) consist of a front panel with keypad and 2 printed circuit boards (standard European dimensions: 100 x 160 mm). As a result of the modular design, each amplifier has a separate power supply and a separate microprocessor. In the event of a failure of one measuring system, the function of the remaining amplifiers is not impaired. In this case, the unit can be repaired in a quick and inexpensive way by the customer himself as he only has to replace the defective amplifier. Loosen the 4 mounting screws and pull the amplifier out of the basic unit. The COM interface card (dimensions: W 20 x H 129 x D 160 mm) for data transmission between amplifier and a printer or a PC has to be plugged into the first receptacle on the right. Any receptacle (amplifier or interface card) not in use has to be covered with a blind. 30

31 DIMENSIONS OF BASIC UNIT, PLUG-IN AMPLIFIERS AND COM INTERFACE CARD B-74.PCX - edition 01/1993 Basic unit for wall mounting Plug-in amplifier COM-Interface card B-75.PCX - edition 01/1993 Order No. for amplifiers: refer to table BZ-1245-E. 31

32 11.2 ELECTRICAL INSTALLATION Unit for panel mounting: see W/D 30-E-7578, sheets 1 and 2. Connect the mains power supply to terminals L/N/PE for the supply of all plug-in modules. A 16 A protecting fuse for the mains power supply must be provided. The current flows via the basic unit PCB to the terminal blocks of the plug-in units. CAUTION! The terminal blocks may carry the mains voltage even after the plug-in units have been removed. The plug-type terminals in the basic unit may be removed temporarily for easier connection. On the power supply PCB, a fuse (230V, A or 115 V, 0.25 A) is provided for each plug-in amplifier. Terminals 9, 10, 11 and 12 for the connection of dosing pumps or an electric positioner can only be used if option "controller" has been selected and are protected by a fuse on the basic unit PCB (F1, F2, F3). Careful wiring by trained personnel is essential to prevent electrical destruction of the amplifier modules. Wiring diagram 30-E-7585, sheets 1-3 shows a wiring example for combined Cl 2, ph and Redox control with an electric positioner or a dosing pump. 32

33 11.3 FRONT PANEL measured value display LED s for controller output (optional) text display temperature display (optional) keypad handle with designation 4 mounting screws B-45.PCX - edition 01/1993 The front plate design is the same for all amplifiers. The front plate consists of a 3-digit 7-segment LED measured-value display, a text display (5 x 7 dot matrix) and a keypad with 6 keys. If the options "controller" and "temperature" have been selected, additional LED s show the direction of rotation of the controller output (increasing and decreasing feed rate of electric positioner) and the temperature of the sample water in C. Texts can be displayed in 4 languages (German, English, French and Italian), which facilitates the operation of the amplifiers considerably. 33

34 11.4 KEYPAD parameter menu function menu direction keys Parameters such as limit values, ma output or, if option "controller" has been selected, controller parameters are set in the P menu. Settings such as zero point, measured value and measuring range can be set in the F menu. They are used to select values in the P or F menus and for the manual operation of controller outputs. key MANUAL/ AUTOMATIC key "E" B-18.PCX - edition 01/1993 Activates manual operation mode required for selection of values in the P or F menus. If settings in the P or F menus are changed (e.g. limit value increased from 0.30 to 0.35 mg/l), the selected value has to be entered by pressing key "E" PARAMETER AND FUNCTION MENUS - SET-UP AND CHANGING OF SETTINGS 1) Press key "Hd." is displayed in the text display, MANUAL/AUTOMATIC: manual operation mode of ampflifier is activated. 2) Press keys "P" or "F": The respective menus are displayed in the text display. Press key again to scroll menu. 3) Press direction keys: Values to be changed can be selected. 4) Press key "E": The selected value is entered. 5) Press key Return from F or P menus to manual MANUAL/AUTOMATIC: operation mode. 34

35 11.6 BASIC AMPLIFIER SET-UP The German set of characters is used as standard in the matrix text display. For changing this configuration (switch S1 on processor PCB), the amplifier has to be removed from the basic unit. Use switches 1 and 2 to select the language and switch 3 to activate option "temperature" (temperature measurement with Pt 100). Together with the COM interface card, switch 4 is used to set date and time. Switches 5 and 6 serve internal servicing purposes. Switch no. 5 is used to unlock the positioner's feedback signal for the Cl 2 amplifier. Switch no. 6 serves internal servicing (Reset). (See chapter 15, page 50.) B-22.PCX - edition 01/1993 Switch M1 number 1 Switch M1 number 2 Switch M1 number 3 Switch M1 number 4 Switch M1 number 5 Switch M1 number 6 German English French Italian OFF OFF ON: OFF: ON: OFF: ON: OFF: ON OFF OFF ON ON ON Option Pt 100 temp. measurement acitvated Option Pt 100 temp. measurement inactivated Date-time can be selected (COM-interface) Date-time selection locked Positioner feedback for Cl2 module No positioner feedback Reset (see chapter 15; error message; System? or ADU?) The basic set-up (factory-set) of the parameter and function menus for chlorine, ph-value and Redox measurement amplifiers is described on pages 15, 23 and 27 respectively. 35

36 12. CHLORINE MEASUREMENT AMPLIFIER 12.1 PARAMETER MENUS (STANDARD CL 2 AMPLIFIER) TEXT DISPLAY DESCRIPTION POSSIBLE SETTINGS CODE SP = mg/l Al Al = mg/l = mg/l Prevention of unauthorized access to following menus. Desired value displayed only if option "controller" has been selected. HI Alarm LO Alarm Access code: 904 Ald (min) Limit time delay min. Alh (min) Al N.O ma Limit hysteresis Alarm relay condition Selection of ma output All settings in the selected measuring range (F menu). Settings between limit value min and end of measuring range. Settings between 0.00 and limit value max. Settings between digits of display N.O. = normally open N.C. = normally closed --- switched off / / / ma --- switched off DEPOLOX 4 Selection cell Depolox 3, Depolox 4 Upot Bias voltage 50 mv mv CHLOR EL. POS. Direction of contact Control element selection menu Chlorination Dechlorination EL. POS. - M. Pump - SOL. Pump - CONT. - Electric positioner Metering pump Solenoid pump Continuous output NOTE: For the Cl 2 -amplifier the option "Controller" may be ordered. For this option the extended parameter menus are valid. 36

37 EXTENDED PARAMETER MENU (Cl 2 AMPLIFIER WITH CONTROLLER) Selected control element: electric positioner or motorized valve (3-point step controller) Ym (%) Tuning of feedback signal Automatic tuning of the feedback signal and measurement of Ty Xp (%) Controller parameter Prop. band % Ty (sec) Running time of electric Running time sec. positioner Tn (min) Controller parameter Integral action time min Selected control element: metering pump (pulse duration control) Xp (%) Controller parameter Prop. band % Tp (s) Controller parameter Controller on-time + off-time = cycle sec. Ymin (%) Controller parameter % basic load Ymax (%) Controller parameter Controller output limit Ymin % Tn (min) Controller parameter Integral action time min. Selected control element: solenoid pump or continuous controller output (pulse frequency controller) Xp (%) Controller parameter Prop. band % Ymin (%) Controller parameter % basic load Ymax (%) Controller parameter Controller output limit Ymin % Tn (min) Controller parameter Integral action time min. 37

38 12.2 FUNCTION MENUS (CL 2 AMPLIFIER) TEST DISPLAY DESCRIPTION POSSIBLE SETTING ZRO mg/l Zero calibration Sets zero point at 0.00 mg/l DPD mg/l Measured value calibration Sets value determined by DPD method RGE mg/l Selection measuring range 1.00 / 2.00 / 5.00 / 9.99 mg/l 500 ppb ± µa Display of cell current in µa µa DAY MONTH YEAR HOUR MINUTE Parameters for COM-interface (realtime clock) switch S1-4 (refer to chapter 11.6) PARAMETER SET-UP DURING INITIAL OPERATION NOTE: The following settings are reference values for the initial operation of a Cl 2 residual control system. The quality of regulation may be optimized by the user himself with the help of a recorder. It is essential to change only one controller parameter at a time and to check the result after 2 to 3 days on the recorder tape. It is recommended to change the prop. band Xp first and then the D-factor. It is advisable to write the optimal user-specific values in the parameter and function menus into the provided sticker in the terminal cover. By measuring the dead times using a stop watch it is also possible to have the controller parameters calculated automatically by the amplifier-controller (autoadaptation). 38

39 CONTROL ELEMENT ELECTRIC POSITIONER OR REGULATING VALVE Swimming pool water: Controller Children s pool Swimmers pool Swimmers pool parameter Indoor bath Indoor bath Outdoor bath Volume 90 m 3 Volume 900 m 3 Volume 175 m 3 Dead time 10 min Dead time 12 min Dead time 3 min (vertical throughflow) Raise time: Raise time: Raise time: 40 min 280 min 40 min Cl 2 feed rate Cl 2 feed rate Cl 2 feed rate max. 100 g/h max. 450 g/h max. 900 g/h SP 0.50 mg/l 0.45 mg/l 0.40 mg/l Xp 75 % 12 % 22 % Tn 64 min 52 min 14 min Controller Potable water parameter SP 0.2 mg/l Xp 100 % Tn Ty 2 min 180 sec. 39

40 CONTROL ELEMENT METERING PUMP, SOLENOID PUMP, CONTINUOUS OUTPUT Controller Indoor bath swimming pool 100 m 3 parameter Cl 2 feed rate D10-10 l/h SP 0.50 mg/l Xp 10 % Tp* 60 sec Ymin 0 % Ymax 100 % Tn 20 min * Recommended Tp time for metering pumps Metering pump (storkes/min) Tp (s) NOTE: Tp menu is not available when solenoid pump or continuous output are used as control element. 40

41

42 ADJUSTMENT OF THE FEEDBACK DISPLAY In order to compensater for tolerances and possible limitations of the electric positioner the feedback display must be tuned. Preconditions: - Electric positioner is in the AUTO position (handwheel engaged). - Running time of electric positioner sec. - Electric interlocks of positioner must be inactivated. - Correct electric connection between positioner and amplifier. Adjustment: - Select P menu "Ymin (%)". - Press key E. - Now the automatic adjustment of the feedback display is made. This can be seen on the status display 1 till 6: Ym (%) 1 activation Ym (%) 2 0 % approach Ym (%) 3 0 % tuning Ym (%) % approach Ym (%) % tuning Ym (%) 6 calculation of positioner running time Ty - The tuning process is finished when the status display "Ym (%)" extinguishes. Tuning tolerances: The feedback signal is adjustable by max. 30 % at the zero (Y 0 %) and range (Y 100 %) values. Example 1 (potentiometer feedback): Potentiometer 100 Ohm: max. range Ohm min. range Ohm For feedback signals potentiometers in the range between 100 Ohm and 10 kohm can be used. Example 2 (ma feedback): max. range ma min. range ma The ohmic load is 12 Ohm. 42

43 13. ph MEASUREMENT AMPLIFIER 13.1 PARAMETER MENU (STANDARD ph AMPLIFIER) TEXT DISPLAY DESCRIPTION POSSIBLE SETTINGS CODE Prevention of unauthorized access to following menus Access code: 904 SP ph Desired value (contact) All settings in the selected measuring range (F-menu) Al = ph HI alarm Settings from limit value min to top value of measuring range Al = ph LO alarm Settings from bottom value of measuring range to limit value max Ald ph Limit time delay min Alh ph Limit hysteresis digit of display Al N.O. Alarm relay N.O. = normally open N.C. = normally closed --- switched off ma Selection of ma output / / / ma --- switched off ACID Direction of control Acid, alkaline M. Pump Control element selection menu Solenoid pump, continuous output, electric positioner, metering pump NOTE: For ph-amplifier the option "Controller" may be ordered. For this option the following parameter menus are valid. 43

44 EXTENDED PARAMETER MENU (ph AMPLIFIER WITH CONTROLLER) Control element: electric positioner or motorised valve (3-point step controller) Xp (%) Control parameter Prop. band % Ty (sec) Running time of electric Running time sec positioner Tn (min) Control parameter Integral action time min Control element: metering pump (pulse duration control) Xp (%) Control parameter Prop. band % Tp (s) Control parameter Controller on-time + off-time (cycle) sec Ymin (%) Control parameter % basic load Ymax (%) Control parameter Controller output limit Ymin % Tn (min) Control parameter Integral action time min Control element: Solenoid pump or continuous controller otuput (pulse frequency controller) Xp (%) Control parameter Prop. band % Ymin (%) Control parameter % basic load Ymax (%) Control parameter Controller output limit Ymin % Tn (min) Control parameter Integral action time min 44

45 13.2 FUNCTION MENU (ph-amplifier) TEXT DESCRIPTION POSSIBLE SETTINGS DISPLAY COMP C Internal temperature C compensation (An external Pt 100 sensor ( C) can be connected as an option.) CAL ph 7 ph 7.0 calibration Calibration only with buffer (zero point) solution ph 7.0. CAL ph ph calibration (slope) Any buffer solution, e.g. ph 4.65 or 9, can be used. ZRO ph Bottom value of ph measuring range RGE ph Top value of measuring ph range mv Display of probe voltage ± 500 mv DAY Parameters for COM MONTH interface (realtime clock), YEAR switch S1-4 (chapter 11.6) HOUR MINUTE * COMP C is not displayed if the ph measurement amplifier is equipped with option "Pt 100". In this case the external temperature signal of C is used. 45

46 13.3 SET-UP OF CONTROL PARAMETERS FOR INITIAL OPERATI- ON (PARAMETER MENU) FOR METERING PUMPS (PULSE DURATION OR CONTINUOUS CONTROLLER) SP = ph 7.20 Setpoint Xp = 10 % Control amplification (factor 10) Tp = 60 s Pump cycle (ON + OFF time) Ymin = 0 % No basic load Ymax = 100 % No max. feedrate limit Tn = 20 min Integral action time FOR SOLENOID PUMPS (PULSE FREQUENCY CONTROLLER) SP = ph 7.20 Setpoint Xp = 10 % Control amplification (factor 10) Ymin = 0 % No basic load Ymax = 100 % No max. feedrate limit Tn = 20 min Integral action time FOR ELECTRIC POSITIONERS AND REGULATION VALUES (STEP RATE CONTROLLER) W = ph 7.20 Setpoint Xp = 10 % Control amplification (factor 10) Ymax = 100 % No reduction of the positioning speed Tn = 20 min Integral action time For all types of controllers the direction of control (ACID or ALKALINE) must be selected. In the case of acid dosing (decreasing the ph 9) "ACID" must be selected. 46

47 14. REDOX MEASUREMENT AMPLIFIER 14.1 PARAMETER MENU (STANDARD REDOX AMPLIFIER) TEXT DESCRIPTION POSSIBLE SETTINGS DISPLAY CODE Prevention of unauthorized Acces code 904 access to following menus SP = mv Setpoint (contact) All values in the selected range (F menu) Al = mv HI alarm Settings from limit value min to top value of measuring range Al = mv LO alarm Settings from bottom value of measuring range to limit value max Ald (min) Limit time delay min Alh mv Limit hysteresis for metering digits of display and alarm contact Al N.O. Alarm relay N.O. = normally open N.C. = normally closed --- switched off 0-20 ma Selection of ma output /4...20/0...5/ ma --- switched off INCREASE/ Direction of control Control upwards or DECREASE downwards M. PUMP Control element selection menu Solenoid pump, continuous output, electric positioner, metering pump NOTE: For Redox-amplifier the option "Controller" may be ordered. For this option the following parameter menus are valid. 47

48 EXTENDED PARAMETER MENU (REDOX AMPLIFIER WITH CONTROLLER) Control element: electric positioner or motorised valve (Redox amplifier with controller) Xp (%) Control parameter Prop. band % Ty (sec) Running time of electric Running time sec positioner Tn (min) Control parameter Integral action time min Control element: metering pump (pulse duration control) Xp (%) Control parameter Prop. band % Tp (s) Control parameter Controller on-time + off-time (cycle) sec Ymin (%) Control parameter % basic load Ymax (%) Control parameter Controller output limit Ymin % Tn (min) Control parameter Integral action time min Control element: Solenoid pump or continuous controller otuput (pulse frequency controller) Xp (%) Control parameter Prop. band % Ymin (%) Control parameter % basic load Ymax (%) Control parameter Controller output limit Ymin % Tn (min) Control parameter Integral action time min 48

49 14.2 FUNCTION MENU (REDOX-AMPLIFIER) Text Description Possible settings display CAL. mv Electrode calibration Use Redox buffer solution (468 mv) ZRO mv Bottom value of measuring mv range RGE mv Top value of measuring mv range mv Display of probe voltage ± 500 mv DAY Parameters for COM interface MONTH (realtime clock), switch S YEAR (refer to chapter 11.6) HOUR MINUTE

50 15. ERROR MESSAGES The following table shows and explains all the possible fault messages which may appear on the dot-matrix display. If several erros occur at the same time, the error messages are displayed successively and repeated cyclically. Once the fault has been cured, the measuring system automatically erases the message from the dispaly. ERROR MESSAGE CAUSE REMEDY Flashing display Measured value outside Select bigger range. measured value measuring range. Check calibration. "mg/l", "ph" or "mv" *ZRO? Wrong connection of Check connection cables measuring cell cable/max. and measuring cell current. zero point compensation (Data sheet BZ-1145) exceeded (± 5 µa for Depolox 4 and > µa for Depolox 3 systems). *DPD? Slope error in chlorine Check measuring cell; measurement amplifier. clean electrodes; The difference between zero replace electrolyte; current and measured value check ph value of sample is below 4 µa (min. value water (< ph 8?); required for slope calibration check presence of of full range). chlorisocyanurates (Cl 2 The max. current of 100 µa stabilizer) in sample water. for Depolox 3 and 200 µa for Depolox 4 is exceeded. *CAL.? In the ph amplifier, the Check electrode, tolerance of ± 100 mv was impedance transformer, exceeded during ph 7.0 measuring cable and buffer calibration (intersection of solution (use fresh solution!) isothermal lines) or the Replace electrodes. tolerance of ± 4mV/ ph-value was exceeded during slope calibration (e.g. with ph 4.65 buffer solution). In the Redox amplifier, the tolerance of ± 50mV was exceeded during calibration with 468 mv buffer solution. 50

51 ERROR MESSAGE CAUSE REMEDY *µa? The meausring cell current Check concentration of of DEPOLOX 3 or 4 is chlorine in sample water outside the limits of (> 10 mg/l?) - 5 µa µa Check measuring cell (short circuit) DEPOLOX 4: check bias voltage in P menu. *mv? The voltage of ph-value or Check electrode connections Redox electrode is outside (cable poles, correct the limits of ph / matching of electrodes and Redox mv amplifiers, e.g. ph electrode connected to ph amplifier). *ma? Excessive ohmic resistance. Check whether ma signal The amplifier cannot drive is required (e.g. for recorder). the impressed ma output If not, inactivate output current through the signal by selecting "- - -" connected current loop in the P menu, parameter (500 Ohm at 20 ma) selection "ma". Admissible ohmic resistance: ma Ohm Check ma-signal cable for ma Ohm discontinuities ma Ohm *CSP? Set-point error. Readjust controller set-point. After a change in the measuring range, the controller set-point is outside the selected range. *Al? Error limit value MAX Readjust alarm contacts. *Al? Error limit value MIN After a change in the measuring range, HI alarm or LO alarm contacts are outside the selected range. *OPTION? Both Pt100 and positioner Switch positions S1-3 and feedback were selected. S5 must match the built-in (Cl 2 ) invalid option selected option. (ph, mv, F - ). 51

52 ERROR MESSAGE CAUSE REMEDY *RAM? Hardware error in data Must be repaired in W&T memory. factory. *Pt 100? Cable failure or short circuit Check temperature sensor in a temperature sensor. and cable. * COM? Incorrect transmission of Value outside range. data between amplifier, PC Wrong format/time. control center and COM interface card. Time destroyed. * System? Loss of data in the The amplifier has to be or measuring amplifier. recalibrated by the * ADU? manufacturer if the error remains after the system has been "reset" as follows: B-23.PCX - edition 01/1993 B-24.PCX - edition 01/1993 settings. 1. Pull amplifier out of basic unit. 2. Set swichtes M1-6 (page 35) to position ON. 3. Insert amplifier into basic unit. "RAM" is displayed. 4. Press key "E". 5. Set swichtes S1-6 back to position OFF. 6. Customer-specific settings, e.g. alarm contacts, must be restored afresh in the P and F menus as above proudure reverts the amplifier to its basis General note: The modular design of the units makes it possible to interchange amplifiers, electrodes, cables and impedance transformers of the same type so that any source of error can be tracked down easily. 52

53 16. INTEGRAL CONTROLLER (OPTION) For the chlorine, ph and Redox analyzers the option "digital controller" is available. With this option the following positioners can be controlled: Electric positioner or regulating valve (three-step controller) Motorized metering pumps, solenoid valves (pulse duration controller) Solenoid metering pumps (pulse frequency controller) Frequency converter, thyristor controller (continuous PID controller output) The type of the positioner connected is selected by the software in the menu THREE-STEP CONTROLLER FOR SERVOMOTOR The servomotor option of the integrated controller permits chlorine regulation in conjunction with a servomotor as a positioning element. The servomotor determines the chlorine dosage quantity as a function of control deviation, as is possible for instance with chlorine gas systems V-761-GST and V-741-GST. The activation of servomotors for control valves or for the stroke adjustments of dosing pumps is also possible. The control direction is indicated by the two arrow LED s in the display field (relay activation). The following controller parameters can be set with the three-step controller: Ym (%) positioner feedback autom. adjustment (0...99%) Xp (%) proportional factor % Ty (sec.) positioner running time sec. Tn (sec.) integral action time min. The dynamic behaviour of the controller is adjustable via parameters Xp and Tn. This permits the adaptation of the controller to different control loops. In the "HAND" mode the servomotor can be operated with the arrow buttons OPEN and CLOSE. 53

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57 16.4 CONTROLLER WITH CONTINUOUS OUTPUT This controller operating as a fixed value controller with continuous output calculates in function of the measured value and the stored setpoint and the control parameters an output current proportional to feedrate. The output current can be set to be ma, ma, ma or ma. In the case of a control deviation of % the output current is 0, respectively 4 ma. For higher deviations the output current is 5, 10 or 20 ma. Typical positioners for this type of controller are metering pumps with current input, thyristor control units with DC pumps or analog control valves. The following parameters can be set with the continuous output controller: Xp (%) proportional factor % Ymin (%) basic load % Ymax (%) feedrate limit % Tn (min.) integral action time % The dynamic response of the controller is adjustable via parameters Xp and Tn. NOTE: Since each measuring amplifier has only one electrically isolated current output, the current output for analog measured value recording is not available in this mode. In this case it is only possible to record the measured value via the COM interface card. The current output signal can be controlled with the direction keys in the "HAND" mode. The display (arrow LED) of the direction of control is not activated in this case. 57

58 16.5 CONTROL PARAMETERS AND THEIR INFLUENCE ON THE CONTROL LOOP Xp proportional factor With the proportional factor the controller influence (gain) is affected by a control deviation. Gain = (1/Xp) x 100 % For example, Xp = 100 % signifies that a control deviation of 10 % (measuring range 1.0 mg/l, setpoint 0.50 mg/l, actual value 0.40 mg/l) is amplified by the factor 1. With the setting Xp = 50 % the same control deviation is amplified by the factor 2. Effect: The smaller the selection of the proportional factor Xp as a %, the greater will be the amplification of the deviation from the setpoint and the faster the attempt by the controller to correct the control deviation. The gain can be changed within limits Xp = 1% (factor 100) to Xp = 999% (factor 0.1). Tp operating cycle (only valid for metering pumps) The operating cycle Tp defines a period in seconds which is to be adjusted to the type of pump in question (see ). If an operating cycle of 30 sec. is selected, the pump starts every 30 sec. The running time duration is dependent on the control deviation and the other set parameters. The pump-on-time and pump-off-time always make the selected operating cycle Tp, in the above example, 30 sec. 58

59 Ymax feedrate limitation (only applicable for metering pumps, solenoid pumps or continuous positioners) Ymax has been defined in conjunction with the metering pump activation as the feedrate limitation. With Ymax = 100 %, the feedrate factor Y is present at the controller output. With a large control deviation the metering pump can run in continuous mode. With Ymax = 30 %, the calculated feedrate factor Y is present at the controller output, however only up to the limit of 30 % pump-on-time and 70 % pump-offtime. The control parameters correspond to an electronics dosing limit of the positioning element. Ymax can be set from 2 % to 100 % Continuous output controllers: If Ymax is set to 50 %, then the max. control signal (e.g. 20 ma) is limited to half (10 ma). Ymin feedrate basic load (only applicable for metering pumps, solenoid pumps or continuous positioners) By means of this control parameter the following control elements - metering pump - solenoid pump - continuous controller can be programmed for a basic load in the range of %. The control element will then regulate at least the basic load, independent of the controller. If the controller requires more than the basic load the feedrate can be increased up to Ymax limitation. The menus Ymin and Ymax limit the feed range! 59

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61 Control direction In conjunction with the "Controller" option, the menu item "Control direction" is interrogated in the P-menu. Available at the chlorine measuring amplifier are "Chlorine" or "Dechlorination". Possible selections at the ph measuring amplifier are "Acid" and "Alkaline". This defines the activation behaviour of the output relay for the positioning element. "Chlorine" "Dechlorinate" "Alkaline" "Acid" "Open" "Close" Control factor increases when the measured value is smaller than the setpoint. Control factor decrease when the measured value is smaller than the setpoint. Control factor increases when the measured value is smaller than the setpoint. Control factor decrease when the measured value is smaller than the setpoint. Control factor increases when the measured value is smaller than the setpoint. Control factor decreases when the measured value is smaller than the setpoint. Control deviation The control deviation (Xd in %) represents the difference between setpoint and measured value relative to the full range value. setpoint - measured value Control deviation (Xd) = x 100 % full range value Example: setpoint: measured value: full range value: 0.40 mg/l 0.30 mg/l 2.00 mg/l control deviation: + 5 % 61

62 17. ADAPTATION OF THE CHLORINE AMPLIFIER B-56.PCX - edition 01/ USE OF THE ADAPTATION The adaptation is used for the automatic determination of the reaction times of the control loop (dead time Tu and raise time Ts) respectively of the resulting controller parameters Xp and Tn. The adaptation menu is accessible by code number 900. IMPORTANT NOTE! The controller parameters determined by the adaptation must be considered as recommended values for the initial start-up! In order to obtain the best control quality the controller parameters Xp and Tn may be optimized manually. 62

63 17.2 PRECONDITIONS FOR THE ADAPTATION - Electric positioner or metering pump to be on automatic mode - Calibrated amplifier (zero and DPD value) - Dead time < 60 min. - Raise time < 480 min. (8 h) for % feed range - Decomposition time of measured chlorine residual to 20 % of measuring range < 480 min. (8 h) - Correct menu programme of: - measuring range (RGE mg/l) - direction of control (for example chlorine) - positioner (for example electric positioner) - positioner running time (Ty) The adaptation should not be started at the following operating conditions: - when high doses of fresh water have been added - when the measuring cell is not yet run in - while the pool is cleaned - while filters are back-flushed 17.3 ADAPTATION MENUS TEXT DISPLAY DESCRIPTION POSSIBLE SETTINGS Code Access to adaptation Access code for adaptation is 900 menu Chlor Direction of control Chlorination or dechlorination El. Pos. Control element Electric positioner, metering pump, solenoid pump or continuous controller * Ty (sec) Control element sec. running time Adapt Adaptation Automatic cycle for the determination of Tu, Ts, Xp and Tn Tu (min) Dead time min. Ts (min) Raise time min. * Only available when the control element is on electric positioner. 63

64 17.4 SEQUENCE OF THE ADAPTATION By selecting code No. 900 in the code menu the menus for the adaptation are made accessible. Instead of the standard P menus now the adaptation menus are displayed. The adaptation is started in the menu "Adapt" by pressing key "E". Each phase of the adaptation is displayed indicating the respective status, for example "Adapt 02". During the sequence of the adaptation the following status conditions are displayed: "Adapt 00" Activation "Adapt 01" Chlorinator feedrate 0 % or metering pump OFF "Adapt 02" Waiting period until measured value is < 0.2 of range "Adapt 03" Chlorinator feedrate 100 % or metering pump ON "Adapt 04" Waiting period until chlorinator at 100 % "Adapt 05" Activation of dead time measurement "Adapt 06" Measurement of dead time Tu "Adapt 07" Plausibility interrogation of the dead time "Adapt 08" Activation of the raise period measurement "Adapt 09" Measurement of the raise period Ts "Adapt 10" Calculation of control parameters "Adapt 11" Chlorine feedrate 0 % or metering pump OFF "Adapt 12" Waiting period until chlorinator 0 % "Adapt 13" Switching over to mode AUTOMATIC Depending on the type of positioner some of the status display may be skipped. Different periods are required to perform the individual steps. It is possible that some status displays, due to the short period required for their performance, show up very shortly or do not appear at all. The adaptation mode is also indicated via the COM-card. NOTE! Depending on the control loop the adaptation may require up to 13 hours. During this period no substantial disturbing of the control loop should take place, such as back-washing of filters or considerable variations in pool attendance. 64

65 17.5 ENDING THE ADAPTATION SEQUENCE The adaptation sequence may be stopped at any time using the MAN/AUTO key. The set parameters remain unchanged ENDING OF THE ADAPTATION WITHOUT ERROR After the loop periods (dead time Tu and raise time Ts) have been determined without an error, calculation of the control parameters Xp and Tn starts. This is indicated by display "Adapt 10". The calculated parameters are marked off (Xp between % and Tn between min.) and entered into the menu. Then the chlorinator is run to 0 % or the metering pump is switched off (display "Adapt 12"). After the adaptation has been completed the amplifier is switched to the AUTOMATIC mode. The loop periods are entered into the menus "Tu (min)" and "Ts (min)" for control. If a disturbance of the control loop takes place during the adaptation period, wrong loop takes place during the adaptation period, wrong loop periods and consequently wrong controller parameters may be determined. NOTE! Carrying out the adaptation does not influence the other control parameters Ymin, Ymax and Tp. The parameters Xp and Tn are fixed for Ymin = 0 % (no basic load of the metering pump) and Ymax (no feedrate limitation). If the plant should require a basic load Ymin or a feedrate limitation Ymax, it must be noted that this will limit the control range. This involves the risk of overchlorination (Ymin too high) or underchlorination (Ymax too much limited). The controller parameter Tp must always be adapted to the metering pump used: Pump strokes/min. <= Tp value

66 ENDING OF THE ADAPTATION WITH ERROR In case there are serious disturbances of the control loop during the adaptation period, for example filter back-washing, or if the control loop is too long, the adaptation process is stopped. Possible error conditions: - Starting value not reached After activation of the adaptation and running the chlorinator to zero or switching off the dosing pump, the amplifier waits until the measured value has dropped below the starting value (0.2 * of range). This waiting period is displayed as "Adapt 02" and must not exceed 8 hours. - Dead time too big The period of time measured between the feedrate increase of the chlorinator respectively starting of the dosing pump and the rise of the measured value must not exceed one hour. This time measurement is displayed as "Adapt 06". - Raise time too big The period of time required for increasing the measured value to 50 % of the range while the chlorinator or dosing pump are operating at 100 % capacity must not exceed 4 hours. This time measurement is displayed as "Adapt 09". If any of the above error conditions occurs, the adaptation is stopped. The amplifier is switched to the DEFAULT AUTOMATIC mode (display DFT mg/l). In this mode the amplifier reacts as in the AUTOMATIC mode, but uses the control parameters set prior to the adaptation process. This condition is also indicated via the COM-card. The DEFAULT AUTOMATIC mode can be stopped by pressing the "MAN/AUTO" key. Then the amplifier is in the MANUAL mode. 66

67 17.6 DETERMINATION OF THE CONTROLLER PARAMETERS USING Tu AND Ts If the loop periods Tu and Ts are already known or if it is impossible to determine them automatically, the manually measured loop periods may be entered into the menus "Tu (min)" and "Ts (min)". When starting Tu and Ts also the parameters Xp and Tn are calculated and entered into the menus. After this operation the amplifier is not switched automatically to the AUTOMATIC mode. NOTE! By storing Tu and Ts respectively the calculated values Xp and Tn the remaining parameters Ymin, Ymax and Tp are not influenced. The parameters Xp and Tn are fixed for Ymin = 0 % (no basic load of the dosing pump) and Ymax (no feedrate limitation). If the plan should require a basic load Ymin or a feedrate limitation Ymax, it must be noted that this will limit the control range. This involves the risk of overchlorination (Ymin too high) or underchlorination (Ymax too much limited). The controller parameter Tp must always be adapted to the dosing pump used: Pump strokes/min. <= Tp value

68 18. COM INTERFACE CARD Measuring amplifiers of the DEPOLOX 4 serie may be related to RS485-PROWAY via interface card COM485. Placing of the interface card is possible in every box of the DEPOLOX 4. It is used as an interface for 1 to 3 amplifiers. These are: - Test amplifiers for chlorine, chlorine dioxyde and ozone - Test amplifier for ph measuring - Test amplifier for redox measuring - Test amplifier for conductivity measuring - Test amplifier for fluoride measuring - Test amplifier for temparature measuring Process data like - actual feed back value - measuring range - unit of the measured value - parameters of the set points (value, hysteresis, and deceleration) - set point - measured value of the option (i.e. temparature or reply of the regulator) - operation state of the amplifier - error message and alarm message may be printed or further operated with CMS. Set point and parameters of the limit may be changed centrally with the CMS. Detailed information is given in the instruction manual BA E for the interface card COM SERVICING AND REPAIR The WALLACE & TIERNAN GmbH service department is continuously at your service for installation, commissioning, servicing and repairs. We recommend that you conclude an appropriate sevice contract with us. 68

69 20. TECHNICAL DATA 20.1 DEPOLOX 4 MEASURING CELL Measuring cell: Accuracy: Sensitivity: Repeatability: Stability: potentiostatic 3 electrode cell 0.01 mg/l ± 1 digit (2 % of full scale value) 0.01 mg/l (1 % of full scale value) 0.01 mg/l ± 1 digit (2 % of full scale value) ± 2 % of full scale value for the period of one month under favourable conditions Response time: 90 % of the change of the Cl 2 residual within 60 sec. of the entry of the sample water into the measuring cell Output signal: Dimensions: Weight: Material: Temperature range: µa current 260 W x 350 H x 160 D (mm) 3.8 kg ABS, PVC, Plexiglass C for the sample water 20.2 BASIC UNIT FOR WALL MOUNTING Dimensions: Weight: 337 W x 223 H x 228 D (mm) 2.8 kg Type of protection: IP 65 Terminal compartment connection: Enclosure: 1x PG16; 3x PG13; 4x PG11; 3x PG9; 3x PG7 plastic, ABS, light grey/dark grey, hinged front with cylinder lock 69

70 20.3 CHLORINE RESIDUAL AMPLIFIER Measuring range: ppb / / / ,99 mg/l Current inputs: µa Current output: / / / ma volt-free (500 V to earth) Load voltage 10 V Accuracy 0.2 % referred to full scale value Temperature drift 0.1 % / 10 C Ambient temperature: C Temperature compensation: Relay outputs: Power consumption: optional with PT100 sensor ( C) 2 changeover contacts 250V/1A, volt-free limit contacts 2 relay outputs 250V/1A for electric positioner or metering pump activation max. 10 VA Power supply: 230V ± 15 % / 115V ± 15 % 50/60Hz Dimensions: width: 15 TE (76 mm) height: 3 TE (129 mm) depth: 160 mm Weight: 775 g 70

71 20.4 ph MEASURING AMPLIFIER Measuring range: ph 0... ph 14 stepless adjustable bottom value ph 0... ph 5 stepless adjustable top value ph 9... ph 14 Current output: / / / ma volt-free (500 V to earth) Load voltage 10 V Prescision 0.2 % referred to full scale value Temperature drift 0.1 % / 10 C Ambient temperature: C Temperature compensation: Relay outputs: Power consumption: optional internal ( C) or external compensation using Pt 100 sensor ( C) 2 changeover contacts 250V/1A, volt-free limit contacts 2 relay outputs 250V/1A for servomotor or metering pump activation max. 10 VA Power supply: 230V ± 15 % / 115V ± 15 % 50/60Hz Dimensions: width: 15 TE (76 mm) height: 3 TE (129 mm) depth: 160 mm Weight: 775 g 71

72 20.5 REDOX MEASURING AMPLIFIER Measuring range: 0 mv mv stepless adjustable range, min. 300mV between bottom and top value Current output: / / / ma volt-free (500 V to earth) Load voltage 10 V Prescision 0.2 % referred to full scale value Temperature drift 0.1 % / 10 C Ambient temperature: C Relay outputs: Power consumption: 2 changeover contacts 250V/1A, volt-free limit contacts 2 relay outputs 250V/1A for servomotor or dosing pump activation max. 10 VA Power supply: 230V ± 15 % / 115V ± 15 % 50/60Hz Dimensions: width: 15 TE (76 mm) height: 3 TE (129 mm) depth: 160 mm Weight: 775 g 72

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