Related Manuals for Walchem WDS600
Summary of Contents for Walchem WDS600
- Page 1 W A L C H E M IWAKI America Inc. Disinfection Sensors Non-Membrane Disinfection Sensors Instruction Manual Five Boynton Road Hopping Brook Park Holliston, MA 01746 USA TEL: 508-429-1110 WEB: www.walchem.com...
- Page 2 WALCHEM and for the purposes disclosed in writing at the time of purchase, if any. WALCHEM’s liability under this warranty shall be limited to replacement or repair, F.O.B.
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Page 3: Table Of Contents
Table of Contents 1.0 Introduction ............1 Sensor Flow Cell 2.0 Installation ............2 Assembling the Sensor Flow Cell Placement Installing Sensor into Flow Cell Sensor Parts Typical Installation Optional Flow Switch Installation Wiring Instructions 3.0 Operation ............14 Conditioning Calibration 4.0 Troubleshooting .......... -
Page 4: Introduction
1.0 Introduction The Walchem non-membrane chlorine and chlorine dioxide sensors consist of an amperometric sensor assembly, cable and a flow cell. Assembly of these parts is required, so please read these instructions carefully. The sensor is capable of measuring the disinfectant in drinking water or drinking water quality water. -
Page 5: Installation
2.0 Installation Assembling the Sensor CAUTION: Wear gloves and safety glasses during assembly of the sensor since the electrolyte is a diluted acid. It is recommended to perform this operation over a sink with running water available. Please heed the warnings on the electrolyte bottle. Do not swallow the electrolyte. - Page 6 3. SLOWLY screw on the housing until it is hand tight. Be prepared for some electrolyte solution to squeeze out. 4. Rinse your hands, the sensor, and all surfaces contaminated with electrolyte solution with running water. Check the sensor for leaks. 5.
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Page 7: Flow Cell Placement
Flow Cell Placement Instructions for mounting the sensor into the process can vary greatly with the circumstances that are encountered in your application. Here are some general guidelines to assist you. Refer also to the typical installation drawings. The flow cell should be placed on the discharge side of a circulation pump or downhill from a gravity feed. -
Page 8: Sensor Parts
and/or cleaning attachment). Make sure that the large black o-ring is located between the o-ring holder and the flow cell, as shown below. Push the 1 ¼” fitting over the sensor and fasten it tightly. Make sure that the sensor is tightly fastened in place, otherwise it may be pushed out of the flow cell when it is under pressure, or leaks can occur. -
Page 9: Typical Installation
Typical Installation... -
Page 10: Optional Flow Switch Installation
Optional Flow Switch Installation Unscrew the plug at the bottom of the acrylic flow cell and insert the red float, notched end up. Then screw the flow switch into the cavity on the left side of the flow cell. Wiring Instructions WebMaster The sensor is provided with a 2-twisted pair, shielded, 24 AWG, 35 pF/foot capacitance cable. - Page 11 The optional flow switch is a powered device and is wired to one of the digital inputs as follows: BLK: BLU: BRN: 12 V...
- Page 12 WDIS410 or WDS100 or WDS600 or W900 The sensor is provided with a 2-twisted pair, shielded, 24 AWG, 35 pF/foot capacitance cable. The wiring to the controller is as follows: Shield Drain: Earth Ground GRN: WHT: RED: +5 V BLK:...
- Page 13 WDIS410 BLEED FEED BOI 1 BIO 2 ALARM N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. N.C. N.O. L2/N GROUND STUD L1 L2/N DIG IN 2 DIG IN 3 DIG IN 4 DIG IN 5 DIG IN 1 IN+ IN- IN+ IN- IN+ IN-...
- Page 14 WDS600 POWER SWITCH FUSE pH/ORP IN– R-SHLD SHIELD X-SHLD SHIELD SHIELD -5V BLK SENSOR LABEL TB1 or 2...
- Page 15 WDSW100 POWER SWITCH POWER FUSE – SW ITCH pH/ORP pH/ORP ECOND CCOND FUNCTION w/BNC XMT+ 4-20 OUT– XMT– 4-20 OUT+ SHIELD X-SHLD SHIELD SHIELD SHIELD SHIELD DIG IN 2– RCV– DIG IN 2+ RCV+ +9 VDC INPUT SHIELD SIGNAL –5V DIG IN 1–...
- Page 16 W900...
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Page 17: Operation
REMOVE? The W600 series wiring is shown below for reference. 3.0 Operation This section describes how to prepare the sensor for use. Conditioning The sensor requires conditioning to acclimate the electrodes prior to generating stable readings. Conditioning consists of installing the sensor in the flow cell, ensuring that the sensor remains wet at all times with water containing the disinfectant to be measured, and supplying power to the sensor. - Page 18 3. The coating or abrasive nature of the application. 4. The stability of the sensor and controller as a system. The frequency of calibration is really determined by experience. At a new installation, calibration might initially be checked every day by comparing the controller reading to a DPD test or other manual analysis and logging the results.
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Page 19: Troubleshooting
NOTE: Disinfectant concentration can change rapidly in the sample! Minimize the time between performing the DPD test or manual analysis and finishing the calibration! 4.0 Troubleshooting The disinfectant reading is much lower than the manual analysis Possible Causes Corrective Actions Insufficient conditioning Wait for the appropriate amount of time before attempting a calibration... -
Page 20: Sensor Error
Sensor Error This error message appears if the signal from the sensor is outside the range of –1400 to 1400 mVDC (WebMaster) or –2000 to 2000 (WDIS) or -2560 to 60 mV (W100/W600/900) Possible Causes Corrective Actions Faulty wiring Check wiring Faulty sensor Replace sensor Faulty controller sensor input... -
Page 21: Calibration Failure
Calibration Failure For WebMaster The controller will display a calibration failure if the offset calculated in the Zero Calibration is outside of the range –20 to 40 mV or the slope (mV/ppm) calculated in the One Point Process Calibration is outside of the range of the nominal mV per 0.1 to 2.0 ppm. -
Page 22: Maintenance
5.0 Maintenance The sections below describes normal maintenance. See section 4.0 Troubleshooting for assistance in determining when maintenance may be required. Cleaning the Electrodes It is recommended to clean the electrodes every 4 – 12 weeks or sooner if calibration is impossible due to unstable or low values are displayed. Remove the sensor from the flow cell by first closing the water supply valve, then the water discharge valve, then unscrewing the 1 ¼”... - Page 23 heed the warnings on the electrolyte bottle. Do not swallow the electrolyte. Avoid contact of the electrolyte with skin and eyes. Otherwise wash with a lot of water. In case of eye inflammation, contact a doctor. To store the sensor unscrew the electrolyte housing. Rinse the electrolyte housing and the electrode finger in clean water and dry in a dust-free location.
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Page 24: Specifications
±5 VDC, 5 mA requirements Signal 0 to -2000 mV DC Maximum cable 30 meters (100 feet) length Extension cable 4 conductor 24 AWG shielded (Walchem 100084) Materials of construction Sensor PVC-U PEEK PVC-U PEEK Flow cell PMMA and Natural PVDF (104033) or PVC (192011) -
Page 25: Sensor Part Numbers
SENSOR, Cl2, PEEK, NON MEMBRANE, 20 PPM 104030 104039 SENSOR, ClO2, PVC, NON MEMBRANE, 20 PPM 104038 SENSOR, ClO2, PEEK, NON MEMBRANE, 20 PPM 103939 FIVE BOYNTON ROAD HOPPING BROOK PARK HOLLISTON, MA 01746 USA TEL: 508-429-1110 FAX: 508-429-7433 Web: www.walchem.com...