Walchem WDS100 Instruction Manual Download Page 3 | Manualshive

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Table of Contents
1.0

Introduction ....................................................... 1

Installation ......................................................... 2

Assembling the Sensor

Flow Cell Placement

Installing Sensor into Flow Cell

Typical Installation

Optional Flow Switch Installation

Wiring Instructions

Operation ......................................................... 14

Troubleshooting ............................................. 16

The disinfectant reading is much lower than the manual

The disinfectant reading is much higher than the manual

Disinfectant Reading is Unstable

Calibration Failure

Maintenance .................................................... 19

Cleaning the Electrodes

Specifications ................................................. 21

Sensor Part Numbers ..................................... 22

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Summary of Contents for WDS100

Page 1: ...on Membrane Disinfection Sensors Instruction Manual Five Boynton Road Hopping Brook Park Holliston MA 01746 USA TEL 508 429 1110 WEB www walchem com Disinfection Sensors W A L C H E M IWAKI America In...

Page 2: ...chanical parts and electrodes from date of delivery from the factory or authorized distributor under normal use and service and otherwise when such equipment is used in accordance with instructions fu...

Page 3: ...ation 7 Wiring Instructions 7 3 0 Operation 14 Conditioning 14 Calibration 14 4 0 Troubleshooting 16 The disinfectant reading is much lower than the manual analysis 16 The disinfectant reading is much...

Page 4: ...and counter electrode are in direct contact with the measuring water The reference electrode is separated from the measuring water by a housing which contains an electrolyte Together with the electrol...

Page 5: ...le upside down until the next use Never shake the electrolyte bottle as this will introduce air bubbles that will negatively impact performance Do not touch or otherwise contaminate the electrodes For...

Page 6: ...e cable connection Sensors with optional cleaning attachment The cleaning attachment consists of a cleaning chamber and two bags of glass balls When using the cleaning attachment the minimum sample fl...

Page 7: ...d value The acrylic flow cell has a flow regulator knob on the lower left hand side The sensor should be installed in an area where there is good solution movement and where it will respond rapidly to...

Page 8: ...a sample first open the water outlet valve Then open slowly the measuring water supply valve The minimum flow rate is 45 liters hour when using the cleaning attachment 20 liters hour without The acry...

Page 9: ...6 Typical Installation...

Page 10: ...tions WebMaster 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 IN WHT IN RED 5 V BLK...

Page 11: ...8 The optional flow switch is a powered device and is wired to one of the digital inputs as follows BLK IN BLU IN BRN 12 V...

Page 12: ...ld Drain Earth Ground GRN IN WHT IN RED 5 V BLK 5 V If the required cable length exceeds the 6 meters 20 feet that is supplied wire the housing to a 190851 terminal box then use a p n 100084 cable to...

Page 13: ...V WHT 120V BLU 240V BL K 12 0V BR N 24 0V IN IN 5V 5V 5V IN IN IN DIG IN 2 DIG IN 3 IN IN DIG IN 1 IN IN IN DIG IN 4 IN IN DIG IN 5 IN IN IN DIG IN 2 DIG IN 3 IN IN DIG IN 1 IN IN IN DIG IN 4 IN IN DI...

Page 14: ...9 10 11 12 13 14 15 16 17 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 TB1 TB4 TB6 TB5 TB7 N N N N N N R1 R2 R3 R4 R5 R6 POWER SWITCH FUSE IN WHT IN GRN...

Page 15: ...P DIS 1 XMT XMT USE FOR INPUT SIGNAL 2 XMT 3 X SHLD 4 5V 5 RCV 6 RCV 7 RCV IN 8 5V 9 TEMP TEMP TEMP TEMP 10 TEMP TEMP TEMP TEMP 11 IN 12 SHIELD SHIELD SHIELD TB2 FUNCTION 1 4 20 OUT 2 4 20 OUT 3 SHIEL...

Page 16: ...13 W900...

Page 17: ...n 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 The following conditioning times are recommend...

Page 18: ...he sensor has equilibrated to the temperature of the water for the zero calibration or the sample for the 1 point process calibration Zero Calibration 1 Remove the sensor from the flow cell and place...

Page 19: ...removed Remove protection cap Dirty electrodes Clean electrodes with emery paper Replace balls in cleaning attachment No electrolyte fill solution in electrolyte housing Fill electrolyte housing with...

Page 20: ...rform a self test If this passes then the problem is with the sensor or its wiring If it fails then disconnect the sensor from the circuit board and try the self test again If it still fails replace t...

Page 21: ...calibration Insufficient sample flow Increase flow rate to between 20 and 100 liters per hour Air bubbles in sample Dislodge bubbles Adjust flow rate higher if necessary Allow sample to outgas Loose e...

Page 22: ...electrodes Do NOT move the emery paper from one electrode to the other Then put the sensor into operation again If the sensor still displays unstable or too low values the electrolyte has to be chang...

Page 23: ...the sensor unscrew the electrolyte housing Rinse the electrolyte housing and the electrode finger in clean water and dry in a dust free location Replace the protective cap onto the electrolyte housing...

Page 24: ...nse time 30 seconds Conditioning time 1 hour 2 days depending on water quality Operating Pressure 0 8 bar 0 116 psi 104033 flow cell 0 4 bar 0 58 psi 192011 flow cell Operating Temperature 0 50 C 0 70...

Page 25: ...RANE 20 PPM 104037 104039 SENSOR Cl2 PEEK NON MEMBRANE 20 PPM 104030 SENSOR ClO2 PVC NON MEMBRANE 20 PPM 104038 SENSOR ClO2 PEEK NON MEMBRANE 20 PPM 103939 FIVE BOYNTON ROAD HOPPING BROOK PARK HOLLIST...

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