Walchem WDS100, Instruction Manual

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17
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 WebMaster, WDIS4
Go to the Sensor Input menu and perform 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 the circuit board.
Disinfectant Reading is Unstable
Possible Causes Corrective Actions
Air bubbles on electrodes Dislodge bubbles
Adjust flow rate higher if necessary
Allow sample to outgas
Air bubbles in electrolyte Refill electrolyte housing
Pressure fluctuations in
sample
Check installation
Faulty wiring Check wiring
Faulty sensor Replace sensor