Walchem WebMaster, Инструкция по эксплуатации

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Disinfection Sensor Calibration Failure
This error message occurs after calibrating the chlorine or chlorine dioxide electrode. 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 calculated in the One Point Process Calibration is outside
of the range -10 to -100 mV per ppm.
Possible Causes Corrective Actions
Insufficient conditioning Wait for the appropriate amount of time before
attempting a calibration.
Insufficient sample flow
Increase flow rate to between 30 and 100 liters
per hour
Dirty electrode.
Clean electrode and recalibrate as described in
Section 7.6 above.
Air bubbles on membrane
Dislodge bubbles. Adjust flow rate higher if
necessary.
Faulty membrane.
Replace membrane
High Pressure
Reduce pressure to below 1 atmosphere and
refill cap with electrolyte
No electrolyte fill solution in membrane cap
Fill membrane cap with electrolyte. Replace
membrane cap if it will not hold solution.
Faulty analysis equipment or reagents
Consult test equipment instructions
Sensor cable disconnected.
Reconnect cable. Make sure that the +/- 5
VDC and the IN-, IN+ wires are firmly
attached.
Faulty core interface circuit board
Go to the Sensor Input Page and perform a self
(if Sensor 1). 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.
Faulty sensor option circuit board
Troubleshoot as above. Replace the sensor
(if Sensors 2-4). option board if self test fails.