ProMinent CTE 1-mA Instrucciones De Servicio página 42

Troubleshooting
Fault
Measured value of sensor
is arbitrary and sensor current
is greater than 20 mA**
Measured value of sensor
is not stable
* When the reference electrode turns shiny silver or white it must be regenerated.
Brown-grey or yellow green coloration is normal.
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** The DULCOMETER D1C can be used to display the sensor current when the sensor is built into the system.
For this enter the complete operating menu (see DULCOMETER
Chapter 8).
Access the "Calibrating chlorine" settings menu and only read the mA-value measured under "Zero point".
Do not finish the zero point calibration but leave the menu by pushing the branch back button.
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Possible Cause
1) Chlorine concentration exceeds
the upper limit of measuring range
2) Distance between working
electrode and membrane too great
3) Sensor defective
1) Pressure fluctuations in sampling
line
2) Reference electrode defective*
Remedy
Check the whole system, remedy
fault and then calibrate sensor
(see Chapter 8.2)
Screw the membrane cup tightly
onto the electrode shaft
Return sensor to ProMinent
Check installation position and
change the process if necessary
Return sensor to ProMinent for
regeneration
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D1C, chlorine Operating Instructions,
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ProMinent