ProMinent DULCOTEST CGE 2-4P-10 ppm, Operating Instructions Manual, Page: 29 / 68

Pr o Minent
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Troubleshooting / Maintenance
When you have tried everything: check to ensure that the ring-shaped
counter electrode at the tip of the electrode stem is not a brown/grey or
yellow/greenish colour but rather silvery white. If it is the latter, it is worn out
and can be replaced by ProMinent.
9 Maintenance
IMPORTANT
• Service the sensor regularly to avoid overdosing if it stops
working.
• Please comply with current national regulations for
maintenance periods.
• Do not touch the electrodes or allow them to come into
contact with greasy substances.
Service intervals Daily/weekly depending on application.
Maintenance work
왘
Check the sensor’s reading on the controller using an appropriate
instrument for measuring chlorine (e.g. DPD-1).
왘
If necessary, recalibrate the sensor (see chapter 7.2 ”Calibration”).
Cleaning the membrane
If the membrane is contaminated and the sensor cannot be calibrated, you
can try to clean the membrane carefully.
First dismantle the sensor. Follow the safety advice.
Remove the dirt gently:
왘
Rinse the membrane under a soft, cold jet of water.
IMPORTANT
Do not use cloths, abrasive paper, scouring agents, chemical
cleaning agents or acids!
Changing the membrane
If it is not possible to calibrate the sensor even after the membrane has been
cleaned, or if the membrane is damaged, the membrane cap must be
changed (see chapter 5 ”Assembly”, chapter 7.1 ”Run-in period” and chapter
7.2 ”Calibration”).
BA_DT_085_09_07_4spr.p65 13.09.2007, 14:18 Uhr 29