Troubleshooting / Maintenance - ProMinent DULCOTEST CLE Mode D'emploi

Troubleshooting / Maintenance

Once you have tried everything, check whether the reference electrode is
brownish grey at the tip of the electrode shaft. If it is silvery white it is spent
and should be reconditioned by ProMinent.
9
IMPORTANT
• The sensor must be regularly serviced in order to avoid exceeding
• Observe applicable national directives for service intervals!
• Do not touch the sensors or bring into contact with substances
Service intervals Daily/weekly depending upon application.
Maintenance tasks
Cleaning the membrane
If it is no longer possible to calibrate the sensor you can try to clean the
membrane.
Firstly disassemble the sensor. Observe the safety instructions.
Loose dirt clinging to the cap:
Removing deposits (scale, rust):
You should now refill the membrane cap with electrolyte, run in and
recalibrate (see sections 5 "Assembly", 7.1 "Run-in period" and 7.2
"Calibration").
Replacing the membrane cap
If the sensor fails to calibrate even after cleaning the membrane, or if the
membrane is damaged, you must replace the membrane cap (see sections 5
"Assembly", 7.1 "Run-in period" and 7.2 "Calibration").
30
Maintenance
dosage due to sensor failure!
containing grease.
Check the sensor display value on the controller using an appropriate
chlorine measuring system (e.g. DPD-1).
If necessary recalibrate the sensor (see 7.2 "Calibration").
Rinse the membrane under a gentle stream of cold tap water.
Disassemble the membrane cap (see 11 "Decommissioning").
Place the membrane cap in a bath of 5 % hydrochloric acid
(e.g. overnight).
Rinse the membrane cap under plenty of water.
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ProMinent