Troubleshooting / Maintenance - ProMinent DULCOTEST CLE 3.1-mA Instrucciones De Servicio

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 Maintenance
Service intervals Daily/weekly depending upon application.
Maintenance tasks
S Check the sensor display value on the controller using an appropriate
chlorine measuring system (e.g. DPD-1).
S If necessary recalibrate the sensor (see 7.2 "Calibration").
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:
S Rinse the membrane under a gentle stream of cold tap water.
Removing deposits (scale, rust):
S Disassemble the membrane cap (see 11 "Decommissioning").
S Place the membrane cap in a bath of 5 % salt water (e.g. overnight).
S Rinse the membrane cap under plenty of water.
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
IMPORTANT
 The sensor must be regularly serviced in order to avoid
exceeding dosage due to sensor failure!
 Observe applicable national directives for service
intervals!
 Do not touch the sensors or bring into contact with
substances containing grease.
ProMinent ®