Pr
o
Minent
®
Page 33
Free Chlorine
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.
8.1.4
DULCOMETER
®
D1C Measured Variable Chlorine and
DULCOTEST
®
CLE Chlorine Sensor, Maintenance
Controller
The
DULCOMETER
®
controller type D1C for the measured variable chlorine is maintenance-free.
Sensor
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.
Maintenance interval
Daily/weekly depending upon application
Maintenance
Work
Check the sensor display value on the controller using an appropriate chlorine measuring
system (e.g. DPD-1).
If necessary recalibrate the sensor.
Cleaning the Membrane
If it is no longer possible to calibrate the sensor you can try to clean the membrane carefully.
Firstly disassemble the sensor. Observe the safety instructions.
Loose dirt clinging to the cap:
Rinse the membrane under a gentle stream of cold tap water.
Removing deposits (scale, rust):
Disassemble the membrane cap.
Place the membrane cap in a bath of 5 % hydrochloric acid (e.g. overnight).
Rinse the membrane cap under plenty of water.
You should now refi ll the sensor with electrolyte, run in and recalibrate.
Replacing the Membrane
If the sensor fails to calibrate even after cleaning the membrane, or if the membrane is damaged,
you must replace the membrane cap.
BA_DR_002_02_09_GB_Cooling.indd 33
BA_DR_002_02_09_GB_Cooling.indd 33
24.02.2009 11:56:04 Uhr
24.02.2009 11:56:04 Uhr