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o
Minent
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8.4.4
DULCOMETER
®
D1C Measured Variable Chlordioxid and
DULCOTEST
®
CDP Chlorine Dioxide Sensor, Maintenance
The
DULCOMETER
®
controller type D1C for the measured variable chlorine dioxide is
maintenance-free.
Sensor
IMPORTANT
The sensor must be regularly serviced in order to avoid overdosing due to sensor failure!
Observe applicable national directives for servicing intervals!
Do not touch the electrodes or bring them into contact with greasy substances!
Maintenance interval
Daily/weekly servicing intervals depending upon application.
Maintenance
Work
Check the sensor display value at the controller using an appropriate chlorine dioxide
measuring system (e.g. DPD-1).
Recalibrate the sensor if necessary.
Cleaning the Membrane
If the membrane is dirty and is preventing calibration of the sensor you can try to clean the
membrane gently.
First dismantle the sensor as described in the sensor dismantling section. Observe safety
guidelines! Removal of surface contamination.
Rinse the membrane under a gentle stream of cold water.
IMPORTANT
• Never try to clean the membrane with acids/alkalis or mechanical means (brush or
similar).
• If the sensor cannot be calibrated after membrane cleaning, the membrane cap has to
be replaced by a new one.
Replacing the Membrane
If calibration is no longer possible after cleaning the membrane, or if the membrane is damaged it
must be replaced.
At
fi rst, the old membrane cap is removed and the gel adhering to the electrodes is rinsed off
ander running water as best as possible. Remainders of the gel can be removed using a soft
paper tissue. Wipe carefully across the sensor, in particular the reference system (brown ring).
Then, fi ll a new membrane cap with gel electrolyte and screw it on (see “Mounting”).
Chlorine Dioxide Sensor CDP
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