Endress+Hauser OxyMax W COS 31, Руководство по эксплуатации

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OxyMax W COS 41 6 Maintenance
Hauser 19
6.2 Regeneration
Parts of the sensor will suffer wear and tear during operation.
Suitable action can restore normal operating functionality.
This action includes:
#
Warning!
Before beginning regeneration, switch off the power supply at the transmitter.
6.2.1 Cleaning the gold cathode
The gold cathode only need be cleaned when it is visibly soiled or there is a coating of
silver on it.
To clean it, proceed as follows:
•
Unscrew the membrane cap from the membrane body.
•
Carefully clean the gold surface in two stages with the abrasive sheet (contained in
scope of supply) until the (silver) coating is fully removed. Use the green sheet first
and then the yellow sheet.
•
Clean the electrode with drinking or distilled water.
•
Fill the membrane cap with fresh electrolyte COY 3-F and screw it back onto the mem-
brane body (up to the stop).
"
Caution!
The
anode is covered with a silver bromide layer at the factory. Do not clean the anode
under any circumstances!
If the coating of the anode is removed as a result of operation, the sensor is unusable
and must be sent in for recoating. In this case, contact your E+H sales office.
Action Cause
Cleaning the gold cathode
(Chap. 6.2.1) Soiled or silver-plated gold cathode
Replacing the sealing ring
(Chap. 6.2.2) Visual damage to the sealing ring
Replacing the electrolyte
(Chap. 6.2.3) unstable or implausible measuring signal or electrolyte soiling
Replacing the membrane cap
(Chap. 6.2.4) Uncleanable membrane
Damaged membrane (hole or overstretch)