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Maintenance, cleaning, storage
Removing lime
deposits on the
membrane cap
Recommissioning
16
5.
Fill the membrane cap with fresh electrolyte solution as described in
section 3.2, screw it on the sensor shaft and make the sensor ready
for measurement.
After exchanging the electrolyte solution and/or membrane cap
the sensor has to be repolarized (see section 4.1 R
).
PERIOD
If calibration is still not possible after cleaning the measurement
electrode, change the membrane cap.
5.2
Cleaning
Remove lime deposits on the membrane cap as follows:
1.
Unscrew the membrane cap from the sensor shaft and pour away the
electrolyte solution (see section 5.1).
2.
Put the membrane cap into 10 % acetic acid for several hours.
3.
Then thoroughly rinse the membrane cap with clean water.
4.
Fill the membrane cap with fresh electrolyte solution as described in
section 3.2, screw it on the sensor shaft and make the sensor ready
for measurement.
5.3
Storage
NOTE
The sensor may only be stored in an unfilled condition.
Proceed as follows to store the sensor:
1.
Unscrew the membrane cap from the sensor shaft and pour away the
electrolyte solution (see section 5.1).
2.
Thoroughly rinse the membrane cap and electrode finger with clean
water and dry them dust free.
3.
Loosely screw the dry membrane cap on the sensor shaft. The mem-
brane disk must not touch the electrode finger.
For recommissioning, clean the electrode tip with the polishing strip and use
a new membrane cap (see section 5.1). The membrane cap can be put into
10 % acetic acid for some hours to remove any lime deposits (see
section 5.2).
FCML 412 N(-S), FCML 412-M12
-
UN
ba77197e02
IN
01/2024
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