Endress+Hauser COS22D Einbauanleitung Seite 7

Oxymax COS22D
Installing the new membrane body
1. Fill fresh electrolyte from the supply bottle into a new membrane body.
2. Remove all air bubbles from the electrolyte by tapping the side of the membrane body (using a pen
or pencil, for example).
3. Hold the sensor vertically and carefully push the membrane body, filled with electrolyte, on the
glass portion.
4. Carefully screw on the shaft sleeve as far as it will go.
5. Carry out a reset of the cap counter (see Liquiline Operating Instructions).
After replacing the membrane cap, the sensor must be repolarized and
recalibrated. Then insert the sensor into the medium and check that no alarm is displayed on the
transmitter.
2.3 Replacing the glass body with the cathode
NOTICE
Polishing the cathode can cause impaired function or total failure of the sensor.
► Do not clean the cathode mechanically.
If the cathode is coated, replace the glass body.
1. Hold the sensor vertically and unscrew the shaft sleeve.
2. If the membrane body remains on the glass body and not in the shaft sleeve, remove it from the
glass body.
3. Flush the glass body, along with the anode and cathode, using distilled water.
4. Pull the used glass body out of the holder.
5. Dry the inside of the electrode holder.
6. Plug a new glass body (from the membrane kit) into the holder so that it fits. Ensure that you do
not damage the electrical contact pins.
7. Fill the membrane body with electrolyte (see preceding section), then screw the shaft sleeve back
on.
Endress+Hauser
Maintenance of the sensor
7