Endress+Hauser COS22D Einbauanleitung Seite 5

Oxymax COS22D
2 Maintenance of the sensor
Parts of the sensor will suffer wear and tear during operation.
Suitable action can restore normal operating functionality. This action includes:
Action
Replacing the sealing ring
Replacing the electrolyte
Replacing the membrane body
Fig. 2: Exploded view
1 Plug-in head
2 Pressure ring
3 Sensor shaft
4 O-ring 8.5 x 1.5 mm
2.1 Replacing the sealing ring
The sealing ring must be replaced if visibly damaged. For replacement, use only original sealing rings.
The following O-rings can be replaced:
• Sealing ring for shaft sleeve
• Sealing ring to process
If the sealing ring on the membrane body is damaged, you have to replace the entire membrane body.
Endress+Hauser
Cause
visual damage to a sealing ring
unstable or implausible measuring signal or electrolyte soiling
uncleanable membrane, damaged membrane (hole or overstretch)
5 Membrane body
6 Shaft cover
7 Glass body with cathode and anode
Maintenance of the sensor
8 Process sealing 10.77 x 2.62 mm
9 Process connection Pg 13.5
a0011869
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