Endress+Hauser COM280 Manuel page 28

Maintenance
Immerse the sensor head into the
cleaner solution up to, and including,
the counterelectrode for 1 to 3 min-
utes.
Remove the sensor from the water
and gently shake off drops of water.
Rinse the sensor head with plenty of
electrolyte solution.
!
Note!
• The sensor is ready for operation after approx. 30 to 50 minutes. Calibrate the sensor before
measuring.
• If measuring very low concentrations (< 0.5 %SAT), let the sensor sit overnight and calibrate
it the following morning.
• The electrolyte must be absolutely free of air bubbles for measurements under pressure.
28
Rinse the sensor head with plenty of
deionized water.
Fill a new membrane cap with elec-
trolyte solution (up to the thread).
1
Hold the sensor at an angle and screw
on the membrane cap. Excess electro-
lyte flows out of the venting area (1).
Water the counterelectrode for at
least 10 minutes (deionized water).
Remove air bubbles by gently tapping
the unit with a pencil or similar uten-
sil.
mm (inch)
Now take a look at the face of the
sensor. There should be no air bub-
bles within the dotted circle. Air bub-
bles in other areas are not a problem.
Endress+Hauser
COM280