Instruction Manual

Maintenance, cleaning, replacement ConOx
36
5.3 DO module: Changing the electrolyte solution and
membrane cap
Caution
Before starting to work with the sensor, please note the GENERAL
MAINTENANCE INSTRUCTIONS on page 34.
General
information
WTW delivers the DO module ready to use (see section 3). The electrolyte
solution and the membrane cap must only be replaced if:
l a calibration error occurs and the membrane is heavily contaminated
l the membrane is damaged
l the electrolyte solution is exhausted.
Changing the electrolyte solution and membrane cap
Unscrew the membrane cap.
Caution:
Electrolyte solution!
For disposal of the membrane
cap and electrolyte solution,
see section 5.7.
Rinse the sensor head with
deionized water.
Carefully rub and dry the
counter electrode with a lint-
free paper towel.
Immerse the sensor head in-
cluding the counter electrode
in RL/G cleaning solution.
Allow to react for 1 to 3 min-
utes.
Thoroughly rinse the sensor
head with deionized water.
Water the counter electrode in
deionized water for at least
10 minutes.
RL/G H O
2