Xylem CellOx 325 Dissolved oxygen sensor - Manual (Page 8)

Maintenance, cleaning, replacement CellOx 325
24
5.3 Changing the electrolyte and membrane head
Caution
Before starting to work with the sensor, please note the G ENERAL
MAINTENANCE INSTRUCTIONS on page 23.
General
information
WTW delivers the sensor ready to operate (see section 3). The electrolyte
solution and the membrane head 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
l
in case of a leak message by the measuring instrument.
Changing the electrolyte solution and the membrane head
Unscrew the membrane
head.
Caution: Electrolyte solution!
For disposal of the membrane
head and electrolyte solution,
see section 5.6.
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