Xylem CellOx 325 Dissolved oxygen sensor - Manual (Page 10)

Maintenance, cleaning, replacement CellOx 325
26
5.4 Cleaning the electrodes
Caution
Before starting to work with the sensor, please note the G ENERAL
MAINTENANCE INSTRUCTIONS on page 23.
General
information
Cleaning is only required in cases of slopes that are too small or too large
(sensor cannot be calibrated) that cannot be resolved by changing the mem-
brane head and electrolyte solution.
Cleaning the electrodes
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. Using the rough side of the
wet SF 300 polishing strip,
polish off any contamination
from the gold working elec-
trode using light pressure.
Caution: Do not use any con-
ventional sandpaper or glass-
fiber brushes.
Rinse the sensor head with
deionized water. Wipe the counter electrode
with a lint-free paper towel
and carefully remove any
loose white deposits. Immerse the sensor head in-
cluding the counter electrode
in RL/G cleaning solution.
Allow to react for 1 to 3 min-
utes.
SF 300
RL/G