Maintenance, cleaning, disposal, and replacement
TriOxmatic
®
690
16
ba25314e05
09/2020
5.3
Changing the electrolyte and membrane cap
WTW delivers the sensor ready for operation. The electrolyte solution
and membrane cap must only be replaced if:
a calibration error occurs due to a highly contaminated
membrane
the membrane is damaged (SensLeck or SensReg message)
the electrolyte solution is depleted or the counter electrode is
poisoned (SensReg message)
after the gold working electrode and silver counter electrode have
been cleaned
NOTE
Before unscrewing the membrane cap, disconnect the sensor from the
instrument. Otherwise, undesirable electrochemical reactions can oc-
cur that may lead to the destruction of the sensor.
Changing the electrolyte
and membrane cap
CAUTION
Unscrew the membrane cap for maintenance purposes
only. After doing so, always use a new membrane cap!
1
Pull the sensor out of the sample.
2
Get rid of any coarse contamination on the sensor (e.g. brush
it off in a bucket of tap water, wash it down with a hose or wash
it off with a cloth).
3
Disconnect the sensor from the instrument.
4
Unscrew the protective hood from the sensor.
