palintest Green Drop Kit Instructions Manual page 48

4.3.6 Troubleshooting
The DO in the sample is consumed by the cathode,
it is essential that a new sample must flow past the
membrane of the probe to prevent the occurrence
of false readings. The probe uses very little oxygen
for its measurement. This enables it to function
correctly with liquid movement as low as 2 inch/sec
across membrane.
The permeability of the membrane to oxygen varies
greatly with temperature. Therefore compensation
is needed for this variation. The probe comes with
an in-built Temperature Compensation for the
membrane variation.
Any deposits on the membrane surface act as a
barrier to oxygen diffusing through the membrane,
the membrane must be cleaned at regular intervals
to assure maximum reliability.
After using the probe, rinse the probe with
deionised water and wipe it with a soft cloth or
paper to avoid any hardening of deposits if
necessary. If growth develops on the probe, use a
disinfecting chemical to clean.
Note: Wipe the membrane gently when cleaning. If the
membrane is damaged or torn, the probe will no longer
function. There are no special probe storage
requirements.