What to do if ...
42
Cause
Remedy
– Send probe to WTW
Cause
Remedy
– Membrane contaminated
– Probe has not been
calibrated for a lengthy
period of time
– Perform an exterior
cleaning and calibration
according to the
operating manual
– Membrane does not
contact gold- working
electrode
– Replace the membrane
head and calibrate
according to the
operating manual
– Shunt resistance caused by
moisture in the probe, plug
or cable
– To check, disconnect
the probe, screw off the
membrane head,
thoroughly rinse the
electrode unit with
distilled water and
completely dry it. -
Connect the probe to
the instrument and
switch to the highest
measuring range (0 -
600 %): If the display is
> 1 digit: There is a
shunt. Send the probe
to WTW for repair.
The probe has been
mechanically
damaged
Measured values
too low
