Table of Contents
Advertisement
The measured value
strongly fluctuates
Measured values are
too high
Cause
– Membran nicht an Platin-
Arbeitselektrode anliegend
– There is a tiny hole in the
membrane, directly in front
of the working electrode
Cause
– The has not yet completely
polarized
– Probe has not been
calibrated for a lengthy
period of time
– Shunt resistance caused by
moisture in the probe, plug
or cable
What to do if ...
Remedy
– Replace the membrane
head and calibrate
according to the
operating manual
– Replace the membrane
head and recalibrate
according to the
operating manual, if
necessary clean the
electrodes
Remedy
– Wait for the polarization
to be completed (2 h)
– Perform an exterior
cleaning and calibration
according to the
operating manual
– 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.
37
Advertisement
Table of Contents
