Wohler WA 335 Instructions De Service page 62

Measuring with the O2 Probe (option)
O -Probe
2
sprue
Fig. 47: Membran-Set with sprue
62
following situations occurs:
- The probe has been used for more than 1
year
- Error E2/E3 , but the probe central working
area is clean
- Electrolyte less than ½ full
- Membrane is broken or wrinkled
- Measuring speed is much slower than
before
CAUTION!
The structure of the membrane is delicate.
Once the membrane set has been removed
from the probe, do not re-install the same mem-
brane set, as it might influence the reading.
Change the membrane-set as follows:
• Unscrew the membrane-set from the probe.
CAUTION!
Any electrolyte still present may leak out. Hold
the electrode down.
Clean the probe as described before.
•
Carefully fill the electrolyte-solution into the
•
sprue of the membrane-set until it is full.
Screw the new and filled membrane set on
•
the probe.
NOTE!
After that it is normal to find small bubbles in-
side of the membrane.