WT.050.560.001.UA.IM.0714
69
Depolox
®
3 plus ReSIDUAl ANAlYZeR
eVoQUA
W3T140188
4. As a rule, the G-holder remains in the membrane cap.
5. Pour out the electrolyte.
6. Wash the electrode finger with clean (distilled) water and allow it to
air dry.
7. Rub gold working electrode with the included lapping paper (special
emery). To do this, lay the lapping paper on a paper towel, take hold
of the corner and while holding the measuring cell vertically, slide the
electrode end two to three times over the rough side of the lapping
paper.
For further procedure, see “Commissioning the membrane sensor for free
chlorine FC1”. If the sensor’s measuring signal is still too low or irregular,
a new membrane cap must be used. The measuring cell requires one to
two hours before it can be calibrated.
3.4.6.2
Membrane Sensor for Chlorine Dioxide CD7
The CD7 membrane sensor enables the chlorine dioxide content in all types
of water to be determined selectively, without cross-sensitivity to chlorine,
bromine and hydrogen peroxide, however, with cross-sensitivity to ozone and
peracetic acid. The sensor does not demonstrate a pH value dependency and
is therefore very suitable for water with various pH values.
CAUTION: The electrode fingers (reference electrodes) and membrane are
extremely sensitive! Do not touch, soil or damage! Before unscrewing the
filled membrane cap, push the elastomer seal to one side to permit the inflow
of air through the vent underneath it! Otherwise, the membrane may be
damaged due to developing negative pressure. Do not sand down the light
yellowish-gray deposit of the electrode finger or wipe it in the direction of
the gold working electrode
!
Commissioning the Membranesensor for Chlorine Dioxide CD7
1. Screw off the membrane cap from the electrode shaft and fill with the
included gel electrolyte.
2. Tap on the membrane cap with the electrode shaft until air bubbles
are removed.
3. Rub gold working electrode with the included lapping paper (special
emery). To do this, lay the lapping paper on a paper towel, take hold
of the corner and while holding the measuring cell vertically, slide the
electrode end one to two times over the rough side of the lapping paper.
!
Summary of Contents for Wallace & Tiernan Depolox 3 plus
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