Xylem YSI VARiON Plus 700 IQ H, Operating Manual, Page: 16 / 62

Commissioning VARiON
® Plus
700 IQ H
16
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When doing so observe the following points:
 The receptacle for the reference electrode is marked by a recess. It
extends into the inside of the sensor clearly deeper than the other
three receptacles (see Fig. 3-3).
 The measurement and compensation electrodes can be mounted in
the remaining three receptacles in any order.
 During installation make sure the area behind the sealing ring of the
electrode and the receptacle are absolutely dry and clean.
 Plug the electrode on the special socket wrench provided and insert
the electrode with the special socket wrench.
 Screw until the electrode is seated on the electrode support without
any gap. Thus the tightness and electrical contacting are granted.
3.3.2 Mounting the protective hood
CH cleaning head
(option)
For permanent operation, we recommend to use the CH cleaning head
for compressed air-driven cleaning. It is mounted instead of the stan-
dard protective hood. The compressed air cleaning is started time-
controlled via the IQ
S
ENSOR
N
ET
system. Information on the required
components is given in the catalog and on the Internet.
If no CH cleaning head is used the standard protective hood should
always be mounted for measuring. It protects the electrodes from rough
mechanical impact.
When mounted, the electrodes can be recognized by the
features described in section
6.3
.