Xylem YSI VARiON Plus 700 IQ H, Operating Manual, Page: 42 / 62

Maintenance and electrode exchange VARiON
® Plus
700 IQ H
42
ba76207e02 12/2020
6.3 Exchanging the electrodes
Use the special socket wrench provided to dismantle an electrode.
Electrodes are installed as described in section 3.3.1 E
QUIPPING THE
SENSOR WITH ELECTRODES
.
Recognizing the
electrode type from
outside
When mounted, the electrodes can be recognized by the following fea-
tures:
NOTICE
The sensor can be damaged by dirt and moisture. Each
time before dismantling an electrode carefully clean the
area around the electrodes (section 6.2). Before mount-
ing an electrode make sure the area behind the sealing
ring of the electrode and the receptacle are dry and
clean. The VARiON®Plus 700 IQ H may only be sub-
mersed when the electrodes or original blind plugs are
mounted.
Electrode Hexagon Front sur-
face Other features
VARiON
® Plus
Ref
black black
– Thread at the
hexagon
VARiON
® Plus
NH4
black black
– Hexagon with-
out thread
VARiON
® Plus
K
black white
VARiON
® Plus
NO3
white white
– Labeled with the
electrode type
VARiON
® Plus
Cl
black black
– Larger mem-
brane
– Membrane flush
with the front
surface