VEGA Capacitive electrodes EK 4 … 20 mA - Compact - Manual (Page 17)

Capacitive electrodes EK 4 … 20 mA - Compact 17
22574-EN-020809
Mounting
Fig. 2.2 Shortening the electrode
Filling opening
Install the electrode such that it does not pro-
trude directly into a strong filling stream.
Should such an installation location be neces-
sary, mount a suitable protective sheet in front
of the electrode, e.g. L 80 x 8 DIN 1028, etc.
Humidity from outside
To avoid moisture ingress, the connection
cables to the electrode housing of vertically
installed electrodes should be led downward
directly outside the cable entry. Rain and
condensation water can then drain off.
This is mainly valid for outdoor mounting, in
areas where high humidity is expected (e.g.
from cleaning processes) or for cooled or
heated vessels (see fig. 2.3).
Fig. 2.3 Moisture
Cable entries
When mounting outdoors, on cooled vessels
or in humid areas where cleaning is done, e.g.
with steam or high pressure, the seal of the
cable entry is very important.
Use cable with round cross-section conductor
and tighten the cable entry. The cable entry is
suitable for cable diameters of 5 mm to 9 mm.
Metal vessel
Make sure that the mechanical connection of
the electrode to the vessel is electrically con-
ductive in order to ensure sufficient ground-
ing.
Use conductive seals such as e.g. copper,
lead etc. Insulating measures, such as cover-
ing the thread with Teflon tape, can interrupt
the necessary electrical connection. In such a
case, use the earth terminal on the housing to
connect the electrode to the vessel wall.