VEGA Capacitive electrodes EK … with signal conditioning instrument - Manual (Page 21)

Capacitive electrodes EK with signal conditioning instrument 21
Fixing weight
Fig. 2.6 Cable electrode in solids
Mounting
Cable electrodes in solids
Dependent on the kind of solid and position
or kind of filling, the cable electrode can
"float“ despite of the gravity weight. The elec-
trode (cable) is pushed by the solid to the
vessel wall or to the top and wrong meas-
ured values are caused. This should be
avoided with the continuous level measure-
ment.
In this case use a fixing weight to fasten the
electrode.
When fixing the cable electrode avoid high
tensile strengths. An appropriate fixing
spring avoiding overloading of the cable is
listed in our pricelist as accessory (see fig.
2.6)
Lateral installation
With electrodes, delivering continuous meas-
ured values, the electrode must only be in-
stalled vertically. Should the installation from
top not be possible, the electrodes can also
be mounted laterally (see fig. 2.7)
If there are struts or a roof at the installation
place of the electrode, you should check if a
rod electrode of the requested length can be
mounted. If a mounting of the rod electrode is
not possible, use a cable electrode.
Under the accessory in our pricelist you find
a screening tube and a closing cone or a
bent rod electrode by which the electrode
can be also mounted laterally. Choose the
length (l) of the screening tube such that no
product bridges can be caused between
cable and vessel wall and that the electrode
cable cannot touch the vessel wall due to
product movements. Use a fixing weight or a
fixing insulator.
Fig. 2.7 Continuous electrodes
Fig. 2.5 Rod electrodes
max. 80 mm