VEGA VEGACAP 65 - transistor (NPN_PNP) - Manual (Page 12)

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4 Mounting
VEGACAP 65 • - transistor (NPN/PNP)
30018-EN-130916
If condensate forms on the vessel top, the run-off liquid can cause
bridging and hence faulty switchings.
For this reason, use a screening tube or a longer insulation. The
length depends on the amount of condensate and the drain-off be-
haviour of the product.
4.2 Mounting instructions
Due to the effects of agitators, equipment vibration or similar, the level
switch can be subjected to strong lateral forces. For this reason, do
not use an overly long electrode for VEGACAP 65, but check if you
can mount a short level switch on the side of the vessel in horizontal
position.
If the instrument is mounted in the filling stream, unwanted false
measurement signals can be generated. For this reason, mount the
instrument at a position in the vessel where no disturbances, e.g. from
filling openings, agitators, etc., can occur.
This applies particularly to instrument versions with a longer probe.
Fig. 5: Inflowing medium
The probe should protrude into the vessel to avoid buildup. For that
reason, avoid using mounting bosses for flanges and screwed fittings.
This applies particularly to use with adhesive products.
In silos with bulk solids, material cones can form which change the
switching point. Please keep this in mind when installing the sensor
in the vessel. We recommend selecting an installation location where
the probe detects the average value of the material cone.
The probe must be mounted in a way that takes the arrangement of
the filling and emptying apertures into account.
Condensation
Agitators and fluidization
Inflowing medium
Socket
Material cone