VEGA VEGACAP 64 - transistor (NPN_PNP) - Manual (Page 12)

12
4 Mounting
VEGACAP 64 • - transistor (NPN/PNP)
30014-EN-130916
The process fitting must be sealed if there is gauge or low pressure in
the vessel. Before use, check if the seal material is resistant against
the measured product and the process temperature.
The max. permissible pressure is specified in chapter "Technical
data" or on the type label of the sensor.
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 64, but check if you
can mount a short level switch on the side of the vessel in horizontal
position.
Extreme vibration caused by the system, e.g. due to agitators or
turbulence in the vessel from fluidisation, can cause the probe of
VEGACAP 64 to vibrate in resonance. If a longer rod version is neces-
sary, you can secure the probe by fastening a suitable brace or guy
directly above the end of the rod.
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
To compensate the normal voltage loss due to sealing materials, you
have to additionally use disc springs for fastening flange screws on
PTFE coated flanges. Tighten the screws moderately with the torque
stated in the technical data.
Pressure/Vacuum
Agitators and fluidization
Inflowing medium
Torque with PTFE plated
flanges