VEGA VEGAVIB 67 - two-wire - Manual (Page 12)

Warning:
The housing must not be used to screw in the instrument!
Applying tightening force on the housing can damage its
internal mechanical parts.
To screw in, use the hexagon above the thread.
4.2 Mounting information
Agitators, equipment vibration, etc., can cause the level switch
to be subjected to strong lateral forces. For this reason, do not
use an overly long extension tube for VEGAVIB 67, but check if
you can mount a short level switch on the side of the vessel in
horizontal position.
Extreme vibration caused by the process or the equipment, e.
g. agitators or turbulence in the vessel e.g. from fluidization,
can cause the extension tube of VEGAVIB 67 to vibrate in
resonance. This leads to increased stress on the upper weld
joint. Should a longer tube version be necessary, you can
provide a suitable support or guy directly above the tuning fork
to secure the extension tube.
This measure applies particularly to applications in Ex areas.
Make sure that the tube is not subjected to bending forces
through this measure.
If VEGAVIB 67 is mounted in the filling stream, unwanted
switching signals may be generated. Mount VEGAVIB 67 at a
location in the vessel where no disturbing influence from e.g.
filling openings, agitators etc. can occur.
This applies particularly to instrument types with long
extension tube.
Agitators and fluidization
Inflowing material
12 VEGAVIB 67 - with two-wire output
Mounting
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