Mounting Instructions - Vega VEGAVIB 63 Operating Instructions Manual

Cable entries - NPT
thread
Cable glands
Agitators and fluidization
Inflowing medium
VEGAVIB 63 • - contactless electronic switch
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Use the hexagon above the thread for screwing in.
Metric threads
In the case of instrument housings with metric thread, the cable
glands are screwed in at the factory. They are sealed with plastic
plugs as transport protection.
You have to remove these plugs before electrical connection.
NPT thread
In the case of instrument housings with self-sealing NPT threads, it is
not possible to have the cable entries screwed in at the factory. The
free openings for the cable glands are therefore covered with red dust
protection caps as transport protection.
Prior to setup you have to replace these protective caps with ap-
proved cable glands or close the openings with suitable blind plugs.
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 extension tube for VEGAVIB 63, but check if
you can mount a short level switch on the side of the vessel in hori-
zontal position.
Extreme vibration caused by the process or the equipment, e.g. agita-
tors or turbulence in the vessel, e.g. by fluidisation, can cause the
extension tube of VEGAVIB 63 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 directly above the
vibrating element to secure the extension tube.
This measure applies mainly to applications in Ex areas. Make sure
that the tube is not subject to bending stress due to this measure.
If VEGAVIB 63 is mounted in the filling stream, unwanted false meas-
urement signals can be generated. For this reason, mount VEGAVIB
63 at a position in the vessel where no disturbances, e.g. from filling
openings, agitators, etc., can occur.
This applies particularly to instrument types with long extension tube.
4 Mounting
11