VEGA VEGAPULS 65 (≥ 2.0.0 - ≥ 4.0.0) HART and accumulator pack - Manual (Page 14)

14
4 Mounting
VEGAPULS 65 • HART and accumulator pack
40932-EN-121011
4 Mounting
4.1 General instructions
With instruments with threaded process fitting, suitable tools must be
applied for tightening the hexagon.
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Use the recommended cables (see chapter "Connecting to power
supply") and tighten the cable gland.
You can give your instrument additional protection against moisture
penetration by leading the connection cable downward in front of the
cable entry. Rain and condensation water can thus drain off. This ap-
plies mainly to outdoor mounting as well as installation in areas where
high humidity is expected (e.g. through cleaning processes) or on
cooled or heated vessels.
Make sure that all parts of the instrument exposed to the process, in
particular the active measuring component, process seal and process
fitting, are suitable for the existing process conditions. These include
above all the process pressure, process temperature as well as the
chemical properties of the medium.
You can find the specifications in chapter "Technical data" and on the
type label.
4.2 Instructions for installation
The flange screws must be tightened so that the PTFE washer of
the encapsulated antenna system seals effectively. You can find the
required torque in the technical data.
You can counteract the material-induced tension loss with PTFE by
doing the following:
1. Make sure the number of flange screws corresponds to the num-
ber of flange holes
2. Use disc springs in addition to the flange screws for fastening the
flange
3. Tighten all screws with the torque stated in the technical data
The emitted radar impulses of the radar sensor are electromagnetic
waves. The polarisation plane is the direction of the electrical wave
component. By turning the instrument in the connection flange or
mounting boss, the polarisation can be used to reduce the effects of
false echoes.
The position of the polarisation plane is marked on the process fitting
of the instrument.
Screwing in
Moisture
Suitability for the process
conditions
Sealing of the encapsu-
lated antenna system
Polarisation plane