VEGA VEGAPULS 63 (≥ 2.0.0 - ≥ 4.0.0) 4 … 20 mA_HART two-wire - Manual (Page 14)

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4 Mounting
VEGAPULS 63 • 4 … 20 mA/HART two-wire
36511-EN-130228
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
nameplate.
4.2 Instructions for installation
The PTFE washer of the antenna encapsulation is also the process
seal. The following must be fulfilled for an effective sealing:
1. Make sure the number of flange screws corresponds to the num-
ber of flange holes
2. Use disc springs to compensate the preload loss of the PTFE
washer
2 1
Fig. 5: Use of disc springs
1 Single disc spring
2 Laminated disc spring
3. Tighten screws with the necessary torque (see chapter "Technical
data")
4. Retighten screws in regular intervals depending on process pres-
sure and temperature
The emitted radar impulses of the radar sensor are electromagnetic
waves. The polarisation plane is the direction of the electrical wave
Screwing in
Moisture
Suitability for the process
conditions
Sealing to the process
Polarisation plane