VEGA VEGAPULS SR 68 4 … 20 mA_HART two-wire - Manual (Page 14)

14
4 Mounting
VEGAPULS SR 68 • 4 … 20 mA/HART two-wire
38294-EN-130624
4 Mounting
4.1 General instructions
On instruments with process fitting thread, the hexagon must be tight-
ened with a suitable screwdriver. Wrench size see chapter "Dimen-
sions".
Warning:
The housing must not be used to screw the instrument in! Applying
tightening force can damage internal parts of the housing.
Protect your instrument further through the following measures
against moisture penetration:
•
Use the recommended cable (see chapter "Connecting to power
supply")
•
Tighten the cable gland
•
Loop the connection cable downward in front of the cable gland
This applies particularly to:
•
Outdoor mounting
•
Installations in areas where high humidity is expected (e.g. through
cleaning processes)
•
Installations on cooled or heated vessels
Make sure that all parts of the instrument exposed to the process are
suitable for the existing process conditions.
These are mainly:
•
Active measuring component
•
Process fitting
•
Process seal
Process conditions are particularly:
•
Process pressure
•
Process temperature
•
Chemical properties of the medium
•
Abrasion and mechanical influences
You can find the specifications of the process conditions in chapter
"Technical data" as well as on the nameplate.
4.2 Mounting preparations - Parabolic antenna
The instrument is also available in versions where the antenna has
a diameter larger than the process fitting (thread, flange). With such
versions the antenna must be disconnected from the process fitting
before mounting. Proceed as follows:
1. Clamp VEGAPULS SR 68 with the flange, e.g. in a bench vice
2. Hold the connection piece (3) with a wrench on the flat surfaces
(width across flats 22 mm)
3. Loosen counter nut (2) completely with a wrench (width across
flats 36 mm) in the direction of the antenna
Screwing in
Protection against mois-
ture
Suitability for the process
conditions