VEGA VEGAFLEX 83 Profibus PA PFA insulated - Manual (Page 16)

16
4 Mounting
VEGAFLEX 83 • Profibus PA
44226-EN-130910
4 Mounting
4.1 General instructions
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
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
openings for the cable glands are therefore covered with red protec-
tive 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.
The suitable cable glands and blind plugs come with the instrument.
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 instructions
Mount VEGAFLEX 83 in such a way that the distance to vessel instal-
lations or to the vessel wall is at least 300 mm (12 in). In non-metallic
vessels, the distance to the vessel wall should be at least 500 mm
(19.7 in).
During operation, the probe must not touch any installations or the
vessel wall. If necessary, fasten the probe end.
In vessels with conical bottom it can be advantageous to mount the
sensor in the center of the vessel, as measurement is then possible
nearly down to the lowest point of the bottom. Keep in mind that
Protection against mois-
ture
Protective caps
Suitability for the process
conditions
Installation position