7
3 Mounting
VEGAFLEX 81 • Foundation Fieldbus
47589-EN-140324
3 Mounting
3.1 General instructions for use of the instrument
Protect your instrument against moisture penetration through the fol-
lowing measures:
•
Use the recommended cable (see chapter "
Connecting to power
supply
")
•
Tighten the cable gland
•
Turn the housing in such a way that the cable gland points down-
ward
•
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
3.2 Mounting instructions
Mount VEGAFLEX 81 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
measurement all the way down to the tip of the probe may not be pos-
sible. The exact value of the min. distance (lower dead band) is stated
in chapter "
Technical data
".
Fig. 2: Vessel with conical bottom
Protection against mois-
ture
Installation position
