19
4 Mounting
VEGAPULS 61 • Profibus PA
28444-EN-141215
max.
min.
2
1
Fig. 15: Pipe antenna system in a tank. The vent hole in the surge pipe must be
in one plane with the polarisation marking on the sensor.
1 Marking of the polarisation direction
2 Vent hole max. ø 5 mm (0.2 in)
If possible, the antenna diameter of the sensor should correspond
to the inner diameter of the tube. With VEGAPULS 61 this is approx.
40 mm (1.575 in). The sensor can be used with tube diameters be-
tween 40 … 80 mm (1.575 … 3.15 in).
Bypass tube
As an alternative to the surge pipe in the vessel, a tube system out-
side of the vessel is possible as a bypass tube. Select during setup
the function "
Bypass tube
".
Align the sensor in such a way that the polarisation marking on the
process fitting is in the same plane as the tube holes or the tube con-
nection openings (see illustration: "
VEGAPULS in a bypass tube
").
