20
4 Mounting
VEGAPULS 66 • 4 … 20 mA/HART - two-wire
28438-EN-170927
100%
0%
1
> 500 mm
Fig. 14: VEGAPULS 66 in a bypass tube. The polarisation marking on the
process fitting must be in one plane with the tube holes or the tube connection
openings.
1 Marking of the polarisation direction
When the sensor is mounted on a bypass tube, the distance from
VEGAPULS 66 to the upper tube connection should be approx.
500 mm (19.69 in) or more. In case of extremely rough tube inner
walls, you should use an inserted tube (tube in tube) or a radar sensor
with tube antenna.
Information:
With VEGAPULS 66 the polarisation level is always in the centre
between two flange holes.
1
2
3
4
Fig. 15: Polarisation level - view from top to the sensor and bypass tube. The
sensor housing is not shown.
1 Position of the polarisation level
2 Flange hole
3 Upper tube connection
4 Polarisation marking