23
4 Mounting
VEGAPULS 68 • Foundation Fieldbus
36538-EN-170405
Fig. 12: Distance between antenna and socket with parabolic antenna
If the medium has good reflective properties, VEGAPULS 68 with
horn antenna can also be mounted on a longer socket piece. Rec-
ommended values for socket heights are specified in the following
illustration. You must carry out a false signal suppression afterwards.
d
h
max.
Fig. 13: Deviating socket dimensions
Socket diameter d
Socket length h
Recommended anten-
na diameter
40 mm
≤ 100 mm
40 mm
50 mm
≤ 150 mm
48 mm
80 mm
≤ 250 mm
75 mm
100 mm
≤ 500 mm
95 mm
150 mm
≤ 800 mm
95 mm
Socket diameter d
Socket length h
Recommended anten-
na diameter
1½"
≤ 3.9 in
1½"
2"
≤ 5.9 in
2"
3"
≤ 9.8 in
3"
4"
≤ 19.7 in
4"
6"
≤ 31.5 in
4"
Tip:
The instrument is also optionally available with an antenna extension.
The antenna length can be selected (either ex works or later) to allow
the antenna to protrude slightly out of the end of the mounting socket.
Due to the antenna extension however, disturbing reflections are
generated in the close-up range. This can lead to an increase in the