VEGA VEGAPULS SR 68 4 … 20 mA_HART - four-wire - Manual (Page 22)

22
4 Mounting
VEGAPULS SR 68 • 4 … 20 mA/HART - four-wire
38295-EN-130624
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
required minimum distance, especially with poorly reflecting media
such as plastic powder. In practice, a cleanly constructed mounting
socket, if necessary with rounded edges, introduces fewer disturbing
influences than an antenna extension.
To measure as much of the vessel volume as possible, the sensor
should be aligned so that the measuring beam reaches the lowest
level in the vessel. In a cylindrical silo with conical outlet mounting is
carried out on a socket. It should be positioned on one third up to the
half of the vessel radius.
Orientation