VEGA VEGAPULS 68 (≥ 2.0.0 - ≥ 4.0.0) HART - integrated accumulator - Manual (Page 21)

21
4 Mounting
VEGAPULS 68 • HART - integrated accumulator
40935-EN-121011
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.
r
r r... / 1 3 / 1 2
Fig. 16: Orientation
If mounting in the centre of the silo is not possible, the sensor can be
directed to the vessel center by using the optional swivelling holder.
The following description shows a simple way to determine the
required angle of inclination.
Orientation