VEGA VEGAPULS 45 VBUS - Manual (Page 17)

VEGAPULS 42, 44 and 45 – VBUS 17
Mounting and installation
Mounting directly on the flat vessel top
Reference plane
Mounting on dished tank ends
Reference plane
½ vessel radius
If the stability of the vessel will allow it (sensor
weight), flat mounting directly on the vessel
top is a good and economical solution. The
top side of the vessel is the reference plane.
Screw-on antenna with antenna extension on socket
piece 1½"
≤
250 mm
Screw-on antenna
The screw-on antenna is mainly used on
small vessels. The antenna fits on small ves-
sel openings down to 1
1 /
2
" socket. The socket
must not be longer than 135 mm (when using
the longer antenna, not longer than 250 mm).
On dished tank ends, please do not mount
the instrument in the centre or close to the
vessel wall, but approx.
1 /
2
vessel radius from
the centre or from the vessel wall.
Dished tank ends can act as paraboloidal
reflectors. If the radar sensor is placed in the
focal point of the parabolic tank, the radar
sensor receives amplified false echoes. The
radar sensor should be mounted outside the
focal point. Parabolically amplified echoes
can be thereby avoided.
Screw-on antenna on socket piece 1 1 /
2
"
≤
135 mm
Reference plane
Vessel center or
symmetry axis
As an alternative to socket mounting, the
screw-on antenna can be screwed into the
hole in the vessel.
Rod antenna directly on vessel opening