VEGA VEGAPULS 51V…54V - Manual (Page 29)

VEGAPULS 51 V … 54 V 29
Do not mount the transmitter in the centre of
the dished end of the tank or close to the
outer wall of the vessel, but approx.
1 /
2
vessel
radius from the middle or from the outer wall.
Dished tank ends can act as paraboloidal
reflectors. If the radar sensor is placed in the
"focus" of a parabolic tank end, the sensor
receives amplified false echoes. The radar
sensor must be mounted outside the "focus"
hence parabolic amplified echoes are
avoided.
Mounting directly on the flat vessel top
Reference pane
Mounting on dished vessel end
Reference pane
1 /
2
vessel radius
Mounting and installation - Measurement of liquids
Rod antenna on DIN-socket piece
Rod antenna
The PTEF (Teflon) rod antenna is well suited
to chemically aggressive products such as
lyes and acids. Applications in the food
processing industry with aseptic vessel
conditions are catered for with the Teflon rod
antenna close tolerance and crevice free
construction.
For measurements of liquids with the Teflon
rod antenna, the mounting is made on a
straight DIN-socket piece. The socket
however must not be longer than 150 mm
(when using a longer antenna, not longer
than 250 mm). The rod antenna is available in
flange sizes of DN 50, DN 80 and DN 100.
Rod antenna directly on vessel opening
≤ 100 or 250 mm
Opening
ø 50 mm
Horn antenna directly on the vessel top
Dependent on the construction of the vessel,
flat mounting directly on the vessel top would
be a favourable solution. The top side of the
vessel is the reference pane.