VEGA VEGAPULS 51K…54K Profibus PA - Manual (Page 15)

VEGAPULS 51P … 54P 15
24890-EN-041227
Mounting and installation
Mounting directly on flat vessel top
Reference plane
Mounting on round vessel tops
Reference plane
1 /
2
vessel radius
Horn antenna directly on the vessel top
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. Rod antenna on DIN socket piece
Rod antenna directly on vessel opening
≤ 100 mm or
250 mm
Opening
ø 50 mm
Rod antenna
Rod antenna on DIN socket piece
The PTFE (Teflon) rod antenna is mainly used
for corrosive substances such as alkalis and
acids. Applications in the food processing
industry with sterilised vessels often require
measuring systems made of inert materials,
as well as small vessel openings. The Teflon
rod antenna is not only inert, but can also be
mounted in very small vessel openings
(50 mm or 1
1 /
2
“ threaded holes).
For the measurement of liquids, the Teflon rod
antenna is mounted on a straight DIN socket
piece. The socket must not be longer than
150 mm (when using the longer antenna, not
longer than 250 mm). Rod antennas are avail-
able with DN 50, DN 80 and DN 100.
Rod antenna directly on vessel opening
On dished vessel tops, please do not mount
the instrument in the centre or close to the
vessel wall, but approx.½ vessel radius from
the centre or from the vessel wall.
Dished tank tops can act as paraboloidal
reflectors. If the radar sensor is placed in the
focal point of the parabolic tank top, the radar
sensor receives amplified false echoes. The
radar sensor should be mounted outside the
focal point. Parabolically amplified echoes are
thereby avoided.