Mounting
Micropilot M FMR 240 with Foundation Fieldbus
14
E Hauser
3.3.2
Engineering hints
Orientation
• Recommended distance (1) wall –
outer
edge
of nozzle: ~1/6 of tank diameter.
Nevertheless the device should not be
installed closer than 15 cm (6“) to the
tankwall.
• Not in the centre (3), interference can cause
signal loss.
• Not above the fill stream (4).
• It is recommended to use a weather
protection cover (2) in order to protect the
transmitter from direct sun or rain. Assembly
and disassembly is simply done by means of a
tension clamp (
→
Chap. 8 on Page 80).
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Tank installations
• Avoid any installations (1), like limit switches,
temperature sensors, etc., inside the signal
beam (refer to beam angle see "Beam angle"
on Page 16).
• Symmetrical installations (2), i.e. vacuum
rings, heating coils, baffles, etc., can also
interfere with the measurement.
Optimization options
• Antenna size: the bigger the antenna, the
smaller the beam angle, the less interference
echoes.
• Mapping: the measurement can be optimized
by means of electronic suppression of
interference echoes.
• Antenna alignment: refer to "optimum
mounting position"
• Stilling well: a stilling well respectively a
Wave Guide antenna can always be used to
avoid interference.
• Metallic screens (3) mounted at a slope spread
the radar signals and can, therefore, reduce
interference echoes.
Please contact Hauser for further infor-
mation.
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1
3
2
a
