Installing/mounting
4.3 Proper mounting
SITRANS LR250 (PROFIBUS PA)
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Operating Instructions, 08/2014, A5E32221386-AC
4.3.2
Nozzle location
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Avoid central locations on tall, narrow vessels
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Nozzle must be vertical and clear of imperfections
Preferred
Undesirable
Beam angle
Note
•
Beam width depends on antenna size and is approximate: see below.
•
For details on avoiding false echoes, see Auto False Echo Suppression.
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Beam angle is the width of the cone where the energy density is half of the peak energy
density.
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The peak energy density is directly in front of and in line with the antenna.
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There is a signal transmitted outside the beam angle, therefore false targets may be
detected.