Installing/mounting
4.2 Mounting location
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 01/2014, A5E32221386-AB
19
Beam angle
Note
•
Beam width depends on antenna size: see below.
•
For details on avoiding false echoes, see Auto False Echo Suppression (Page 207).
●
Beam angle is the width of the cone where the energy density is half of the peak energy
density.
●
The peak energy density is directly in front of and in line with the antenna.
●
There is a signal transmitted outside the beam angle, therefore false targets may be
detected.
①
Emission cone
Size
Beam angle
②
Horn
1.5"
19°
2"
15°
3"
10°
4"
8°
③
Flanged encapsulated 2"/DN50/50A
12.8°
3"/DN80/80A
9.6°
4"/DN100/100A
9.6°
6"/DN150/150A
9.6°
④
Threaded PVDF
19°
Emission cone
●
Keep emission cone free of interference from ladders, pipes, I-beams, or filling streams.