Operating Instructions

Table Of Contents
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 (Page 228).
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
2
Emission cone
Beam angle
Emission cone type and beam angle
Antenna type Antenna size Beam angle
Horn 1.5" 19°
2" 15°
3" 10°
4"
Threaded PVDF 19°
Process connection
size
Process connection type
Installing/mounting
4.3 Proper mounting
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG 27