Mounting Location; Nozzle Design; Nozzle Location - Siemens Sitrans LR250 Instruction Manual

Mounting location

Notes:
• Correct location is key to a successful application.
• Avoid reflective interference from vessel walls and obstructions by following the
guidelines below

Nozzle design

• The end of the horn must protrude
a minimum of 10 mm (0.4") to avoid
false echoes being reflected from
the nozzle.
• An antenna extension:
(100 mm/3.93") is available.

Nozzle location

Notes:
• Beam width depends on horn size:
see below.
• For details on avoiding false echoes,
Auto False Echo Suppression
see
page 105.
• Keep emission cone free of
interference from ladders,
pipes, I-beams or filling
streams.
• Make allowance for beam
width to avoid interference
with emission cone
• Avoid central locations on
tall, narrow vessels.
Page 16 SITRANS LR250 (HART) – INSTRUCTION MANUAL
emission
on
cone
19°
preferred
undesirable
Min. clearance:
10 mm (0.4")
beam width:
1.5" horn = 19°
2" horn = 15°
3" horn = 10°
4" horn = 8°
7ML19985JE01