Mounting Location; Nozzle Design; Nozzle Location - Siemens sitrans LR200 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

Notes:
• For nozzles 100 mm (4") in length or shorter use the 100 mm (4") shield.
• For nozzles 250 mm (10") in length or shorter use the 250 mm (10") shield.
• For details on other applications, see
page 142.
• The end of the shield section should
protrude a minimum of 10 mm (0.4")
to avoid false echoes being
reflected from the nozzle.
Location on a manhole cover
• A manhole cover is typically a
covered nozzle with a diameter
610 mm (24") or greater.
• For optimum signal conditions,
locate the antenna off-center,
typically 100 mm (4") from the side.

Nozzle location

WARNING: For vessels with conical or parabolic tops, avoid mounting
the instrument at the centre. (The concavity of the top can focus
echoes into the centre, giving false readings.)
Under certain circumstances, it may be acceptable to mount SITRANS LR200 at
Note:
the centre of a flat-topped tank: please discuss this with your Siemens Milltronics
Representative.
• Avoid central locations on
vessels
preferred
undesirable
1)
When the locking ring is secured, it prevents the enclosure rotating on the threaded connection.
Page 12 SITRANS LR200 (PROFIBUS PA) – INSTRUCTION MANUAL
Appendix H: Flange Adapter Versions
1)
shield
Coni
Conical
1)
locking ring secured by
three 2 mm Allen set-screws
threaded connection
10 mm (0.4")
100 mm (4")
Fl at
Flat Parabolic
7ML19985JR01
on