Pressure Equipment Directive, Ped, 97/23/Ec; Mounting Location; Nozzle Design; Nozzle Location - Siemens Sitrans LR200 Instruction Manual

Pressure Equipment Directive, PED, 97/23/EC

Siemens Level Transmitters with flanged, threaded, or sanitary clamp type process
mounts have no pressure-bearing housing of their own and, therefore, do not come under
the Pressure Equipment Directive as pressure or safety accessories, (see EU Commission
Guideline 1/8).

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
150.
• 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 Rep-
resentative.
• Avoid central locations on
vessels
Page 16 SITRANS LR200 (HART) – INSTRUCTION MANUAL
Appendix G: Flange Adapter Versions
shield
Coni
preferred
Conical
undesirable
locking ring secured by three
2 mm Allen set-screws
threaded connection
10 mm
(0.4")
Fl at
Flat Parabolic
7ML19985JP02
on page
100 mm
(4")