Mounting Location - Siemens SITRANS LR250 Instruction Manual

Mounting location

Recommendations:
• Maintain ambient temperature within –40 to +80 °C (–40 to +176 °F).
• Provide easy access for viewing the display and programming via the hand
programmer.
• Provide an environment suitable to the housing rating and materials of construction.
• Use a sunshield if the instrument will be exposed to direct sunlight (even though the
LCD has UV protection).
Precautions:
• Avoid interference to the emission cone from obstructions or from the fill path.
• Avoid central locations on vessels.
ambient temperature
(surrounding enclosure volume)
–40 °C to 80 °C (–40 °F to 176 °F)
process temperature
–40 to +150 °C (–40 to +302 °F)
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 LR250 at
Note:
the centre of a flat-topped tank: please discuss this with your Siemens Milltronics
representative.
preferred
undesirable
Page 12 SITRANS LR250 (HART) – INSTRUCTION MANUAL
hand programmer
Coni
Conical Flat
GRAPHIC TO BE UPDATED
Fl at
Parabolic
nameplate
process
device tag
customer-
supplied
flange
7ML19985JE01