Appendix A: Technical reference
A.3 Maximum Process Temperature Chart
SITRANS LR250 (PROFIBUS PA)
242 Operating Instructions, 08/2014, A5E32221386-AC
Maximum Process Temperature Chart
Exceeded maximum internal and process temperatures
Danger of device malfunction
• Internal temperature must not exceed +80 ° C (+176 °F).
• Process temperature must not exceed limits specified by the antenna type.
The chart below is for guidance only.
The chart does not represent every possible process connection arrangement. For
example, it will NOT apply if you are mounting SITRANS LR250 directly on a metallic
vessel surface.
The chart does not take into consideration heating from direct sunlight exposure.
Maximum Process Temperatures versus allowable ambient
Internal enclosure temperature
Process temperature (at process
connection)
Where the chart does not apply, please use your own judgement regarding the use of SITRANS
LR250.
If the internal temperature exceeds the maximum allowable limit, a sun shield or a longer nozzle
may be required.
See
and
to monitor the Internal Temperature.
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