Maximum Process Temperature Chart - Siemens 7ML5431 Operating Instructions Manual

Appendix A: Technical reference
A.4 Maximum Process Temperature Chart
A.4

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.
Note
• 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
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 Current Internal Temperature (3.2.1.) to monitor the Internal Temperature.
244
WARNING
①
Internal enclosure temperature
②
Ambient temperature
③ Process temperature (at process connec-
tion)
SITRANS LR250 with mA/HART
Operating Instructions, 10/2019, A5E32220602-AG