Appendix A: Technical reference
A.4 Process Pressure/Temperature Derating Curves
SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
243
Process Pressure/Temperature Derating Curves
Exceeded maximum permissible operating pressure
Danger of injury or poisoning.
The maximum permissible operating pressure depends on the device version. The device
can be damaged if the operating pressure is exceeded. Hot, toxic and corrosive process
media could be released.
• Make sure that the device is suitable for the maximum permissible operating pressure of
your system.
Danger to personnel, system and environment will result from improper disassembly.
• Never attempt to loosen, remove, or disassemble process connection while vessel
contents are under pressure.
Danger to personnel, system and environment can result from improper installation.
• Improper installation may result in loss of process pressure.
Unsuitable connecting parts
Danger of injury or poisoning.
In case of improper mounting hot, toxic and corrosive process media could be released at
the connections.
• Ensure that connecting parts (such as flange gaskets and bolts) are suitable for
connection and process media.
Note
Material compatibility
Siemens can provide you with support concerning selection of sensor components wetted by
process media. However, you are responsible for the selection of components. Siemens
accepts no liability for faults or failures resulting
from incompatible materials.
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