Siemens SITRANS P320 Compact Operating Instructions page 21

Use of the device with intrinsic safety "Ex i" type of protection in a polluted environment.
If you open the device on the display side, there is a risk of pollution. The safety of the device
for use in hazardous areas is therefore no longer guaranteed. There is a danger of explosion.
• Ensure that the environment is clean before rotating or replacing the display.
Incorrect material for the diaphragm in Zone 0
Risk of explosion in the hazardous area. If operated with intrinsically safe supply devices of
category "ib" or devices of the flameproof enclosure version "Ex d" and simultaneous use in
Zone 0, pressure transmitter explosion protection depends on the tightness of the diaphragm.
• Ensure that the material used for the diaphragm is suitable for the process medium. Refer
SITRANS P320/P420
Compact Operating Instructions, 09/2021, A5E38874562-AD
WARNING
WARNING
to the information in the section "Technical data (Page 63)".
Safety notes
3.3 Use in hazardous areas
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