Siemens SITRANS P Operating Instructions Manual page 22

Safety information
3.3 Use in hazardous areas
Use in hazardous area
Risk of explosion.
● Only use equipment that is approved for use in the intended hazardous area and labeled
● Do not use devices that have been operated outside the conditions specified for hazardous
Loss of safety of device with type of protection "Intrinsic safety Ex i"
If the device or its components have already been operated in non-intrinsically safe circuits or
the electrical specifications have not been observed, the safety of the device is no longer
ensured for use in hazardous areas. There is a risk of explosion.
● Connect the device with type of protection "Intrinsic safety" solely to an intrinsically safe
● Observe the specifications for the electrical data on the certificate and/or in Technical data
Use of incorrect device parts in potentially explosive environments
Devices and their associated device parts are either approved for different types of protection
or they do not have explosion protection. There is a risk of explosion if device parts (such as
covers) are used for devices with explosion protection that are not expressly suited for this
type of protection. If you do not adhere to these guidelines, the test certificates and the
manufacturer warranty will become null and void.
● Use only device parts that have been approved for the respective type of protection in the
● Do not swap device parts unless the manufacturer specifically ensures compatibility of
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.
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WARNING
accordingly.
areas. If you have used the device outside the conditions for hazardous areas, make all Ex
markings unrecognizable on the nameplate.
WARNING
circuit.
(Page 199).
WARNING
potentially explosive environment. Covers that are not suited for the "explosion-proof" type
of protection are identified as such by a notice label attached to the inside of the cover with
"Not Ex d Not SIL".
these parts.
WARNING
SITRANS P320/P420 with 4 to 20 mA/HART
Operating Instructions, 11/2019, A5E44852162-AC