Siemens SITRANS T Series Compact Operating Instructions page 21

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
Incorrect mounting of temperature sensors on SITRANS TF
Risk of explosion in hazardous areas. If you attach a temperature sensor to an explosion-proof
SITRANS TF enclosure via the cable inlet, you must observe the special conditions.
• Observe the ambient temperature, the type of protection and the electrical data in the
• The medium temperature influences the ambient temperature of the SITRANS TF device. If
• The installation of a temperature sensor may increase the volume for the pressure-resistant
• Arrange to have the installation of a temperature sensor on a SITRANS TF evaluated by an
SITRANS TH320/TH420/TR320/TR420/TF320/TF420
Compact Operating Instructions, 05/2020, A5E41865021-AC
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 73).
WARNING
certificate of the SITRANS TF device and/or in the chapter Technical data (Page 73).
necessary, reduce the ambient temperature for the SITRANS TF. Refer to the information on
the nameplate and/or in Technical data (Page 73).
enclosure.
accredited approval body.
Safety notes
3.3 Use in hazardous areas
21