Installing/mounting
3
3.1 Basic safety notes
3.1.1 ATEX/IECEx and others
3.1.1.1 Safety information for installation in "Intrinsic safety "ia/ib"
Zones 0, 1, 2, 20, 21, 22 and M1
General installation information
The first two digits of the serial number stand for the year of production. With aluminum
enclosures, you also have to make sure during installation that ignition sources due to sparks
caused by impact or friction are prevented. With enclosures made of non-metallic materials or
painted metal, prevent an electrostatic charge from forming.
The distance between terminals, including the stripped core, must be a minimum of 3 mm from
each grounded metal part.
The test terminals allow for direct measurement of the loop current without impairing the loop
integrity. When using the test terminals, the temperature transmitter must be connected to the
power supply. Only use certified testing devices for installation in hazardous areas. If the
temperature transmitter is used in Ex nA or Ex ec type of protection, it can no longer be used
with intrinsic safety afterwards.
Note the following instructions for installation in a hazardous gas atmosphere:
The temperature transmitter must be installed in an enclosure of form B in accordance with
DIN 43729 or equivalent so that at least IP20 protection in accordance with IEC/EN 60529 is
guaranteed.
The enclosure must be suitable for the application and installed to meet the applicable
regulations.
Note the following instructions for installation in a hazardous dust atmosphere:
The temperature transmitter must be installed in a metal enclosure of form B in accordance
with DIN 43729 or equivalent so that at least IP6X protection in accordance with IEC/EN 60529
is guaranteed.
The enclosure must be suitable for the application and installed to meet the applicable
regulations. Cable entries and dummy elements must meet the same requirements.
The maximum surface temperature on the outside of the enclosure is 20 K higher than the
maximum ambient temperature.
Note the following instructions for installation in mines:
The temperature transmitter must be installed in a metal enclosure which guarantees at least
IP6X protection in accordance with IEC/EN 60529.
SITRANS TH320/TH420/TR320/TR420/TF320/TF420
Compact Operating Instructions, 03/2018, A5E41865021-AA 19
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