Model Designations and Specifications UMSITRPDS3-1
November 2005
9-36
Installation in Zone 0
The installation must be adequately sealed (IP67 to EN 60 529). An industry standard (e.g. DIN, NPT)
threaded joint is suitable, for example.
When operating with intrinsically safe power supply units of the “ia” category, the explosion protection
does not depend on the chemical resistance of the seal diaphragm.
When operating with intrinsically safe power supply units of the “ib” category or for units with explosion
proof protection “Ex d” and simultaneous use in zone 0, the explosion protection of the transmitter
depends on chemical resistance of the diaphragm. Under these operating conditions, the transmitter may
be used only for those inflammable gases and liquids to which the diaphragms are adequately chemically
resistant to avoid corrosion.
WARNING
Explosion can cause death or serious injury.
Failure to observe the following precautions could result
in an explosion hazard.
Comply with the specifications of the examination certificate valid in your country.
Comply with your country’s laws and regulations that apply to electrical installation in an explosive
environment.
Be sure that the available power supply complies with the specifications on the transmitter rating plate
and statements in the examination certificate in your country. Dust-proof protection caps in the cable
inlets must be replaced by suitable screw-type gland or dummy plugs that must be appropriately certified
for transmitters with explosion proof type of protection.
9.6.1 CSA Hazardous Locations Precautions
This section provides CSA hazardous location precautions that should be observed by the user when
installing or servicing the equipment described in this manual. These statements supplement those given
in the preceding section.
WARNING
Explosion can cause death or serious injury.
Failure to observe the following precautions could result
in an explosion hazard.
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