Siemens 7MF4033 series, Руководство пользователя

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Model Designations and Specifications UMSITRPDS3-1
November 2010
9-36
9.9 HAZARDOUS AREA CLASSIFICATION
Table 9-20 lists the hazardous area classifications available at the time this manual was printed. Contact
your local Siemens representative or the factory for the latest classifications.
CE Approval - A Declaration of Conformity can be found on a later page in this section.
Intrinsically Safe Operation in a Hazardous Area
Operation is permitted only with circuits that are certified as intrinsically safe. The transmitter complies
with Category 1/2 and it may be installed in zone 0.
The EU type examination certificate applies to installation on the walls of containers and pipes that may
contain explosive gas/air or vapor/air mixtures only under atmospheric conditions (pressure: 12 psi to 16
psi, temperature: -20°C to +60°C (-4°F to +140°F)). The permissible ambient temperature range is -40°C
to +85°C (-40°F to +185°F), in explosion hazard areas (for T4) -40°C to +85°C (-40°F to +185°F).
The user may also apply the device in non-atmospheric conditions outside the limits set in the EC-Type
Examination Certificate, according to the conditions for use (explosive mixture) and if the required
additional security measures have been met. The limit values stated earlier in this section must be
observed in any case.
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.