Emerson X-STREAM Series Instruction Manual page 22

X-STREAM Non-Incendive
Permitted sample gases
Due to the limitation of use to Zone 2 envi-
ronments only, measuring fl ammable gases
is by default not permitted for non-incendive
analyzers: Standard tubings (containments)
would enable those gases to pass off into the
housing in case of leakages. Together with the
air being present, this would form an explosive
Flammable Gases must be introduced into INFALLIBLE CONTAINMENTS
ONLY, to avoid leakage into internal analyzer housing!
Such containments are provided on request.
1-2
1.2 Application and Principle of Operation
EXPLOSION HAZARD BY FLAMMABLE GASES
mixture. And, as a result of the tight enclosure
and therefore missing exchange with the sur-
rounding atmosphere, the explosive mixture
would be present for long time periods. Thus
the categorization of the internal compart-
ment of the non-incendive X-STREAM ana-
lyzer would be no more according to Zone 2
(Div 2), but Zone 0 (Div 1), requiring special
protection methods!
To enable measuring fl ammable gases with
non-incendive X-STREAM analyzers, Emer-
son Process Management has designed
special, so called Infallible Containments:
These are gas paths, considered to be
„technically tight" due to the construction
( page 1-8). Using infallible containments
properly avoids release of sample gas into
the analyzer, and the formation of internal
explosive atmosphere.
Emerson Process Management GmbH & Co. OHG
Instruction Manual
HASXENE-IM-EX
12/2014