Terms Used InThis Instruction Manual
ATEX
Directive 2014/34/EU, commonly called the
in potentially explosive atmospheres.
sold into and/or installed and operated in the
European Union (EU).
Containment System
-
source of release into the Ex d enclosure.
Division 2
gases are not likely to exist under normal
operating conditions (similiar to Zone 2).
Explosive Gas Atmosphere
of gas or vapor with air under atmospher-
ic conditions, which after ignition permits
Flammable Gas or Vapor
Gas or vapor which, when mixed with air in
certain proportions, will form an explosive gas
in the X-STREAM gas analyzers inside the con-
Infallible Containment
This term is derived from the standards of
explosion protection especially from the re-
quirements for pressurized housings: thus an
of the analyzer housing.
Lower Explosion Limit (LEL)
which an explosive gas atmosphere will not
Lower Flammable Limit (LFL)
-
Protection Class IP66 / NEMA 4X
Both terms are used to specify conditions for
IP -
(6. = dust tight
liquids (.6 = heavy seas).
NEMA stands for National Electrical Manu-
facturers Association. 4X
of protection to personnel against incidental
contact with the enclosed equipment; to pro-
vide a degree of protection against falling dirt,
water, and hose-directed water; and that will
ice on the enclosure.
Upper Explosion Limit (UEL)
which an explosive gas atmosphere will not
Zone 1
gases can exist some of the time under nor-
mal operating conditions.
(A guideline value [not part of a standard] is
10 to 1.000 hours per year.)
Zone 2
gases are not likely to exist under normal
operating conditions.
(A guideline value [not part of a standard ] is
less than 10 hours per year.)
