UNE EN 50057:1999被替代
Electrical Apparatus For The Detection And Measurement Of Combustible Gases - Performance Requirements For Group 2 Apparatus Indicating Up To 100% Lower Explosive Limit
出版：Asociacion Espanola de Normalizacion
专家解读视频
Describes performance requirements for Group II (as defined in European Standard EN 50054) portable, transportable and fixed apparatus for detection and measurement of combustible gas or vapour concentrations with air. The apparatus, or parts thereof, may be used in potentially explosive atmospheres, other than mines susceptible to firedamp (ie. Group I). General requirements and test methods applicable to apparatus covered by this European Standard are given in EN 50054. Limited to apparatus intended for detection and measurement of combustible gas or vapour concentrations with air up to 100% lower explosive limit (LEL).
SS EN 50057 Ed. 2 (1998) - Identical
I.S. EN 50057:1998 - Identical
NF EN 50057:1992 - Identical
DIN EN 50057 (1999-07) - Identical
BS EN 50057:1999 - Identical
