SIS SS-EN 50 055-1992
Electrical apparatusfor the detection and measurement ofcombustible gases - Performance requirements for Group I apparatus indicating upto5% (v/v) methane in air

Standard No.

SIS SS-EN 50 055-1992

Release Date

1992

Published By

SE-SIS

Latest

SIS SS-EN 50 055-1992

Scope

1.1 This European Standard specifies performance requirements for Group I (as defined in European Standard EN 50 054) portable, transportable ar.d fixed apparatus for the detection and measurement of methane concentrations in mine air. The apparatus, or parts thereof, are intended for use in mines susceptible to firedamps and shall meet the general requirements and test methods specified in European Standard EN 50 054. NOTE. The use of Group I apparatus may not be permitted without the additional and prior approval of the relevant authority in mines under its jurisdiction, see Note 1 under clause 1.1 of European Standard EN 50 054. 1.2 This European Standard is restricted to apparatus intended for i.he detection and measurement of methane volurae ratios in air from 0 % (v/v) up to but not exceeding 5 % (v/v).

SIS SS-EN 50 055-1992 history

• 1992 SIS SS-EN 50 055-1992 Electrical apparatusfor the detection and measurement ofcombustible gases - Performance requirements for Group I apparatus indicating upto5% (v/v) methane in air