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NF EN 50057 : 1992

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

APPAREILS ELECTRIQUES DE DETECTION ET DE MESURE DES GAS COMBUSTIBLES - PRESCRIPTIONS DE PERFORMANCES DES APPAREILS DU GROUPE II POUVANT INDIQUER JUSQU'A 100% DE LA LIMITE INFERIEURE D'EXPLOSIVITE
Superseded date

01-01-2005

Published date

01-12-2013

Foreword
1 Scope
2 Normative references
3 Definitions
4 General requirements
5 Performance requirements
5.1 General
5.2 Unpowered storage
5.3 Calibration curve (not applicable to alarm-only
      apparatus)
5.4 Drift (continuous duty apparatus)
5.5 Drift (spot reading apparatus)
5.6 Alarm
5.7 Temperature
5.8 Pressure
5.9 Humidity
5.10 Air speed
5.11 Pumping rate
5.12 Orientation
5.13 Vibration (fixed and transportable apparatus)
5.14 Drop test (applicable to portable apparatus and
      remote sensors)
5.15 Warm-up time (not applicable to spot-reading
      apparatus)
5.16 Time of response (not applicable to spot-reading
      apparatus)
5.17 Minimum time of operation (spot-reading apparatus)
5.18 High gas concentrations above the measuring range
5.19 Battery capacity
5.20 Power supply variations
5.21 Power supply interruptions, voltage transients and
      step changes of voltage
5.22 Addition of sampling probe
5.23 Dust
5.24 Poisons and other gases
5.25 Electromagnetic immunity
6 Field calibration kit
7 Field calibration kit

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).

DevelopmentNote
INDICE DE CLASSEMENT: C23557
DocumentType
Standard
PublisherName
Association Francaise de Normalisation
Status
Superseded

Standards Relationship
DIN EN 50057 : 1999 Identical
I.S. EN 50057:1998 Identical
EN 50057:1998 Identical
UNE-EN 50057:1999 Identical
BS EN 50057:1999 Identical

NF EN 50194 : 2000 CORR 1 2000 ELECTRICAL APPARATUS FOR THE DETECTION OF COMBUSTIBLE GASES IN DOMESTIC PREMISES - TEST METHODS AND PERFORMANCE REQUIREMENTS

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