NF EN 50057 : 1992
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
01-01-2005
12-01-2013
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Superseded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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