BS EN 50055:1999
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Electrical apparatus for the detection and measurement of combustible gases. Performance requirements for Group I apparatus indicating up to 5 % (V/V) methane in air
Hardcopy , PDF
15-09-2000
English
15-05-1999
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 (applicable only to machine-mounted
apparatus)
5.14 Drop test (applicable to portable apparatus and
remote sensors)
5.15 Warm-up time (not applicable to spot-reading
apparatus)
5.15.1 Fixed and transportable apparatus
5.15.2 Continuous duty transportable 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
5.18.1 Non-ambiguity test
5.18.2 Residual effect
5.19 Battery capacity
5.19.1 Battery-powered portable continuous duty
apparatus
5.19.2 Portable spot-reading apparatus
5.20 Power supply variations
5.20.1 A.C. powered apparatus
5.20.2 External d.c. powered apparatus
5.20.3 Battery powered apparatus
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 Information for use
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