EN 50054:1998

1 Scope
2 Definitions
3 General requirements
3.1 Introduction
3.2 Construction
3.2.1 General
3.2.2 Indicating devices
3.2.3 Alarm or output functions
3.2.4 Fault signals
3.2.5 Adjustments
3.2.6 Battery-powered apparatus
3.3 Labelling and marking
3.3.1 General
3.3.2 Identification of the calibration gas Group II apparatus
3.4 Instruction manual
4 Test requirements
4.1 Introduction
4.2 General requirements for tests
4.2.1 Samples and sequence of tests
4.2.2 Preparations of apparatus before testing
4.2.3 Mask for calibrations and tests
4.3 Normal conditions for test
4.3.1 General
4.3.2 Test gases
4.3.3 Standard test gas
4.3.4 Flow rate for test gases
4.3.5 Voltage
4.3.6 Ambient temperature
4.3.7 Pressure
4.3.8 Humidity
4.3.9 Stabilization time
4.3.10 Orientation
4.4 Test methods
4.4.1 General
4.4.2 Unpowered storage
4.4.3 Calibration and adjustment
4.4.4 Drift (continuous duty apparatus)
4.4.5 Drift (spot-reading apparatus)
4.4.6 Alarm set point(s)
4.4.7 Temperature
4.4.8 Pressure
4.4.9 Humidity
4.4.10 Air speed
4.4.11 Pumping rate
4.4.12 Orientation
4.4.13 Vibration (applicable to Group I machine-mounted
        apparatus and to Group II fixed and transportable
        apparatus)
4.4.14 Drop test (applicable to portable apparatus and remote
        sensors)
4.4.15 Warm-up time (not applicable to spot-reading apparatus)
4.4.16 Time of response (not applicable to spot-reading
        apparatus)
4.4.17 Minimum time of operation (spot-reading apparatus)
4.4.18 High gas concentrations above the measuring range
4.4.19 Battery capacity
4.4.20 Power supply variations
4.4.21 Power supply interruptions, voltage transients and step
        changes of voltage
4.4.22 Addition of sampling probe
4.4.23 Dust (applicable to Group I apparatus only)
4.4.24 Poisons and other gases
4.4.25 Electromagnetic immunity
5 Field calibration kit
Annexes
A Flammability limits (i.e. LEL and UEL) of some flammable
        gases and vapours
B Determination of time of response
C Breathing and draining devices which form part of a
        flameproof enclosure
D Tests of flameproof enclosures with breathing and
        draining devices
E Additional requirements for crimped ribbon elements of
        breathing and draining devices
F Additional requirements for elements, with
        non-measurable paths, of breathing and draining devices