AS/NZS 61779.2:2000

1 - AS/NZS 61779.2:2000 ELECTRICAL APPARATUS FOR THE DETECTION AND MEASUREMENT OF FLAMMABLE GASES - PERFORMANCE REQUIREMENTS FOR...
4 - PREFACE
5 - CONTENTS
7 - 1 Scope
7 - 2 Definitions
7 - 3 General requirements
7 - 4 Performance requirements
7 - 4.1 General
7 - 4.2 Unpowered storage
8 - 4.3 Calibration curve (not applicable to alarm-only apparatus)
8 - 4.4 Stability (continuous duty apparatus)
8 - 4.5 Stability (spot-reading apparatus)
8 - 4.6 Alarm
8 - 4.7 Temperature
8 - 4.8 Pressure
8 - 4.9 Humidity
8 - 4.10 Air velocity
9 - 4.11 Flow rate
9 - 4.12 Orientation
9 - 4.13 Vibration
9 - 4.14 Drop test (applicable to portable apparatus and remote sensors)
9 - 4.15 Warm-up time (not applicable to spot-reading apparatus)
9 - 4.15.1 Fixed and transportable apparatus
9 - 4.15.2 Continuous duty portable apparatus
9 - 4.16 Time of response (not applicable to spot-reading apparatus)
9 - 4.17 Minimum time to operate (spot-reading apparatus)
10 - 4.18 High gas concentrations above the measuring range
10 - 4.18.1 Non-ambiguity test
10 - 4.18.2 Residual effect test
10 - 4.19 Battery capacity
10 - 4.19.1 Battery-powered portable continuous duty apparatus
10 - 4.19.2 Battery-powered portable spot-reading apparatus
10 - 4.20 Power supply variations
10 - 4.20.1 General
10 - 4.20.2 AC and external d.c. powered apparatus
10 - 4.20.3 Other power supply ranges
10 - 4.21 Power supply interruptions, voltage transients and step changes of voltage
10 - 4.22 Addition of sampling probe
11 - 4.23 Dust
11 - 4.24 Poisons and other gases
11 - 4.24.1 Poisons
11 - 4.24.2 Other gases
11 - 4.25 Electromagnetic compatibility
11 - 5 Field calibration kit

Specifies requirements for group I (as defined in part 1) portable, transportable and 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 firedamp. The requirements and test methods applicable to the apparatus covered by This Standard are specified in part 1. This Standard is restricted to apparatus intended for the detection and measurements of volume ratios of methane in air from a volume fraction of 0 percent up to, but not exceeding, a volume fraction of 5 percent.

This part of AS/NZS 61779 specifies requirements for group I (as defined in part 1) portable, transportable and 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 firedamp. The requirements and test methods applicable to the apparatus covered by this standard are specified in part 1.NOTE - The use of group 1 apparatus may not be permitted without the additional and prior approval of the relevant authority in mines under its jurisdiction, see note 1 of 1.1.1 of part 1.This standard is restricted to apparatus intended for the detection and measurement of volume ratios of methane in air from a volume fraction of 0% up to, but not exceeding, a volume fraction of 5%.

First published as part of AS 1827-1975.
Revised and redesignated as AS 2275.1-1979.
AS 2275.2 first published 1979.
AS 2275.1-1979 and AS 2275.2-1979 jointly revised, amalgamated and redesignated in part as AS/NZS 61779.2:2000.