This regulation is applicable to the initial verification, subsequent verification and in-use inspection of alarmer detectors of combustible gas (including the combustible gas detector, hereinafter referred to as "instrument") used in the operating environment rather than mine.
Introduction I
1 Scope
2 Overview
3 Metrological Performance Requirements
4 General Technical Requirements
4.1 Appearance and Structure
4.2 Sign and Marking
4.3 Power-on Inspection
4.4 Alarm Function and Alarm Operation Value Inspection
4.5 Insulation Resistance
5 Measuring Instrument Control
5.1 Verification Conditions
5.2 Verification Items
5.3 Verification Methods
5.4 Processing of Verification Result
5.5 Verification Period
Appendix A Format of Verification Record
Appendix B Inside Page Format of Verification Certificate / Verification Result Notice
Appendix C Explosive Limit of Common Flammable Gas
This regulation is applicable to the initial verification, subsequent verification and in-use inspection of alarmer detectors of combustible gas (including the combustible gas detector, hereinafter referred to as "instrument") used in the operating environment rather than mine.
Contents of JJG 693-2011/XG1-2011
Introduction I
1 Scope
2 Overview
3 Metrological Performance Requirements
4 General Technical Requirements
4.1 Appearance and Structure
4.2 Sign and Marking
4.3 Power-on Inspection
4.4 Alarm Function and Alarm Operation Value Inspection
4.5 Insulation Resistance
5 Measuring Instrument Control
5.1 Verification Conditions
5.2 Verification Items
5.3 Verification Methods
5.4 Processing of Verification Result
5.5 Verification Period
Appendix A Format of Verification Record
Appendix B Inside Page Format of Verification Certificate / Verification Result Notice
Appendix C Explosive Limit of Common Flammable Gas
