1. This part of the scope GB 7957 specifies the performance and other safety characteristics of mining lamps, including the performance of mining lamps with connection points with other equipment. The miner's lamp that complies with this section is also applicable to gas free coal mines. If this section is used as an "independent" document for gas free coal mines, the supplier and user should negotiate and determine the relevant structural requirements, and if possible, comply with the provisions of GB7957.1. 2. The clauses in the following documents are referred to as clauses in this part of GB7957 through normative references. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions do not apply to this section. However, parties to agreements based on this section are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this section. GB/T 15766.3-2007 Small lamps (IEC 60983:2005, 1DT) IEC 62013-12005 Mining lamps for gas environments - Part 1: General requirements, structures, and explosion-proof tests 3. Terms and definitions The following terms and definitions apply to this part of GB 7957. 3.1 Effective working period The main light source of a miner's lamp continuously uses the working current specified by the manufacturer and meets the minimum luminous intensity requirements of this part, measured in hours. 4. Overview: Mineral lamps should be designed based on excellent engineering practices. It should match the purpose and provide sufficient lighting for users during effective working hours
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
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1. Telephone communication and confirmation of requirements
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1. The testing industry is fully covered, meeting different testing needs
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4. Free initial testing, with no testing fees charged
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