IEC 62013-2-2005 pdf – Caplights for use in mines susceptible to firedamp – Part 2: Performance and other safety- related matters

IEC 62013-2-2005 pdf – Caplights for use in mines susceptible to firedamp – Part 2: Performance and other safety- related matters.
1 Scope This part of IEC 62013 details those performance and other safety features of caplights, including those with a point of connection for another apparatus, not covered in IEC 62013-1, but which are important for the safety and working conditions of the user. It may also be applied to caplights for use in mines not likely to be endangered by firedamp. When this part of the standard is used as a “stand-alone” document for non-gassy mines, any relevant constructional requirements should be the subject of agreement between the supplier and the user and, where possible, be as described in IEC 62013-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050(845):1987, International Electrotechnical Vocabulary (IEV) – Chapter 845: Lighting IEC 60983:1995, Miniature lamps IEC 62013-1:, Caplights for use in mines susceptible to firedamp – Part 1: General require- ments – Construction and testing in relation to the risk of explosion 1 ISO 1000, SI units and recommendations for the use of their multiples and of certain other units 3 Terms and definitions For the purposes of this document, the definitions of ISO 1000 and IEC 60050(845) and the following apply: 3.1 useful working period period in hours during which the main light source of the caplight may be continuously used with the current drain specified by the manufacturer and comply with the minimum luminous intensity requirements of this standard 4 General The caplight shall be designed in accordance with good engineering practice. It shall be fit for purpose and shall provide sufficient light for the user throughout the duration of the working period specified by the manufacturer.
5 Light output 5.1 Light sources 5.1.1 Every headpiece shall have a minimum of two light sources, at least one of which shall be the main source and meet the requirements of this part of IEC 62013. A single light source may be used if it is a non-filament type and has a lamp life of at least 5 000 h according to 8.2 and be replaced at an interval not exceeding two thirds of its nominal life. 5.1.2 Where a caplight is fitted with two lamps or filaments, each of which is capable of being the main source, the manufacturer shall designate which of these shall be the main source and which the auxiliary source; otherwise, both sources shall meet the requirements for the main source. 5.1.3 Filament lamps for main and auxiliary sources shall comply with IEC 60983. Where the relevant data sheet is not given in IEC 60983, an equivalent shall be provided by the caplight manufacturer. 5.2 Light source holder The holder for the main light source shall be capable of locating and retaining it securely in a focused position with respect to the reflector profile in accordance with 5.5. 5.3 Luminous intensity The luminous intensity from the main light source in a fully assembled headpiece in its normal orientation at the end of the useful working period shall extend a cone with a minimum of 1 cd. This cone shall not be less than 30 degrees vertically upwards, 60 degrees vertically downwards and 45 degrees horizontally each side. This may be calculated from manufacturers’ data or tested in accordance with 8.1.
6.2 Battery life (charge/discharge cycles) It is not possible to specify a cyclic life for the battery due to the multiplicity of battery types, charging regimes and conditions of use. It is therefore important that the manufacturer provides instructions to the user on the recharge time and routine checks which are necessary to ensure that the battery is capable of performing its intended duties during the actual working period. See Clause 9 and Annex A. NOTE The choice of battery charging equipment will depend on the time available between successive actual working periods. When the recharge time is insufficient to fully recharge the battery, the manufacturer may need to advise the user to provide additional caplights. 6.3 Caplight useful working period The manufacturer shall declare the useful working period of the caplight when new, taking into account the current drawn by the main light source and, if appropriate, the average current drawn by any accessories during that period. The test requirements are given in 8.1. 6.4 Durability 6.4.1 Fasteners and connectors Fasteners and connectors shall be designed so that they do not loosen in normal use. 6.4.2 Resistance to abrasion The caplight shall be constructed from materials which are resistant to abrasion in normal use. 6.4.3 Operability after mechanical tests Following completion of the drop tests described in 10.3 of IEC 62013-1, at least one light source shall still be operable and there shall be no leakage of electrolyte. 7 Ergonomics 7.1 Mass Unless otherwise agreed between the manufacturer and the user, the mass of the battery and container shall not exceed 2 750 g and the total mass of the complete caplight assembly shall not exceed 3 250 g. 7.2 Ease of operation The switch shall be easily accessible to the wearer with the caplight in the position normally worn.