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GB/T 7247.1-2024: Safety of laser products - Part 1: Equipment classification and requirements Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 7247.1: Historical versions
Similar standardsGB/T 7247.1-2024: Safety of laser products - Part 1: Equipment classification and requirements---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT7247.1-2024GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 31.260 CCS L 51 GB/T 7247.1-2024 / IEC 60825-1.2014 Replacing GB 7247.1-2012 Safety of Laser Products – Part 1.Equipment Classification and Requirements (IEC 60825-1.2014, IDT) Issued on: SEPTEMBER 29, 2024 Implemented on: APRIL 1, 2025 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 4 Introduction... 7 1 Scope... 10 2 Normative References... 12 3 Terms and Definitions... 12 4 Classification Principles... 30 4.1 General... 30 4.2 Classification responsibilities... 30 4.3 Classification rules... 30 4.4 Laser products designed to function as conventional lamps... 37 5 Determination of the Accessible Emission Level and Product Classification... 38 5.1 Tests... 38 5.2 Measurement of laser radiation... 39 5.3 Determination of the class of the laser product... 40 5.4 Measurement geometry... 52 6 Engineering Specifications... 57 6.1 General remarks and modifications... 57 6.2 Protective housing... 58 6.3 Access panels and safety interlocks... 58 6.4 Remote interlock connector... 60 6.5 Manual reset... 60 6.6 Key control... 60 6.7 Laser radiation emission warning... 60 6.8 Beam stop or attenuator... 61 6.9 Controls... 61 6.10 Viewing optics... 61 6.11 Scanning safeguard... 61 6.12 Safeguard for Class 1C products... 62 6.13 "Walk-in" access... 62 6.14 Environmental conditions... 62 6.15 Protection against other hazards... 63 6.16 Power limiting circuit... 63 7 Labelling... 64 7.1 General... 64 7.2 Class 1 and Class 1M... 66 7.3 Class 1C... 67 7.4 Class 2 and Class 2M... 68 7.5 Class 3R... 69 7.6 Class 3B... 70 7.7 Class 4... 70 7.8 Aperture label... 71 7.9 Radiation output and standards information... 71 7.10 Labels for access panels... 72 7.11 Warning for invisible laser radiation... 73 7.12 Warning for visible laser radiation... 74 7.13 Warning for potential hazard to the skin or anterior parts of the eye... 74 8 Other Informational Requirements... 74 8.1 Information for the user... 74 8.2 Purchasing and servicing information... 76 9 Additional Requirements for Specific Laser Products... 77 9.1 Other parts of the standard series IEC 60825... 77 9.2 Medical laser products... 78 9.3 Laser processing machines... 78 9.4 Electric toys... 78 9.5 Consumer electronic products... 78 Annex A (Informative) Maximum Permissible Exposure Values... 79 A.1 General remarks... 79 A.2 Limiting apertures... 84 A.3 Repetitively pulsed or modulated lasers... 85 A.4 Measurement conditions... 87 A.5 Extended source lasers... 88 Annex B (Informative) Examples of Calculations... 89 B.1 Symbols used in the examples of this annex... 89 B.2 Classification of a laser product – Introduction... 90 B.3 Examples... 94 Annex C (Informative) Description of the Classes and Potentially Associated Hazards 100 C.1 General... 100 C.2 Description of classes... 100 C.3 Limitations of the classification scheme... 105 C.4 References... 106 Annex D (Informative) Biophysical Considerations... 107 D.1 Anatomy of the eye... 107 D.2 The effects of laser radiation on biological tissue... 108 D.3 MPEs and irradiance averaging...115 D.4 Reference documents...115 Annex E (Informative) MPEs and AELs Expressed as Radiance... 117 E.1 Background...117 E.2 Radiance values...117 E.3 Rationale...118 Annex F (Informative) Summary Tables... 121 Annex G (Informative) Overview of Associated Parts of IEC 60825... 124 Annex NA (Informative) Interpretation of Relevant Parts of IEC 60825... 126 NA.1 Interpretation sheet 1... 126 NA.2 Interpretation sheet 2... 133 Bibliography... 135ForewordThis Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents. This Document is Part 1 of GB/T 7247 Safety of Laser Products. GB/T 7247 consists of the following parts. --- Part 1.Equipment classification and requirements; --- Part 2.Safety of optical fiber communication systems (OFCS); --- Part 3.Guidance for laser display and shows; --- Part 4.Laser shields; --- Part 5.Manufacturer’s checklist for GB/T 7247.1; --- Part 9.Maximum allowable exposure to incoherent optical radiation; --- Part 13.Measurements for classification of laser products; --- Part 14.A users guide. This Document replaces GB 7247.1-2012 Safety of Laser Products – Part 1.Equipment Classification and Requirements. Compared with GB 7247.1-2012, this Document has the major technical changes as follows besides the structural adjustments and editorial modifications. --- Add the provisions on the applicability of vacuum ultraviolet wavelength, temporary visual impairment caused by laser radiation, and laser products designed for traditional lighting (see Clause 1 of this Edition); --- Delete the terms and definitions. α minimum value, protective enclosure (see 3.5 and 3.65 of the 2012 Edition); --- Add the terms and definitions. angle of subtend, Class 1C laser products, contact mode, eye safety (see 3.6, 3.19, 3.27 and 3.37 of this Edition); --- Change the terms and definitions. angular subtense of the apparent source, apparent source, beam diameter, beam divergence, Classes 3R and 3B laser products, Class 4 laser products, demonstration laser products, embedded laser products, emission duration, extended source observation, fail-safe safety interlock, beam internal view, laser hazard zone, maximum angle of subtend, maximum allowable exposure, protective cover (see 3.7, 3.10, 3.13, 3.14, 3.23, 3.24, 3.30, 3.32, 3.33, 3.36, 3.39, 3.42, 3.47, 3.57, 3.59 and 3.68 of this Edition; 3.7, 3.10, 3.13, 3.14, 3.22, 3.23, 3.28, 3.30, 3.33, 3.34, 3.36, 3.39, 3.44, 3.54, 3.56 and 3.66 of the 2012 Edition); --- Change classification to classification rules and change the content (see Clause 4 of this Edition; Clause 8 of the 2012 Edition); --- Change determination of achievable emission levels to determination of achievable emission levels and product classification; and change the content (see Clause 5 of this Edition; Clause 9 of the 2012 Edition); --- Change the requirements to engineering protection requirements and change the content (see Clause 6 of this Edition; Clause 4 of the 2012 Edition); --- Change the marking content (see Clause 7 of this Edition; Clause 5 of the 2012 Edition); --- Change the content of user information (see Clause 8 of this Edition; Clause 6 of the 2012 Edition). This Document equivalently adopts IEC 60825-1.2014 Safety of Laser Products – Part 1. Equipment Classification and Requirements. This Document made the following minimum editorial modifications. --- Incorporate the interpretation contents of IEC 60825-1.2014/ISH1.2017 and IEC 60825- 1.2014/ISH2.2017 as informative appendix NA “Interpretation of Relevant Parts of IEC 60825”. Please note some contents of this Document may involve patents. The issuing agency of this Document shall not assume the responsibility to identify these patents. This Document was proposed by China Machinery Industry Federation. This Document shall be under the jurisdiction of National Technical Committee on Optical Radiation Safety and Laser Equipment of Standardization Administration of China (SAC/TC 284). Drafting organizations of this Document. Aerospace Information Research Institute, Chinese Academy of Sciences; Beijing University of Technology; Norla Institute of Technical Physics; the 11th Research Institute of China Electronics Technology Group Corporation; Beijing TIRT Technology Service Co., Ltd.; National Institute of Metrology, China; Academy of Military Medical Sciences; China Electronics Standardization Institute; Han’s Laser Technology Industry Group Co., Ltd.; Wuhan Huagong Laser Engineering Co., Ltd.; Zhejiang Institute of Medical Device Testing; Zhijiang Lab; Shanghai Hesai Technology Co., Ltd.; and Institute of Biomedical Engineering, Chinese Academy of Medical Sciences. Chief drafting staffs of this Document. Wu Aiping, Chen Hong, Ye Dahua, Qi Yan, Gao Hongwei, Deng Yuqiang, Yang Zaifu, Liu Yunzhu, Zeng Lixia, Zhou Xiaozhuang, Du Kun, Li Min, Ma Yunfeng, Yang Xuebo, Qiao Bo, Meng Ying, Yang Hua, Pu Jiangbo, Cheng Wang, Liao Lifen, Feng Jianguo, and Li Ting. The historical editions replaced by this Document are as follows. --- GB 7247-1987, GB 7247-1995; --- GB 7247.1-2001, GB 7247.1-2012.1 ScopeThis Document is applicable to safety of laser products emitting laser radiation in the wavelength range 180 nm to 1 mm.2 Normative ReferencesThe provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document. GB/T 2900 (all parts) Electrotechnical terminology [IEC 60050 (all parts)] GB/T 30117 (all parts) Photobiological safety of lamps and lamp systems [IEC 62471 (all parts)]3 Terms and DefinitionsFor the purposes of this Document, the terms and definitions given in IEC 60050-845 and the following apply. 3.1 Access panel Part of the protective housing which provides access to laser radiation when removed or displaced. 3.2 Accessible emission Level of radiation determined at a position and with aperture stops or limiting apertures as described in Clause 5.4 Classification PrinciplesClassification of a laser product is based on the determination of the accessible emission level and comparison of that level with the accessible emission limit (AEL) associated with each class.5 Determination of the Accessible Emission Level and Product ClassificationTests shall take into account all errors and statistical uncertainties in the measurement process and increases in emission and degradation in radiation safety with age.6 Engineering SpecificationsLaser products require certain built-in safety features, depending on the class to which they have been assigned by the manufacturer.7 LabellingEach laser product shall carry label(s) in accordance with the requirements of the following clauses.8 Other Informational RequirementsManufacturers of laser products shall provide user instructions or an operation manual that contains all relevant safety information. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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