GB/T 7247.2-2024 English PDFUS$1034.00 · In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 7247.2-2024: Safety of laser products - Part 2: Safety of optical fibre communication systems (OFCSs) Status: Valid GB/T 7247.2: Historical versions
Basic dataStandard ID: GB/T 7247.2-2024 (GB/T7247.2-2024)Description (Translated English): Safety of laser products - Part 2: Safety of optical fibre communication systems (OFCSs) Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: L51 Classification of International Standard: 31.260 Word Count Estimation: 52,599 Date of Issue: 2024-08-23 Date of Implementation: 2024-08-23 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 7247.2-2024: Safety of laser products - Part 2: Safety of optical fibre communication systems (OFCSs)---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. ICS 31.260 CCSL51 National Standard of the People's Republic of China Replaces GB/T 7247.2-2018 Laser Product Safety Part 2.Safety of optical fibre communication systems (OFCS) (IEC 60825-2.2021, IDT) Released on 2024-08-23 2025-03-01 Implementation State Administration for Market Regulation The National Standardization Administration issued Table of ContentsPreface III Introduction V 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Requirements 4 4.1 Basic Requirements 4 4.2 OFCS protective cover 4 4.3 Optical Cable 4 4.4 Optical cable connector 4 4.5 Marking and identification 5 4.6 Requirements for institutions 9 4.7 Assessment of hazard level 10 4.8 Automatic Power Reduction (APR) 13 4.9 Hazard level requirements for location types 14 Appendix A (Informative) Scope of application 16 Appendix B (Informative) Explanation of the meaning of "hazard level" 17 B.1 Overview 17 B.2 Category 17 B.3 Hazard Level 17 B.4 Comments on 4.7 17 B.5 Comments on D.5 18 Appendix C (Informative) Hazard/Safety Analysis Methods 19 Appendix D (Informative) Application Guidelines for Safe Use of OFCS 20 D.1 Overview 20 D.2 Application area 20 D.3 OFCS power limit 21 D.4 Hazard level assessment example 23 D.5 Fault Analysis --- Instructions and Guidance 33 D.6 Recommended working practices34 D.7 Maximum output power when power is off 36 Appendix E (Informative) Inspection and Maintenance Guide 38 E.1 Testing and Measurement 38 E.2 Safety precautions 38 References 40 Figure D.1 PON (Passive Optical Network) System 32 Table 1 Identification of non-restricted locations 6 Table 2 Identification of restricted locations 6 Table 3 Identification of controlled locations 7 Table 4 Measurement aperture diameters and measurement distances for (simplified) evaluation 10 Table 5 Requirements for each location in the optical fiber communication system (OFCS) 15 Table D.1 Single-mode (SM) optical fiber with 11 μm mode field diameter (MFD) and multimode (MM) optical fiber with 0.18 numerical aperture (core diameter 50 μm) Power limit of OFCS22 Table D.2 Correspondence between the number of optical fiber cores and the maximum allowable power in a ribbon optical fiber (example) 31 Table D.3 Example of power limits for an OFCS system that automatically reduces transmit power to a low hazard level through APR36ForewordThis document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is Part 2 of GB/T 7247 Safety of Laser Products. GB/T 7247 has published the following parts. --- Part 1.Equipment classification and requirements; --- Part 2.Safety of optical fiber communication systems (OFCS); --- Part 3.Guidelines for laser shows and performances; --- Part 4.Laser protection screens; --- Part 5.Producer's checklist for GB/T 7247.1; --- Part 9.Maximum permissible exposure to incoherent optical radiation; --- Part 13.Classification and measurement of laser products; --- Part 14.User Guide. This document replaces GB/T 7247.2-2018 "Safety of Laser Products Part 2.Safety of Optical Fiber Communication Systems (OFCS)" and Compared with GB/T 7247.2-2018, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application of this document has been expanded (see Chapter 1); b) Changed the definitions of terms. accessible position, automatic power reduction, hazard level 1, hazard level 1M, hazard level 2, hazard level 2M, 3R Class 3 hazard, Class 3B hazard, Class 4 hazard, manufacturers and optical fiber communication systems (see 3.1, 3.2, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.16 and 3.18 of the.2018 edition; 3.1, 3.2, 3.5, 3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.16 and 3.18 of the.2018 edition); c) Changed the name of the term. Reasonably foreseeable event (see 3.19, 3.19 of the.2018 edition); d) Added the requirement to assess the hazard level according to the type of optical cable (see 4.1); e) The requirements for restricted positions and controlled positions have been changed (see 4.4.3 and 4.4.4, 4.4.2 and 4.4.3 of the.2018 edition); f) The content of marking and identification has been changed (see 4.5.1, 4.6.1 of the.2018 edition); g) Added the requirement that when the breakpoint’s achievable emission hazard level is level 1 or level 1M, it is allowed to be indicated in the user information (See Table 3); h) The determination of hazard level based on condition 2 has been changed (see 4.7.1, 4.8.1 of the.2018 edition); i) Added the hazard level identification method for OFCS (see 4.7.2); j) The requirements for brief accessible exposure when using APR have been changed (see 4.7.4, 4.8.2 of the.2018 edition). This document is equivalent to IEC 60825-2.2021 "Safety of Laser Products Part 2.Safety of Optical Fiber Communication Systems (OFCS)". The following minimal editorial changes were made to this document. --- Incorporated the revised contents of IEC 60825-2.2021/COR1.2021, and the outer margins of the relevant clauses are marked with Vertical double lines (‖) are marked. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Machinery Industry Federation. This document is under the jurisdiction of the National Technical Committee on Optical Radiation Safety and Laser Equipment Standardization (SAC/TC284). This document was drafted by. Wuhan Accelink Technologies Co., Ltd., China National Institute of Metrology, China Electronics Technology Group Corporation No. First Institute, Aerospace Information Innovation Institute of the Chinese Academy of Sciences, Beijing Jingyi Optoelectronics Technology Research Institute Co., Ltd., Zhijiang Laboratory, China Telecom Beijing Research Institute of Nokia Corporation, Institute of Semiconductors, Chinese Academy of Sciences, Shanghai Nokia Bell Co., Ltd., Suzhou Sutuo Communication Technology Co., Ltd. Technology Co., Ltd. The main drafters of this document are. Jiang Yi, Song Mengyang, Deng Yuqiang, Qi Yan, Wu Aiping, Lu Yaodong, Wang Zhongxin, Gong Yadong, Xie Liang, He Jinlin, Xu Zhuyong, Yang Xuebo, Bai Fang. This document was first published in.2018 and this is the first revision.IntroductionGB/T 7247 is intended to consist of the following parts. --- Part 1.Equipment classification and requirements. Due to the wide range of wavelength, energy and pulse characteristics of laser beams, When using laser products, the degree of potential hazard varies greatly, and it is not possible to simply classify laser products using uniform safety limits. The classification system of the degree of optical radiation hazards of lasers and laser products is evaluated and control measures are determined. --- Part 2.Safety of optical fiber communication systems (OFCS). Based on the safety of reasonably foreseeable fault conditions [such as cable break, optical fiber The level is divided according to the degree of exposure to optical radiation in the case of loose fiber connectors, etc. The corresponding hazard level of accessible locations is specified based on the characteristics of the accessible locations to determine the equivalent safety protection measures. --- Part 3.Guidelines for laser shows and performances. For 3B and 4 lasers used in similar venues such as theatre projections and stage performances. For optical products, any possible occurrence during laser operation that exceeds the maximum permissible exposure that may cause biological effects and hazards to human eyes and skin. The MPE analysis is given to clarify the responsibilities of on-site design, installation, operation and performance personnel, as well as risk control and evaluation. Estimate to reduce risk. --- Part 4.Laser protection screen. Aims to specify permanent and temporary (such as maintenance) enclosures used to enclose the working area of the laser processing machine. During maintenance) laser protection screens, as well as technical requirements for dedicated laser protection screens to prevent people around the processing area from being excited Hazards of optical radiation. --- Part 5.Producer's checklist for GB/T 7247.1.Aims to provide a reference inspection procedure to ensure Verify whether the product meets the classification and requirements of GB/T 7247.1 for equipment, and enhance the enforceability and Operability. --- Part 8.Guidelines for the safe use of lasers on the human body. Aims to guide how to incorporate the safe use of lasers into medical laser practice. Practice, establish safety procedures, preventive measures and user control measures, strengthen the establishment of a system for all personnel involved in the use of lasers The necessity of safety framework system and training. --- Part 9.Maximum permissible exposure to incoherent optical radiation. This is intended to provide the maximum permissible exposure to artificial light sources with a wavelength of 180nm to 3000nm. MPE limits for controlling optical radiation exposure to eyes and skin. --- Part 12.Safety of free space optical communication systems (FSOCSs) for information transmission. Aims to give 180nm~ Guidelines for the manufacture of laser products and systems for point-to-point or point-to-multipoint free-space optical data transmission in the 1 mm wavelength range South, as well as safe use requirements to protect people from the potentially hazardous optical radiation generated by FSOCSs. --- Part 13.Classification measurement of laser products. Aims to give the emission level of laser output energy according to GB/T 7247.1 Measurement and analysis methods give guidance on the classification of laser products. --- Part 14.User Guide. It puts forward requirements for users to use laser products exceeding Class 1 and Class 2, aiming to help users Product users and their manufacturers understand the general principles of safety management, identify possible hazards, assess the severity of potential hazards, establish and Provide appropriate control measures. --- Part 17.Safety of passive optical components and cables used in high optical power optical fiber communication systems. For high optical powers above Class 3B operating in the system, safety precautions for thermal effects, optomechanical effects and related effects are given. To prevent other safety problems to connectors, etc. --- Part 18.Transmission system guide. Aims to specify the requirements for the arrangement, installation and use of light guide systems, including free space lasers Transmission and fiber optic transmission, protective measures implemented to protect personnel from laser radiation hazards, and risk assessment methods. --- Part 19.Mobile platform laser products. This is intended to provide laser products mounted on mobile platforms based on the movement of the platform. The velocity-dependent closest achievable position (VCPHA) is used to assess laser hazards to avoid over-reaching while ensuring safety. The laser hazard is rigorously evaluated and precautions for applying this condition are given. --- Part 20.Laser radiation safety requirements for products intended to expose the eyes or face. Intended to consider direct exposure to the face or eye area Consumer Class 1 laser products (such as facial or retina/iris recognition, AR/VR/MR glasses/headsets, etc.) may Failure mode, using the FMEA method with a focus on safety, provides risk-based analysis requirements to reduce the risk of failure in products. The risk of potential damage to the eyes and face due to failure that may occur at any time during the expected service life. --- Part 21.Automatic emission control (AEC). Aims to address the issues that manufacturers may encounter when incorporating automatic emission control (AEC) into their laser products. In order to reduce the hazards of light radiation and produce better performance products without protection. The objectives of this study are to provide better guidance on the performance requirements of an instrument and the methods that can be used to determine its hazard classification and to verify that it is operating as intended. Laser Product Safety Part 2.Safety of optical fibre communication systems (OFCS)1 ScopeThis document specifies requirements and specific guidelines for the safe operation and maintenance of optical fiber communication systems (OFCS). beyond the range of the transmitting device and/or extending to a location far away from the light source. This document requires an assessment of the hazard level of each accessible location in the OFCS rather than a classification of the product as per IEC 60825-1. This document applies to engineered end-to-end assemblies installed in OFCS for transmitting, transmitting and receiving signals from lasers, light emitting diodes, The light radiation generated by a diode (LED) or optical amplifier is transmitted via optical fiber to achieve the purpose of communication or control. NOTE 1.“Lasers” mentioned in this document include light emitting diodes (LEDs) and optical amplifiers. This document applies to components and assemblies intended to be installed in OFCS. Components and assemblies that are independent laser products comply with Relevant clauses of IEC 60825-1. This document is not applicable to optical fiber systems intended for the transmission of laser power, such as equipment used in materials processing or medical applications. In addition to the danger of laser radiation, OFCS may also cause other dangers such as fire. This document does not address safety issues such as explosion or fire of OFCS in explosive atmospheres. Note 2.The optical radiation hazard generated by optical fiber depends on the wavelength and power of the light and the optical properties of the optical fiber, see Appendix A.2 Normative referencesThe contents of the following documents constitute essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document.3 Terms and definitionsFor the purposes of this document, the terms and definitions defined in IEC 60825-1 and the following apply. 3.1 accessiblelocation Parts or locations of an OFCS that are accessible to laser radiation without the use of tools under reasonably foreseeable conditions. 3.2 Whenever an incident occurs in which a person is exposed to radiation, OFCS reduces the accessible optical power to a certain level within a specified time. to the specified level of characteristics. NOTE 1 The term "automatic power reduction (APR)" used in this document includes the following terminology used in the International Telecommunication Organization (ITU-T) standard G.664. ---Automatic power reduction (APR); ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 7247.2-2024_English be delivered?Answer: Upon your order, we will start to translate GB/T 7247.2-2024_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 7247.2-2024_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 7247.2-2024_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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