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1、BRITISH STANDARD BS EN 60825-2:1995 IEC 825-2: 1993 Implementing Amendment No. 1, not published separately Safety of laser products Part 2: Safety of optical fibre communication systems The European Standard EN 60825-2:1994 has the status of a British Standard ICS 33.180.01 Licensed Copy: sheffieldu
2、n sheffieldun, na, Thu Nov 09 01:17:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60825-2:1995 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 January 1995
3、 BSI 05-1999 The following BSI references relate to the work on this standard: Committee reference EEL/28 Draft announced in BSI News September 1994 ISBN 0 580 23533 5 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this Europe
4、an Standard was prepared, comprises the national committees of the following countries: AustriaItaly BelgiumLuxembourg DenmarkNetherlands FinlandNorway FrancePortugal GermanySpain GreeceSweden IcelandSwitzerland IrelandUnited Kingdom Amendments issued since publication Amd. No.DateComments 9973May 1
5、998Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:17:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60825-2:1995 BSI 05-1999i Contents Page Cooperating organizations Inside front cover National forewordii Foreword 2 Text of EN 60825-13 National a
6、nnex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-reference Inside back cover Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:17:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60825-2:1995 ii BSI 05-1999 National foreword This British
7、 Standard has been prepared under the direction of the Electrotechnical Sector Board and is the English language version of EN 60825-1:1994 Safety of laser products Part 2: Safety of optical fibre communication systems including amendment A1:1998 and corrigendum March 1993, published by the European
8、 Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 825-2:1993 including Amendment 1:1997, published by the International Electrical Commission (IEC). BS EN 60825 consists of the following Parts: Part 1: Equipment classification, requirements and users guide; Part 2:
9、Safety of optical fibre communication equipment systems. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from leg
10、al obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 26, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated
11、 in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:17:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60825-2 January 1994 + A1 January 1998 UDC 621.375.826:681.7.086:614.876Incorporates corr
12、igendum March 1993 Descriptors: Laser product, radiation safety, users guide, telecommunication, optical fibre English version Safety of laser products Part 2: Safety of optical fibre communication systems (includes amendment A1:1998) (IEC 825-2:1993 + A1:1997) Scurit des appareils laser Partie 2: S
13、curit des systmes de tlcommunication par fibres optiques (inclut lamendement A1:1998) (CEI 825-2:1993 + A1:1997) Sicherheit von Lasereinrichtungen Teil 2: Sicherheit von Lichtwellenleiter-Kommunikations-systemen (enthlt nderung A1:1998) IEC 825-2:1993 + A1:1997) This European Standard was approved b
14、y CENELEC on 1993-12-08. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national s
15、tandards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and
16、notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerlan
17、d and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1994 Copyright reserved to CENELEC members Ref. No. EN 60825
18、-2:1994 + A1:1998 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:17:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60825-2:1994 BSI 05-1999 2 Foreword The text of document 76(CO)30, as prepared by IEC Technical Committee No. 76: Laser equipment, was submitted to the IEC-CENELEC parall
19、el vote in January 1993. The reference document was approved by CENELEC as EN 60825-2 on 8 December 1993. The following dates were fixed: For products which have complied with the relevant national standard before 1994-12-01, as shown by the manufacturer or by a certification body, this previous sta
20、ndard may continue to apply for production until 1999-12-01. Annexes designated “normative” are part of the body of the standard. Annexes designated “informative”are given only for information. In this standard, Annex A and Annex C are informative and Annex B and Annex ZA are normative. Foreword to
21、amendment A1 The text of document 76/162/FDIS, future amendment 1 to IEC 60825-2:1993, prepared by IEC TC 76, Optical radiation safety and laser equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 60825-2:1994 on 1998-4-01-01. The following dat
22、es were fixed: Annexes designated “informative” are given for information only. In this standard, Annex D and Annex E are informative. NOTEHarmonized as HD 485 S1:1987 (not modified) Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Manufacturing requirements5 4.1Engineering spec
23、ifications5 4.1.1General remarks5 4.1.2Cable design5 4.1.3Cable connectors5 4.1.4Automatic power reduction5 4.2Labelling5 4.3Provision of information6 4.4Assessment of hazard level6 4.5Requirements for installation6 5Guidance for service and maintenance7 5.1Tests and measurements7 5.2Safety precauti
24、ons7 5.2.1General remarks7 5.2.2Precautions in locations with hazard levels greater than hazard level 27 5.2.3Training programme8 Annex A (informative) Rationale9 Annex B (normative) Summary of engineering requirements at locations in optical fibre communication systems10 Annex C (informative) Metho
25、ds of hazard/safety analysis10 Annex D (informative) Application notes for the safe use of optical fibre communication systems11 Annex E (informative) Bibliography26 Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publication
26、s26 Figure D.1 PON (passive optical network) based system25 Table D.1 Optical fibre system power limits for 11 micron singlemode and 0,18 numerical aperture multimode fibres22 Table D.2 Automatic power reduction Immediately accessible situations23 Table D.3 Controlled access example scenarios24 Tabl
27、e D.4 Restricted access example scenarios24 Table D.5 Unrestricted access example scenarios25 latest date of publication of an identical national standard(dop) 1994-12-01 latest date of withdrawal of conflicting national standards(dow) 1994-12-01 latest date by which the amendment has to be implemen
28、ted at national level by publication of an identical national standard or by endorsement(dop) 1998-10-01 latest date by which the national standards conflicting with the amendment have to be withdrawn(dow) 1998-10-01 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:17:04 GMT+00:00 2006, Unc
29、ontrolled Copy, (c) BSI EN 60825-2:1994 BSI 05-19993 1 Scope This part 2 of IEC 825 provides requirements and specific guidance for the safe use of optical fibre and/or control communication systems where optical power may be accessible at great distance from the optical source. It does not apply to
30、 optical fibre systems primarily designed to transmit optical power for applications such as material processing or medical treatment. Throughout this part of IEC 825, light emitting diodes (LEDs) are included whenever the word “laser” is used. The objective of this part 2 of IEC 825 is to: protect
31、people from optical radiation resulting from optical fibre communication systems. This requires the introduction of engineering requirements and work practices according to the degree of hazard; lay down requirements for manufacturers and operating organizations in order to establish procedures and
32、supply information so that proper precautions can be adopted; ensure adequate warning to individuals of hazards associated with optical fibre communication systems through signs, labels and instructions; reduce the possibility of injury by minimising unnecessary accessible radiation and to give impr
33、oved control of the optical radiation through protective features and provide safe usage of products by specifying user control measures. Annex A gives a more detailed rationale for this part of IEC 825. 2 Normative references The following normative documents contain provisions which, through refer
34、ence in this text, constitute provisions of this part of IEC 825. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 825 are encouraged to investigate the possibility of applying the most
35、 recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 794-2:1989, Optical fibre cables Part 2: Product specifications. IEC 825-1:1993, Safety of laser products Part 1: Equipment classification, requireme
36、nts and users guide. 3 Definitions For the purposes of this part of IEC 825, the following definitions apply. They are in addition to those given in IEC 825-1. 3.1 automatic power reduction a feature of an optical fibre communication system by which the accessible power is reduced to a specified lev
37、el within a specified time, whenever there is an event which could result in human exposure to radiation, e.g. a fibre cable break 3.2 enclosed system system in which, during normal operation, the optical radiation is totally enclosed, e.g. by light-proof cabinets, components, total internal reflect
38、ion or optical fibre cables and connectors 3.3 end-user the person/organization using the optical fibre communication system in the manner the system was designed to be used. The user cannot necessarily control the power generated and transmitted within the system 3.4 hazard level the potential haza
39、rd at any accessible location within an optical fibre communication system. It is based on the level of optical radiation which could become accessible in reasonably foreseeable circumstances, e.g. a fibre cable break. It is closely related to the laser classification procedure in IEC 825-1 3.5 haza
40、rd level 1 a hazard level 1 is allocated to any part within an optical fibre communication system at which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits (AEL) of class 1 for the applicable wavelengths and emission duration wi
41、ll not occur 3.6 hazard level 2 a hazard level 2 is allocated to any part within an optical fibre communication system at which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits of class 2 for the applicable wavelengths and emiss
42、ion duration will not occur Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 01:17:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60825-2:1994 4 BSI 05-1999 3.7 hazard level 3A a hazard level 3A is allocated to any part within an optical fibre communication system at which, under reasonably
43、foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits of class 3A for the applicable wavelengths and emission duration will not occur 3.8 hazard level k 3A in the wavelength range 400 nm to 4 000 nm, a hazard level k 3A is allocated to any part within
44、 an optical fibre communication system at which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits of hazard level k 3A for the applicable wavelengths and emission duration will not occur. For purposes of the k 3A hazard level eva
45、luation, class 3A AEL table is used and the minimum measurement distance shall be increased to 250 mm from the apparent source and the time base used shall be 10 s provided longer viewing durations are not reasonably foreseeable NOTEThe value of k is not a constant and need not be calculated (see An
46、nex A for rationale). 3.9 hazard level 3B a hazard level 3B is allocated to any part within an optical fibre communication system at which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits of class 3B for the applicable wavelengt
47、hs and emission duration will not occur 3.10 hazard level 4 a hazard level 4 is allocated to any part within an optical fibre communication system at which, under reasonably foreseeable circumstances, human access to laser radiation in excess of the accessible emission limits of class 3B for the app
48、licable wavelengths and emission duration may occur 3.11 light emitting diode (LED) any semiconductor p-n junction device which can be made to produce electromagnetic radiation by radiative recombination in the semi-conductor in the wavelength range from 180 nm to 1 mm (The optical radiation is prod
49、uced primarily by the process of spontaneous emission, although some stimulated emission may be present.) 3.12 local operator control an optical communication system is under local operator control if the operating controls and the optical output may be directly monitored simultaneously by a single operator who has control over the potential human access to optical radiation 3.13 location with controlled access a location where access to the protective housing (enclosure) is controlled and is accessible only t