1、BSI Standards PublicationOptical fibresPart 2-20: Product specifications Sectional specification for category A2 multimode fibresBS EN 60793-2-20:2016National forewordThis British Standard is the UK implementation of EN 60793-2-20:2016.It is identical to IEC 60793-2-20:2015. It supersedes BS EN 6079
2、3-2-20:2009which is withdrawn.The UK participation in its preparation was entrusted by Technical Com-mittee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibres and cables.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does
3、 not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 85612 9ICS 33.180.10Compliance with a British Standard cannot confer immunity fromlegal o
4、bligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60793-2-20:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60793-2-20 Febru
5、ary 2016 ICS 33.180.10 Supersedes EN 60793-2-20:2009 English Version Optical fibres - Part 2-20: Product specifications - Sectional specification for category A2 multimode fibres (IEC 60793-2-20:2015)Fibres optiques - Partie 2-20: Spcifications de produits - Spcification intermdiaire pour les fibres
6、 multimodales de catgorie A2 (IEC 60793-2-20:2015) Lichtwellenleiter - Teil 2-20: Produktspezifikationen - Rahmenspezifikation fr Mehrmodenfasern der Kategorie A2 (IEC 60793-2-20:2015) This European Standard was approved by CENELEC on 2015-12-24. CENELEC members are bound to comply with the CEN/CENE
7、LEC 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 standards may be obtained on application to the CEN-CENELEC Management Centre o
8、r 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 notified to the CEN-CENELEC Management Centre has the same status as
9、 the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lux
10、embourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung
11、CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60793-2-20:2016 E BS EN 60793-2-20:2016EN 60793-2-20:2016 2 European foreword The text of document 86A/1602/CDV, f
12、uture edition 3 of IEC 60793-2-20, prepared by SC 86A “Fibres and cables“ of IEC/TC 86 “Fibre optics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60793-2-20:2016. The following dates are fixed: latest date by which the document has to be implemented at national level
13、 by publication of an identical national standard or by endorsement (dop) 2016-09-24 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2018-12-24 This document supersedes EN 60793-2-20:2009. Attention is drawn to the possibility that some of the ele
14、ments of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60793-2-20:2015 was approved by CENELEC as a European Standard without any modific
15、ation. BS EN 60793-2-20:2016EN 60793-2-20:2016 3 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application.
16、 For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2
17、Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60793-1-20 2001 Optical fibres - Part 1-20: Measurement methods and test procedures - Fibre geometry EN 60793-1-20 2002 IEC 60793-1-21
18、 - Optical fibres - Part 1-21: Measurement methods and test procedures - Coating geometry EN 60793-1-21 - IEC 60793-1-22 - Optical fibres - Part 1-22: Measurement methods and test procedures - Length measurement EN 60793-1-22 - IEC 60793-1-30 - Optical fibres - Part 1-30: Measurement methods and tes
19、t procedures - Fibre proof test EN 60793-1-30 - IEC 60793-1-31 - Optical fibres - Part 1-31: Measurement methods and test procedures - Tensile strength EN 60793-1-31 - IEC 60793-1-40 - Optical fibres - Part 1-40: Measurement methods and test procedures - Attenuation EN 60793-1-40 - IEC 60793-1-41 -
20、Optical fibres - Part 1-41: Measurement methods and test procedures - Bandwidth EN 60793-1-41 - IEC 60793-1-43 - Optical fibres - Part 1-43: Measurement methods and test procedures - Numerical aperture measurement EN 60793-1-43 - IEC 60793-1-46 - Optical fibres - Part 1-46: Measurement methods and t
21、est procedures - Monitoring of changes in optical transmittance EN 60793-1-46 - BS EN 60793-2-20:2016EN 60793-2-20:2016 4 Publication Year Title EN/HD Year IEC 60793-1-50 - Optical fibres - Part 1-50: Measurement methods and test procedures - Damp heat (steady state) tests EN 60793-1-50 - IEC 60793-
22、1-51 - Optical fibres - Part 1-51: Measurement methods and test procedures - Dry heat (steady state) tests EN 60793-1-51 - IEC 60793-1-52 - Optical fibres - Part 1-52: Measurement methods and test procedures - Change of temperature tests EN 60793-1-52 - IEC 60793-2 - Optical fibres - Part 2: Product
23、 specifications - General EN 60793-2 - BS EN 60793-2-20:2016 2 IEC 60793-2-20:2015 IEC 2015 CONTENTS FOREWORD . 4 1 Scope 6 2 Normative references. 6 3 Specifications 7 3.1 General . 7 3.2 Dimensional requirements . 7 3.3 Mechanical requirements . 8 3.4 Transmission requirements 8 3.5 Environmental
24、requirements 9 (normative) Specifications for sub-category A2a multimode fibres . 10 Annex AA.1 General . 10 A.2 Dimensional requirements . 10 A.3 Mechanical requirements . 10 A.4 Transmission requirements 10 A.5 Environmental requirements 11 (normative) Specifications for sub-category A2b multimode
25、 fibres . 12 Annex BB.1 General . 12 B.2 Dimensional requirements . 12 B.3 Mechanical requirements . 12 B.4 Transmission requirements 12 B.5 Environmental requirements 13 (normative) Specifications for sub-category A2c multimode fibres . 14 Annex CC.1 General . 14 C.2 Dimensional requirements . 14 C
26、.3 Mechanical requirements . 14 C.4 Transmission requirements 14 C.5 Environmental requirements 15 Bibliography . 16 Table 1 Relevant dimensional attributes and measurement methods . 7 Table 2 Dimensional requirements common to all category A2 fibres . 7 Table 3 Additional dimensional attributes req
27、uired for each sub-category 8 Table 4 Relevant mechanical attributes and test methods . 8 Table 5 Mechanical requirements common to all category A2 fibres 8 Table 6 Relevant transmission attributes and measurement methods 8 Table 7 Requirements common to all category A2 fibres 9 Table 8 Relevant env
28、ironmental attributes and test methods . 9 Table A.1 Dimensional requirements specific to A2a fibres 10 Table A.2 Mechanical requirements specific to A2a fibres . 10 Table A.3 Transmission requirements specific to A2a fibres . 11 Table A.4 Environmental exposure tests . 11 Table A.5 Attributes measu
29、red . 11 BS EN 60793-2-20:2016IEC 60793-2-20:2015 IEC 2015 3 Table B.1 Dimensional requirements specific to A2b fibres . 12 Table B.2 Mechanical requirements specific to A2b fibres . 12 Table B.3 Transmission requirements specific to A2b fibres 12 Table B.4 Environmental exposure tests . 13 Table B.
30、5 Attributes measured . 13 Table C.1 Dimensional requirements specific to A2c fibres . 14 Table C.2 Mechanical requirements specific to A2c fibres . 14 Table C.3 Transmission requirements specific to A2c fibres 14 Table C.4 Environmental exposure tests . 15 Table C.5 Attributes measured . 15 BS EN 6
31、0793-2-20:2016 4 IEC 60793-2-20:2015 IEC 2015 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 2-20: Product specifications Sectional specification for category A2 multimode fibres FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standard
32、ization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes Intern
33、ational Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate
34、in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between th
35、e two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications hav
36、e the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misi
37、nterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding natio
38、nal or regional publication shall be clearly indicated in the latter. 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services c
39、arried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National
40、Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is dra
41、wn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not
42、 be held responsible for identifying any or all such patent rights. International Standard IEC 60793-2-20 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This third edition cancels and replaces the second edition, published in 2007. This edition
43、 constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) Nathhas been replaced by NAff; b) specified test specimen length and measurement details for core diameter and NAffmeasurements. BS EN 60793-2-20:2016IEC 6079
44、3-2-20:2015 IEC 2015 5 The text of this standard is based on the following documents: CDV Report on voting 86A/1602/CDV 86A/1628A/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted
45、in accordance with the ISO/IEC Directives, Part 2. A list of all parts in the IEC 60793 series, published under the general title Optical fibres, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated
46、on the IEC website under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour insid
47、e logo on the cover page of this publication indicates that it contains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. BS EN 60793-2-20:2016 6 IEC 60793-2-20:2015 IEC 2015 OPTICAL FIBRES Part
48、 2-20: Product specifications Sectional specification for category A2 multimode fibres 1 Scope This part of IEC 60793 is applicable to sub-categories A2a, A2b, and A2c. These fibres are used or can be incorporated in information transmission equipment and optical fibre cables (typically up to 2 km).
49、 Three types of requirements apply to these fibres: general requirements as defined in IEC 60793-2; specific requirements common to the category A2 multimodal fibres covered in this standard and which are given in Clause 3; particular requirements applicable to individual sub-categories or specific applications, which are defined in the normative family specification annexes. 2 Normative references The following documents, in who
