1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 3745-510:2012Aerospace series Fibres and cables, optical, aircraft use T e s t m e t h o d sPart 510: Bending testCopyright European Committee for Standardization Provided
2、by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-510:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 3745-510:2012. It supersedes BS EN 3745-510:2002 which is withdrawn.The UK partici
3、pation in its preparation was entrusted to Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of
4、 a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012ISBN 978 0 580 77589 5 ICS 49.060 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under
5、the authority of the Standards Policy and Strategy Committee on 30 September 2012.Amendments issued since publicationDate T e x t a f f e c t e dCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without licens
6、e from IHS-,-,-BS EN 3745-510:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3745-510 August 2012 ICS 49.090 Supersedes EN 3745-510:2002English Version Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 510: Bending test Srie arospatiale - Fibres et cbles opt
7、iques usage aronautique - Mthodes dessais - Partie 510: Essai de courbure Luft- und Raumfahrt - Faseroptische Leitungen fr Luftfahrzeuge - Prfverfahren - Teil 510: Biegetest This European Standard was approved by CEN on 23 March 2012. CEN members are bound to comply with the CEN/CENELEC Internal Reg
8、ulations 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 or to any CEN mem
9、ber. 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 CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
10、CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland
11、 Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form an
12、d by any means reserved worldwide for CEN national Members. Ref. No. EN 3745-510:2012: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-510:2012EN 3745-510:2012 (E) 2
13、Contents Page Foreword 31 Scope 42 Normative references 43 Preparation of specimens .44 Apparatus .55 Methods 7Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-510:2012
14、EN 3745-510:2012 (E) 3 Foreword This document (EN 3745-510:2012) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approv
15、al of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2013, and confl
16、icting national standards shall be withdrawn at the latest by February 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This docu
17、ment supersedes EN 3745-510:2002. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav
18、Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Copyright European Committee for Standardization Prov
19、ided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-510:2012EN 3745-510:2012 (E) 4 1 Scope This European Standard specifies a method of determining the attenuation variation of an optical cable during mechanical bending unde
20、r load at the maximum and minimum operating temperatures. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the late
21、st edition of the referenced document (including any amendments) applies. EN 2591-100, Aerospace series Elements of electrical and optical connection Test methods Part 100: General EN 3745-100, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 100: General EN 3745-201, Aero
22、space series Fibres and cables, optical, aircraft use Test methods Part 201: Visual examination EN 3745-301, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 301: Attenuation 3 Preparation of specimens 3.1 General The specimens shall be prepared according to the product st
23、andard. If not yet at standard test conditions, the specimens shall be subjected to standard test conditions and stabilized at these conditions for 24 h as defined in EN 2591-100. 3.2 Method A Unless specified in the technical specification, the following details shall be stated: type and length of
24、fibre or cable; mass M to be applied to ensure contact between the cable and the mandrel; diameter(s) D of the mandrel; number of turns N; maximum permissible variation of attenuation induced by each turn up to N (EN 3745-301); variation of attenuation 1 h after the end of the test; permissible resi
25、dual attenuation after removal from test set-up. 3.3 Method B Unless specified in the applicable product standard, the following details shall be stated: the number and length of specimens; the mandrel diameters; the separation distance between the mandrels; the number of wraps around the mandrels;
26、the maximum permissible variation in attenuation; the wavelengths to be measured. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-510:2012EN 3745-510:2012 (E) 5 4 Appa
27、ratus 4.1 Method A The apparatus shall comprise: a Light Launch System (LLS) as defined in EN 2591-100. a Light Detection System (LDS) as defined in EN 2591-100. a test fixture capable of applying the bending test required by the specification. A typical arrangement is shown in Figure 1. Key 1 Fixed
28、 point 2 Fixed mandrel 3 Mass 4 LLS 5 LDS Figure 1 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-510:2012EN 3745-510:2012 (E) 6 4.2 Method B The apparatus shall comp
29、rise: a Light Launch System (LLS) as defined in EN 2591-100. a Light Detection System (LDS) as defined in EN 2591-100. a test fixture capable of applying the bending test required by the specification. A typical arrangement is shown in Figure 2. Key 1 LLS 2 Mandrels 3 LDS 4 Fibber optic cable Figure
30、 2 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 3745-510:2012EN 3745-510:2012 (E) 7 5 Methods 5.1 Method A 5.1.1 Procedure Method A Connect the specimen end to the LLS.
31、After fixation of this specimen on the fixed point, install the mass on the specimen. Connect the specimen end to the LDS. Zero the LDS to establish a reference measurement. Roll up the specimen one turn on the mandrel. Measure the variation of attenuation (EN 3745-301, method C). Repeat N times the
32、 two last operations. Maintain the specimen on the test equipment for 1 h and then remeasure the variation of attenuation. 5.1.2 Final measurements and requirements Method A Measure the residual attenuation (EN 3745-301, method C) after removing the specimen from the test equipment. EN 3745-201 Visu
33、al examination 5.2 Method B 5.2.1 Procedure Method B Install the mandrels on a suitable fixture in to maintain a separation distance (center to center) as specified in the applicable product standard. Connect the specimen ends to the LLS and LDS. Straighten the specimen and perform the initial trans
34、mittance measurement to obtain a reference measurement. Wrap the entire specimen around two (2) mandrels with minimum tension to keep the cable from sagging. After the winding is complete, perform the final transmittance measurement. 5.2.2 Final measurements and requirements Method B Measure the att
35、enuation variation (EN 3745-301, method C) before and after wrapping the specimen on the mandrels. The difference in attenuation shall be less than the specified value in the applicable product standard. Copyright European Committee for Standardization Provided by IHS under license with CENNot for R
36、esaleNo reproduction or networking permitted without license from IHS-,-,-This page deliberately left blankCopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-This page deliberately
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