1、BRITISH STANDARD AEROSPACE SERIESBS EN3745-406:2005Fibres and cables, optical, aircraft use Test methods Part 406: Cold bend testThe European Standard EN 3745-406:2005 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54
2、g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3745-406:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006ISBN 0 580 48638 9National forewordThis
3、British Standard is the official English language version of EN 3745-406:2005. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology, to Subcommittee ACE/6/-/10, Aerospace Fibre optic systems and equipment, which h
4、as the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section
5、 entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compl
6、iance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related int
7、ernational and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was
8、last issued.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3745-406November 2005ICS 49.060English VersionAerospace series - Fibres and cables, optical, aircraft use - Testmethods - Part 406: Cold bend testSrie arospatiale - Fibres et cbles
9、optiques usagearonautique - Mthodes dessais - Partie 406 :Enroulement froidLuft- und Raumfahrt - Faseroptische Leitungen frLuftfahrzeuge - Prfverfahren - Teil 406: Wickeln bei KlteThis European Standard was approved by CEN on 19 September 2005.CEN members are bound to comply with the CEN/CENELEC Int
10、ernal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member
11、.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are t
12、he national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom
13、.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3745-406:2005: E2 Contents
14、 Foreword 3 1 Scope .4 2 Normative references .4 3 Preparation of specimens 4 4 Apparatus 4 5 Method .5 EN 3745-406:20053 Foreword This European Standard (EN 3745-406:2005) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and vo
15、tes carried out in accordance with the rules of this Association, this Standard has re-ceived the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standar
16、d, either by publication of an identical text or by endorsement, at the latest by May 2006, and conflicting national standards shall be withdrawn at the latest by May 2006. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/o
17、r CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Den-mark,
18、 Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3745-406:20054 1 Scope This standard specifies a method to determine t
19、he ability of an optical fibre cable to withstand bending at low temperature. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the ref
20、erenced 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: General1)EN 3745-201, Aerospace series Fibres
21、and cables, optical, aircraft use Test methods Part 201: Visual inspection EN 3745-301, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 301: Attenuation 3 Preparation of specimens 3.1 lf not at standard test conditions, the specimens shall be subjected to standard test co
22、nditions and stabilized at these conditions for 24 h as defined in EN 3745-100. Attenuation should be measured, in accordance with EN 3745-301 method C, before the test. 3.2 The following details shall be specified if not already included in the product standard: the number and length of specimens (
23、or number of turns around the mandrel); diameter of mandrel; the number of cycles, if not two; maximum permissible variation in attenuation; the temperature at which test is carried out. 4 Apparatus The test requires a suitable cold chamber capable of temperature control of 2 C, a mandrel, a Light L
24、aunch System (LLS) and Light Detector System (LDS) as defined in EN 2591-100. 1) In preparation at the date of publication of this standard. EN 3745-406:20055 5 Method 5.1 Procedure After conditioning, the samples shall be subjected to the low temperature for 1 h. Immediately after condition-ing at
25、the low temperature, the specimen shall be wrapped around the mandrel the specified number of times. The specimen shall be fixed so as to remain in contact with the mandrel throughout each turn. The specimen shall then be subjected to the low temperature for a period of 1 h. Whilst still at the lowe
26、r temperature, the specimen shall be wound off the mandrel and re-wound in the opposite direction, so that the compressed part in the first operation becomes the stretched part in the second one. The cycle shall be repeated once or the number of times specified in the product standard, on the same s
27、ample. 5.2 Final measurements and requirements After returning the sample to standard conditions for 1 h, the following tests are to be carried out: EN 3745-201: Visual examination; EN 3745-301: Attenuation, method C, maximum change in attenuation shall be within that specified. EN 3745-406:2005BS E
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