1、BRITISH STANDARD AEROSPACE SERIESBS EN3745-306:2005Fibres and cables, optical, aircraft use Test methods Part 306: Variation of attenuation during temperature cyclingThe European Standard EN 3745-306:2005 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56
2、g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Wed Aug 23 03:39:47 BST 2006, Uncontrolled Copy, (c) BSIBS EN 3745-306:2005This British Standard was published under the
3、 authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006ISBN 0 580 48643 5National forewordThis British Standard is the official English language version of EN 3745-306:2005. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avion
4、ic electrical and fibre optic technology, to Subcommittee ACE/6/-/10, Aerospace Fibre optic systems and equipment, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which impleme
5、nt international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does n
6、ot purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance 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 c
7、ommittee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international 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 a
8、nd a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Wed Aug 23 03:39:47 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NOR
9、MEN 3745-306November 2005ICS 49.060English VersionAerospace series - Fibres and cables, optical, aircraft use - Testmethods - Part 306: Variation of attenuation during temperaturecyclingSrie arospatiale - Fibres et cbles optiques usagearonautique - Mthodes dessais - Partie 306 : Variationde lattnuat
10、ion en tempratureLuft- und Raumfahrt - Faseroptische Leitungen frLuftfahrzeuge - Prfverfahren - Teil 306:Dmpfungsnderung bei TemperaturwechselThis European Standard was approved by CEN on 19 September 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the
11、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.This European Standard exists in thre
12、e 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 the national standards bodies of Austri
13、a, 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.EUROPEAN COMMITTEE FOR STANDARDIZATIO
14、NCOMIT 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 3745-306:2005: ELicensed Copy: Wang Bin, na, Wed Aug 23 03:39:47
15、 BST 2006, Uncontrolled Copy, (c) BSI2 Contents Foreword 3 1 Scope .4 2 Normative references .4 3 Preparation of specimens 4 4 Apparatus 4 5 Method .5 EN 3745-306:2005Licensed Copy: Wang Bin, na, Wed Aug 23 03:39:47 BST 2006, Uncontrolled Copy, (c) BSI3 Foreword This European Standard (EN 3745-306:2
16、005) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes 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
17、 member countries of AECMA, 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 May 2006, and conflicting national standards shall be withdrawn at the latest by May 2
18、006. 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. According to the CEN/CENELEC Internal Regulations, the national standards organiz
19、ations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Den-mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Sl
20、ovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3745-306:2005Licensed Copy: Wang Bin, na, Wed Aug 23 03:39:47 BST 2006, Uncontrolled Copy, (c) BSI4 1 Scope This standard specifies a method for checking the variation of attenuation of an optical cable during tempera-ture cycling. 2 Norm
21、ative 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 referenced document (including any amendments) applies. EN 2591-100, Aerospace series E
22、lements 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 and cables, optical, aircraft use Test methods Part 201: Visual inspection EN 3745-3
23、01, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 301: AttenuationEN 3745-402, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 402: Temperature cycling 3 Preparation of specimens 3.1 Specimens shall be prepared as specified in the product sta
24、ndard lf not yet at standard test conditions, the specimens shall be subjected to standard test conditions and stabi-lized at these conditions for 24 h as defined in EN 3745-100. The specimens shall be loosely coiled with the bend radius not smaller than specified storage radius. 3.2 Unless otherwis
25、e indicated in the technical specification the following details shall be specified: type and length of cable/fibre; maximum permitted variation in attenuation; temperature cycling (see EN 3745-402); storage bend radius. 4 Apparatus a Light Launch System (LLS) as defined in EN 2591-100; a Light Dete
26、ctor System (LDS) as defined in EN 2591-100; 1) In preparation at the date of publication of this standard. EN 3745-306:2005Licensed Copy: Wang Bin, na, Wed Aug 23 03:39:47 BST 2006, Uncontrolled Copy, (c) BSI5 climatic chamber capable of temperature control of 2 C. 5 Method 5.1 Procedure Connect th
27、e specimen to LLS. Coil it with the specified bend radius. Connect the specimen to LDS. Measure the variation of attenuation (EN 3745-301, method C) continuously throughout the test. Perform the specified cycle numbers of temperature cycling in accordance with EN 3745-402. 5.2 Final measurements and
28、 requirements The maximum increase in attenuation shall not exceed the specified value. Examine the test specimen for damage in accordance with EN 3745-201 Visual examination. EN 3745-306:2005Licensed Copy: Wang Bin, na, Wed Aug 23 03:39:47 BST 2006, Uncontrolled Copy, (c) BSIBS EN 3745-306:2005BSI3
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