1、BS EN3745-514:2009ICS 49.060NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAerospace series Fibres and cables,optical, aircraft use Test methodsPart 514: Cable twist bendThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCo
2、mmittee on 31 March2009 BSI 2009ISBN 978 0 580 57663 8Amendments/corrigenda issued since publicationDate CommentsBS EN 3745-514:2009National forewordThis British Standard is the UK implementation of EN 3745-514:2009.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/6, A
3、erospace avionic electrical and fibre optictechnology.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance
4、with a British Standard cannot confer immunityfrom legal obligations.BS EN 3745-514:2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3745-514February 2009ICS 49.060English VersionAerospace series - Fibres and cables, optical, aircraft use - Testmethods - Part 514: Cable twist bendSrie arospatia
5、le - Fibres et cbles optiques usagearonautique - Mthodes dessais - Partie 514 : Essais detorsion et de courbureLuft- und Raumfahrt - Faseroptische Leitungen frLuftfahrzeuge - Prfverfahren - Teil 514: KombinierteTorsions- und BiegeprfungThis European Standard was approved by CEN on 6 September 2008.C
6、EN members are bound to comply with the CEN/CENELEC Internal 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 appl
7、ication to the CEN Management Centre or to any CEN member.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 CEN Management Centre ha
8、s the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu
9、gal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reser
10、vedworldwide for CEN national Members.Ref. No. EN 3745-514:2009: EBS EN 3745-514:2009EN 3745-514:2009 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Preparation of specimens .44 Apparatus .45 Method 46 Final measurements and requirements .6BS EN 3745-514:2009EN 3745-514:2009 (E) 3
11、Foreword This document (EN 3745-514:2009) 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 approval of the National Asso
12、ciations 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 August 2009, and conflicting national standards
13、 shall be withdrawn at the latest by August 2009. 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 Interna
14、l Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta
15、, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 3745-514:2009EN 3745-514:2009 (E) 4 1 Scope This standard specifies a method for measuring the combined torsion and bending properties of a fibre optic cable. It shall be us
16、ed together with EN 3745-100. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appli
17、es. 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, Aerospace series Fibres and cables, optical, aircraft use Test methods Par
18、t 201: Visual examination EN 3745-301, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 301: Attenuation 3 Preparation of specimens The specimens shall be prepared according to the product standard. If not yet at standard test conditions, the specimens shall be subjected t
19、o standard test conditions and stabilised at these conditions for 24 h as defined in EN 2591-100. Sample length typically 1,7 m unless otherwise stated. 4 Apparatus The apparatus shall comprise: Transmitted power monitoring (LLS and LDS) as defined in EN 2591-100; Fibre and cable attenuation test ap
20、paratus as defined in EN 3745-301; Mandrel, D diameter as specified in product standard; Mass specified in product standard; Tensile load, as specified in product standard; Test temperature (25 C unless otherwise stated); Sample length (1,7 m unless otherwise stated). The number of test cycles shall
21、 be specified in the product standard. 5 Method Unless otherwise stated, the test sample shall be conditioned, for at least two hours, at standard atmospheric conditions before conducting the test and the initial attenuation has to be recorded. BS EN 3745-514:2009EN 3745-514:2009 (E) 5 The specimen
22、shall be installed in the apparatus as shown in Figure 1 below, with length as specified in the product standard. One test cycle consists in the cable being rotated 180 clockwise, returned to the starting position and then rotated 180 anticlockwise and returned to the starting position. The cable sh
23、all be tested for the number of cycles specified in the product standard. The specimen shall be removed from the apparatus and connected to LSS and LDS (see EN 3745-301). Key 1 Test specimen standard length 1,7 m 2 Mass (defined in product standard) 3 200 mm = vertical motion 90 twist from centre (t
24、otal travel 180) 4 Arm driven at 30 cycles per minute 5 Adjustable sheave, adjust to cable diameter plus 0,1 max. NOTE Twist per millimetres of active length to be kept constant when changing pulley and larger clamping arm. Figure 1 Twist bend apparatus 1 4 5 2 3 BS EN 3745-514:2009EN 3745-514:2009
25、(E) 6 6 Final measurements and requirements A visual examination shall be carried out as defined in EN 3745-201 to show that the finished cable specimens do not exhibit any evidence of jacket material degradation. It shall reveal no jacket softening, surface damage (cracking, splitting, or other def
26、ect to permit jacket penetration) or any identification marking impairment that affects legibility. There shall be no fibre break. The change in optical transmittance of the fibre(s) shall not exceed the value given in the product standard after testing (EN 3745-301). BS EN 3745-514:2009This page ha
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