1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 3745-301 Edition P 2 June 2010 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.orgICS: Supersedes edition P
2、1 of April 1998 and will supersede EN 3745-301:2002 Descriptors: ENGLISH VERSION Aerospace series Fibres and cables, optical, aircraft use Test methods Part 301: Attenuation Srie arospatiale Fibres et cbles optiques usage aronautique Mthodes dessais Partie 301 : Attnuation Luft- und Raumfahrt Fasero
3、ptische Leitungen fr Luftfahrzeuge Prfverfahren Teil 301: Optische Dmpfung This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospac
4、e Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identi
5、fication of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have
6、then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 30 June 2010 Comments should be sent within six months after the date of publication to ASD-STAN Electrica
7、l Domain Copyright 2010 by ASD-STAN prEN 3745-301:2010 (E) 2 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Preparation of specimens.3 4 Apparatus .3 5 Methods 4 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and
8、votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 3745-301:2010 (E) 3 1 Scope This standard specifies procedures for the practical measurement of the attenuation and variation in attenuati
9、on of optical fibre or optical cable (both hereafter referred to as fibre). Methods A and B are intended for fibre acceptance testing and shall be performed on fibre lengths greater than 1 km. Method C is intended for attenuation measurement required during environmental and mechanical testing and s
10、hall be performed on fibre lengths less than 100 m. 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
11、 any amendments) applies. EN 2591-100, Aerospace series Elements of electrical and optical connection Test methods Part 100: General EN 2591-601, Aerospace series Elements of electrical and optical connection Test methods Part 601: Optical elements Insertion loss EN 2591-602, Aerospace series Elemen
12、ts of electrical and optical connection Test methods Part 602: Optical elements Variation of attenuation and optical discontinuity EN 3745-100, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 100: General EN 188000, Generic specification for optical fibres 1)IEC 60793-1-4
13、0, Optical fibres Part 1-40: Measurement methods and test procedures Attenuation 2)3 Preparation of specimens 3.1 The fibre ends shall conform to the fibre end preparation criteria specified in EN 2591-100. 3.2 The length of fibre to be tested shall be in accordance with the product specification. 3
14、.3 All other aspects of specimen preparation shall be in accordance with EN 188000, method 301 or method 302, or EN 2591-602 method A, or IEC 60793-1-40 depending on the test being performed. 4 Apparatus 4.1 The light launch system for methods A and B shall conform to the criteria specified in EN 18
15、8000. The light launch system for method C shall conform to the criteria specified in EN 2591-100. The light launch system for method D shall conform to the criteria specified in IEC 60793-1-40. 4.2 The light detection system shall be compatible with the light launch system as discussed in EN 2591-1
16、00. 1) Published by: BSI National(GB) British Standards Institute http:/www.bsi- 2) Published by: IEC International Commission Electrotechnique Internationale http:/www.iec.ch/ prEN 3745-301:2010 (E) 4 4.3 All other aspects of the apparatus shall be in accordance with EN 188000 method 301, EN 2591-6
17、01 method 1 or 4, or EN 2591-602 method A, or IEC 60793-1-40 Annex C depending on the method being performed. 4.4 Test conditions for attenuation or attenuation variation measurement shall be as specified in EN 3745-100 unless stated otherwise in the product specifications. 5 Methods 5.1 Method A (C
18、ut-back technique) Procedure: the test method shall conform to EN 188000 method 301. 5.2 Method B (Insertion loss) Procedure: the test method shall conform to EN 188000 method 302. 5.3 Method C (Attenuation variation) Procedure: the test method shall conform to EN 2591-602 method A. 5.4 Method D (Backscattering) Procedure: the test method shall conform to IEC 60793-1-40 Annex C.
