1、ASD STANDARD NORME ASD ASD NORM prEN 3745-203 Edition P 1 September 2006 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 763 3565 - www.asd-stan.org ICS: 49.060 Descriptors: ENGLISH VERSION
2、 Aerospace series Fibres and cables, optical, aircraft use Test methods Part 203: Cable dimensions Srie arospatiale Fibres et cbles optiques usage aronautique Mthodes dessais Partie 203 : Dimensions des cbles Luft- und Raumfahrt Faseroptische Leitungen fr Luftfahrzeuge Prfverfahren Teil 203: Mae Lei
3、tungen 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 Aerospace Industry. It has been technically approved by the experts of the c
4、oncerned 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-identification of the standard. After examination and review by users and
5、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 then to implement the EN at national level by giving the EN the stat
6、us of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 30 September 2006 Comments should be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2006 by ASD-STAN prEN 3745-203:20062 Content
7、s Page Foreword . 2 1 Scope 3 2 Normative references 3 3 Preparation of specimens 3 4 Apparatus. 3 5 Method 4 6 Final measurements and requirements 4 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried out in accor
8、dance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 3745-203:20063 1 Scope This standard specifies a method of measuring the dimensions of fibre optic cables. It shall be used together with EN 3745-100. 2 Normative r
9、eferences 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) applies. EN 3745-100, Aerospace series Fibres an
10、d cables, optical, aircraft use Test methods Part 100: General. 1) 3 Preparation of specimens 3.1 Dimensions 3.1.1 Tube and jacket Each sample shall consist of a cross-sectional slice of insulation from the cable. The sample should be cut and then be placed under the measuring equipment with the pla
11、ne of cut perpendicular to the optical axis. 3.1.2 Tight buffer Prepare a sample of a minimum of 0,5 m in length 3.2 Mass Prepare a sample of a minimum of 1 m in length. 4 Apparatus 4.1 Buffer and jacket dimensions The measurements shall be carried out either with a profile projector, or measuring m
12、icroscope or equivalent apparatus having at least 10 magnification. Readings shall be taken, to 2 decimal places and an estimated 3 decimal places with a specified thickness less than 0,5 mm. 4.2 Mass The mass and length of the specimen shall be determined with an apparatus having an accuracy of at
13、least 1 %. 1) In preparation at the date of publication of this standard.prEN 3745-203:20064 5 Method 5.1 Buffer and external diameter Measure the minimum and maximum values measured in two perpendicular directions at the same point along the cable. 5.2 Buffer tube and jacket thickness and concentri
14、city 5.2.1 The sample shall be placed under the measuring equipment with the plane of cut perpendicular to the optical axis. The radial thickness shall be measured and recorded at the thinnest and thickest points. 5.2.2 The concentricity shall be expressed as 100 times the ratio of the minimum radia
15、l thickness to the maximum radial thickness. 5.3 Mass The measurement shall be made on a specimen whose length shall be given in the technical specification. 6 Final measurements and requirements 6.1 Buffer dimensions 6.1.1 Tight buffer The characteristics shall conform to requirements given in the
16、technical specification or the product standard. 6.1.2 Loose tube The characteristics shall conform to the requirements given in the technical specification or the product standard. The minimum value of the concentricity shall conform to the requirements given in the technical specification or the product standard. 6.2 External diameter The external diameter, minimum radial thickness, maximum radial thickness and concentricity shall conform to that stated in the product standard. 6.3 Mass The mass of the cable, expressed in kg/km, shall conform to the value given in the product standard.
