1、 IEC 60794-1-23 Edition 1.0 2012-08 INTERNATIONAL STANDARD Optical fibre cables Part 1-23: Generic specification Basic optical cable test procedures Cable element test methods IEC 60794-1-23:2012(E) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2012 IEC, Geneva, Switzerland All rig
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9、ptical fibre cables Part 1-23: Generic specification Basic optical cable test procedures Cable element test methods INTERNATIONAL ELECTROTECHNICAL COMMISSION P ICS 33.180.10 PRICE CODE ISBN 978-2-83220-319-4 Registered trademark of the International Electrotechnical Commission Warning! Make sure tha
10、t you obtained this publication from an authorized distributor. colour inside 2 60794-1-23 IEC:2012(E) CONTENTS FOREWORD . 4 1 Scope and object 6 2 Normative references . 6 3 Method G1: Bend test for cable elements . 6 3.1 Object . 6 3.2 Sample 6 3.3 Apparatus 6 3.4 Procedure . 7 3.5 Requirements 7
11、3.6 Details to be specified . 7 4 Method G2: Ribbon dimensions and geometry Visual method 7 4.1 Object . 7 4.2 Sample 7 4.3 Apparatus 7 4.4 Procedure . 7 4.4.1 General . 7 4.4.2 Method 1 . 7 4.4.3 Method 2 . 8 4.5 Requirements 8 4.6 Details to be specified . 8 4.7 Definitions of ribbon dimensions an
12、d geometry 8 4.7.1 General . 8 4.7.2 Width and height . 8 4.7.3 Basis line . 8 4.7.4 Fibre alignment 8 5 Method G3: Ribbon dimensions Aperture gauge 9 5.1 Object . 9 5.2 Sample 9 5.3 Apparatus 9 5.4 Procedure . 9 5.5 Requirement 10 5.6 Details to be specified . 10 6 Method G4: Ribbon dimensions Dial
13、 gauge (Test deleted) . 10 7 Method G5: Ribbon tear (separability) 10 7.1 Object . 10 7.2 Sample 10 7.3 Apparatus 11 7.4 Procedure . 11 7.5 Requirements 11 7.6 Details to be specified . 11 8 Method G6: Ribbon torsion . 12 8.1 Object . 12 8.2 Sample 12 8.3 Apparatus 12 8.4 Procedure . 12 8.5 Requirem
14、ents 12 60794-1-23 IEC:2012(E) 3 8.6 Details to be specified . 12 9 Method G7: Tube kinking 13 9.1 Object . 13 9.2 Sample 13 9.3 Apparatus 13 9.4 Procedure . 14 9.5 Requirements 14 9.6 Details to be specified . 15 10 Method G8: Ribbon residual twist test 15 10.1 Object . 15 10.2 Sample 15 10.3 Appar
15、atus 15 10.4 Procedure . 16 10.5 Requirements 16 10.6 Details to be specified . 16 Figure 1 Cross-sectional drawing illustrating fibre ribbon geometry 9 Figure 2 Aperture gauge 10 Figure 3 Sample preparation 11 Figure 4 Separability procedure . 12 Figure 5 Torsion test 13 Figure 6 Tube kinking test
16、15 Table 1 Examples of test apparatus dimensions: 14 4 60794-1-23 IEC:2012(E) INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRE CABLES Part 1-23: Generic specification Basic optical cable test procedures Cable element test methods FOREWORD 1) The International Electrotechnical Commission (IE
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26、 other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be
27、 the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60794-1-23 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This edition of IEC 60794-1-23 cancels and repl
28、aces the cable elements tests methods part of the second edition of IEC 60794-1-2 published in 2003. It constitutes a technical revision. The main change with respect to the previous edition is that it has been decided to split the second edition of IEC 60794-1-2 into six new documents: IEC 60794-1-
29、2, Optical fibre cables Part 1-2: Generic specification Basic optical cable test procedures IEC 60794-1-20, Optical fibre cables Part 1-20: Generic specification Basic optical cable test procedures General 60794-1-23 IEC:2012(E) 7 b) an attenuation measuring apparatus (see IEC 60793-1-40). 3.4 Proce
30、dure The element to be tested shall be loosely wound on the mandrel; the number of turns shall be stated in the detail specification. In order to measure the attenuation increase caused by bending, allowance should be made for the intrinsic attenuation of the fibre. 3.5 Requirements Any increase in
31、attenuation shall comply with the limits shown in the detail specification. 3.6 Details to be specified The detail specification shall include the following: a) optical test wavelength; b) diameter of the mandrel; c) number of turns; d) apparatus and attenuation measuring technique; e) temperature.
32、4 Method G2: Ribbon dimensions and geometry Visual method 4.1 Object The purpose of this test is to determine the geometry of an optical fibre ribbon as defined by the parameters of width, height and fibre alignment, for the purpose of type testing to assume proper manufacturing process control. Thi
33、s test is not necessarily suitable for final product inspection and, unless otherwise specified, shall not be used for that purpose. 4.2 Sample The number of samples to be tested shall be specified in the detail specification. The selected samples shall be statistically independent and representativ
34、e of the ribbon population tested. 4.3 Apparatus The apparatus consists of a microscope or profile projector with appropriate magnification. 4.4 Procedure 4.4.1 General Either of the two following procedures may be used. For the specified number of samples, all dimensions shall be measured as averag
35、e as well as maximum and minimum values. 4.4.2 Method 1 The sample is prepared by cutting it perpendicular to the axis of the ribbon and placing it in a curable resin or in a tool which holds the ribbon. If necessary, the sample shall be ground and polished to prepare a smooth perpendicular end face
36、. The prepared sample is secured with its end face perpendicular to the optical path and measured by means of a microscope or profile projector. 8 60794-1-23 IEC:2012(E) NOTE Care should be taken that the preparation of the sample does not change the structure of the fibre ribbon and represents an u
37、ndisturbed image of the fibre cladding and ribbon cross-section. 4.4.3 Method 2 Place the ribbon in a ribbon fibre holder and remove 20 mm to 25 mm of the fibre coating and matrix material with the ribbon hot sheath stripping tool and wipe the stripped portion of the fibres clean with an alcohol-moi
38、stened pad. Adjust the position of the ribbon in the ribbon fibre holder and cleave the fibres at a distance of 250 m to 500 m from the stripped edge of the ribbon. Cut and polish the other end of the ribbon, and illuminate it with a collimated light source. Align and measure the cleaved end of the
39、ribbon under microscope. NOTE Care should be taken that the preparation of the sample does not change the structure of the fibre ribbon and represents an undisturbed image of the fibre cladding and ribbon cross-section. 4.5 Requirements Unless otherwise specified in the detail specification, the wid
40、th, height and fibre alignment shall be in accordance with IEC 60794-3:2001, Table 1. 4.6 Details to be specified The detail specification shall include the following: a) permissible maximum and minimum values; b) average values; c) number of samples tested. 4.7 Definitions of ribbon dimensions and
41、geometry 4.7.1 General The following definitions apply to a fibre ribbon cross-section as shown in Figure 1. The figure illustrates an example for a 4-fibre ribbon, where a is the diameter of a coloured fibre. NOTE In consideration of the precision of fiber geometric attributes and the relatively la
42、rger precision of ribbon geometry requirements, it is acceptable for glass core/glass cladding fibres to use the edge of the cladding for the measurements of 4.7.3 and 4.7.4 in lieu of the fibre centres. In this case, the measurements shall be made on the same side of all fibres (e.g. top or bottom,
43、 left or right side). 4.7.2 Width and height The width w and height h of the ribbon are the dimensions of the minimum rectangular area enclosing the ribbon cross-section. 4.7.3 Basis line The basis line is given in the cross-section of an optical fibre ribbon as the straight line crossing the fibre
44、centres of the first fibre (fibre 1) and the last fibre (fibre n) of the fibre ribbon. 4.7.4 Fibre alignment 4.7.4.1 Horizontal fibre separation The horizontal separation of fibres is the distance of the orthogonal projection of two fibre centres on the basis line in the fibre ribbon cross-section. Two horizontal separation parameters can be distinguished: a) centre-centre distance d between adjacent fibres; b) centre-centre distance b between the extreme fibres;
