1、 IEC 60793-1-32 Edition 2.0 2010-05 INTERNATIONAL STANDARD Optical fibres Part 1-32: Measurement methods and test procedures Coating strippability IEC 60793-1-32:2010(E) colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC, Geneva, Switzerland All rights reserved. Unless otherwis
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9、res Part 1-32: Measurement methods and test procedures Coating strippability INTERNATIONAL ELECTROTECHNICAL COMMISSION K ICS 33.180.10 PRICE CODE ISBN 978-2-88910-917-3 Registered trademark of the International Electrotechnical Commission colour inside 2 60793-1-32 IEC:2010(E) CONTENTS FOREWORD.3 1
10、Scope.5 2 Normative references .5 3 Apparatus.5 3.1 Tensile equipment.5 3.2 Load cell .6 3.3 Transducer amplifier6 3.4 Stripping tool.6 3.5 Fibre guide6 4 Specimen preparation.7 4.1 Representative sample7 4.2 Strip length7 5 Procedure 7 5.1 Introduction .7 5.2 Stripping rate 7 5.3 Preconditioning .8
11、 5.4 Calibrating the transducer amplifier .8 5.5 Loading the test specimen.8 5.6 Stripping the coating .8 6 Calculations .8 6.1 Calculation of the reported value for a specimen .8 6.2 Calculation for the value of a piece8 6.3 Approach 1 Average strip force 8 6.4 Approach 2 Peak strip force .9 7 Docu
12、mentation .9 8 Specification information 10 Figure 1 Length of fibre to be stripped .7 Figure 2 Example of test arrangement .9 60793-1-32 IEC:2010(E) 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-32: Measurement methods and test procedures Coating strippability FOREWORD 1) The
13、International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and
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22、or reliance upon, this IEC Publication or any 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 o
23、f the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60793-1-32 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. Th
24、is second edition cancels and replaces the first edition published in 2001 and constitutes a technical revision. This edition has been modified to include current practices in the market place. 4 60793-1-32 IEC:2010(E) The text of this standard is based on the following documents: CDV Report on voti
25、ng 86A/1273/CDV 86A/1310/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of IEC 60793-1 series, published u
26、nder the general title Optical fibres Measurement methods and test procedures, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data relat
27、ed to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual version of this publication may be issued at a later date. IMPORTANT The colour inside logo on the cover page of this publication indicates that it con
28、tains colours which are considered to be useful for the correct understanding of its contents. Users should therefore print this document using a colour printer. 60793-1-32 IEC:2010(E) 5 OPTICAL FIBRES Part 1-32: Measurement methods and test procedures Coating strippability 1 Scope This part of IEC
29、60793 is intended primarily for testing either fibres as produced by a fibre manufacturer or subsequently overcoated (tight buffered) using various polymers. The test can be performed either on fibres as produced or after exposure to various environments. This test applies to A1, A2, A3, B and C fib
30、res. The object of this standard is to establish uniform requirements for the mechanical characteristic coating strippability. This test quantifies the force required to mechanically remove the protective coating from optical fibres along their longitudinal axis. This test is not intended as a means
31、 to maximize fibre strength after the coating is removed nor is it intended to specify the best conditions for field stripping of optical fibres. This test is designed for optical fibres having polymeric coatings with nominal outer diameters in the range of 240 m to 900 m. Application of this method
32、 to fibres with outer coating diameters outside the range of 230 m to 930 m is not recommended. Warning Fibres can fracture while being stripped and pierce skin and eyes. Use of protective eyewear is recommended. 2 Normative references The following referenced documents are indispensable for the app
33、lication 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. IEC 60793-1 (all parts), Optical fibres Measurement methods and test procedures 3 Apparatus 3.1 Tensile equipment
34、 Use a suitable device, for example a vertical tensile tester, which provides relative motion between the test fibre and a stripping tool and is capable of imparting constant motion at the velocity found in 5.2, without jerking the fibre under test or the stripping tool. Use a device capable of prov
35、iding relative motion in two directions to allow resetting. Provide suitable means for clamping and maintaining the stripping tool blades perpendicular to the fibre axis or in a position that prevents fibre bending, and for securing one end of the test fibre. To prevent fibre breakage, secure the fi
36、bre at the clamping point without stressing the fibre excessively. Examples of test arrangements are shown in Figure 2. 6 60793-1-32 IEC:2010(E) 3.2 Load cell Use any appropriate device that is capable of sensing the force imparted to the fibre during the removal of the fibre coating. 3.3 Transducer
37、 amplifier This device receives signals from the load cell and indicates the tensile force on the test fibre up to the point when the coating is stripped off. The transducer shall acquire the force data at a rate 100 Hz. The transducer and/or measurement system shall have the ability to plot the tes
38、t data on a continuous chart, such as a strip chart or line chart. It shall also have the capability of capturing sufficient information to calculate the maximum and average forces, along with the amplitude and frequencies of any oscillations in the force during the stripping process The accuracy of
39、 the force measurement shall be stated in the detail specification. 3.4 Stripping tool 3.4.1 Because the results from this test are strongly dependent upon the design of tool used, it is important that the following tool design guidelines be observed: a) Unless otherwise specified in the detail spec
40、ification, use tool blades with the diameter of the hole greater than the nominal cladding diameter of the fibre to be stripped in order not to damage the cladding surface. The stripping tool shall be constructed such that the blades form a circular aperture. A practical example is a hole which is 1
41、5 m larger that the nominal cladding diameter; for 125 m cladding diameter fibres this results in a 140 m circular hole. b) The stripping tool blades shall be constructed such that the blades do not cause fibre bending. Stripping tools in which the blades butt together in the same plane are preferre
42、d in this test. 3.4.2 Mount the stripping tool on the test fixture and provide a means to hold it closed around the fibre using suitable clamps. Ensure the fibre is pulled in a direction normal to the plane of the blades. 3.4.3 Replace the stripping tools at intervals as dictated by a documented qua
43、lity schedule, when the blades become dull or damaged, or whenever wear appears sufficient to affect the test results. NOTE Tool wear can affect any or all of the following: fibre breakage, the amount of residue left on the glass surface, the way in which the coating is removed from the fibre, and t
44、he force required to remove the coatings. 3.5 Fibre guide A fibre guide shall be provided to support the fibre which extends past the stripping tool blade (if not already designed into the tool) and which meets the following requirements: a) the guide shall support the fibre to prevent sagging due t
45、o the weight of the fibre; b) the guide shall prevent bending of the fibre caused by buckling of the fibre coating as it is removed; c) the guide shall be located as close to the stripping tool as possible without interfering with the stripping operation; 60793-1-32 IEC:2010(E) 7 d) the guide shall
46、allow for easy insertion into the test set-up and for easy cleaning, and shall provide freedom from interference if the coating buckles. 4 Specimen preparation 4.1 Representative sample The sampling should consist of a minimum of 10 specimens assumed to be representative of the population of fibres
47、under evaluation. The specimens should be tested and their results will be averaged. 4.2 Strip length The length of fibre stripped on a particular piece can affect the strip force. However for 245 m nominal coating diameter fibres, the length of fibre stripped has minimal effect on the strip force.
48、The length of fibre stripped shall be specified in the detail specification. For 245 m nominal coating diameter fibres, a preferred value is 30 mm. For larger coating diameter, shorter stripping lengths are preferred, e.g. 15 mm. To perform the measurement a specimen of fibre must be provided that i
49、s longer than just the specified length to be stripped. The total specimen length consists of the fibre required to secure itself to the capstan, the fibre between the capstan and the stripping tool (see Figure 2) and the fibre length to be stripped that extends past the stripping tool (see Figure 1). The total specimen length shall be sufficiently long to meet this deployment. The test results are not dependent on the total sample length. The test results are,
