1、 IEC 60793-1-30 Edition 2.0 2010-05 INTERNATIONAL STANDARD Optical fibres Part 1-30: Measurement methods and test procedures Fibre proof test IEC 60793-1-30:2010(E) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2010 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no par
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8、serv If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csciec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 IEC 60793-1-30 Edition 2.0 2010-05 INTERNATIONAL STANDARD Optical fibres Part 1-30: Meas
9、urement methods and test procedures Fibre proof test INTERNATIONAL ELECTROTECHNICAL COMMISSION M ICS 33.180.10 PRICE CODE ISBN 978-2-88910-930-2 Registered trademark of the International Electrotechnical Commission 2 60793-1-30 IEC:2010(E) CONTENTS FOREWORD.3 INTRODUCTION.5 1 Scope.6 2 Normative ref
10、erences .6 3 Apparatus.6 3.1 General .6 3.2 Fibre pay out.6 3.3 Proof test region6 3.4 Fibre take-up.7 3.5 Load and unload7 3.6 Minimum bending radii 7 3.7 Typical equipment design7 3.7.1 Introduction .7 3.7.2 Braked capstan type7 3.7.3 Dead weight type.8 4 Sample preparation 9 5 Procedure 9 6 Calcu
11、lations Compensation for load-sharing by coating .10 7 Results.10 7.1 Test requirement .10 7.2 Information to be provided.10 7.3 Optional information 11 8 Specification information 11 Bibliography12 Figure 1 Braked capstan type 8 Figure 2 Dead weight type .8 60793-1-30 IEC:2010(E) 3 INTERNATIONAL EL
12、ECTROTECHNICAL COMMISSION _ OPTICAL FIBRES Part 1-30: Measurement methods and test procedures Fibre proof test FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees)
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23、andard IEC 60793-1-30 has been prepared by subcommittee 86A: Fibres and cables, of IEC technical committee 86: Fibre optics. This second edition cancels and replaces the first edition published in 2001 and constitutes a technical revision. The main change with respect to the previous edition is an i
24、mproved description of the procedure. 4 60793-1-30 IEC:2010(E) The text of this standard is based on the following documents: CDV Report on voting 86A /1288/CDV 86A/1313/RVC Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above t
25、able. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 60793-1-3x series, published under the general title Optical fibres measurement methods and test procedures, can be found on the IEC website. The committee has decided that the c
26、ontents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. A bilingual
27、 version of this publication may be issued at a later date. 60793-1-30 IEC:2010(E) 5 INTRODUCTION Publications in the IEC 60793-1 series concern measurement methods and test procedures as they apply to optical fibres. Within the same series, several different areas are grouped, but all numbers possi
28、bly not used, as follows: parts 1-10 to 1-19: General parts 1-20 to 1-29: Measurement methods and test procedures for dimensions parts 1-30 to 1-39: Measurement methods and test procedures for mechanical characteristics parts 1-40 to 1-49: Measurement methods and test procedures for transmission and
29、 optical characteristics parts 1-50 to 1-59: Measurement methods and test procedures for environmental characteristics 6 60793-1-30 IEC:2010(E) OPTICAL FIBRES Part 1-30: Measurement methods and test procedures Fibre proof test 1 Scope This part of IEC 60793 describes procedures for briefly applying
30、a specified tensile load as a proof test to continuous lengths of optical fibre. The tensile load is applied for as short a time as possible, yet sufficiently long to ensure the glass experiences the proof stress, typically much less than one second. This method is applicable to types A1, A2, A3 and
31、 B optical fibres. The object of this standard is to establish uniform requirements for the mechanical characteristic fibre proof test. 2 Normative references None. 3 Apparatus 3.1 General There are several possible machine designs, all of which perform the basic functions required for measuring fib
32、re proof with the indicated general operating requirements. Care should be used in the design so as to prevent coating damage. Two machine types are used: braked capstan type; dead weight type. Either machine may be used during the fibre-drawing process (on-line for coated fibre only), or as a separ
33、ate process step (off-line). NOTE There are dynamics with on-line screening, (different from off-line screening), which should be taken into account. 3.2 Fibre pay out Isolate the tensile load variations from the proof test region so as not to cause variations in the proof load. Do not permit the ap
34、plied proof stress to fluctuate below the value specified in the detail specification. 3.3 Proof test region With the exception of additional bend stress of up to 10 % of the proof stress, apply the proof stress uniformly through the cross-sectional area of the test sample. Ensure that the load- bea
35、ring members in this region are rigid (e. g. made of steel or aluminium). During testing, the tension-producing mechanism(s) shall not allow the proof stress to fluctuate below the value specified in the detail specification. 60793-1-30 IEC:2010(E) 7 Proof testing requires that a constant stress be
36、applied sequentially along the full length of fibre. A break rate (failures per unit length) is statistically expected. It is carried out during fibre manufacturing, on-line as part of the fibre drawing and coating process, or off-line as part of the testing process. The stress history of proof test
37、 stressing is as follows: stress loading from near-zero to the proof test stress during a load time; constant proof test stress during a dwell time; stress unloading from the proof test stress back down to near-zero during an unload time. 3.4 Fibre take-up Isolate the tensile load variations from th
38、e proof test region so as not to cause variations in the proof load. Ensure that the applied proof stress does not fluctuate below the value specified in the detail specification. 3.5 Load and unload The load and unload regions occur on both sides of the proof test region. Tension in the fibre ramps
39、 up from being under constant low tension, in the pay-out region, to the full load in the proof test region. Tension in the fibre then ramps down, from the proof test region, to a constant low tension in the take-up region. The unload zone is the arc formed by the two tangent points in the guide whe
40、re the fibre finally leaves the loading area. (For example, unloading across 90 of a 150 mm diameter wheel at a speed of about 12 m/s yields an unloading time of about 10 ms.) Control the unload time to some maximum, agreed between user and manufacturer. Accomplish ramping up and ramping down as qui
41、ckly as possible. 3.6 Minimum bending radii All radii over which the test sample passes need to be of sufficient size so that the maximum stress and time at that stress shall not significantly degrade the strength of the sample. 3.7 Typical equipment design 3.7.1 Introduction The following examples
42、illustrate some typical designs. Other designs may be used, provided the operating requirements in 3.2 to 3.6 are met. 3.7.2 Braked capstan type A specific apparatus illustrating these requirements is shown in Figure 1. The fibre is paid out with constant low tension. The rewinding after the proof t
43、est is also done with constant tension. The levels of the pay-off and take-up tensions are adjustable. The proof test load is applied to the fibre between the brake and drive capstans by creating a speed difference between the capstans. Two belts are used to prevent slippage at the capstans. One des
44、ign can be that the high precision tension gauge measures the load on the fibre and controls the speed difference to achieve the required proof test load. The load level and operating speed of the equipment can be independently set. Another design can be that the difference in speeds between the two
45、 capstans is set and controlled directly according to the desired fibre elongation (strain), without tension measurements. NOTE The relationship between stress and strain can be found in IEC/TR 62048 (see Bibliography). 8 60793-1-30 IEC:2010(E) Precision tension gauge Brake capstan Drive capstan Dan
46、cer Dancer Fibre in proof test zone IEC 891/10 Fibre pay-off region Stage 1: Constant pay-off Proof testing region Stage 2: Proof testing with master and braking capstan and precision tension gauge Fibre take-up region Stage 3: Constant tension take-up spooling Figure 1 Braked capstan type 3.7.3 Dea
47、d weight type Another specific apparatus illustrating these requirements is shown in Figure 2. Pay out subassembly Pay out dancer pulley Dead weight (holder) Load arm Dead weight dancer pulley Pay out capstan Capstan pinch belts Take up subassembly Take up capstan Idler pulley Take up dancer pulley
48、IEC 892/10 Figure 2 Dead weight type 60793-1-30 IEC:2010(E) 9 This sub-assembly pays out fibre from a reel under constant low tension. The pay-out sub- assembly has various guide rollers and pulleys, plus a motorised traversing mechanism. The pay-out dancer pulley keeps the sample under just enough
49、tension to run straight and true to the proof test region, with minimum tension fluctuations. The pay-out capstan is the start of the proof test region. This capstan is driven and synchronized with the take-up capstan. Two belts are required to hold the fibre sample firmly against the pay-out and take-up capstans so that there is no slippage at the entrance to, and exit from, the proof test region. The dancer pulley may consist of two pulleys, one
