1、 TIA-455-104-B (Revision of TIA-455-104-A) February 2016FOTP-104 Fiber Optic Cable Cyclic Flexing Test ANSI/TIA-455-104-B-2016 APPROVED: FEBRUARY 3, 2016 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufact
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23、ANSI/TIA-455-104B i FOTP-104 FIBER OPTIC CABLE CYCLIC FLEXING TEST Foreword (This Foreword is informative and not part of the Standard.) This Standard is from Project Proposal No. ANSI/TIA-PN-455.104-B, formulated under the cognizance of the TIA TR-42.12 Subcommittee on Optical Fibers and Cables. Th
24、is FOTP forms a part of the latest revision of Recommended Standard TIA-455. NOTE: This FOTP was previously published in EIA Recommended Standard RS-455 as EIA/TIA-455-104. This revision updates references and editorial items including a comparison between the IEC and TIA methods, no technical chang
25、es were made. Key words: cyclic flexing. ANSI/TIA-455-104B ii This page blank. ANSI/TIA-455-104B 1 FOTP-104 FIBER OPTIC CABLE CYCLIC FLEXING TEST TABLE OF CONTENTS Section Page 1. Introduction 1 2. Applicable Documents 1 3. Apparatus 1 4. Sampling and Specimens 5 5. Procedure 6 6. Calculations or In
26、terpretation of Results 9 7. Documentation 9 8. Specification Information 10 Appendix Comparison between FOTP-104 and IEC Requirements Figure 1 Typical Cyclic Flexing Apparatus 3 Table I Sheaf Diameters 4 Table II Tensile Loading (Nonmilitary) 4 Table III Tensile Loading (U.S. Military Only) 4 ANSI/
27、TIA-455-104B 2 1 INTRODUCTION 1.1 Intent. The intent of this test is to determine the effects of repeated flexions on a fiber optic cable. These flexions may be performed at some specified temperature. 1.2 Scope. This procedure is designed to measure permanent and/or transient optical transmittance
28、changes and requires the assessment of any damage occurring to other cable components. 1.3 Failure Modes- Potential failure modes for this test include, but are not limited to: a. Loss of optical continuity, either during or at the end of the test, b. Degradation transmittance performance, c. Fiber
29、breakage or other physical damage, d. Other failure modes as may be stated in the Detail Specification. 2 APPLICABLE DOCUMENTS The following documents form a part of this FOTP to the extent specified herein: TIA-455 “Standard Test Procedures for Fiber Optic Fibers, Cables, Transducers, Sensors, Conn
30、ecting and Terminating Devices, and Other Fiber Optic Components“ FOTP-13 (TIA-455-13) “Visual and Mechanical Inspection of Fiber, Cables, Connectors and/or Other Fiber Optic Devices“ FOTP-20 (TIA-455-20) “Measurement of Change in Optical Transmittance“ IEC 60794-1-21 “Optical fibre cables Part 1-21
31、: Generic specification Basic optical cable test procedures Mechanical test methods” 3 APPARATUS The following apparatus and equipment is required to perform this test: 3.1 Device For Verifying The Number of Transmitting Fibers. If measurements of change in optical transmittance are not required, us
32、e any suitable equipment to determine the number of transmitting fibers. (Note: Wherever the term, “number of transmitting fibers,“ appears in this procedure, it shall be understood to mean the number of fibers displaying optical continuity.). 3.2 Device For Measuring Optical Power Transmission. If
33、measurements of change in optical transmittance are required, use a suitable device for measuring optical power transmission as described in FOTP-20. Operating wavelengths and modulation methods shall be as specified in the Detail Specification. 3.3 Flexing Device, Use a suitable flexing device, suc
34、h as illustrated in Figure 1. The flexing arm shall have an adjustable clamp or fixture to permit holding the cable securely during the entire test. The clamping fixture shall not crush the optical fibers during the test. Unless ANSI/TIA-455-104B 3 otherwise specified in the Detail Specification, th
35、e flexing arc shall be 90 from the reference position and the flexing speed shall be 30 cycles per minute. (Devices having adjustable flexing arcs and adjustable flexing speeds may be used if not prohibited by the Detail Specification, but the amount of swing of the cable shall be limited.) Figure 1
36、 Typical Cyclic Flexing Apparatus 3.4 Flexing Sheaves. (Note: The term, “sheaves“ as used throughout this procedure shall be understood to mean any appropriate flexing plates, mandrels, etc. used to control the configuration of the cable bend, and is not intended to require the use of true sheaves o
37、r grooved wheels.) Attach pairs of sheaves at a definite distance from the flex arm clamp, positioned such that they will not prevent free movement of the cable. It is recommended that there be 1 to 3 mm of clearance on each side between the cable and the sheaves in order to prevent undue friction o
38、n the cable at the flexing point. Use sheaves as shown in Figure 1 and as listed in Table I. Unless otherwise specified in the Detail Specification, the following default maximum values apply, in cases where the exact sheave diameter is not available a suitable sheave may be used such that its diame
39、ter is smaller than the stated maximum: 3.4.1 For all except U.S. Military applications, use sheaves per Table I, Sheave Designation Letter B. 3.4.2 For U.S. Military applications only, use sheaves per Table I, Sheaf Designation Letter E. ANSI/TIA-455-104B 4 Table I - Sheaf Diameters Sheaf Designati
40、on Letter Maximum Sheave Diameter as a Multiple of Cable Outside Diameter A As specified in the Detail Specification B 20XC 10XD 5XE 2.5X3.5 Force on the Cable or Load Weights (Mass). Apply sufficient force to the cable to keep it in contact with the sheaves while flexing. Manual force or weights ma
41、y be used. If flexing under specific tensile load is required, it shall be specified in the Detail Specification. When used, weights (mass) shall be attached to or suspended from the cable under test. The minimum load to be applied is usually dependent upon the outside diameter (and, to some extent,
42、 the stiffness) of the cable under test. Increase the load if necessary to ensure full quadrant contact of the cable with the sheaves during testing. Unless otherwise specified in the Detail Specification. 3.5.1 Unless otherwise specified, and for all except U.S. Military applications, manual force
43、or weights may be used. If weights are used, use the minimum weights specified in Table II. Table II - Sheaf Diameters Nominal Cable Diameter Range Minimum Load mm (in.) kg Weight N 2.5 ( 0.1) 1.5 14.712.6 to 4.0 (0.101 to 0.159) 2.5 24.524.1 to 6.0 (0.160 to 0.239) 4.0 29.236.1 to 9.0 (0.240 to 0.3
44、55) 4.5 44.139.1 to 13.0 (0.356 to 0.514) 5.0 49.0313.1 to 18.0 (0.515 to 0.711) 5.5 53.9418.1 to 24.0 (0.712 to 0.948) 6.5 63.7424.1 to 30.0 (0.949 to 1.180) 7.5 73.553.5.2 For U.S. Military applications only, use minimum weights as specified in Table III. Table III - Sheaf Diameters Nominal Cable
45、Diameter Range Minimum Load mm (in.) kg Weight N 2.5 ( 0.1) 5.0 49.032.6 to 6.5 (0.102 to 0.256) 10.0 98.076.6 to 13.0 (0.260 to 0.512) 12.5 122.5813.1 to 15.0 (0.516 to 0.591) 15.0 147.1015.1 to 18.0 (0.594 to 0.709) 17.5 171.6218.1 to 20.0 (0.713 to 0.787) 20.0 196.1320.1 to 23.0 (0.791 to 0.906)
46、22.5 220.65 23.1 ( 0.909) 25.0 245.17ANSI/TIA-455-104B 5 3.6 Environmental Chamber and Associated environmental chamber and/or associated equipment required for nonmilitary applications. For applications only, unless otherwise specified Specification. Use a suitable environmental chamber that has an
47、 operational range sufficient to provide the temperature extremes) specified in the Detail Specification. The chamber shall maintain the required temperature within 1 C ( 1.8 F) throughout the duration of the test. The chamber inside dimensions shall be sufficient to accommodate the physical test ap
48、paratus and the specimen under test, and to permit unrestricted air flow around the apparatus and specimen. The chamber shall be equipped with an access port (or stuffing box) through which the fiber or cable ends and instrument wires or other leads will exit the chamber. The access port shall adequ
49、ately seal the chamber around the extended cables, fibers, etc. that are exiting the chamber. 3.7 Temperature Recording Devices. If temperature recording is required (mandatory for U.S. Military applications, unless otherwise specified in the Detail Specification), the following criterion applies: Use temperature recording devices to provide a record of the temperature throughout the test. It may be desirable to have a multi-channel recorder so that thermocouples can be placed around the specimen to record its temperature. The recorder shall have an accuracy of
