1、 TIA-455-33-B (Revision of EIA-455-33-A) January 2005FOTP-33 Optical Fiber Cable Tensile Loading and Bending Test ANSI/TIA-455-33-B-2005 APPROVED: JANUARY 10, 2005 REAFFIRMED: AUGUST 2, 2013 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminati
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19、 THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA-455-33-B FOTP-33 OPTICAL FIBER CABLE TENSILE LOADING AND BENDING TEST Contents Section Page Foreword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii 1. I
20、NTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2. NORMATIVE REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3. APPARATUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4. SAMPLING AND SPECIMENS . . . . . . . . . .
21、 . . . . . . . . . . . . . . 3 5. PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6. CALCULATIONS OR INTERPRETATIONS OF RESULTS . . . 6 7. DOCUMENTATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8. SPECIFICATION INFORMATION . . . . .
22、. . . . . . . . . . . . . . . . 7 ANNEX A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8Page i TIA-455-33-B This page left blank Page ii TIA-455-33-B FOTP-33 OPTICAL FIBER CABLE TENSILE LOADING AND BENDING TEST Foreword (This foreword is informative only
23、and is not a part of this standard.) (From EIA Standard Proposal No. 4870, formulated under the cognizance of the TIA FO-6.7 Subcommittee on Optical Fiber Cable.) NOTE: This FOTP was previously published in Recommended Standard EIA-455-33. This FOTP is a part of the series of test procedures include
24、d within Recommended Standard TIA/EIA-455. Key Words: tensile test optical fiber cable tensile test Page iii TIA-455-33-B This page left blank Page iv TIA-455-33-B FOTP-33 OPTICAL FIBER CABLE TENSILE LOADING AND BENDING TEST 1. INTRODUCTION This test is intended to verify the ability of an optical f
25、iber cable to perform satisfactorily as required by Detail Specifications (a) while undergoing tensile and bending forces and (b) after undergoing tensile and bending forces. NOTE: This procedure is frequently used in concert with FOTP-38, Measurement of Fiber Strain in Cables Under Tensile Load. Us
26、ers are cautioned that the Detail Specification generally inserts specific steps from FOTP-38 into the procedure of this FOTP. 2. NORMATIVE REFERENCES The following documents form a part of this FOTP to the extent specified herein: EIA/TIA-455-B Standard test procedures for fiber optic fibers, cable
27、s, transducers, sensors, connecting devices and other fiber optic components FOTP-20 (TIA/EIA-455-20A) Measurement of Change in Optical Transmittance FOTP-38 (TIA/EIA-455-38) Measurement of Fiber Strain in Cables Under Tensile Load FOTP-61 (TIA/EIA-455-61A) Measurement of Fiber or Cable Attenuation
28、Using an OTDR FOTP-78 (TIA/EIA-455-78B) Spectral Attenuation for Cutback Measurements for Single-mode Optical Fibers 3. APPARATUS 3.1 A suitable device for measuring optical power transmission is required. (See paragraph 5.3). 3.2 A suitable device is necessary to apply a tensile load to the test ca
29、ble. An example of the basic testing apparatus and test set-up is shown schematically, in Figure 1. Unless otherwise specified by the Detail Specification, the test equipment shall be as specified in 3.2.1-3.2.7: Page 1 TIA-455-33-B Pulling Gear Direction of Applied Force Cable Ends 15 25 m typical(
30、50 80 ft) B A Fixed MandrelRotating Sheaves Load Cell Optical Test EquipmentFIGURE 1- Optical Fiber Cable Tensile Loading and Bending Test 3.2.1 One end of the test apparatus (End B) shall essentially consist of a minimum of three rotating sheaves mounted on an axle. 3.2.2 The other end of the test
31、apparatus (End A) shall essentially consist of a minimum of two rotating sheaves mounted on an axle. 3.2.3 Unless otherwise specified by the Detail Specification, the sheave diameter shall be less than or equal to 40X the cable outside diameter. For cables less than 14 mm (0.55 in) in outer diameter
32、, a universal sheave diameter of 560 mm (22 in) may be used. 3.2.4 Two fixed-position mandrels shall be used, one on each end of the cable sample under test, to couple the optical fibers to the other cable components, and to apply the tensile force to the cable. Note: Another common test set-up is t
33、o mount the fixed mandrels on the same movable axel as the sheaves specified in 3.2.2. See subclause 5.6 for guidance on loading different test set-up configurations. 3.2.5 The mandrels used to couple the fiber and cable shall be large enough to avoid inducing loss in the cable wrapped around them.
34、Page 2 TIA-455-33-B 3.2.6 The length between ends A and B (see Figure 1) of the test apparatus shall be such that a minimum total sample length of 100 meters (330 feet) can be achieved with a minimum of five turns of cable. 3.2.7 The tensile load shall be applied by a tensile machine or similar devi
35、ce, with the applied force measured by a load cell or dynamometer having a minimum accuracy of 5% of the total tensile load to be applied. NOTE: Alternative test configurations are acceptable provided that the required total length to be stressed can be accommodated and the required tensile loads ca
36、n be attained and properly distributed throughout the cable. For example, additional sheaves could be used with more strands to reduce the total length of the apparatus; also, all sheaves could be mounted on fixed shafts with force applied to pull only one cable end. 4. SAMPLING AND SPECIMENS The ca
37、ble length under tensile load shall be as per 3.2.6. 5. PROCEDURE 5.1 Overview 5.1.1 Measurement condition definitions Test Condition Designation TEST SPECIMEN CONFIGURATION I II III Unloaded (before any loading) X Loaded (load applied) X Cable Specimen in test configuration (wound on sheaves and ma
38、ndrels per Figure 1) Unloaded (after load has been relieved) X Page 3 TIA/EIA-455-33-B 5.1.2 Test Conditions 5.1.2.1 Test Condition I provides the optical power transmission of the cable in the extended, non-loaded condition on the tensile tester. 5.1.2.2 Test Condition II is used to determine optic
39、al changes produced by continuous (static) loading as might be expected during cable use. Test Condition II may be a single load or a set of loads. The default Test Condition II loading for this procedure is to apply the lowest load subsequently followed by increasingly higher loads at which optical
40、 measurements are to be made. In cases where a high load is designed to represent a rated installation load, and a correspondingly lower load is to represent post-installation loading, the higher load shall be applied first. Note: Results from Test Condition II allow a comparison and points out chan
41、ges in optical power transmission and attenuation between the non-loaded versus loaded test conditions. 5.1.2.3 Test Condition III is a check to assure that any changes induced by short-term loading are reversible. 5.1.3 Measurement conditions and performance limits shall be as established by approp
42、riate individual Detail Specifications, depending upon design and intended application of the particular fiber optic cable. 5.2 Unless otherwise specified, the test cable shall be preconditioned for 24 hours at standard atmospheric conditions as outlined in Recommended Standard EIA/TIA-455B and test
43、ed under these conditions. 5.3 Attenuation Change Measurement The cable shall be prepared and tested to check for changes in optical transmittance in accordance with FOTP-20. Alternatively, methods that measure attenuation such as FOTP-78 may be used and the results converted to transmittance values
44、. Methods other than FOTP-20 shall be used only if they provide procedures for measuring at specific wavelengths and are capable of accurately measuring attenuation/transmittance differences smaller than the requirements of the Detail Specification (refer to Paragraphs 5.5 through 5.8) while the cab
45、le undergoes the Tensile Loading Test. 5.4 Set Up for All Test Conditions 5.4.1 Feed the cable through and around the sheaves and mandrels. The minimum 100 meters (330 feet) tensile load length would involve at least five sheaves and two mandrels for a minimum total of five turns of cable between th
46、e two ends of the test apparatus. Make a sufficient number of turns (three turns minimum are recommended) of the cable around both fixed mandrels to ensure that the cable will remain in place without slipping during tensile Page 4 TIA-455-33-B loading. Note that it is intended that the cable cross-s
47、ection should remain fixed during the test (e.g., core should not slip within the jacket). Allow for a short length of cable (approximately 4 meters or approximately 15 feet) at both cable ends to permit accessing optical test equipment. After the cable length is in place, the cable weight will prod
48、uce a slight tension, which should not exceed 1% of the total test load. 5.4.2 Attach both ends of the cable to the optical test equipment. 5.5 Test Condition I Using the test set up of paragraph 5.4, and with no tensile load applied to the cable, measure the optical power transmission in accordance
49、 with paragraph 5.3. 5.6 Test Condition II Apply the tensile load specified by the Detail Specification (See 5.6.1 5.6.3). If more than one load is to be applied, apply the minimum load first, unless otherwise specified in the Detail Specification. In applying the load, ensure that each strand is subjected to the specified load. Unless otherwise specified, the time needed to reach this required load must be sufficient to prevent jerking or any near-instantaneous loading. Maintain the required load for the specified period of time. After the appropriate time, and with the sp
