1、 TIA-455-14-A (Revision of EIA/TIA-455-14)March 1992 (r 01/2012) FOTP-14 Fiber Optic Shock Test (Specified Pulse) NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating inter
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22、NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. Section 1. 2. 3. 4. 5. 6. 7. 8. ANNEX A ANNEX B APPENDIX TABLE I TABLE II FIGURE 1 FIGURE 2 FIGURE 3 FTP-14 FIBER OPTIC SHOCK TEST (SPECIFIED PULSE) TABLE OF CONTENTS Paqe INTRODUCTION 1 APPLICABLE DOCUMENTS 2 APPARATUS SAMPLNG AND SPECIMENS 3 PROCED
23、URE 4 CALCULATIONS OR INTERPRETATION OF RESULTS 6 DOCUMENTATION i SPECIFICATION INFORMATION 8 APPARATUS DETAILS AND CALIBRATION REQUIREMENTS 12 REQUIREMENTS FOR SHOCK PULSES 15 COMPARISON BETWEEN FOTP-14 AND IEC, ISO, AND CCITT REQUIREMENTS 17 TEST CONDITION VALUES 5 PREFERRED NUMBER OF SHOCKS 6 TOL
24、ERANCES FOR HALF SINE SHOCK PULSE 9 , TOLERANCES FOR TERMINAL-PEAK SAWTOOTH SHOCK PULSE 10 FREQUENCY RESPONSE 11 TOLERANCE LIMITS FOR MEASURING SYSTEM E 1 EIA TIA-455-14A 92 W 3234600 050L107 3 W 1 _ EIA/TIA-455-14A Page 1 FOTP-14 FIBER OPTIC SHOCK TEST (SPECIFIm PULSE) (From EIA Standards Proposal
25、No. 2363, formulated under the cognizance of TIA FO-6.3, Subcommittee on Fiber Optic Interconnecting Devices, and TIA FO-6.4, Subcommittee on Fiber Optic Test Methods and Instrumentation.) This FOTP is part of the series of test procedures included within Recommended Standard EIA/TIA-455. NOTE : Thi
26、s FOTP was originally published in EIA RS-455-14 as FOTP-14. 1. INTRODUCTION 1.1 Intent. The intent of this test is to determine the ability of fiber optic components (such as interconnecting devices) to withstand shocks such as those expected from rough handling, transportation, and military operat
27、ions b 1.2 Failure Modes. Potential failure modes for this test include, but are not limited to: a. Cracking, breaking, or loosening of parts, b. Optical discontinuity, c. Changes in optical transmittance during and after shock. This method is similar to Method 2004.1 of MIL-STD-1344. EIA TIA-455-14
28、A 92 m 3234600 0501108 5 = EIA/TIA-455-14A Page 2 specified herein: EIA/TIA-455-A 2. APPLICABLE DOCUMENTS The followincr documents form a part of this FOTP to the extent “Standard Test Procedures for Fiber Optic Fibers, Cables, Transducers, Sensors, Connecting and Terminating Devices, and Other Fibe
29、r Optic Components II FOTP-13 (EIA-455-13) FOTP-20 (EIA/TIA-455-20A) FOTP-32 (EIA/TIA-455-32A) MIL-STD-1344A3 Method 2004.1 MI L-STD- 8 1 OD3 Method 516.3 4 IEC-874-1, 3rd Ed. IEC-68-2-27, 3rd Ed. “Visual and Mechanical Inspection of Fiber, Cables, Connectors and/or Other Fiber Optic Devices“ llMeas
30、urement of Change in Optical Transmittance If Fi ber Optic Circuit Di s cont inui t ie s I “Test Methods for Electrical Connectors“ llshock ( Specified Pulse) llEnvironmental Test Methods and Engineering GuidelinesIf Shock“ “Connectors for optical fibres and cab les It “Basic Environmental Testing P
31、rocedures. Part 2: Tests - Test Ea and guidance: Shockff In process of preparation. Pending publication of this revision, use EIA RS-455-20. Available from Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, or from the procuring activity, or as directed
32、by the contracting officer. In process of preparation. Pending publication of this revision, use IEC SC86B(Central Officel69, dated July 1989. EIA TIA-455-14A 92 3234600 050LL09 7 -_- - EIA/TIA-455-14A Page 3 3. APPARATUS The following apparatus and equipment is required toI perform this test: 3.1 S
33、hock Machine. of producing the specified input shock pulse as shown in Figures 1 or 2, as applicable. The shock machine may be of the free fall, resilient rebound, nonresilient, hydraulic, compressed gas, or other activating types. Refer to Annex A for shock machine calibration requirements. The sho
34、ck machine utilized shall be capable . 3.2 Shock Machine Instrumentation. Use appropriate shock measuring instrumentation to verify that the correct input shock is applied to the test specimen. Refer to Annex A for additional instrumentation details and for calibration information. 3.3 Other Equipme
35、nt. Optical and other test and inspection equipment shall be available as required by FOTPs -13,-20 and/or -32, as appropriate. Refer to the required FOTP for details. e 4. SAMPLING AND SPECIMENS 4.1 Samples. Select samples randomly from production lots of the component to be tested. Unless otherwis
36、e specified by the Detail Specification, test -specimens shall be fully assembled (mated, if a connector) fiber optic components with appropriate test cables attached. 4.2 Specimen Mounting. After completing procedure steps 5.1 and 5.2, the test specimen (mated or unmated) shall be prepared and . mo
37、unted with accessories as specified in the Detail Specification and fastened to the table of the shock testing machine. Whenever possible, the test load shall be distributed uniformly on the test platform in order to minimize the effects of unbalanced loads. i EIA TIA-i.155-Li.1A 72 323i.1600 050LL1
38、0 3 EIA/TIA-455-14A Page 4 5. PROCEDURE 5.1 Apparatus Set-up. Refer to the Detail Specification to determine the type of shock pulse (half-sine or sawtooth) to be utilized for the test. If the shock pulse type is not specified, use the half-sine pulse. Before attempting to test any item, verify that
39、 the test apparatus (shock machine and shock measuring instrumentation) has been properly Set-up and calibrated to perform the prescribed test. Refer to Annex A and to Annex B for general requirements. 5.2 Pre-Test Inspection. Before installing the specimen(s) in the shock test equipment, make a vis
40、ual and physical examination of each specimen in accordance with FOTP-13 to assure that specimens have not been obviously damaged before test. 5.3 Specimen Mounting. Fasten the specimen(s) to the table of the shock testing machine, as described in 4.2. Unless otherwise specified in the Detail Specif
41、ication, if the test specimen, is normally mounted on vibration isolators, the isolators shall be functional during the test. 5.4 Pre-Shock Measurements. Perform any pre-shock optical tests (e.g., optical transmittance in accordance with FOTP-20, optical discontinuities in accordance with FOTP-32) r
42、equired by the Detail Specification. 5.5 Conduct Shock Test. Operate the shock test machine for the test severities specified in the Detail Specification. Refer to Table I for standard test options (duration, peak acceleration value, waveform). The specified test pulse (half-sine or sawtooth pulse)
43、shall be in accordance with Figures 1 and 2 respectively (as stated in 5.1, the half-sine pulse applies if waveform is not specified by the Detail Specification). The pulse shall have a duration and peak value in accordance with one of the test conditions shown in Table I. If not specified in the De
44、tail Specification, Test Condition Letter A shall apply. Refer to Table II for the preferred numbers of shocks to be . delivered. If not specified by the Detail Specification, three shocks in each direction shall be applied along the three mutually perpendicular axes of the test specimen (18 shocks)
45、. 4 o b EIA/TfA-455-14A Page 5 TABLE I TEST CONDITION VALUES Test Peak Values Normal Velocity- Condition (g level) Duration Waveform Change (V) Letter (d) ms m/s (ft1.s) A 50 11 - Half -sine 3.44 (11.3) 75 6 Half -sine 2.80 ( 9.6) B C 100 6 Half -sine 3.75 (12.3) D5 300 3 E 50 11 Half -sine 5.61 (18
46、.4) Sawtooth 2.68 ( 8.8) 6 Sawtooth 2.19 ( 7.2) F 75 G 100 6 Sawtooth 2.96 ( 9.7) Half -sine 2.07 ( 6.8) H 30 11 I 30 11 Sawtooth 1.62 ( 5.3) J 30 18 Half -sine 3.44 (11.3) K 50 11 Half - sine 3.44 (21.3) L 100 6 Half -sine 3.75 (12.3) Half - sine 3.18 (10.4) M 500 1 For test condition D, where the
47、weight of multi-specimen and fixtures exceed 68 kg (or 150 lb), there is a question as to whether the shock pulse is properly transmitted to all specimens. Due consideration shall be given to the design of the test fixture to assure the proper shock input to each specimen. .EIA TIA-455-14A 32 323460
48、0 0501112 7 EIA/TIA-455-14A Page 6 TABLE II PREFERRED NUMBER OF SHOCKS Shocks Per Axis Total and Direction Shocks 1 3 5 10 6 18 30 60 5.6 Measurements During and Following Shock Testing. The measurements made during or after the test shall be as specified in the Detail Specification. As specified in
49、 5.4, make measurements of change in optical transmittance in accordance with FOTP-20, and verify optical discontinuities by the method described in FOTP-32. After final optical measurements have been made, remove the specimen(s) from the shock test machine. 5.7 Post-Test Inspection. After removing the specimen(s) from the shock test equipment, make a visual and physical examination of each specimen in accordance with FOTP-13 to assure that specimens have not been obviously damaged mechanically by the test. 6. CALCULATIONS OR INTE3PRETATION OF RESULTS 6.
