1、 TIA STANDARD Impact Test Measurements for Fiber Optic Devices TIA-455-2C (Revision of TIA-455-2B) February 2001 TELECOMMUNICATIONS INDUSTRY ASSOCIATION ANSI/TIA/EIA-455-2 C-1998 Approved: June 9, 1998 Reaffirmed: April 21, 2008 NOTICE TIA Engineering Standards and Publications are designed to serve
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6、 regulatory limitations before its use. (From Standards Proposal No. 3-3822, formulated under the cognizance of the TIA FO-4 Fiber Optics, FO-4.3 Subcommittee on Passive Optical Devices and Components.) Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Standards and Technology Department 2500 Wil
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22、DAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. STD*EIA TIA-455-2C-ENGL 1798 W 3234b00 ObL3b77 554 H TINE IA-455-2C FOTP-2 Impact test measurements for fi ber optic devices Contents Foreword 1 Introduction 2 Normative ref
23、erences 3 Apparatus 4 Sampling and specimens 5 Procedu res 6 7 Documentation 8 Specification information . 9 Informative References . Annex A - Comparison between this FOTP and IEC or ITU-T requirements Table I . Calculations or interpretation of results Table 2 . Figure I Figure 2 Figure 3 . 111 1
24、1 2 6 6 9 11 12 12 13 8 8 3 4 5 i - STD-EIA TIA-455-2C-ENGL 1998 I3234b00 OL13bO 27b I TINE IA-455-2C FOTP-2 Impact test measurements for fiber optic devices Foreword (This Foreword is informative only and is not part of this Standard.) This document comes from TIA Standards Proposal No. 3345, formu
25、lated under the cognizance of TIA-6, Committee on Fiber Optics and FO-6.3, Subcommittee on Fiber Optic interconnecting Devices. .- - This Specification forms a part of the series of test procedures included within Recommended Standard EIAL7A-455. NOTE - This FOTP was previously published in EIA/TIA-
26、455-2B as FOTP-2. There are two annexes, which are informative. Key words: impact, fiber optic devices, drop test, shock. iii Previous page is blank STD-EIA TIA-455-2C-ENGL 1998 R 3234bUO bL3b8L LO2 9 - TINEIA-455-2C 1 Introduction 1.1 Intent The intent of this test is to determine the ability of a
27、fiber optic component or assembly (device) to withstand impacts of the type that might be encountered in normal service. This test is normally intended to be performed only on devices designed to meet impact requirements. 1.2 Failure modes c- Typical indications of damage to a fiber optic device res
28、ulting from this test include, but are not limited to: - inability to mate or unmate, - broken parts or accessories, - power transmission change, - damage to seals. 2 Normative references Test or inspection requirements may include, but are not limited to, the following references: ASTM A 659-85, St
29、andard specification for steel, carbon (0.76 maximum to 0.25 maximum percent), hot-rolled sheet and strip, commercial quality. E IA/TIA-455-A, Standard fesf procedures for fiber optic fibers, cables, transducers, sensors, connecting and terminating devices, and other fiber optic components. FOTP-13
30、(EIA/TiA-455-13A), Visual and mechanical inspection of fiber, cable, connectors, and/or other fiber optic devices. FOTP-20 (EIA/TIA-455-20A), Measurement of change in optical transmittance. 1 TINE I A-4 55-2 C FOTP-61 (EIAlTIA-455-61 A), OTDR measurement of fiber or cable attenuation. IEC-I 300-2-1
31、2, I st Edition, 1995, Fibre optic interconnecting devices and passive components - basic test and measurement procedures - impact test. 3 Apparatus 3.1 Mechanical test apparatus The test apparatus shall be one of the following: NOTE - The original Method A is no longer considered a desirable test m
32、ethod and is not included in this FOTP. The test method does not represent the type of impact that a fiber optic device would experience in normal service. Detail Specifications should be revised to use alternative methods. The Method A described in the current FOTP is a new test method. - “)In proc
33、ess of revision. Pending publication of this revision, use EIAlTIA-455-61. 2 STD-EIA TIA-455-2C-ENGL B978 I 323YbE0 0513b3 T85 W TINEIA-455-2C 3.1.1 Method A Use a test fixture similar to that shown in Figure 1. The fixture shall consist of a clamp for securing cable pigtails and a steel block with
34、a 13 mm (0.5 in) minimum thickness. Clamp the cable pigtail so that, with the device hanging under its own weight, the end of the device extends to the center of the steel block. /- CLAMP DEVICE UNDER TEST i- I Figure I. impact test apparatus for Method A. 3 STD-EIA TIA-455-2C-EMGL 1778 II 3234b00 D
35、bB3b84 911 TINEIA-455-2C 0.60 m I 3.1.2 Method B 1 I / I I J I / / / / Use a test fixture similar to that shown in Figure 2, suitably designed to securely hold the cable at one end. Mount the fixture to a wall or other rigid structure at a height of 600 mm (24 in) above the impact surface. The impac
36、t surface shall be a concrete slab at least 100 mm (4 in) thick. Figure 2. Impact test apparatus for Method B. 3.1.3 Method C Use a test fixture similar to that shown in Figure 3. Unless otherwise specified, the weight of the drop impact carriage shall be 0.45 kg (1 Ib). The carriage shall freely sl
37、ide on the guide shafts. When properly secured, the sample under test shall not be damaged by the connector clamp fixture. The impact pad shall be a 3 mm (0.125 in) thick mild steel (Grade Designation 1020 per ASTM A 659) plate fastened to the base of the impact carriage. - 4 STD-EIA TIA-q55-2C-ENGL
38、 1998 M 3234bU0 UbL3b85.858 9 TINEIA-455-2C C -1.5 m- I I - I -0.30m -1 HEIGHT ADJUSTABLE CARRIAGE RELEASE IGUIDE SHAFT I IMPACTPAD 1 FOR FIBER OPTIC DEVICE 7 I 11.55 m I 1, I - -.0.46 m -1 Figure 3. Impact test apparatus for Method C. 5 STD-EIA TIA-455-2C-ENGL 1998 E 323Lib00 ObL368b 794 m TINE IA4
39、 55-2 C 3.2 Optical test apparatus - Use optical test equipment as specified in FOTP-20, or equipment listed in other test method(s) as specified in the Detail Specification. 4 Sampling and specimens A test sample shall consist of the component or device specified and shall be terminated to a cable
40、as intended for normal service, complete with accessories. Dust caps shall be attached to the fiber optic device before the test, unless otherwise specified in the Detail Specification. 4.1 MethodA Unless otherwise specified, the length of the cable shall be 1.5 m (4.9 fi). 4.2 Method B Unless other
41、wise specified, the length of the cable shall be 2 m (7 ft). - 4.3 Method C Unless otherwise specified, the length of the cable shall be 2 m (7 ft). 5 Procedures 5.1 Preconditioning Unless otherwise specified in the Detail Specification, precondition the test specimens for a minimum period of 24 hou
42、rs under the standard atmospheric condition of ElMIA- 455. 6 TINEIA-455-2C 5.2 Inspection Inspect the component or device before undergoing the test in accordance with the requirements of FOTP-13. 5.3 Transmittance measurements Measure and record the optical transmittance before the test using the m
43、ethods of FOTP-20, or using alternative methods as specified by the Detail Specification. Any optical surfaces that typically are cleaned before use (e.g., connector endfaces) shall be cleaned before the transmittance measurement is performed. 5.4 Impact test procedures using different methods . - P
44、erform the test as required by one of the following methods. 5.4.1 Method A Clamp the cable pigtail so that, with the device hanging under its own weight, the end of the device extends to the center of the steel block. Then raise the device to the height of the clamp, and with the cable extended, re
45、lease so as to strike the block. Drop the device eight times. The device should not be allowed to bounce, but restrained to only one impact. If specified in the Detail Specification, rotate the test specimen 45 degrees between successive drops. 5.4.2 Method B Securely fasten the cable attached to th
46、e sample component or device to the wall- mounted fixture such that the cable assembly can be fully extended. - Unless otherwise specified in the Detail Specification: 5.4.2.1 Drop the cable assembly repeatedly, observing the height sequence (highest drop first) and the number of drops as specified
47、in Table 1 for the designated service class. 5.4.2.2 Extend the cable assembly to its full length from the test fixture to a drop height specified in Table I. Allow the cable and the attached component or device to freely fall and strike the impact pad as shown in Figure I. The device should not be
48、allowed to bounce, but restrained to only one impact. If specified in the Detail Specification, rotate the test specimen 45 degrees between successive drops. 7 STD-EIA TIA-LI55-2C-ENGL 1998 D 3234b00 Ob23b88 5b7 II Drop Height i 6 mm (i 0.25 in.) Number of drops by service class Light Moderate Sever
49、e 2.4 m (8 ft) - 8 8 1.8 m (6 ft) 8 - 8 1.2 m (4 ft) - 8 8 0.6 m (2 ft) - - 8 - - 0.1 m (4 in) 8 Total Drops 8 16 40 TINE IA-455-2C 1 Table I - Drop height and number of drops for Method B Drop Height i 6 mm (i 0.25 in.) 0.9 m (3 ft) 0.6 m (2 ft) 0.3 m (1 ft) Number of drops by service class Light Moderate Severe - - 8 8 - 8 - - - 5.4.3 Method C Unless otherwise specified in the Detail Specification, securely fasten the sample component or device, with the cable attached, in the test fixture clamp such that the cable is horizontal with respect to the impact ca
