1、 2595532 0079695 IT3 m c EIA455.35 ADOPTION NOTICE EIA455.35, “Fiber Optic Component Dust (Fine Sand) Test“, was adopted on 19-SEP-95 for use by the Department of Defense (DoD). Proposed changes by DoD activities must be submitted to the DoD Adopting Activity: Commander, Defense Electronics Supply C
2、enter, 1507 Wilmington Pike, Dayton, OH 45444. DoD activities may obtain copies of this standard from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094. The private sector and other Government agencies may purchase copies from the Electronic Indust
3、ries Association, 2001 Pennsylvania Avenue, NW, Washington, DC 20006. Custodians: Army - CR Navy - AS Air Force - 85 DLA - ES Adopting Activities: (Proj ect 6 OGP- 022 9 - 03 ) DLA - ES FSC 60GP DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. Copyright Telecommunica
4、tions Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIAEIA ANSI/TIA/EIA-455-35A-1990 Approved: April 278 1990 Reaffirmed July 10, 1995 Reaffirmed October 14, 1999 STANDARD FOTP-35 Fiber Optic Component Du
5、st (Fine Sand) Test MAY 1990 TELECOMMUNICATIONS INDUSTRY ASSOCIATION *TE- INDUSTRY -TION Rcpmenting the iekcommuniatiom iadunry in assacialion wilh the Ekamnir Indusris Aiance Elistionic Industria Alliance Copyright Telecommunications Industry Association Provided by IHS under license with EIANot fo
6、r ResaleNo reproduction or networking permitted without license from IHS-,-,-E 3234b00 Ob44387 57T m NOTICE TIA/EIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeabi
7、lity and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards and Publications shall not in any respect preclude any member or nonmember of WIA from manufacturing or selling products
8、 not conforming to such Standards and Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than TIMEIA members, whether the standard is to be used either domestically or internationally. Standards and Publications are adopted by TMIA in
9、 accordance with the American National Standards Institute (ANSI) patent policy. By such action, MIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publication. This Standard does not purport to address all safety pro
10、blems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. (From Standards Proposal No. 3804, formulat
11、ed under the cognizance of the TiA FO-6.3 Subcommittee on Fiber Optic Interconnecting Devices) This document was reaffirmed by the American National Standards Institute (ANSI) on July 10,1995 and October 14,1999, and by the TIA. Published by ELECTRONIC INDUSTRIES ALLIANCE 1990 Engineering Department
12、 2500 Wilson Boulevard Arlington, VA 22201 TELECOMMUNICATIONS INDUSTRY ASSOCIATION PRICE: Please refer to current Catalog of PUBLICATIONS or call Global Engineering Documents, USA and Canada (1 -800-854-7 179) In ternational (303-397-7956) EIA ELECTRONIC INDUSTRIES ALLIANCE STANDARDS and ENGINEERING
13、 ? All rights reserved Printed in U.S.A. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-TIA/EIA-455-35A Page 1 FOTP-35 FIBER OPTIC COMPONENT DUST (FINE SAND) TEST (From EIA Sta
14、ndards Proposal No. 1894, 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
15、-455. NOTE: This FOTP was previously published in RS-455-35 as FOTP-35. 1.0 INTENT 1.1 The dust test is used to ascertain the ability of fiber optic components to resist the effects of a dry dust (fine sand) laden atmosphere. This test simulates the effect of sharp edged dust (fine sand) particles,
16、up to 150 vm in size, which may penetrate into cracks, crevices and joints. This test is applicable to all optical devices and to combinations of optical devices and mechanical, or electrical, electronic, electrochemical, electromechanical devices for which exposure to the effects of a dry dust (fin
17、e sand) laden atmosphere is anticipated. 1.2 General effects resulting from the penetration of dust can include a variety of damage such as fouling of moving parts, formation of electrically conductive bridges with resulting shorts, scratching of the optical surfaces of the fiber interfaces, and act
18、ing as a nucleus for collection of water vapor and, hence, a source of possible corrosion and malfunction of equipment. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-= 323LibO
19、O Ob44390 Oh4 = TIA/EIA-4,55-35A Page 2 2.0 REFERENCED DOCUMENTS Test or inspection requirements may include, but are not limited to, the following references: “Visual and Mechanical Inspection of Fiber, Cables, Connectors and/or Other Fiber Optic Devices“ 3.0 TEST EQUIPMENT 3.1 Test Facility The te
20、st facility shall consist of a chamber and accessories to control dust concentration and the velocity, temperature and humidity of dust-laden air. In order to provide adequate circulation of the dust-laden air, no more than 50% of the cross-sectional area (normal to the air flow) and no more than 30
21、% of the volume of the chamber shall be occupied by the test item(s). The chamber shall be provided with a suitable means of maintaining and verifying the dust concentration in circulation. A minimum acceptable means for doing this is by use of a properly calibrated smoke meter and a standard light
22、source. The dust laden air shall be introduced into the test space in such a manner as to allow it to become approximately laminar in flow before it strikes the test item. 3.2 Dust Requirements The dust used in this test shall be fine sand (97%-99% by weight of Si0 1 of angular structure, and shall
23、have the following size distribution, as determined by weight, using the U.S. Standard Sieve Series: (a) 100% of the dust shall pass through a 100-mesh screen, (b) 98 5 2% of the dust shall pass through a 140-mesh screen, (c) 90 f 2% of the dust shall pass through a 200-mesh screen, and (d) 75 f 2%
24、of the dust shall pass through a 325-mesh screen. NOTE : 140-mesh silica flour as produced by the Ottawa Silica Company, Ottawa, IL, or equivalent, is satisfaccory for use in the performance of these tests. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot f
25、or ResaleNo reproduction or networking permitted without license from IHS-,-,-W 3234600 O644393 TTO E 4.0 TEST SPECIMEN Unless otherwise specified: 4.1 4.2 4.3 5.0 TEST 5.1 5.2 5.3 5.4 A test specimen shall consist of a designated fiber optic component, prepared as intended for normal service, compl
26、ete with accessories. Connector specimens (or other components which incorporate connectors) shall consist of a mated connector pair, terminated as intended for normal service, and complete with accessories. The combined length of any device with attached cable shall be 2.0 2 0.1 m (6.6 $: 0.3 ft).
27、PROCEDURE Prepare the test specimen in accordance with Clause 4.0 and as may be directed by the Detail Specification. Unless otherwise specified, test item(s) shall be subjected to the following procedures while in the non-operating mode. If an operating-mode test is required, operating and measurem
28、ent instructions shall be provided by the Detail Specification. Position the test item(s) as near to the center of the test chamber as practicable. If more than one item is being tested, there shall be a minimum clearance of 100 mm (4 in) between surfaces of the test item(s) and any other material o
29、r object capable of furnishing protection. Also, no surface of the test item(s) shall be closer than 100 mm (4 in) from any wall of the test chamber. Orient the item(s) so as to expose the most critical or vulnerable parts to the dust stream. The test item orientation may be changed during the test
30、if required by the Detail Specification. Set the chamber controls to maintain an internal chamber temperature of 23 I 2OC (approx. 73F) and a relative humidity of less than 22%. Adjust the air velocity to 533 k 76 m per minute (1,750 f 250 ft per minute). Adjust the dust feeder to control the dust c
31、oncentration at 10.6 I 7.1 grams per cubic meter. Unless otherwise specified, maintain these chamber conditions for 6 hours. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3234
32、600 0644392 937 I TIA/EIA-455-35A Page 4 5.5 5.6 5.7 5.8 Upon completion of the 6 hour conditioning, stop the dust feed and reduce the air velocity to 91 2 61 m per minute (300 I 200 ft per minute). Raise the internal chamber temperature to 63 f 2OC (approx. 145OF). Maintain a relative humidity of l
33、ess than 10%. Unless otherwise specified, maintain these chamber conditions for 16 hours. Unless otherwise specified: (a) Upon completion of the 16 hour conditioning, maintain the chamber temperature at 63 f 2OC (approx. 145OF). (b) Adjust the air velocity to 533 f 76 m per minute (1,750 f 250 ft pe
34、r minute). (c) Adjust the dust feeder to control the dust concentration at 10.6 f 7.1 grams per cubic meter. (d) Maintain a relative humidity of less than 10%. (e) Maintain these chamber conditions for 6 hours. Turn off all chamber controls and allow the test item(s) to return to standard ambient co
35、nditions. Remove accumulated dust from the test item(s) by brushing, wiping or shaking, exercising care to avoid introducing any additional dust into the test item(s). Dust shall not be removed by either air blast or vacuum cleaning. In accordance with the requirements of FOTP-13, examine the test i
36、tem(s) and record observations as specified in the Detail Specification. In the performance of this inspection, carefully examine test items containing bearings, seals, lubricants, etc., for the presence of dust deposits. Prior to remating components as specified in FOTP-13, normal cleaning procedur
37、es may be employed to thoroughly remove any residual dust. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3234b00 Ob44393 873 TIA/ E IA-4 5 5 -3 5Li Page 5 6.0 DOCUMENTATION Te
38、st data sheets shall contain the following information: 6.1 Date and title of the test. 6.2 Identification of the fiber optic device (connector or other), attached fiber optic cable, and any other applicable data. 6.3 Test Equipment and date of calibration. 6.4 6.5 Results of specified examinations.
39、 Identification of test methods or procedures used. 6.6 Names of test personnel. FJG INFOl3l4&TION kawing details shall be specified in Pre-test and post-test data required. 7.2 7.3 7.4 7.5 7.7 7.8 Failure or acceptance criteria. Change in orientation during test, if required. (See 5.3.) Whether equ
40、ipment is to operate during test, and the length of time required for operation and measurements. (See 5.2, 5.4, 5.5 and 5.6.) Whether the second 6-hour test at 63OC (145OF) shall be performed immediately after reaching stabilization. (See 5.6.) Whether connectors are mated or unmated. (See 4.2.) Overall specimen length, if other than 2 m (6.6 ft). 4.3.) (See Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
