EIA ECA-364-91A-2005 TP-91A Dust Test Procedure for Electrical Connectors and Sockets.pdf

1、EIA STANDARD ANSIEIA-364-9 I A-2005 Approved: April I, 2005 TP-91A DUST TEST PROCEDURE FOR ELECTRICAL CONNECTORS AND SOCKETS EIA/E CA-3 64-9 1A (Revision of EIA-364-91) APRIL 2005 Elactronic Components, Assamblies 8 Materials Association ELECTRONIC COMPONENTS, ASSEMBLIES & MATERIALS AS SOCIATION THE

2、 ELECTRONIC COMPONENTS SECTOR OF THE ELECTRONIC INDUSTRIES ALLIANCE NOTICE EIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facilitating interchangeability and improvement of products, and

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4、 Publications, nor shall the existence of such Standards and Publications preclude their voluntary use by those other than EIA members, whether the standard is to be used either domestically or internationally. Standards and Publications are adopted by EIA in accordance with the American National St

5、andards Institute (ANSI) patent policy. By such action, EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the Standard or Publication. This EIA Standard is considered to have International Standardization implication, but the Intema

6、tional Electrotechnical Commission activity has not progressed to the point where a valid comparison between the EIA Standard and the IEC document can be made. This Standard does not purport to address all safetyproblems associated with its use or all applicable regulatory requirements. It is the re

7、sponsibility 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. 5060 formulated under the cognizance of the CE-2.0 National Connectors Standards Committee. Publish

8、ed by ELECTRONIC INDUSTIES ALLIANCE 2005 Technology Strategy & Standards Department 2500 Wilson Boulevard Arlington, VA 2220 1 PRICE: Please refer to the current Catalog of EIA Electronic Industries Alliance Standards and Engineering Publications or call Global Engineering Documents, USA and Canada

9、(1-800-854-7179) International (303-397-7956) All rights reserved Printed in U.S.A. PLEASE! DON?T VIOLATE THE LAW! This document is copyrighted by the EL4 and may not be reproduced without permission. Organizations may obtain permission to reproduce a limited number of copies through entering into a

10、 license agreement. For information, contact: Global Engineering Documents 15 Inverness Way East Englewood, CO 801 12-5704 or call U.S.A. and Canada 1-800-854-7179, International (303) 397-7956 CONTENTS Clause 1 1.1 2 2.1 2.2 3 3.1 3.2 4 5 6 Table A . 1 A.2 Introduction . Scope . Test resources Equi

11、pment . Material . Test specimen Description Preparation Test procedure . Details to be specified . Test documentation . Dust composition #I (Benign) Dust composition #2 (Corrosive) Annex A Dust composition (normative) A . 1 Benign composition A.2 Corrosive composition 1 1 1 2 2 2 2 3 4 4 A- 1 A-2 A

12、- 1 A- 1 A-2 i (This page left blank) 11 EIA-364-9 1 A Page 1 TEST PROCEDURE No. 91A DUST TEST PROCEDURE FOR ELECTRICAL CONNECTORS AND SOCKETS (From EIA Standards Proposal No. 5060, formulated under the cognizance EIA CE-2.0 Committee on National Connector Standards, and previously published in EIA-

13、364-9 1 .) 1 Introduction 1.1 Scope 1.1.1 This standard establishes a test method to determine the susceptibility of an electrical connector or socket system to the potential degradation mechanism of a dust/fiber environment common to an office or manufacturing area. 1.1.2 This method may be used as

14、 a preconditioning test whereby the test specimen is exposed to a heavy concentration of dust and then exposed to a subsequent environment or as a “stand alone” test. 1.1.3 This test should not be considered as an alternate or replacement for the EIA-364-50 (Sand and Dust Test Procedure for Electric

15、al Connectors and Sockets) that simulates an outdoor desert type environment. CAUTION - This procedure may involve hazardous materials, operations and equipment. This procedure does not purport to address ali safety problems associated with its use or all regulatory requirements. It is the .responsi

16、bility of the user of this procedure to establish appropriate safety and health practices and to determine the applicability of regulatory limitations before its use. 2 Test resources 2.1 Equipment 2.1.1 A dust chamber of sufficient size to allow the test specimens to be placed in the chamber with t

17、he clearances as indicated in 4.1. 2.1.2 An air blower system of sufficient size to maintain a flow rate of 300 meterdminute (i 000feet/minute) f 20%, unless otherwise specified in the referencing document. EIA-364-91A Page 2 2.1.3 A dust dispensing system capable of holding the volume of dust requi

18、red. 2.1.4 A timing circuit may be required for those situations where dust is to be applied in a time cycle mode. 2.1.5 Unless otherwise specified, the sir blower/dust dispensing system shall be capable of blowing the dust in a vertically upward direction from the bottom of the chamber to the top o

19、f the chamber. 2.1.6 The chamber attitude shall be such that when the blower is in an off condition, the dust shall fall by gravity to the bottom of the chamber into a collection area. 2.2 Material 2.2.1 Dust composition Unless otherwise specified in the referencing document, the specified dust comp

20、osition shall be one of those listed in table A.l or A.2. The dust composition shall not be reused in any subsequent test. 3 Test specimen 3.1 Description The referencing document shall specify if the test specimens are to be exposed mated or unmated. If unmated, it shall be specified if the recepta

21、cle, mating device or both is to be exposed. If not specified, only the connector normally exposed to the environment shall be tested unmated. 3.2 Preparation The test specimens shall be placed in the chamber in such a manner as not to be closer than 76 mm (3.0 inch) from the walls of the test chamb

22、er and not closer than 76 mm (3.0 inches) from the dust entry area. 3.2.1 The specimens shall be held in place using non-reactive materials in a manner allowing unobstructed air flow around said specimens. 3.2.2 If multiple specimens are to be exposed simultaneously, the specimens shall be placed so

23、 as not to be closer than 50 mm (2.0 inches) from each other. Multiple specimens shall be spaced side by side in a manner that does not prevent dust accumulation on or in the specimens. EIA-364-91A Page 3 3.2.3 The test specimens shall be exposed in their normal terminated state. 3.2.4 The test spec

24、imens shall be placed in the chamber in the orientation representing their application and shall be specified in the referencing document. 3.2.5 Prior to exposure, the dust composition to be used shall be placed in a tray or holding container and evenly spread. The dust shall then be placed in an ov

25、en and dried at 50 “C * 3 “C for 1 .O hour minimum. 3.2.6 Prior to exposure, the specimens to be tested shall not be cleaned unless the cleaning process is an actual part of the product application process of instructions. 4 Test procedure 4.1 The specimens shall be placed in the chamber in accordan

26、ce with clause 3, unless otherwise specified in the referencing document. 4.2 The mass of dust shall be 9 grams f 1 gram per cubic foot of chamber volume, unless otherwise specified in the referencing document. 4.3 After specimen placement, the air blower system shall be turned on. 4.4 specified in

27、the referencing document. The exposure duration shall be 1.0 hour +5.0 minutes / -0.0 minutes, unless otherwise 4.5 Upon completion of the exposure, the air blower system shall be turned off. The specimens shall not be removed from the chamber for a minimum of 1 .O hour. 4.6 Upon removal from the ch

28、amber, the specimens shall not be cleaned, wiped or have air blown on them. Specimens may be tapped at rate of 25.4 millimeters/second (1.0 incWsecond) on a flat surface typical of a laboratory bench, 5 times for removal by gravity of excess accumulation. 4.7 After completion of each exposure, the i

29、nterior of the chamber and dust delivery system shall be cleaned as much as practical. Brushing and vacuuming shall be sufficient. 4.8 Subsequent attribute monitoring or exposure to other environments shall, be in accordance with the referencing document. 4.9 This test shall be performed in a chambe

30、r at room ambient conditions as follows: - - Relative humidity: 70% Temperature: 25 “C * 7 “C ELA-364-91A Page 4 5 Details to be specified The following details shall be specified in the referencing document: 5.1 Dust composition #1 or #2, see table 1 or 2 5.2 Volume of dust 5.3 Subsequent tests 5.4

31、 Pasdfail criteria 5.5 Mated or unmated 6 Documentation Documentation shall contain the details specified in clause 5, with any exceptions, and the following: 6.1 Title of test 6.2 Specimen description including orientation, mating and termination conditions 6.3 Test equipment used, and date of last

32、 and next calibration 6.4 Test condition 6.4.1 Dust composition 6.4.2 Mass of dust 6.4.3 Duration 6.5 Visual observations and results 6.6 Name of operator and date of test EM-364-91A Page A-1 Paper fibers Cotton fibers Annex 3 3 -150 (diameter 12) 1 10-1500 (diameter 13) A Dust composition (normativ

33、e) I Polyester fibers Carbon black The dust compositions contained herein are classified as benign or corrosive. 1 2540 nom. (diameter 13) 1 6350 nom. (diameter 13) 1 7-1500 nom. (diameter 22) 1 2540 nom. (diameter 22) 1 6350 nom. (diameter 22) 1 .o 0.01 -0.02 A. 1 Benign composition The benign comp

34、osition should be considered for office environment applications in non- industrial areas or in filtered areas located in industrial areas. EIA-364-91A Page A-2 Particulate A.2 Corrosive composition Weight % Chemical Nomenclature The corrosive composition should be considered for corrosive industria

35、l applications both in sheltered and unsheltered atmospheres. Potassium nitrate 1 1.640 Table A.2 - Dust comDosition #2 (Corrosive) KNO? Potassium chloride Ammonium chloride Ammonium nitrate 2.250 KC 1 4.050 NH4C 1 6.050 “ANO? Magnesium nitrate hexahydrate Magnesium sulfate hepahydrate Feldspar Calc

36、ium sulfate Titanium dioxide 2.400 Mg(N03)2.6H20 34.600 MgS04. 7H20 18.800 CaO.Al203.2SiOz 3.080 Cas04 0.299 Ti07 Ferric oxide CuDric oxide 8.550 Fe203 1.420 Cu0 I NOTE - The size of the dust Darticle shall be of such a size as to Dass through a mesh size of 325. I Zinc oxide Paper fibers 1.130 ZnO

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38、ent - Publications Office 2500 Wilson Blvd. Arlington, VA 22201 FAX: (703-875-8906) Document No. Document Title: Submitters Name: Telephone No FAX No.: e-mail: Address: Urgency of Change: I Immediate: n At next revision: n Problem Area: a. Clause Number and/or Drawing: b. Recommended Changes: c. ReasoniRationale for Recommendation: Additional Remarks: Signature: Date: FOR EIA USE ONLY Responsible Committee: Chairman: Date comments forwarded to Committee Chairman: Electronic Industries Alliance