1、 EIA STANDARD TP-78B CAVITY-TO-CAVITY LEAKAGE BONDING INTEGRITY TEST PROCEDURE FOR ELECTRICAL CONNECTORS EIA-364-78B (Revision of EIA-364-78A) NOVEMBER 2010 EIA Standards Electronic Components Association ANSI/EIA-364-78B-2010 Approved: November 17, 2010 EIA-364-78BNOTICE EIA Engineering Standards a
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5、t 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 International Electrotechnical Commission activity has not progressed to the point where a valid comparison
6、between the EIA Standard and the IEC document can be made. This Standard does not purport to address all safety problems 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 t
7、o determine the applicability of regulatory limitations before its use. (From Standards Proposal No. 5205 formulated under the cognizance of the CE-2.0 National Connector and Socket Standards Committee) Published by: ELECTRONIC COMPONENTS ASSOCIATION 2010 EIA Standards and Technology Department 2500
8、 Wilson Boulevard Suite 310 Arlington, VA 22201 PRICE: Please call: Global Engineering Documents, USA and Canada (1-800-854-7179) http:/ All rights reserved Printed in U.S.A. ii PLEASE ! DONT VIOLATE THE LAW! This document is copyrighted by the EIA and may not be reproduced without permission. Organ
9、izations may obtain permission to reproduce a limited number of copies through entering into a license agreement. For information, contact: Global Engineering Documents 15 Inverness Way East Englewood, CO 80112-5704 or call USA and Canada (1-800-854-7179), International (303-397-7956) iii CONTENTS C
10、lause Page 1 Introduction . 1 1.1 Scope . 1 1.2 Applicable document . 1 2 Test resources 1 2.1 Equipment . 1 3 Test specimen 2 3.1 Description 2 3.2 Preparation 2 4 Test procedure . 2 5 Details to be specified . 3 6 Test documentation . 3 iv (This page left blank) v TEST PROCEDURE No. 78B CAVITY TO
11、- CAVITY LEAKAGE BONDING INTEGRITY TEST PROCEDURE FOR ELECTRICAL CONNECTORS (From EIA Standards Proposal No. 5205, formulated under the cognizance EIA CE-2.0 Committee on National Connector Standards, and was previously published in EIA-364-78A.) 1 Introduction 1.1 Scope This standard establishes a
12、technique for evaluating the sealing integrity of the contact cavity walls of an environmentally sealed electrical connector by detecting leakage between a given contact cavity and those adjacent to it. This technique is suitable for application at the onset of a series of environmental tests (e.g.,
13、 qualification or periodic inspection) to evaluate the soundness of the product before the start of test. 1.2 Applicable document The following document forms a part of this standard to the extent indicated herein. In the event of conflict between the requirements of this standard and the referenced
14、 document, this standard takes precedence. 1.2.1 Military Specification MS27448: Plug, End Seal, Electrical Connector 2 Test resources 2.1 Equipment 2.1.1 A source of clean filtered air or nitrogen, regulated within ilopascals (0.5 pound per square inch) of the specified test pressure, and equipped
15、with a suitable pressure indicator. 2.1.2 A hollow test probe suitably shaped to affect a seal against the unsealed end of a contact cavity under test while applying pressure inside the cavity. 2.1.3 A detector capable of sensing loss of pressure from the cavity under test. This detector may be as s
16、imple as a container of distilled water in which a leaking cavity would produce a stream of air bubble, or may involve a flow-sensitive transducer. If a flow-sensing transducer is employed, it shall be capable of detecting a leak rate of 1.6 x 104 cubic millimeters (1 cubic inch) of air per hour. EI
17、A-364-78B Page 2 3 Test specimen 3.1 Description The test sample shall consist of an unmated, unwired plug or receptacle connector. 3.2 Preparation 3.2.1 Each contact cavity shall be sealed at one end with a suitable seal selected from those defined in MS27488, to withstand a pressure differential o
18、f one atmosphere. Care shall be exercised to assure that the sealing technique chosen does not augment the native sealing capability of the cavity under test. 3.2.2 When installing sealing plugs in connector or module grommets; the head of the sealing plug shall be inserted first. The sealing plug s
19、hall then be pushed into the grommet until the head is positioned against the end of the unwired contact or empty grommet cavity. 3.2.3 After placement, the portion of the plug that protrudes outside the grommet can be cut off to 2.54 millimeters (0.100 inch) from the grommet face. 4 Test procedure
20、4.1 Adjust the pressure regulator to produce a test pressure of 10.34 kilopascals 3.44 kilopascals (1.5 pounds per square inch 0.5 pound per square inch). At set pressure, verify that test system does not leak prior to performing contact cavity leakage testing. 4.2 Insert the test probe into a conne
21、ctor contact cavity; apply the test pressure for 5 seconds to the cavity while observing the leakage detector for evidence of pressure loss from within the test cavity. 4.3 Unless otherwise specified as defined in 2.1.3, any evidence of pressure leakage from the cavity under test shall constitute a
22、failure of the cavity integrity leakage test. 4.4 Repeat this procedure until all of the connector cavities have been pressure-tested, unless otherwise specified in the referencing document. EIA-364-78B Page 3 5 Details to be specified The following details shall be specified in the referencing docu
23、ment: 5.1 The failure criterion, if other than as specified in 4.3 5.2 Diameter of test probes 5.3 Depth of insertion of the test probe 5.4 Test pressure 5.5 Cavities to be tested, if other than all 6 Test documentation Documentation shall contain the details specified in clause 5, with any exceptio
24、ns, and the following: 6.1 Title of test 6.2 Specimen description 6.3 Test equipment used, and date of last and next calibration 6.4 Test and procedure 6.5 Values and observations, including failed cavities, if any 6.6 Name of operator and date of test EIA Document Improvement Proposal If in the rev
25、iew or use of this document, a potential change is made evident for safety, health or technical reasons, please fill in the appropriate information below and mail or FAX to: Electronic Industries Alliance Standards and Technology Department 2500 Wilson Blvd. Suite 310 Arlington, VA 22201 FAX: (703-8
26、75-8908) Document No.: Document Title: Submitters Name: Telephone No.: FAX No.: e-mail: Address: Urgency of Change: Immediate: At next revision: Problem Area: a. Clause Number and /or Drawing: b. Recommended Changes: c. Reason/Rationale for Recommendation: Additional Remarks: Signature: Date: FOR EI
27、A USE ONLY Responsible Committee: Chairman: Date comments forwarded to Committee Chairman: Revision History Revision letter Project number Additions, changes and deletions B SP-5205 Revised paragraph 3.2.1 Deleted figure 1 and figure 2 Added paragraph 1.2, 3.2.2 and 3.2.3 Electronic Components Association 2500 Wilson Boulevard, Suite 310 * Arlington, VA 22201 * tel 703-907-8021 * fax 703-875-8908 www.ecaus.org
