BS EN 60512-2-1-2002 Connectors for electronic equipment - Tests and measurements - Electrical continuity and contact resistance tests - Test 2a - Contact resistance - Millivolt le.pdf

1、BRITISH STANDARD BS EN 60512-2-1:2002 Connectors for electronic equipment Tests and measurements Part 2-1: Electrical continuity and contact resistance tests Test 2a: Contact resistance Millivolt level method The European Standard EN 60512-2-1:2002 has the status of a British Standard ICS 31.220.10

2、BS EN 60512-2-1:2002 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 30 September 2002 BSI 30 September 2002 ISBN 0 580 40468 4 National f

3、oreword This British Standard is the official English language version of EN 60512-2-1:2002. It is identical with IEC 60512-2-1:2002. The UK participation in its preparation was entrusted by Technical Committee EPL/48, Electromechanical components and mechanical structures for electronic equipment,

4、to Subcommittee EPL/48/2, Connectors for electronic equipment, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred

5、 to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provision

6、s of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or

7、proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover. The BSI copyright date dis

8、played in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 60512-2-1 NORME EUROPENNE EUROPISCHE NORM April 2002 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Elec

9、trotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60512-2-1:2002 E ICS 31.220.10 English version Connector

10、s for electronic equipment Tests and measurements Part 2-1: Electrical continuity and contact resistance tests Test 2a: Contact resistance Millivolt level method (IEC 60512-2-1:2002) Connecteurs pour quipements lectroniques Essais et mesures Partie 2-1: Essais de continuit lectrique et de rsistance

11、de contact Essai 2a: Rsistance de contact - Mthode du niveau des millivolts (CEI 60512-2-1:2002) Steckverbinder fr elektronische Einrichtungen Mess- und Prfverfahren Teil 2-1: Prfungen des elektrischen Durchgangs und Durchgangswiderstands - Prfung 2a: Durchgangswiderstand - Millivoltmethode (IEC 605

12、12-2-1:2002) This European Standard was approved by CENELEC on 2002-04-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bib

13、liographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibil

14、ity of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Lu

15、xembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.NE 065-21-2:12002 - 2 - Foreword The text of document 48B/1130/FDIS, future edition 1 of IEC 60512-2-1, prepared by SC 48B, Connectors, of IEC TC 48, Electromechanical components and mechanical structures f

16、or electronic equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60512-2-1 on 2002-04-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (d

17、op) 2003-01-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2005-04-01 _ Endorsement notice The text of the International Standard IEC 60512-2-1:2002 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6051221:2002065-2

18、1-21 EI:C0022 3 CONNECTORS FOR ELECTRONIC EQUIPMENT TESTS AND MEASUREMENTS Part 2-1: Electrical continuity and contact resistance tests Test 2a: Contact resistance Millivolt level method 1 Scope and object This part of IEC 60512, when required by the detail specification, is used for testing electro

19、mechanical components within the scope of IEC technical committee 48. This test may also be used for similar devices when specified in a detail specification. The object of this test is to define a standard test method to measure the electrical resistance across a pair of mated contacts or a contact

20、 with a measuring gauge. 2 General measuring requirements Measurements may be carried out with direct current or alternating current. For a.c. measure- ments, the frequency shall not exceed 2 kHz. In case of dispute, the d.c. measurements shall govern. The accuracy of the measuring apparatus shall b

21、e such that the total error does not exceed 1 %. 3 Method of measurement 3.1 Measurement details The contact resistance shall be derived normally from the voltage drop measured between the zones intended for connection of the wiring to the contacts at the points specified in the detail specification

22、. The contact shall not be operated while the measuring voltage is applied. Care must be taken during the measurement to avoid exerting abnormal pressure on the contacts under test and to avoid movement of the test cables. Where the connection points specified in the detail specification are not dir

23、ectly accessible, the resistance of the cable or wire used shall be subtracted from the measured value. The corrected value shall be recorded. The contacts to be measured shall be chosen in accordance with the detail specification. 3.2 Test current and voltage The test voltage shall not exceed 20 mV

24、 d.c. or peak voltage a.c. in order to prevent the breakdown of possible insulating films on the contacts. The test current shall not exceed 100 mA, a.c. or d.c. Page3 EN6051221:2002065-21-21 EI:C0022 4 4 Measuring cycles 4.1 Measurement with direct current One measuring cycle consists of: a) applic

25、ation of the voltage; b) measurement with current flowing in one direction; c) measurement with current flowing in the opposite direction; d) disconnection of the voltage source. 4.2 Measurement with alternating current One measuring cycle consists of: a) application of the voltage; b) making the me

26、asurement; c) disconnection of the voltage source. NOTE Unless otherwise specified, the contact(s) made should not be disturbed between the end of the preceding test and the application of the voltage in this test. 5 Requirements The value of the contact resistance shall not exceed, for any measurem

27、ent, the value specified in the detail specification. The contact resistance measurement with d.c. shall be the average of the two readings obtained with forward and reverse current. Use of the following equation will ensure that the calculated resistance is always correct: r f r m mf I I V V R NOTE

28、 In the equation, the sign of the voltage measurements must be included. where R is the resistance; V mfis the measured forward voltage; V mris the measured reverse voltage; I f is the forward current; I ris the reverse current. NOTE Any deviation from the standard test procedure should be clearly i

29、ndicated in the test report. Page4 EN6051221:2002065-21-21 EI:C0022 5 6 Details to be specified When this test is required by the detail specification, the following details shall be specified: a) the measuring points; b) the number of contacts to be measured; c) the permissible limits of contact re

30、sistance; d) any deviation from the standard test method. _ Page5 EN6051221:2002BS EN 60512-2-1:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Eu

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