EN 60512-2-2-2003 en Connectors for electronic equipment - Tests and measurements Part 2-2 Electrical continuity and contact resistance tests - Test 2b Contact resistance - Specifi.pdf

1、BRITISH STANDARD BS EN 60512-2-2:2003 Connectors for electronic equipment Tests and measurements Part 2-2: Electrical continuity and contact resistance tests Test 2b: Contact resistance Specified test current method The European Standard EN 60512-2-2:2003 has the status of a British Standard ICS 31.

2、220.10 BS EN 60512-2-2:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2003 BSI 31 July 2003 ISBN 0 580 42328 X National foreword This British Standard is the official English language version of EN 60512-2-2:2003.It is identical

3、 with IEC 60512-2-2:2003. The UK participation in its preparation was entrusted by Technical Committee EPL/48, Electromechanical components and mechanical structures for electronic equipment, to Subcommittee EPL/48/2, Connectors, which has the responsibility to: A list of organizations represented o

4、n this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or

5、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 provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immu

6、nity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them

7、 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 notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEURO

8、PEAN STANDARD EN 60512-2-2 NORME EUROPENNE EUROPISCHE NORM July 2003 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELE

9、C - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60512-2-2:2003 E ICS 31.220.10 English version Connectors for electronic equipment - Tests and measurements Part 2-2: Electrical continuity and contact resistance tests - Test 2b: Contact

10、resistance - Specified test current method (IEC 60512-2-2:2003) Connecteurs pour quipements lectroniques - Essais et mesures Partie 2-2: Essais de continuit lectrique et de rsistance de contact - Essai 2b: Rsistance de contact - Mthode du courant dessai spcifi (CEI 60512-2-2:2003) Steckverbinder fr

11、elektronische Einrichtungen - Mess- und Prfverfahren Teil 2-2: Prfungen des elektrischen Durchgangs und Durchgangswiderstands - Prfung 2b: Durchgangswiderstand - Mit vorgeschriebenem Strom (IEC 60512-2-2:2003) This European Standard was approved by CENELEC on 2003-07-01. CENELEC members are bound to

12、 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 bibliographical references concerning such national standards may be obtained on application to the Centra

13、l 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 responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same stat

14、us as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerlan

15、d and United Kingdom. Foreword The text of document 48B/1321/FDIS, future edition 1 of IEC 60512-2-2, prepared by SC 48B, Connectors, of IEC TC 48, Electromechanical components and mechanical structures for electronic equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENE

16、LEC as EN 60512-2-2 on 2003-07-01. 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 (dop) 2004-04-01 latest date by which the national standards conflicting with the EN have to be wi

17、thdrawn (dow) 2006-07-01 _ Endorsement notice The text of the International Standard IEC 60512-2-2:2003 was approved by CENELEC as a European Standard without any modification. _ Page2 EN6051222:2003 CONNECTORS FOR ELECTRONIC EQUIPMENT TESTS AND MEASUREMENTS Part 2-2: Electrical continuity and conta

18、ct resistance tests Test 2b: Contact resistance Specified test current method 1 Scope and object This part of IEC 60512, when required by the detail specification, is used for testing connectors for electronic equipment within the scope of IEC technical committee 48. This test may also be used for s

19、imilar 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 with a measuring gauge. 2 General measuring requirements Measurements may be carried out with direct

20、current or alternating current. For a.c. measure- ments, the frequency shall not exceed 2 kHz. In the case of dispute, the d.c. measurements shall govern. The uncertainly of the measuring apparatus shall not exceed 1 %. 3 Method of measurement 3.1 Measurement details The contact resistance shall be

21、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. The contact shall not be operated while the measuring voltage is applied. Care must be taken during the measurement to avoid ex

22、erting abnormal pressure on the contacts under test and to avoid movement of the test cables. Where the measuring points specified in the detail specification are not directly accessible, the resistance of the cable or wire used shall be subtracted from the measured value. The corrected value shall

23、be recorded. The contacts to be measured shall be chosen in accordance with the detail specification. 3.2 Test current and voltage The contact resistance shall be measured with the alternating current or direct current as specified in the detail specification. The test voltage shall be at least 1 V

24、d.c. or a.c. peak. Measurements shall be made on individual contacts within the minute following application of the test current. Page3 EN6051222:2003 4 Measuring cycles 4.1 Measurement with direct current One measuring cycle consists of a) application of the voltage; b) measurement with current flo

25、wing 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 measurement; c) disconnection of the voltage source. NOT

26、E Unless otherwise specified, the made contact(s) 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 measurement, the value specified in the detail specification.

27、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 mr mf I I V V R + = where R is the resistance; V mfis the measured forward

28、voltage; V mris the measured reverse voltage; I fis the forward current; I ris the reverse current. NOTE 1 In the equation the sign of the voltage measurements must be included. NOTE 2 Any deviation from the standard test procedure should be clearly indicated in the test report. Page4 EN6051222:2003

29、 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 measuring current; d) the permissible limits of contact resistance; e) any deviation from the standar

30、d test method. _ Page5 EN6051222:2003BS EN 60512-2-2:2003 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 Europe and at the international level. It is

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