BS-EN-60068-2-21-2006.pdf
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1、BRITISH STANDARD BS EN 60068-2-21: 2006 Environmental testing Part 2-21: Tests Test U: Robustness of terminations and integral mounting devices The European Standard EN 60068-2-21:2006 has the status of a British Standard ICS 19.040; 31.190 ? Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08
2、:06:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60068-2-21:2006 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2006 BSI 2006 ISBN 0 580 49211 7 National foreword This British Standard was published by BSI. It is the UK imp
3、lementation of EN 60068-2-21:2006. It is identical with IEC 60068-2-21:2006. It supersedes BS EN 60068-2-21:1999 which will be withdrawn on 1 July 2009. The UK participation in its preparation was entrusted to Technical Committee EPL/501, Electronic assembly technology. A list of organizations repre
4、sented on EPL/501 can be obtained on request to its secretary. 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 cannot confer immunity from legal obligations. Amendments issu
5、ed since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:06:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60068-2-21 NORME EUROPENNE EUROPISCHE NORM July 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europe
6、n de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60068-2-21:2006 E ICS 19.040; 31.
7、190 Supersedes EN 60068-2-21:1999 English version Environmental testing Part 2-21: Tests - Test U: Robustness of terminations and integral mounting devices (IEC 60068-2-21:2006) Essais denvironnement Partie 2-21: Essais - Essai U: Robustesse des sorties et des dispositifs de montage incorpors (CEI 6
8、0068-2-21:2006) Umweltprfungen Teil 2-21: Prfungen - Prfung U: Widerstandsfhigkeit der Anschlsse und integrierter Befestigungsmittel (IEC 60068-2-21:2006) This European Standard was approved by CENELEC on 2006-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which
9、 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 Central Secretariat or to any CENELEC member. This European S
10、tandard 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 status as the official versions. CENELEC members are the na
11、tional electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switz
12、erland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:06:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 Foreword The text of document 91/582/FDIS, future edition 6 of IEC 60068-2-21, prepared by IEC TC 91, Electronics assembly technology, was submitted to the IEC-
13、CENELEC parallel vote and was approved by CENELEC as EN 60068-2-21 on 2006-07-01. This European Standard supersedes EN 60068-2-21:1999. It includes the following significant technical changes with respect to EN 60068-2-21:1999 addition of torque severity for nominal thread diameter of 8 mm in Test U
14、d: torque in accordance with IEC 60252-2 (see Table 5); modification of substrate specification and mounting method describing lead-free solder in Test Ue (see Figure 5 and 8.3.3 et al.); modification of test jig and test condition in Test Ue1: substrate bending test (see Figure 7 et al.); change of
15、 pushing force from 10 N to 5 N in Test Ue3: shear test (see 8.5.3.2). 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) 2007-04-01 latest date by which the national standards c
16、onflicting with the EN have to be withdrawn (dow) 2009-07-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60068-2-21:2006 was approved by CENELEC as a European Standard without any modification. _ EN 60068-2-21:2006 Licensed Copy: sheffieldun sh
17、effieldun, na, Thu Nov 09 08:06:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 CONTENTS 1 Scope.5 2 Normative references .5 3 Test Ua1: tensile 6 3.1 Object .6 3.2 General description .6 3.3 Preconditioning .6 3.4 Initial measurements .6 3.5 Test method 6 3.6 Final measurements7 3.7 Information to
18、be given in the relevant specification 7 4 Test Ua2: thrust8 4.1 Object .8 4.2 General description .8 4.3 Preconditioning .8 4.4 Initial measurements .8 4.5 Test method 8 4.6 Final measurements9 4.7 Information to be given in the relevant specification 9 5 Test Ub: bending9 5.1 Object .9 5.2 General
19、 description .10 5.3 Preconditioning .10 5.4 Initial measurements .10 5.5 Test method 10 5.6 Final measurements12 5.7 Information to be given in the relevant specification 13 6 Test Uc: torsion13 6.1 Object .13 6.2 Preconditioning .13 6.3 Initial measurements .13 6.4 Test method 13 6.5 Final measure
20、ments14 6.6 Information to be given in the relevant specification 14 7 Test Ud: torque 14 7.1 Object .14 7.2 General description .14 7.3 Preconditioning .14 7.4 Initial measurements .14 7.5 Test method 15 7.6 Final measurements15 7.7 Information to be given in the relevant specification 15 EN 60068-
21、2-21:2006 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:06:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 8 Test Ue: robustness of terminations for SMD in the mounted state .16 8.1 Object .16 8.2 General description .16 8.3 Mounting .17 8.4 Initial measurements .18 8.5 Test methods 18 8
22、.6 Final measurements20 8.7 Information to be given in the relevant specification 21 Figure 1 Clamp for the testing of short terminations .12 Figure 2 Sketches showing direction by arrow heads of application of forces Test Ua1: tensile and test Ua2: thrust22 Figure 3 Sketches showing test procedure
23、for test Ub: bending (see 5.5.2.1 and 5.5.2.3) .23 Figure 4 Diagrams showing test procedure for test Uc: torsion test for wire terminations24 Figure 5 Example of substrate for test method Ue1 (also suitable for electrical test).25 Figure 6 Example of substrate for test methods Ue2 and Ue3 (also suit
24、able for electrical test) 25 Figure 7 Bending jig for test Ue126 Figure 8 Example of a push-off test substrate 26 Figure 9 Force test Ue2 pull-off .27 Figure 10 Example of a force application pushing tool for test Ue2 push-off 27 Figure 11 Example of the shear (adhesion) test Ue3.27 Table 1 Applicat
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- BS EN 60068 21 2006
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