IEC 61965-2003 Mechanical safety of cathode ray tubes《阴极射线管的机械安全》.pdf

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1、INTERNATIONAL STANDARD IEC 61965 Second edition 2003-07 Mechanical safety of cathode ray tubes Scurit mcanique des tubes cathodiques Reference number IEC 61965:2003(E)Publication numbering As from 1 January 1997 all IEC publications are issued with a designation in the 60000 series. For example, IEC

2、 34-1 is now referred to as IEC 60034-1. Consolidated editions The IEC is now publishing consolidated versions of its publications. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the base publication, the base publication incorporating amendment 1 and the base publication inco

3、rporating amendments 1 and 2. Further information on IEC publications The technical content of IEC publications is kept under constant review by the IEC, thus ensuring that the content reflects current technology. Information relating to this publication, including its validity, is available in the

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7、Customer Service Centre If you have any questions regarding this publication or need further assistance, please contact the Customer Service Centre: Email: custserviec.ch Tel: +41 22 919 02 11 Fax: +41 22 919 03 00 INTERNATIONAL STANDARD IEC 61965 Second edition 2003-07 Mechanical safety of cathode

8、ray tubes Scurit mcanique des tubes cathodiques IEC 2003 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Internatio

9、nal Electrotechnical Commission, 3, rue de Varemb, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmailiec.ch Web: www.iec.ch For price, see current catalogue PRICE CODE Commission Electrotechnique Internationale International Electrotechnic

10、al Commission XA 2 61965 IEC:2003(E) CONTENTS FOREWORD 5 INTRODUCTION 6 1 Scope 7 2 Normative references. 7 3 Definitions . 8 4 General requirements 9 4.1 Corrosion protection . 9 4.2 Mechanical damage 9 4.3 Handling. 9 4.4 Film-coated CRTs. 9 5 Environmental conditioning.10 5.1 Standard atmospheric

11、 conditions for testing.10 5.2 Preconditioning10 5.3 Thermal conditioning .10 6 Sampling 10 6.1 Sampling plans10 6.2 Sample numbers10 6.3 Compliance .10 7 Test preparation and set-up10 7.1 Scratch patterns 10 7.2 Barriers .11 7.3 Mounting .11 7.4 Mounting position 11 8 Testing of large CRTs.11 8.1 M

12、echanical strength (ball impact test)11 8.2 Implosion test (missile)12 8.3 Implosion test (thermal shock) .13 8.4 High-energy impact test.13 9 Testing of small CRTs.14 9.1 Mechanical strength (ball impact test)14 9.2 Implosion test (high ball)15 9.3 Implosion test (thermal shock) .15 9.4 High-energy

13、 impact test.15 10 Testing of prestressed banded CRTs with protective film 16 10.1 General .16 10.2 Film scoring pattern for CRTs with protective film 16 10.3 Peel test 17 10.4 Immersion test.17 11 Marking 17 12 Application notes for pre-stressed banded CRTs with protective film.18 13 Normative requ

14、irements for the use of Tables 1 and 2 (prestressed banded CRTs) 18 13.1 Sampling plan I: New construction.18 13.2 Sampling plan II: New construction with known resin or tape .19 13.3 Sampling plan III: Tension band and alternative tension band19 13.4 Sampling plan IV: Alternative construction.20619

15、65 IEC:2003(E) 3 14 Normative requirements for the use of Tables 3 and 4 (prestressed banded with protective film)21 14.1 Sampling plan I: New construction.21 14.2 Sampling plan II: New construction with known resin, tape, film or adhesive22 14.3 Sampling plan III: Alternative tension band 22 14.4 S

16、ampling plan IV: Alternative construction.23 15 Alternative thermal conditioning for use with Tables 3 and 4 (prestressed banded with protective film).24 15.1 Additional peel force requirements where alternative thermal conditioning is to be performed .24 15.2 Tensile strength test where alternative

17、 thermal conditioning is to be performed24 16 Normative requirements for the use of Tables 6 and 7 (bonded frame CRTs)25 16.1 Sampling plan I: New construction.25 16.2 Sampling plan II: Alternative construction 26 17 Normative requirements for the use of Tables 8 and 9 (laminated CRTs) 26 17.1 Sampl

18、ing plan I: New construction.26 17.2 Sampling plan II: Alternative construction 26 Annex A (informative) Background to the development of this standard.46 A.1 Mechanical strength test 47 A.2 Implosion test 47 A.3 Small CRTs (76 mm to 160 mm diagonal) 47 A.4 Evaluation time 47 Annex B (informative) V

19、elocity and potential force of glass particles expelled from a CRT subjected to a ball impact Ballistic and statistical calculations 48 B.1 Introduction48 B.2 Analysis without friction48 B.3 Analysis with friction 54 B.4 Potential threat 57 B.5 Conclusions .57 Figure 1 Example of a test cabinet .35

20、Figure 2 Example of a ball impact test36 Figure 3 Example of a 2,3 kg steel missile .37 Figure 4 Missile impact area on a typical CRT38 Figure 5 Example of a missile impact test.39 Figure 6 Options for scratch patterns for implosions by the thermal shock method .40 Figure 7 Film scoring tool.41 Figu

21、re 8 Example of high-energy impact test set-up .42 Figure 9 Steel pins used in high-energy impact test43 Figure 10 Weights used in high-energy impact test44 Figure 11 Example of 1,4 kg steel missile.45 Figure B.1 Height of the barriers and distances from the CRT face.48 4 61965 IEC:2003(E) Figure B.

22、2 Example of the parabolic trajectory of a glass particle and the definition of the distances.49 Figure B.3 Definition of the initial angle and initial velocity and the forces acting on a particle50 Figure B.4 Initial velocity required to pass over barriers at x = l 1 (solid line) or x = l 2 (dashed

23、 line) as a function of the initial angle .52 Figure B.5 Trajectories for a glass particle for different initial angles and an initial velocity of 4 m/s 52 Figure B.6 Definition of the forces acting on a particle54 Figure B.7 Measurements of a typical glass particle.55 Figure B.8 Trajectory of a gla

24、ss particle with an initial velocity of 2 m/s and an initial angle of 45 without friction (dashed line) and with friction (solid line) .56 Figure B.9 Trajectories of a glass particle with an initial velocity of 2 m/s and an initial angle of 45 for different values of the cross-sectional area .57 Tab

25、le 1 Sampling and test programme for prestressed banded CRTs exceeding 160 mm diagonal.27 Table 2 Sampling and test programme for prestressed banded CRTs from 76 mm to 160 mm diagonal.28 Table 3 Sampling and test programme for prestressed banded CRTs with protective film exceeding 160 mm diagonal .2

26、9 Table 4 Sampling and test programme for prestressed banded CRTs with protective film from 76 mm to 160 mm diagonal.30 Table 5 Sampling and test programme for adhesion of film used in CRTs with protective film (tested according to Tables 3 and 4) 31 Table 6 Sampling and test programme for bonded fr

27、ame CRTs exceeding 160 mm diagonal32 Table 7 Sampling and test programme for bonded frame CRTs from 76 mm to 160 mm diagonal.32 Table 8 Sampling and test programme for laminated CRTs exceeding 160 mm diagonal33 Table 9 Sampling and test programme for laminated CRTs from 76 mm to 160 mm diagonal33 Ta

28、ble 10 CRT size and deflection angle ranges34 Table B.1 Values of the distances 49 Table B.2 Upper and lower boundary values of the initial angle5161965 IEC:2003(E) 5 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ MECHANICAL SAFETY OF CATHODE RAY TUBES FOREWORD 1) The International Electrotechnical Com

29、mission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

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33、blications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used o

34、r for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corre

35、sponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the l

36、atest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, w

37、hether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

38、 indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC

39、61965 has been prepared by IEC technical committee 39: Electronic tubes. This second edition cancels and replaces the first edition published in 2000. This second edition constitutes a technical revision. The main change with respect to the previous edition is the inclusion of the requirements for c

40、athode ray tubes with film attached to the face plate. The text of this standard is based on the following documents: FDIS Report on voting 39/264/FDIS 39/265/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This

41、publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The committee has decided that the contents of this publication will remain unchanged until 2005. At this date, the publication will be reconfirmed; withdrawn; replaced by a revised edition, or amended. 6 61965 IEC:2003(

42、E) INTRODUCTION This International Standard sets forth test methods and limits for cathode ray tubes (CRTs). Originally, the only IEC standard for the mechanical safety of CRTs had been contained within Clause 18 of the equipment standard IEC 60065. Whereas that standard had been accepted and used b

43、y many countries, many others were not able to implement its requirements because of differing local needs. IEC 61965 was therefore published in 2000 with the aim of providing the basis for wider acceptance and use and reflecting the current IEC policy of producing separate component standards to wh

44、ich equipment standards can refer. This 2nd edition covers the requirements for the CRTs with film attached to the faceplate as part of the safety implosion protection system. Many years of experience had been built up in the use of both the IEC 60065 test and the other commonly used national altern

45、atives. During the development of IEC 61965, extensive test programmes and ballistic and statistical calculations were carried out to verify that the requirements of the standard give protection for users of CRTs when the tubes are mounted in the equipment for which they are intended. This was also

46、done to ensure that IEC 61965 maintains the stringent requirements of both IEC 60065 and the alternative tests in common use. These tests and calculations also confirmed a) the acceptability of one standard ball for the mechanical strength test, and b) the need for the implosion test where it is not

47、 always possible to induce rapid devacuation using the ball impact test. As the impact tests in this standard are overstress tests, only the effect of rapid devacuation is evaluated and not subsequent relaxation of mechanical stresses in the CRT from the implosion protection system.61965 IEC:2003(E)

48、 7 MECHANICAL SAFETY OF CATHODE RAY TUBES 1 Scope This International Standard is applicable to cathode ray tubes and cathode ray tube assemblies (hereinafter referred to as CRTs) which are intended for use as components in apparatus and which have integral protection with respect to the effects of i

49、mplosion. These requirements apply to CRTs intended for use in apparatus including electrical and electronic measuring and testing equipment, information technology equipment, medical equipment, telephone equipment, television equipment and other similar electronic apparatus. This standard is intended to apply only to those CRTs in which the face of the CRT forms part of the enclosure for the apparatus.