EN 55024-1998 信息技术设备.抗干扰特性的测量方法和极限值 Information technology equipment - Immunity characteristics - Limits and methods of measurement

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1、EUROPEAN STANDARD 1 NORME EUROPEENNE EUROPAISCHE NORM EN 55024 September I 998 ICS 33 100 Descriptors Data processing equipment telecomrnurication terminals facsimile equipment photocopying machines printers cash registers vending machines local area networks electromagnetic immurity radio disturban

2、ces electrostatic discharge tests characteristics measurements limits English version Information technology equipment Immunity characteristics Limits and methods of measurement a CISPR 24 1 997 modified Appareils de traitement de I information Einrichtungen der lnforrnationstechnik Caracteristiques

3、 d1immunit6 Storf estigkeitseigenschaften Limites et methodes de mesure Grenzwerte und Prufverf ahren CISPR 24 1997 modifiee CISPR 24 1997 modifiziert This European Standard was approved by CENELEC on 1998 08 01 CENELEC members are bound to comply with the CENJCENELEC Internal Regulations which stip

4、ulate 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 Standard

5、 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 national electr

6、otechnical committees of Austria Belgium Czech Republic Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland and United Kingdom CENELEC European Committee for Electrotechnical Standardization Comitt Europeen de Normalisation Elec

7、trotechnique Europaisches Komitee fiir Elektrotechnische Normung Central Secretariat rue de Stassart 35 B 1050 Brussels 1998 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members Ref No EN 55024 1998 E Page 2 EN 55024 1998 Foreword The text of the Int

8、ernational Standard ClSPR 24 1997 prepared by ClSPR SC G Interference relating to information technology equipment together with common modifications prepared by SC 210A EMC Products of Technical Committee CENELEC TC 210 EMC was submitted to the Unique Acceptance Procedure and was approved by CENELE

9、C as EN 55024 on 1998 08 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 latest date by which the national standards conflicting with the EN have to be withdrawn Annexes designate

10、d normativen are part of the body of the standard In this standard annexes A B C D E F G and ZA are normative Annex ZA has been added by CENELEC Page 3 EN 55024 1998 CONTENTS 1 Page INTRODUCTION 4 Clause 1 Scope and object 5 2 Normative references 5 3 Definitions 6 4 Immunity test requirements 8 5 A

11、pplicability 11 6 Conditions during testing 11 7 Performance criteria 12 8 Product documentation 13 Tables 1 Immunity enclosure port 13 2 Immunity signal ports and telecommunication ports 14 3 Immunity input d c power port excluding equipment marketed with an a c 1d c power converter 14 4 Immunity i

12、nput a c power port including equipment marketed with a separate a cJd c power converter 15 Annexes A Telecommunications terminal equipment 16 B Data processing equipment 23 C Local area networks LAN 27 D Printers 28 E Copying machines 29 F Automatic teller machines ATM 30 G Point of sale terminals

13、POST 32 ZA Normative references to international publications with their corresponding European publications 34 I I Page 4 EN 55024 1998 INTRODUCTION This ClSPR publication establishes uniform requirements for the electromagnetic immunity of information technology equipment The test methods are give

14、n in the referenced Basic EMC Immunity Standards This publication specifies applicable tests test levels product operating conditions and assessment criteria Page 5 EN 55024 1998 INFORMATION TECHNOLOGY EQUIPMENT IMMlJNlTY CHARACTERISTICS LIMITS AND METHODS OF MEASUREMENT I 1 Scope and object This Cl

15、SPR publication applies to information technology equipment ITE as defined in ClSPR 22 I Harmonized standards prepared by ETSI which cover the immunity requirements for telecommunications network equiipment take precedence over this standard Procedures are defined for the measurement of ITE and limi

16、ts are specified which are developed for ITE and within the frequency range from 0 Hz to 400 GHz I For exceptional environmental cconditions special mitigation measures may be required 11 A Owing to testing and performance assessment considerations some tests are specified in defined frequency bands

17、 or at selected frequencies Equipment which fulfils the requirements at these frequencies is deemed to fulfil the requirements in the entire frequency range from 0 Hz to 400 GHz for electroma netic phenomena 0 The object of this publication is to establish requirements which will provide an adequate

18、 level of intrinsic immunity so that the equipment will operate as intended in its environment B I The object of this publication is to define the immunity test requirements for equipment defined in the scope in relation to continuous and transient conducted and radiated disturbances i including ele

19、ctrostatic dischargies ESD I The test requirements are specified for each port considered NOTES 1 Safety considerations are not covered in this publication 2 In special cases situations wlill arise where the level of disturbance may exceed the levels specified in this publication for example where a

20、 hand held transmitter is used in proximity lo an equipment In these instances special mitigation measures may have to be employed 2 Normative references The following normative doci ments contain provisions which through reference in this text constitute provisions of this International Standard Fo

21、r dated references subsequent amendments to or revisions of any of these publications do not apply However parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below For unda

22、ted references the latest edition of the publication referred to applies Members of IS0 and IEC maintain registers of currently valid International Standards IEC 60050 161 1990 Int srnational Electrotechnical Vocabulary IEV Chapter 161 Electromagnetic compatibility IEC 60318 1970 An IEC artificial e

23、ar of the wideband type for the calibration of earphones used in audiometry Page 6 EN 55024 1998 IEC 61000 4 2 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 2 Electrostatic discharge immunity test Basic EMC Publication IEC 61000 4 3 1995 Electromagnetic com

24、patibility EMC Part 4 Testing and measurement techniques Section 3 Radiated radio frequency electromagnetic field immunity test Basic EMC Publication IEC 61000 4 4 1995 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 4 Electrical fast transienC5urst immunity test

25、Basic EMC Publication IEC 61000 4 5 1995 Electrornegnetic compatibility EMC Part 4 Testing and measurement techniques Section 5 Surge immunity tests Basic EMC Standard IEC 61000 4 6 1996 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 6 Immunity to conducted distu

26、rbances induced by radio frequency fields IEC 61 000 4 8 1993 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section 8 Power frequency magnetic fieM immunity test IEC 61 000 4 1 1 1994 Electromagnetic compatibility EMC Part 4 Testing and measurement techniques Section I

27、I Voltage dips short interruptions and voltage variations immunity tests ClSPR 22 1997 Information technology equipment Radio disturbance characteristics Limits and methods of measurement IS0 9241 3 1992 Ergonomic requirements for office work with visual display terminals VDTs Part 3 Visual display

28、requirements ITU T Recommendation 1 24 l I Telephony ITU T Recommendation 1 41 I Integrated service digital network ISDN user network interfaces 3 Definitions For the purpose of this publication the definitions contained in the following documents apply ITU T Recom nendation 1 4 11 IEC 60050 161 Int

29、ernational Electrotechnical Vocabulary IEV Chapter 161 In addition the following specific definitions apply 3 1 continuous wave CW Electromagnetic waves the successive oscillations of which are sinusoidal and identical under steady state conditions which can be interrupted or modulated to convey inf

30、ormation Page 7 EN 55024 1998 3 2 degradation The unwan ted change in operational performance of an EUT due to electromagnetic disturbances This does not necessarily mean malfunction or catastrophic failure 3 3 equipment under test EUT A representative ITE or functionally interactive group of ITE th

31、at is a system which includes one or more host units and is used for evaluation purposes 3 4 information technology equipment ITE The definition of ITE is as described in ClSPR 22 3 5 jitter of a cathode ray tube CRT monitor Peak to peak variation in the geometric location of picture elements on the

32、 viewing surface of the CRT monitor 3 6 temporal instability flicker The perception of unintended temporal variation in luminance 3 7 port Particular interface of the specified equipment with the external electromagnetic environment see figure 1 Enclosure port DC power port Earth port Information te

33、chnology AC power port equipment Signal port Telecommunication port Figure 1 Description of ports 3 8 enclosure port The physical boundary of the equipment through which electromagnetic fields may radiate or impinge For plug in units the physical boundary will be defined by the host unit 3 9 cable p

34、ort A point at which a conductor or a cable is connected to the equipment Examples are signal and power ports 3 10 a telephony call The process exercised in the network and the telecommunication terminal equipment TTE to allow interchange of information speech video or data with another TTE through

35、the network NOTE The call shall be operated in the way specified by the manufacturer For circuit switched services the exchange of data shall be considered to be possible when a 64 kbiffs channel or equivalent is available for both parties For packet service the exchange of information shall be cons

36、idered to be possible when a virtual path is established to the called TTE 3 11 to establish a telephony call The operating procedure for a user or an automatic process in conjunction with the network to reach the capability to exchange information with another TTE See note to 3 10 3 12 to receive a

37、 telepha ny call The operating procedure for a user or an automatic process initiated by and in conjunction with the network to reach the capability to exchange information with another TTE See note to 3 10 3 13 to maintain a telephony call The capability of exchanging information without having to

38、clear and re establish a cad See note to 3 10 3 14 to clear a telephony call The operating procedure for a user or an automatic process in conjunction with the network either at the initiative of the local party or the distant party to stop the capability of exchanging information by an orderly retu

39、rn to a state where the establishment of a new call is possible See note to 3 10 3 15 network terminlator NT Ancillary equipment representing the termination of the telecommunication network 3 16 telephony service A service providing users with the ability for real time two way speech conversation v

40、iia a network see ITU T Recommendation 1 241 I 3 17 telecommunications terminal equipment Equipment intended to be connected to a public or private telecommunications network that is a to be connected directly to the termination of a telecommunications network in order to send process or receive inf

41、ormation or b to interwork with a telecommunications network being connected directly or indirectly to the termination of ia telecommunications network in order to send process or receive information 4 Immunity test requirements 4 1 General The immunity test requirements for equipment are given on a

42、 port by port basis Tests shall be conducted in a well defined and reproducible manner The tests shall be carried out as single tests in sequence The sequence of testing is optional The description of the test the test generator the test methods and the test set up are given in IEC basic EMC standar

43、ds which are referred to in the following tables The contents of these IIZC basic EMC standards are not repeated here however modifications or additional information needed for the practical application of the tests are given in this publication 4 2 Particular requiremtents 4 2 1 Electrostatic disch

44、arges ESD Static electricity discharges shall be applied only to those points and surfaces of the EUT which are expected to be touched during usual operation including user access as specified in the user manual for example for ribbon and paper roll changes The discharges shall be applied in two way

45、s a contact discharge to the conductive surfaces and to coupling planes The EUT shall be exposed to at least 200 discharges 100 each at negative and positive polarity at a minimum of four test points a minimum of 50 discharges at each point One of the test points sha 11 be subjected to at least 50 i

46、ndirect discharges contact to the centre of the front edge of the horizontal coupling plane The remaining three test points shall each Page 9 EN 55024 1998 receive at least 50 direct contact discharges If no direct contact test points are available then at least 200 indirect discharges shall be appl

47、ied in the indirect mode see IEC 61000 4 2 for use of the Vertical Conductinlg Plane VCP Tests shall be performed at a maximum repetition rate of one discharge per second b air discharge at slots and apertures and insulating surfaces On those parts of the EUT where it is not possible to perform cont

48、act discharge testing the equipment should be investigated to identify user accessible points where breakdown may occur examples are openings at edges of keys or in the covers of keyboards and telephone handsets Such points are tested using the air discharge method See also IEC 61000 4 2 regarding p

49、ainted surfaces This investigation should be restricted to those areas normally handled by the user A minimum of 10 single air discharges shall be applied to the selected test point for each such area The application of electrostatic discharges to the contacts of open connectors is not required by t

50、his publication 4 2 2 Electrical fast transients EFT The test method is given in IEC ti1000 4 4 However the test set up for in situ measurements is not applicable for ITE The test procedure is as given in IEC 61000 4 4 together with the following changes and clarifications if the equipment contains