IEC_60801-3-1984_scan.pdf

NORMECEIINTERNATIONALEIECINTERNATIONAL801-3STANDARDPremiere editionFirst edition1984TROISIEME IMPRESSION 1992THIRD IMPRESSION 1992Compatibilite electromagnetique pourles materiels de mesure et de commandedans les processus industrielsPartie 3:Prescriptions relatives aux champsde rayonnements electromagnetiquesElectromagnetic compatibility forindustrial-process measurementand control equipmentPart 3:Radiated electromagnetic field requirementsNumero de referenceReference numberCEI/IEC 801-3:1984NORMECEIINTERNATIONALEIECINTERNATIONAL801-3STANDARDPremiere editionFirst edition1984TROISIEME IMPRESSION 1992THIRD IMPRESSION 1992Compatibilite electromagnetique pourles materiels de mesure et de commandedans les processus industrielsPartie 3:Prescriptions relatives aux champsde rayonnements lectromagntiquesElectromagnetic compatibility forindustrial-process measurementand control equipmentPart 3:Radiated electromagnetic field requirementsCEl 1984 Droits de reproduction rservs-Copyright-all rights reservedAucune partie de cette publication ne peut&tre reproduite ni No part of this publication may be reproduced or utilized inutisee sous quelque forme que ce sod at par aucun pro-any form or by any means,electronic or mechanical,cd6,lectronique ou mecanique,y compris la photocopie etincluding photooopying and microfilm,without permissionles microfilms,sans laccord ecrit de lediteur.in writing from the publisherBureau Central de la Commission Electrotechnique Intemationale 3,rue de Varemb Genve,SuisseCODE PRIXCommission Electrotechnique InternationalePRICE CODESInternational Electrotechnical CommissionMeayHapoHaR neKTpOTeXHcKaR HoMCCHRPour prix,voir catalogue en vigueurFor price,see current cataogu801-3IEC1984-3-CONTENTSPageFOREWORD.5PREFACE.5Clause1.Scope 72.Object.73.General.74.Definitions/Terminology.95.Severity levels.136.Selection of test methods.157.Test equipment.178.Test set-up.178.1 Shielded room.19C8.2 Stripline circuit.199.Test procedures.199.1 Shielded room.219.2 Stripline circuit.219.3 Evaluation of the test results.21FIGURES.24APPENDIX A-Field intensity and radiated power from antennae in free space.31801-3IEC 1984-5-INTERNATIONAL ELECTROTECHNICAL COMMISSIONELECTROMAGNETIC COMPATIBILITYFOR INDUSTRIAL-PROCESS MEASUREMENTAND CONTROL EQUIPMENTPart 3:Radiated electromagneticfield requirementsFOREWORD1)The formal decisions or agreements of the I E C on technical matters,prepared by Technical Committees on which all theNational Committees having a special interest therein are represented,express,as nearly as possible,an international consensusof opinion on the subjects dealt with.2)They have the form of recommendations for international use and they are accepted by the National Committees in thatsense.3)In order to promote international unification,the IE Cexpresses the wish that all National Committees should adopt the text ofthe I E C recommendation for their national rules in so far as national conditions will permit.Any divergence between the 1 E Crecommendation and the corresponding national rules should,as far as possible,be clearly indicated in the latter.PREFACEThis standard has been prepared by IEC Technical Committee No.65:Industrial-processMeasurement and Control.It forms Part 3 of I E C Publication 801.The text of this standard is based on the following documents:Six MonthsRuleReport on VotingC65(CO)2865(CO)31Further information can be found in the Report on Voting indicated in the table above.801-3IEC1984ELECTROMAGNETIC COMPATIBILITYFOR INDUSTRIAL-PROCESS MEASUREMENTAND CONTROL EQUIPMENTPart 3:Radiated electromagneticfield requirements1.ScopeThis part is applicable to the susceptibility of industrial-process measurement and controlinstrumentation to radiated electromagnetic energy.It additionally establishes severity levels andthe required test procedures.2.ObjectThe object of this part is to establish a common reference for evaluating the performance ofindustrial-process measurement and control instrumentation when subjected to electromagneticfields such as those generated by portable radio transceivers(walkie-talkies)or any other devicethat will generate continuous wave radiated electromagnetic energy.Note.-Test methods are defined in this part for measuring the effect that electromagnetic radiation has on the equipmentconcerned.The simulation and measurement of electromagnetic radiation is not adequately exact for quanti-tative determination of effects.The test methods defined are structured for the primary objective of establishingadequate repeatability of results at various test facilities for qualitative analysis of effects.These differences shall be taken into account when verification testing is conducted.3.GeneralMost electronic equipment is in some manner affected by electromagnetic radiation.Thisradiation is frequently generated by the small hand-held radio transceivers that are used byoperating,maintenance and security personnel.The susceptibility of industrial-process measure-ment and control instrumentation to the radiation of the hand-held transceiver is the primaryconcern of this part.However,other sources of electromagnetic radiation are involved,such as fixed station radioand television transmitters,vehicle radio transmitters and various industrial electromagneticsources.In addition to the continuous form of electromagnetic energy deliberately generated,there isalso spurious radiation caused by devices such as welders,thyristors,fluorescent lights,switchesoperating inductive loads,etc.For the most part,this interference manifests itself as conductedelectrical interference and,as such,is dealt with in other parts ofthe standard.Methods employedto prevent effects from continuous radiation will normally also reduce the effects from thesesources.The electromagnetic environment is determined by the strength of the electromagnetic field(field strength in volts per metre).The field strength is not easily measured without sophisticatedinstrumentation nor is it easily calculated by classical equations and formulae because of the effectof surrounding structures or the proximity of other equipment that will distort and/or reflect theelectromagnetic waves.