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1、INTERNATIONALISOSTANDARD20339Firstedition2017-03Non-destructivetesting—Equipmentforeddycurrentexamination—ArrayprobecharacteristicsandverificationEssaisnondestructsif—AppareillagepourexamenparcourantsdeFoucault—CaractéristiquesdescapteursmultiélémentsetvérificationsReferencenumberISO20339:2017(E)?I
2、SO2017ISO20339:2017(E)COPYRIGHTPROTECTEDDOCUMENT?ISO2017,PublishedinSwitzerlandAllrightsreserved.Unlessotherwisespecified,nopartofthispublicationmaybereproducedorutilizedotherwiseinanyformorbyanymeans,electronicormechanical,includingphotocopying,orpostingontheinternetoranintranet,withoutpriorwritte
3、npermission.PermissioncanberequestedfromeitherISOattheaddressbeloworISO’smemberbodyinthecountryoftherequester.ISOcopyrightofficeCh.deBlandonnet8?CP401CH-1214Vernie,rGeneva,SwitzerlandTel.+41227490111Fax+41227490947copyright@iso.orgwww.iso.orgi?ISO2017–AllrightsreservedISO20339:2017(E)ContentsPageFo
4、reword.....v1Scope.....12Normativereferences....13Termsanddefinitions....14Probeandinterconnectingelementscharacteristics..24.1Generalcharacteristics.....24.1.1Application....24.1.2Probetypes....24.1.3Interconnectingelements...24.1.4Physicalcharacteristics...24.1.5Safety....34.1.6Environmentalcondi
5、tions...34.2Electricalcharacteristics....34.3Functionalcharacteristics....35Verification.....45.1Levelofverifications....45.2Characteristicstobeverified...46Measurementofelectricalandfunctionalcharacteristicsofanarrayprobe.56.1Electricalcharacteristics....56.1.1General....56.1.2Measurementcondition
6、s...56.1.3Impedanceofcoilelements...56.1.4Impedanceofapattern...56.1.5Channelassignment—Sequencing...66.1.6Cross-talk....66.2Functionalcharacteristics....66.2.1General....66.2.2Measurementconditions...67Surfacearrayprobes....87.1Referenceblocks....87.2Probemotion....97.3Referencesignal—Normalizatio
7、n...97.4Edgeefect(measurableinthecaseofsimplegeometry,e.g.metalsheets,disks).107.5Responsetoaslot....117.6Responsetoahole....127.7Lengthofcoverage....127.8Variationinsensitivitybetweenpatterns...127.9Minimu
