【英文标准名称】:StandardGuideforMeasuringSomeElectronicCharacteristicsofUltrasonicExaminationInstruments
【原文标准名称】:超声检验装置的某些电子特性测定的标准指南
【标准号】:ASTME1324-2000(2005)
【标准状态】:现行
【国别】:
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E07.06
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:
【英文主题词】:electroniccharacteristics;evaluation;instruments;linearity;pulsers;receivers;ultrasonic
【摘要】:Therecommendedmeasurementproceduresdescribedinthisguideareintendedtoprovideperformance-relatedmeasurementsthatcanbereproducedunderthespecifiedtestconditionsusingcommerciallyavailabletestinstrumentation.Thesemeasurementsindicatecapabilitiesofsectionsoftheultrasonicexaminationinstrumentindependentofspecifictransducersorexaminationconditions.Measurementsaremadefromnormallyavailableconnectorsortestpointssothatnoaccesstointernalcircuitryisrequired.Further,thisguideisnotintendedforservice,calibration,ormaintenanceofcircuitryforwhichthemanufacturerrsquo;instructionsareavailable.Itisintendedprimarilyforpulseechoflawdetectioninstrumentsoperatinginthenominalfrequencyrangeof100kHzto25MHz,buttheproceduresareapplicabletomeasurementsoninstrumentsutilizingsignificantlyhigherfrequencycomponents.Theseprocedurescanbeappliedtotheevaluationofanypulse-echoultrasonicexaminationinstrumentwhichcanbedescribedasacombinationoftheelectronicsectionsdiscussedinthisguide.Note28212;Theseproceduresarenotintendedtoprecludetheuseorapplicationofequipmentforwhichsomeorallofthemeasurementtechniquesofthisdocumentarenotapplicable.Anultrasonicexaminationinstrumentthatcannotbecompletelydescribedasacombinationoftheelectronicsectionsdiscussedinthispracticecanbepartiallyevaluated.Eachportionoftheultrasonicexaminationinstrumentthatisevaluatedmustfitthedescriptionforthecorrespondingsection.Thisguideismeanttobeusedbyelectronicpersonneltoevaluatetheelectronicsystemcomponentsandnottheultrasonicsystemcharacteristics.1.1Thisguidedescribesproceduresforelectronicallymeasuringthefollowingperformance-relatedcharacteristicsofsomesectionsofultrasonicinstruments:1.1.1PowerSupplySectionlineregulation,batterydischargetime,andbatterychargetime.1.1.2PulserSectionpulseshape,pulseamplitude,pulserisetime,pulselength,andpulsefrequencyspectrum.1.1.3ReceiverSectionverticallinearity,frequencyresponse,noiseandsensitivity,anddBcontrols.1.1.4TimeBaseSectionhorizontallinearity,andclock(pulserepetitionrate).1.1.5Gate/AlarmSectiondelayandwidth,resolution,alarmlevel,gainuniformity,analogoutput,andbackechogate.1.2ThisguidecomplementsPracticeE317,andisnotintendedforevaluatingtheperformancecharacteristicsofultrasonicexaminationinstrumentsontheinspection/productionline.Note1Noaccesstointernalcircuityisrequired.
【中国标准分类号】:N77
【国际标准分类号】:19_100
【页数】:10P.;A4
【正文语种】:


【英文标准名称】:BusinessTeleCommunications(BTC);64kbit/sdigitalunrestrictedleasedlinewithoctetintegrity(D64U);networkinterfacepresentation;EnglishversionETS300288:1994
【原文标准名称】:商务电讯.带八位集成的64千位/秒的数字无限制租用线路.网络接口描述
【标准号】:DINETS300288-1994
【标准状态】:作废
【国别】:德国
【发布日期】:1994-06
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:试验;商务电讯;租用专线;电的;通信网;数字连接;电缆;电气安全;安全;数字的;电气工程;信号;电磁的;开式系统;规范(验收);电信;界面;接口
【英文主题词】:
【摘要】:
【中国标准分类号】:M19
【国际标准分类号】:33_040_50
【页数】:26P;A4
【正文语种】:德语