【英文标准名称】:Low-frequencycablesandwireswithPVCinsulationandPVCsheath;part7:distributionwireswithsolidconductors,PVCinsulated,polyamidecoated,insingles,pairs,triples,quadsandquintuples;amendmentNo.1topublication60189-7:1982
【原文标准名称】:聚氯乙烯绝缘和聚氯乙烯护套的低频电缆和电线第7部分:聚氯乙烯绝缘、聚酰胺涂覆的实心导体单芯、双芯、三芯、四芯和五芯配电用线修改1
【标准号】:IEC60189-7AMD1-1989
【标准状态】:作废
【国别】:国际
【发布日期】:1989-07-01
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC46C
【标准类型】:()
【标准水平】:()
【中文主题词】:绝缘线;绝缘;电线;配电线;聚氯乙烯绝缘材料;电缆;电缆;低频;绝缘电缆;低频电缆;聚氯乙烯;电气工程
【英文主题词】:electriccables;cables;lowfrequencies;electricwires;electricalengineering;distributionwires;low-frequencycables;polyvinylchloride;pvcinsulations;insulations;insulatedwires;insulatedcables
【摘要】:ThisstandardisLow-frequencycablesandwireswithPVCinsulationandPVCsheath;part7:distributionwireswithsolidconductors,PVCinsulated,polyamidecoated,insingles,pairs,triples,quadsandquintuples;amendmentNo.1topublication60189-7:1982.
【中国标准分类号】:K13;K12
【国际标准分类号】:29_060_10
【页数】:21P.;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforCharacterizingAcousticEmissionInstrumentation
【原文标准名称】:声辐射测量仪表表征的标准规程
【标准号】:ASTME750-2004
【标准状态】:现行
【国别】:
【发布日期】:2004
【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】:E07.04
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:声音传播;试验;无损检验;测量;仪器装置;声学;发射;噪声辐射
【英文主题词】:acousticemission;AE;dead-time;gain;preamplifier;sensitivity;sensor;signalprocessor;threshold
【摘要】:1.1Thispracticeisrecommendedforuseintestingandmeasuringoperatingcharacteristicsofacousticemissionelectroniccomponentsorunits.(SeeAppendixX1foradescriptionofcomponentsandunits.)Itisnotintendedthatthispracticebeusedforroutinechecksofacousticemissioninstrumentation,butratherforperiodicevaluationorintheeventofamalfunction.Thesensorisnotaddressedinthisdocumentotherthansuggestingmethodsforstandardizingsystemgains(equalizingthemchanneltochannel)whensensorsarepresent.1.2Wherethemanufacturerprovidestestingandmeasuringdetailsinanoperatingandmaintenancemanual,themanufacturer'smethodsshouldbeusedinconjunctionwiththemethodsdescribedinthispractice.1.3Difficultorquestionableinstrumentationmeasurementsshouldbereferredtoelectronicsengineeringpersonnel.1.4Themethodssetforthinthispracticearenotintendedtobeeitherexclusiveorexhaustive.1.5Themethods(techniques)usedfortestingandmeasuringthecomponentsorunitsofacousticemissioninstrumentation,andtheresultsofsuchtestingandmeasuringshouldbedocumented.Documentationshouldconsistofphotographs,chartsorgraphs,calculations,andtabulationswhereapplicable.1.6AEsystemsthatusecomputerstocontrolthecollection,storage,display,anddataanalysisareincommonuse.Featuresofthecomputer-basedsystemsmightincludewaveformcollectionaswellasawideselectionofmeasurementparametersrelatingtotheAEsignal.Themanufacturerprovidesaspecificationforeachsystemthatspecifiestheoperatingrangeandconditionsforthesystem.Allcalibrationandacceptancetestingofcomputer-basedAEsystemsmustusethemanufacturer'sspecificationasaguide.Thispracticedoesnotcovertestingofthecomputerorcomputerperipherals.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N65
【国际标准分类号】:17_140_20
【页数】:10P.;A4
【正文语种】: