IEC 60793-1-41-2010 光纤.第1-41部分:测量方法和试验规程.频带宽度

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【英文标准名称】:Opticalfibres-Part1-41:Measurementmethodsandtestprocedures-Bandwidth
【原文标准名称】:光纤.第1-41部分:测量方法和试验规程.频带宽度
【标准号】:IEC60793-1-41-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-08
【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/SC86A
【标准类型】:()
【标准水平】:()
【中文主题词】:频带宽度;定义;尺寸规格;电气工程;光纤;频率;频率范围;测量;测量技术;动量;多模纤维;光学测量;光波导;特性;脉冲失真;抽样方法;试验;试验装置
【英文主题词】:Bandwidths;Definitions;Dimensions;Electricalengineering;Fibreoptics;Frequencies;Frequencyranges;Measurement;Measuringtechniques;Momentum;Multimodefibres;Opticalmeasurement;Opticalwaveguides;Properties;Pulsedistortion;Samplingmethods;Testing;Testingdevices
【摘要】:ThispartofIEC60793describesthreemethodsfordeterminingandmeasuringthemodalbandwidthofmultimodeopticalfibres(seeIEC60793-2-10,IEC60793-30seriesandIEC60793-40series).Thebasebandfrequencyresponseisdirectlymeasuredinthefrequencydomainbydeterminingthefibreresponsetoasinusoidalymodulatedlightsource.Thebasebandresponsecanalsobemeasuredbyobservingthebroadeningofanarrowpulseoflight.Thecalculatedresponseisdeterminedusingdifferentialmodedelay(DMD)data.Thethreemethodsare:?MethodA–Timedomain(pulsedistortion)measurement?MethodB–Frequency-domainmeasurement?MethodC–Overfilledlaunchmodalbandwidthcalculatedfromdifferentialmodedelay(OMBc)MethodsAandBcanbeperformedusingoneoftwolaunches:anoverfilledlaunch(OFL)conditionorarestrictedmodelaunch(RML)condition.MethodCisonlydefinedforA1a.2(andA1a.3inpreparation)multimodefibreandusesaweightedsummationofDMDlaunchresponseswiththeweightscorrespondingtoanoverfilledlaunchcondition.Therelevanttestmethodandlaunchconditionshouldbechosenaccordingtothetypeoffibre.
【中国标准分类号】:M33
【国际标准分类号】:33_180_10
【页数】:64P.;A4
【正文语种】:英语


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【英文标准名称】:StandardPracticeforSamplingAirborneParticulateContaminationinCleanroomsforHandlingAerospaceFluids
【原文标准名称】:处理航空航天流体用洁净室空气中粒状杂质取样的标准实施规程
【标准号】:ASTMF318-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:E21.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:航空航天运输;空气质量;航空运输;污染;电子工程;流体;杂质;抽样方法
【英文主题词】:aerospacecleanrooms;airbornecontamination;airsampling;contamination;particulatecontamination;sampling
【摘要】:1.1Thispracticecoversaprocedureforsamplingairborneparticulatematterlargerthan5minsize.Themethodisdesignedtobeusedinspecificareas,commonlycalledcleanroomsintheaerospaceindustry,whereaerospacefluidsarehandled.Note1PracticeF50isanalternativeprocedure.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:V04
【国际标准分类号】:13_040_30
【页数】:3P.;A4
【正文语种】:


【英文标准名称】:StandardGuideforAcuteToxicityTestwiththeRotiferBrachionus
【原文标准名称】:短尾轮虫科剧毒性测试的标准指南
【标准号】:ASTME1440-1991(2004)
【标准状态】:现行
【国别】:
【发布日期】:1991
【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】:E47.01
【标准类型】:(Guide)
【标准水平】:()
【中文主题词】:实验室医学;毒性;导则;试验
【英文主题词】:acutetoxicity;cysts;freshwater;invertebrate;LC50;marine;rotifers;toxicitytest
【摘要】:1.1Thisguidedescribesproceduresforobtaininglaboratorydataconcerningtheacutetoxicityofchemicalsandaqueouseffluentsreleasedintofresh,estuarine,ormarinewaters.AcutetoxicityismeasuredbyexposingBrachionusnewlyhatchedfromcyststoaseriesoftoxicantconcentrationsundercontrolledconditions.ThisguidedescribesatestforusingB.calyciflorus,afreshwaterrotifer,andtheAppendixdescribesmodificationsofthistestforestuarineandmarinewatersusingB.plicatilis.Theseproceduresleadtoanestimationofacutetoxicity,includingtheconcentrationexpectedtokill50%ofthetestrotifers(LC50)in24h.ProceduresnotspecificallystatedinthisguideshouldbeconductedinaccordancewithGuideE729andGuideE1192.1.2Modificationsoftheseproceduresmightbejustifiedbyspecialneedsorcircumstances.Althoughusingappropriateproceduresismoreimportantthanfollowingprescribedprocedures,theresultsoftestsconductedusingmodifiedproceduresmightnotbecomparabletorotiferacuteteststhatfollowtheprotocoldescribedhere.Comparisonoftheresultsusingmodifiedproceduresmightprovideusefulinformationconcerningnewconceptsandproceduresforconductingacutetoxicitytestsonchemicalsandaqueouseffluents.1.3Thisguideisorganizedasfollows:1.4Theseproceduresareapplicabletomostchemicals,eitherindividuallyorinformulations,commercialproducts,ormixtures.ThisguidecanalsobeusedtoconductinvestigationsoftheeffectsonrotifersurvivalofpH,hardness,andsalinityandonmaterialssuchasaqueouseffluents,leachates,oils,particulatematter,sediments,andsurfacewaters.Thisguidemightnotbeappropriateformaterialswithhighoxygendemand,withhighvolatility,subjecttorapidbiologicalorchemicaltransformation,orthatreadilysorbtotestchambers.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardsstatements,seeSection.
【中国标准分类号】:C10
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】: