【英文标准名称】:StandardTestMethodforEstimatingStrayRadiantPowerRatioofDispersiveSpectrophotometersbytheOpaqueFilterMethod
【原文标准名称】:用不透明滤光器评估色散分光光度计杂散辐射功率的标准试验方法
【标准号】:ASTME387-2004(2009)
【标准状态】:现行
【国别】:美国
【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】:E13.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:molecularspectroscopy;spectrophotometry;SRP;SRPR;straylight;strayradiantpower;strayradiantpowerratio;Energyanalysis;Energydeposition;Radiantenergy;Spectrophotometry--absorption
【摘要】:Strayradiantpowercanbeasignificantsourceoferrorinspectrophotometricmeasurements.SRPusuallyincreaseswiththepassageoftime;therefore,testingshouldbeperformedperiodically.Moreover,theSRPRtestisanexcellentindicatoroftheoverallconditionofaspectrophotometer.Acontrol-chartrecordoftheresultsofroutinelyperformedSRPRtestscanbeausefulindicatorofneedforcorrectiveactionor,atleast,ofthechangingreliabilityofcriticalmeasurements.Thistestmethodprovidesameansofdeterminingthestrayradiantpowerratioofaspectrophotometeratselectedwavelengthsinaspectralrange,asdeterminedbytheSRPfilterused,therebyrevealingthosewavelengthregionswheresignificantphotometricerrorsmightoccur.Itdoesnotprovideameansofcalculatingcorrectionstoindicatedabsorbance(ortransmittance)values.Thetestmethodmustbeusedwithcareandunderstanding,aserroneousresultscanoccur,especiallywithrespecttosomemoderngratinginstrumentsthatincorporatemoderatelynarrowbandpassSRP-blockingfilters.Thistestmethoddoesnotprovideabasisforcomparingtheperformanceofdifferentspectrophotometers.Note88212;Kaye(3)discussescorrectionmethodsofmeasuredtransmittances(absorbances)thatsometimescanbeusedifsufficientinformationonthepropertiesandperformanceoftheinstrumentcanbeacquired.SeealsoA1.2.5.Thistestmethoddescribestheperformanceofaspectrophotometerintermsofthespecifictestparametersused.Whenananalyticalsampleismeasured,absorptionbythesampleofradiationoutsideofthenominalbandpassattheanalyticalwavelengthcancauseaphotometricerror,underestimatingthetransmittanceoroverestimatingtheabsorbance,andcorrespondinglyunderestimatingtheSRPR.TheSRPRindicatedbythistestmethodusingSRPfiltersisalmostalwaysanunderestimationofthetruevalue(see1.3).Avaluecitedinamanufacturerx2019;sliteraturerepresentstheperformanceofanewinstrument,testedexactlyinaccordancewiththemanufacturerx2019;sspecification.Theimplicationisthatthemanufacturerx2019;sstatedSRPRcanserveasabenchmarkforfutureperformance,providedthattheuserperformsthemanufacturerx2019;sspecifiedtest.Itisrecommendedthatuserstestnewinstrumentspromptly,therebyestablishingacomparativebenchmarkintermsoftheirowntestingfacilities.Thesolutionfilterratiomethod(4.3)isaconvenientmethodforcontrol-chartingSRPR.Mielenz,etal.,(4)showthatitsresultstendtocorrelatewellwiththoseofthespecifiedwavelengthmethod,butforcriticalcomparisonwiththemanufacturerx2019;sspecification,themethodusedbythemanufacturermustbeused.BecausesomeinstrumentsreduceSRPbyincorporatingmoderatelynarrowbandpassSRP-blockingfiltersthatarechangedasthewavelengthrangeisscanned,itispossibleforSRPRdeterminationstobehighlyinaccurateifthecutoffwavelengthoftheSRPfilterfallstooclosetotheabsorptionedgeofaninstrumentx2019;sSRP-reducingfilter(3).1.1Strayradiantpower(SRP)canbeasignificantsourceoferrorinspectrophotometricmeasurements,andthedangerthatsucherrorexistsisenhancedbecauseitspresenceoftenisnotsuspected(1-4).Thistestmethodaffordsanestimateoftherelativeradiantpower,thatis,theStrayRadiantPowerRatio(SRPR),atwavelengthsremotefromthoseofthenominalbandpasstransmittedthroughthemonochromatorofanabsorptionspectrophotometer.Test-fil......
【中国标准分类号】:N33
【国际标准分类号】:
【页数】:11P.;A4
【正文语种】:英语


【英文标准名称】:RadioEquipmentandSystems(RES)-DigitalEnhancedCordlessTelecommunications(DECT)-CommonInterface(CI)TestCaseLibrary(TCL)-Part7:AbstractTestSuite(ATS)forNetwork(NWK)layer;PortableradioTermination(PT);EnglishversionETS30049
【原文标准名称】:无线电设备和系统(RES).数字增强无绳电信(DECT).一般界面(CI)的检验情况程序库(TCL).第7部分:中继层用抽象检验语句组(ATS).便携式无线电终端装置(PT)
【标准号】:DINETS300497-7-1997
【标准状态】:作废
【国别】:德国
【发布日期】:1997-07
【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】:规范(验收);便携的;网络层;无线电设备;连接;合格;公共的;定义;无线电工程;无线的;电信;无线电装置;使用;数字的;终端装置
【英文主题词】:conformity;networklayers;public;telecommunication;radioequipment;specification(approval);definitions;radiosystems;connections;digital;radioengineering;portable;applications;terminaldevices;cordl
【摘要】:
【中国标准分类号】:M34
【国际标准分类号】:33_060_50
【页数】:361P;A4
【正文语种】:德语