ANSI/ASTM D5305-1997 液化石油气蒸汽中乙硫醇的测定用试验方法
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【英文标准名称】:TestMethodfortheDeterminationofEthylMercaptaninLP-GasVapor
【原文标准名称】:液化石油气蒸汽中乙硫醇的测定用试验方法
【标准号】:ANSI/ASTMD5305-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:化学分析和测试;含量测定;液化石油气;测试
【英文主题词】:Chemicalanalysisandtesting;Determinationofcontent;Liquefiedpetroleumgas;Testing
【摘要】:ThistestmethodcoversarapidandsimpleprocedureusinglengthofstaintubesforfieldmeasurementofethylmercaptaninthevaporphaseofLP-gassystems.Althoughlength-of-staintubesareavailabletodetectethylmercaptanconcentrationsintherangeof0.5to120partspermillionvolume(ppmv),thistestmethodisspecificallyapplicabletosystemscontaining5ppmvormoreofethylmercaptaninLP-gasvapors.Note1-Achromatographictechniquecanbeusedformoreprecise,quantitativedeterminationofethylmercaptaninLP-gas.ThevaluesstatedinSI(metric)unitsaretoberegardedasthestandard.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E46
【国际标准分类号】:75_160_30
【页数】:
【正文语种】:英语
【英文标准名称】:Low-voltagefuses-Part2:Supplementaryrequirementsforfusesforusebyauthorizedpersons(fusesmainlyforindustrialapplication);AmendmentA1(IEC60269-2:1986/A1:1995);DeutscheFassungEN60269-2:1995/A1:1998
【原文标准名称】:低压熔断器.第2部分:专职人员使用的熔断器(主要是工业用熔断器)的补充要求.修改件A1
【标准号】:DINEN60269-2/A1-1999
【标准状态】:作废
【国别】:德国
【发布日期】:1999-09
【实施或试行日期】:1999-09-01
【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】:低压电器;材料;专家;工业;作标记;低压熔断器;特性;试验;低电压;电气工程;种植;熔断器;专业电工;绝缘;规范(验收);产品规范;材料规范
【英文主题词】:
【摘要】:
【中国标准分类号】:K31
【国际标准分类号】:29_120_50
【页数】:6P;A4
【正文语种】:德语
【英文标准名称】:Magneticresonanceequipmentformedicalimaging-Determinationofessentialimagequalityparameters
【原文标准名称】:医疗成象磁共振设备.成像质量基本参数的测定
【标准号】:BSEN62464-1-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2007-07-31
【实施或试行日期】:2007-07-31
【发布单位】:英国标准学会(GB-BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:验收检验;验收试验;稳定性测试;定义;诊断(医学);电气工程;电医学;图例;图象增强器;图象质量;成象;检验;磁共振设备;测量技术;医疗器械;医疗放射照相术;医学科学;医疗技术学;质量;质量保证;质量要求;射线摄影;辐射摄影术;辐射学;射线检查;额定值;安全工程;扫描方法;测试;测试条件;X射线;X射线仪;X射线设备;X射线检验;X射线技术
【英文主题词】:Acceptanceinspection;Acceptancetests;Constancytesting;Definition;Diagnosis(medical);Electricalengineering;Electromedicine;Illustrations;Imageintensifiers;Imagequality;Imaging;Inspection;Magneticresonanceequipment;Measuringtechniques;Medicalinstruments;Medicalradiography;Medicalsciences;Medicaltechnology;Quality;Qualityassurance;Qualityrequirements;Radiographs;Radiography;Radiology;Radioscopy;Ratings;Safetyengineering;Scanningmethods;Testing;Testingconditions;X-ray;X-rayapparatus;X-rayequipment;X-rayexamination;X-raytechnique;X-rays
【摘要】:ThisinternationalstandardspecifiesmeasurementproceduresforthedeterminationofmanyessentialmedicalMREQUIPMENTimagequalityparameters.Measurementproceduresasaddressedinthisstandardaresuitablefor:-qualityassessmentintheACCEPTANCETEST;-qualityassuranceintheCONSTANCYTEST.Inaddition,themeasurementproceduresspecifiedinthisstandardmayalsobeusefulfortypetests,althoughthatisnotanobjectiveofthisstandard.Thisstandarddoesnotaddress:-requiredlevelsofperformanceforACCEPTANCETESTandCONSTANCYTEST;-imagequalityassessmentofhighfieldMREQUIPMENTgreaterthan4T,ifnototherwisestated;-imagequalityaffectedbyMR-compatibilityissues;-specialdiagnosticproceduressuchasflowimaging,perfusion,diffusion,radiotherapyandimage-guidedtherapyapplications;-typetests.ThescopeofthisstandardisalsolimitedtomeasuringimagequalitycharacteristicsinTESTDEVICES,notinPATIENTimages.Themeasurementproceduresspecifiedinthisstandardaredirectedto:a)MANUFACTURERS,whocandemonstratecompliancebyperformingacceptanceandconstancymethodsasdescribedbythisstandard,b)testhouses,whichcanconfirmperformanceofMREQUIPMENTusingmethodsdescribedinthisstandard,c)regulatoryauthorities,whocanreferencethisstandard,andd)RESPONSIBLEORGANISATIONSwhowanttoperformACCEPTANCEandCONSTANCYTESTSusingmethodsdescribedinthisstandard.Theessentialimagequalityparametersandmeasurementmethodologiesdefinedinthisstandardare:-SIGNAL-TO-NOISERATIO,-UNIFORMITY,-SLICETHICKNESSandSLICEPROFILE,-GEOMETRICDISTORTION,-SPATIALRESOLUTION,and-ghosting.Thisstandarddescribesthepreferredmeasurementprocedures.ItalsodescribesalternativemethodsinAnnexA.Thepreferredtestmethodsmaybesubstitutedwiththealternativemethods.Ifnecessary,othermethodsnotdescribedinthisstandardmaybeused,providedtheseothertestmethodsaredocumentedandvalidatedagainstthemethodsdescribedinthestandard.Validationofothertestmethodsrequiresananalysisoftestsensitivitytothesameparameterofinterestandananalysisoftheinsensitivityofthetesttootherunrelatedparametersandshoulddemonstrateasimilar,orbetter,levelofsensitivitytothesameparameterofinterestandasimilar,orbetter,levelofrobustnessagainstunrelatedparameters.Allmethodsshallproducequantitativeresults.Therationaletothepreferredandalternatemethods,andtheirpitfalls,aredescribedinAnnexB.ThisstandardalsopresentsrequirementsforCONSTANCYTESTSsuitableforMREQUIPMENTqualityassuranceprogramsconcerningessentialimagequalityparameters.TherearenopreferredCONSTANCYTESTmethods,toprovideflexibilityinusingexistingautomatedprocedureswhereavailable,butsuggestedexamplesoftestmethodsarefoundinAnnexA.Ifnecessary,otherCONSTANCYTESTmethodsnotdescribedinthisstandardmaybeused.SincetheneedsofRESPONSIBLEORGANISATIONS'qualityassuranceprogramsmayvary,RESPONSIBLEORGANISATIONSareencouragedtodeterminethenecessaryscopeoftests,qualityofthetests,andthesensitivityofthedataanalysisetc.Thisstandardplacesanemphasisonconsistentlyrepeatable,automatedmeasuringtoolsthatfacilitatetrendanalysisandthefrequentquicktestingofasmallsetofimportantparameterswhicharesensitivetotheoveralloperatingcharacteristicsoftheMREQUIPMENT.
【中国标准分类号】:C43
【国际标准分类号】:11_040_50
【页数】:82P.;A4
【正文语种】:英语
