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【英文标准名称】:Medicalelectricalequipment-Dosimetricinstrumentsusedfornon-invasivemeasurementofX-raytubevoltageindiagnosticradiology
【原文标准名称】:医疗电气设备.在放射诊断中X射线管电压的无伤害性测量用剂量测定仪器
【标准号】:BSEN61676-2002+A1-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2003-01-21
【实施或试行日期】:2003-01-21
【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】:计算机断层摄影;定义(术语);牙科学;测定;诊断;诊断(医学);诊断设备;剂量计;剂量测定;电气器具;电气工程;医用电气设备;电医学;设备安全性;辐照率表;批注;电离室;测量;医疗设备;医疗放射照相术;医学科学;医疗技术学;生产;辐射学;放射器具(医学);放射疗法;规范(验收);测试;X射线仪;X射线设备;X射线检查;X射线技术;X射线管组件;X射线电子管
【英文主题词】:Computedtomography;Definitions;Dentistry;Determinations;Diagnosis;Diagnosis(medical);Diagnosticequipment;Dosimeters;Dosimetry;Electricappliances;Electricalengineering;Electricalmedicalequipment;Electromedicine;Equipmentsafety;Exposure-ratemeters;Inscription;Ionizingchambers;Measurement;Medicalequipment;Medicalradiography;Medicalsciences;Medicaltechnology;Production;Radiology;Radiologyapparatus(medical);Radiotherapy;Specification(approval);Testing;X-rayapparatus;X-rayequipment;X-rayexamination;X-raytechnique;X-raytubeassemblies;X-raytubes
【摘要】:ThisInternationalStandardspecifiestheperformancerequirementsofinstrumentsasusedintheNON-INVASIVEMEASUREMENTofX-RAYTUBEVOLTAGEupto150kVandtherelevantcompliancetests.Thisstandardalsodescribesthemethodforcalibrationandgivesguidanceforestimatingtheuncertaintyinmeasurementsperformedunderconditionsdifferentfromthoseduringcalibration.ApplicationsforsuchmeasurementarefoundindiagnosticRADIOLOGYincludingmammography,COMPUTEDTOMOGRAPHY(CT),dentalradiologyandRADIOSCOPY.Thisstandardisnotconcernedwiththesafetyaspectofsuchinstruments.TherequirementsforelectricalsafetyapplyingtothemarecontainedinIEC61010-1.
【中国标准分类号】:C43
【国际标准分类号】:11_040_50;17_240;11_040_55
【页数】:36P.;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforDeterminingGelContentinCrosslinkedEthylenePlasticsUsingPressurizedLiquidExtraction
【原文标准名称】:用加压溶剂萃取法测定交联乙烯塑料中凝胶含量的标准试验方法
【标准号】:ASTMD7567-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D20.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:Manyimportantpropertiesofcrosslinkedethyleneplasticsvarywiththegelcontent.Hence,determinationofthegelcontentprovidesameansofbothcontrollingtheprocessandratingthequalityoffinishedproducts.Extractiontestspermitverificationofthedesiredgelcontentofanygivencrosslinkedethyleneplasticandtheyalsopermitcomparisonbetweendifferentcrosslinkedethyleneplastics,includingthosecontainingfillers,providedthat,forthelatter,thefollowingconditionsaremet:Thefillerisnotsolubleinxyleneortolueneattheextractiontemperatureandtheamountoffillerpresentinthecompoundisknownorcanbedetermined.Sufficientcrosslinkinghasbeenachievedtopreventmigrationoffillerduringtheextraction.Usuallyithasbeenfoundthat,atextractionlevelsupto50%,theextractionsolventremainsclearandfreeoffiller.Sincesomeoxidativedegradationofthematerialcanoccurattheextractiontemperaturesusedinthisprocedure,despitetheuseofaclosedcellwhichallowsforminimalintroductionofoxygen,asuitableantioxidantisaddedtothesolventtoinhibitsuchdegradation.Beforeproceedingwiththismethod,referenceshouldbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,ortestingparameters,orcombinationthereof,coveredinthematerialsspecificationshalltakeprecedenceoverthosementionedinthistestmethod.Iftherearenomaterialspecifications,thenthedefaultconditionsapply1.1Thegelcontentofcrosslinkedethyleneplasticsisdeterminedbysolventextractionwithxyleneortoluene.Thistestmethodisapplicabletoethyleneplasticsofalldensities,includingthosecontainingfillers;providedthefillersareinsolubleintheextractionsolvent(s).1.2Thistestmethodusespressurizedliquidextraction(PLE)toincreasethespeedandreducetheamountofsolventrequiredforsolventextraction.TheresultsofthismethodaresimilartoTestMethodD2765.1.3Extractiontestsshallbeperformedonsamplesofanyshape(see7.2).Specimensshallbeselectedfromthoseportionsofthearticlemostsusceptibletoinsufficientcrosslinkingorselectedfromportionsrepresentativeoftheentirearticle.Thistestmethodhasbeendevelopedforproductionandqualitycontrolofcrosslinkedpolyethylenepipebutmaybeapplicabletootherproductssuchasmultilayermaterialsandfibers.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thismethodmakesuseofminimalreagentsandallowsforsolventrecoveryandre-use.Duetotheuseofminimalreagents,healthandsafetyconcernsareminimizedincomparisontoothermethods.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecificprecautionarystatementsaregiveninSection10.Note18212;ThereisnoknownISOequivalenttothistestmethod.ThistestmethodissimilartoTestMethodD2765.
【中国标准分类号】:G31
【国际标准分类号】:83_080_20
【页数】:5P.;A4
【正文语种】:英语