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【英文标准名称】:Electromagneticcompatibility-Electricalapparatusforthedetectionandmeasurementofcombustiblegases,toxicgasesoroxygen
【原文标准名称】:电磁兼容性.可燃气体、有毒气体或氧气检测和测量用电气设备
【标准号】:BSEN50270-1999
【标准状态】:作废
【国别】:英国
【发布日期】:1999-10-15
【实施或试行日期】:1999-10-15
【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】:检波器(回路);测量技术;定义;EMC电磁兼容性;规范(验收);电磁兼容性;试验;电气设备;气体燃料;有毒气体;兼容性;氧;干扰辐射;气体;浓缩;测量;毒素;气体检测器;可燃性环境;干扰抑制;大气
【英文主题词】:Atmosphere;Compatibility;Concentration;Definition;Definitions;Detectors(circuits);Electricalappliances;Electromagneticcompatibility;EMC;Flammableatmospheres;Fuelgases;Gasdetectors;Gases;Interferencerejections;Interferingemissions;Measurement;Measuringtechniques;Oxygen;Specification(approval);Testing;Toxicgases;Toxins
【摘要】:ThisEuropeanStandardspecifiesrequirementsfortheelectromagneticcompatibility(EMC)forelectricalapparatusforthedetectionandmeasurementofcombustiblegases,toxicgasesoroxygen.Thisstandardappliestoapparatusintendedforuseintheresidential,commercialandlight-industrialenvironmentaswellastoapparatusintendedforuseintheindustrialenvironmentTheapparatusmaybea.c.-,d.c.-orbatterypowered.ThisEuropeanStandardisalsoapplicabletoapparatuswhichisintendedforuseinhazardousareaswhichmaycontainexplosiveorpotentiallyexplosiveatmospheres.Thisstandardspecifiesrequirementsforimmunitytestsinrelationtocontinuousandtransient,conductedandradiateddisturbancesincludingelectrostaticdischargesandalsoforemissiontests.Therequirementsarespecifiedforeachconsideredport.Theserequirementshavebeenselectedsoastoensureanadequatelevelofcompatibilityforapparatusattheappropriatelocations.Thelevelsdonothowevercoverextremecaseswhichmayoccurinanylocationbutwithanextremelylowprobabilityofoccurrence.NOTEInspecialcasessituationswillarisewherethelevelofdisturbancemayexceedthelevelsspecifiedinthisstandard,e.g.whereanapparatusisinstalledinproximitytoindustrial,scientificormedical(ISM)equipmentasspecifiedinEN55011orwhereahand-heldtransmitterisusedincloseproximitytoanapparatus.Intheseinstancesspecialmitigationmeasuresmayhavetobeemployed.ApparatusfallingwithinthescopeofthisEuropeanStandardisclassifiedasfollowsbythefollowingtypes.Type1:apparatusintendedforuseintheresidential,commercialandlight-industrialenvironment,asdescribedinEN50081-1andEN50082-1.Type2:apparatusintendedforuseintheindustrialenvironment,asdescribedinEN50081-2andEN50082-2.ThisEuropeanStandarddoesnotapplytoanyofthefollowing:—apparatusintendedforthedetectionofdustsormistsinair;—scientificorlaboratorybasedapparatususedonlyforanalysisormeasurement;—apparatususedexclusivelyforprocessmeasurementpurposes;—apparatusformedicalpurposes;—apparatusintendedforthedirectmeasurementofautomotiveexhaustgases.note:1)Theword"toxic"isusedinaccordancewithitsdictionarydefinitionandincludes"harmful","toxic"and"verytoxic"meanings.
【中国标准分类号】:L06
【国际标准分类号】:
【页数】:14P.;A4
【正文语种】:英语


【英文标准名称】:Polymer-BasedCrownandBridgeMaterials
【原文标准名称】:聚合物基的牙冠和齿桥材料
【标准号】:ANSI/ADA53-1999
【标准状态】:作废
【国别】:美国
【发布日期】:1999
【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】:桥;牙科设备;牙科材料;牙科学;医疗技术学;高聚物
【英文主题词】:Bridges;Dentalequipment;Dentalmaterials;Dentistry;Medicaltechnology;Polymers
【摘要】:Thisspecificationcoverspolymer-basedcrownandbridgematerialsforlaboratory-fabricatedpermanentfacingsoranteriorcrownswhichmayormaynotbeattachedtoametalsubstructure.Thisspecificationalsoappliestopolymer-basedcrownandbridgematerialsforwhichthemanufacturerclaimsadhesiontothemetalsib-framewithoutmacromechanicalretention,suchasbeadsorwires.Thisspecificationfurtherclassifiespolymer-basedcrownandbridgematerialsandspecifiestherequirements;italsospecifiesthetestmethodstobeusedtodeterminecompliancewiththeserequirements.
【中国标准分类号】:C33
【国际标准分类号】:11_060_10
【页数】:
【正文语种】:英语