【英文标准名称】:Industrialfans-Determinationoffansoundpowerlevelsunderstandardizedlaboratoryconditions-Envelopingsurfacemethod
【原文标准名称】:工业风扇.标准实验室条件下风扇声功率级的测定.包络面法
【标准号】:BSISO13347-3-2004
【标准状态】:作废
【国别】:英国
【发布日期】:2004-08-25
【实施或试行日期】:2004-08-25
【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】:空调系统;声压;声级;声压级;风扇;测量技术;噪声测量;包络面法;空气噪声;消声器;声学测量;实验室试验;通风机;声学性质和声学现象;工业设施
【英文主题词】:Acousticmeasurement;Acousticpropertiesandphenomena;Airbornenoise;Air-conditioningsystems;Envelopingsurfacemethods;Fans;Industrialfacilities;Laboratorytesting;Measuringtechniques;Noisemeasurements;Silencers;Soundlevel;Soundpressure;Soundpressurelevel;Ventilators
【摘要】:ThispartofISO13347appliestoindustrialfansasdefinedinISO5801andISO13349.Itislimitedtothedeterminationofairbornesoundemissionforthespecifiedset-ups.Vibrationisnotmeasured,noristhesensitivityofairbornesoundemissiontovibrationeffectsdetermined.ThesizesoffanwhichcanbetestedinaccordancewiththispartofISO13347arelimitedonlybythepracticalaspectsofthetestset-up.Dimensionallimitations,testfandimensions,andairperformancewillcontroltheroomsize,powerandmountingrequirementsforthetestfan.(SmallfansmaybetestedaccordingtothispartofISO13347ortoISO10302,accordingtousage).ThetestarrangementsinthispartofISO13347establishthelaboratoryconditionsnecessaryforasuccessfultest.RarelywillitbepossibletomeettheserequirementsinsituandthispartofISO13347isnotintendedforfieldmeasurements.Intendingusersareremindedthat,inthesesituations,theremaywellbeadditionalacousticsystemeffectswhereinletandoutletconditionsatthefanarelessthanideal.Theenvelopingsurfacemethodsmaybeusedforthedeterminationofopeninletand/oropenoutletsoundpowerleveloffansforthestandardizedinstallationtypesgivenin3.1.Anestimation(withincreaseduncertainty)ofductedsoundpowerforfanstoosmall,orotherwiseinconvenient,fortestingbythein-ductmethoddescribedinISO5136mayalsobeobtainedbytheadditionofendreflectioncorrections(seeAnnexCofISO13347-1:2004).
【中国标准分类号】:P48
【国际标准分类号】:17_140_20;23_120
【页数】:30P;A4
【正文语种】:英语


【英文标准名称】:Harmonizedsystemofqualityassessmentforelectroniccomponents:genericspecification:directlyheatednegativetemperaturecoefficientthermistors
【原文标准名称】:电子元器件质量评定协调体系.总规范.直接加热的负温度系数热敏电阻
【标准号】:BSCECC43000-1982
【标准状态】:作废
【国别】:英国
【发布日期】:1982-08-31
【实施或试行日期】:
【发布单位】:英国标准学会(BSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:L00;L13
【国际标准分类号】:
【页数】:44P;A4
【正文语种】:英语