【英文标准名称】:Measurementofquartzcrystalunitparameters-Part6:measurementofdriveleveldependance(DLD).
【原文标准名称】:石英晶体元件的参数测量.第6部分:驱动水平依赖测量
【标准号】:NFC93-626-2001
【标准状态】:现行
【国别】:法国
【发布日期】:2001-07-01
【实施或试行日期】:2001-07-20
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Crystalresonators;Electricalengineering;Electronicequipmentandcomponents;Excitationquantity;Measurement;Parameters;Piezoelectric;Piezoelectricdevices;Piezoelectricity;Quartzcrystals;Ratings
【摘要】:
【中国标准分类号】:L21
【国际标准分类号】:31_140
【页数】:19P;A4
【正文语种】:其他


【英文标准名称】:StandardTestMethodforEffectofAirSupplyonSmokeDensityinFlueGasesFromBurningDistillateFuels
【原文标准名称】:空气供给对燃料馏分燃烧产生的烟道气中烟密度影响的标准试验方法
【标准号】:ASTMD2157-1994(2003)
【标准状态】:现行
【国别】:
【发布日期】:1994
【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】:D02.E0.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:蒸馏;含量测定;通气;试验;石油产品;润滑剂;密度;含量;烟
【英文主题词】:heatingoil;kerosine;smokedensity
【摘要】:Thistestmethodrelatesefficiencyofoperationofdomesticheatingequipmenttocleanburning.Reducingcombustionairinaburnergivesmoreefficientoperation.Theextenttowhichcombustionaircanbereducedislimitedbytheonsetofunacceptablesmokeproduction.Bydelineatingtherelationbetweensmokedensityandairsupply,thistestmethod(togetherwithnetstacktemperaturedata)definesthemaximumefficiencyforagiveninstallationatanyacceptablesmokelevel.Forcertaintypesofequipment,suchastherotarywall-flameburner,toomuchexcessairwillcausesmokeaswellastoolittle.Forthesecases,thepointofminimumexcessairattheacceptablesmokelevelindicatestheoptimumefficiency.Theoperatingtemperaturesoftheequipmentwillaffectthesetestresults.Therelationofexcessairtosmokedensityisthussusceptibletosomechangeatdifferentpointsinanoperatingcycle.Inpractice,anadequatecompromiseispossiblebyoperatingtheburnerfor15minbeforeanyreadingsarerecordedandthenobtainingthetestdatawithinasucceeding25-minperiod.Underlaboratoryconditions,CO2readingsarereproducibletox00B1;0.3%andsmokereadingsarereproducibletox00B1;x00BD;smokespotnumber.1.1Thistestmethodcoverstheevaluationoftheperformanceofdistillatefuelsfromthestandpointofclean,efficientburning.ItisintendedprimarilyforusewithhomeheatingequipmentburningNo.1orNo.2fueloils.Itcanbeusedeitherinthelaboratoryorinthefieldtocomparefuelsusingagivenheatingunitortocomparetheperformanceofheatingunitsusingagivenfuel.1.2Thevaluesininch-poundunitsaretoberegardedasthestandard.Thevaluesinparenthesesareprovidedforinformationonly.Arbitraryandrelativeunitsarealsoused.Note18212;Thistestmethodappliesonlytopressureatomizingandrotary-typeburners.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:3P.;A4
【正文语种】: