【英文标准名称】:Measurementofquartzcrystalunitparameters-Basicmethodforthemeasurementofresonancefrequencyandresonanceresistanceofquartzcrystalunitsbyzerophasetechniqueina-network
【原文标准名称】:石英晶体单元参数的测量.第1部分:用π型网络零相位技术测量石英晶体单元谐振频率和谐振电阻的基本方法
【标准号】:BSEN60444-1-1997
【标准状态】:现行
【国别】:英国
【发布日期】:1993-09-15
【实施或试行日期】:1993-09-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:频率测量;补偿器(电气);介质装置;试验条件;再现性;校正;电路;相位测量(电);共振;石英;谐振器;晶体谐振器;波的性质和现象;压电器件;电阻;频率;共振频率;准确度;电波测量;电阻测量;电学测量;试验设备;电路网络
【英文主题词】:
【摘要】:Thisstandardspecifiesasimplemethodofmeasurementofresonancefrequencyandresonanceresistanceofquartzcrystalunitsanddescribesasuitablemeasuringnetwork.Themeasuringmethodandthenetworkaresuitableforuseoverthefrequencyrange1MHzto200MHzwithafractionalfrequencyaccuracyoftheorderof10withareproducibilityof10to10dependingonthetypeofcrystalunitbeingmeasured,andanaccuracyofthemeasurementofresonanceresistanceof±2%to±5%dependingontheaccuracyofthevoltagemeasurement.However,aboveapproximately100MHztheuseofthismeasuringmethodislimitedbytheeffectsoftheshuntcapacitanceC0ofthecrystalunitundertest.Toenablethemeasuringmethodtobeusedundertheseconditions,theuseofsomemethodofC0compensationisadvisable.AmethodofC0compensationwillbeissuedinIECPublication444-3asanIECreport.NOTEThemodificationstothemeasuringsystemandnetworkcontainedinthisstandardhavebeenintroducedtoensurethattheclaimscontainedwithinitareachievable.Theydonot,however,invalidatethenetworkproducedaccordingtothefirsteditionThesenetworksarestillacceptableasaninternationalstandardmethodofmeasurementofresonancefrequencyfxandresonanceresistanceRr.IfthereferenceresistorsdescribedinthestandardareslightlymodifiedtoallowinsertionintonetworksmanufacturedaccordingtothefirsteditionofPublication444thentheproblemofobtainingsatisfactoryreferenceresistorsissolved.
【中国标准分类号】:L21
【国际标准分类号】:31_140
【页数】:32P.;A4
【正文语种】:英语


【英文标准名称】:Water-tubeboilersandauxiliaryinstallations-Part7:requirementsforequipmentfortheboiler.
【原文标准名称】:水管锅炉和辅助设备.第7部分:锅炉设备的要求
【标准号】:NFE32-110-7-2002
【标准状态】:作废
【国别】:法国
【发布日期】:2002-09-01
【实施或试行日期】:2002-09-05
【发布单位】:法国标准化协会(FR-AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:作标记;热风机;监测用装置;文献工作;试验;安全装置;船舶;设备;水蓄热器;生产;蒸汽发生器;规范(验收);定义;定义;水管锅炉;蒸汽锅炉;结构试验
【英文主题词】:Calorifiers;Constructiontests;Definition;Definitions;Documentations;Equipment;Installationsinneedofmonitoring;Marking;Production;Safetydevices;Specification(approval);Steamboilers;Steamgenerators;Storagewaterheaters;Testing;Vessels;Water-tubeboilers
【摘要】:
【中国标准分类号】:J98
【国际标准分类号】:27_040
【页数】:55P.;A4
【正文语种】:其他