MIL-STD-27733

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MIL-STD-27733, DEPARTMENT OF DEFENSE STANDARD PRACTICE: MODIFICATION AND MARKING REQUIREMENTS FOR TEST EQUIPMENT IN AEROSPACE VEHICLES AND RELATED SUPPORT EQUIPMENT (18 MAY 1998)., This standard identifies marking, safety, and configuration controlpractices for temporary non-standard modifications on Department of Defense ownedaerospace vehicles, and related support equipment in support of research,development, test and evaluation.
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【英文标准名称】:Railwaysignallingsymbols.Specificationforschematicsymbols
【原文标准名称】:铁路信号符号.图形符号规范
【标准号】:BS376-1-2012
【标准状态】:现行
【国别】:英国
【发布日期】:2012-07-31
【实施或试行日期】:2012-07-31
【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】:色灯信号机(铁路);工程图;图解表示法;图形符号;设计图;道岔转换;铁路应用设施;铁路控制系统;铁路设备;铁路固定设备;铁路信号;铁路轨道;铁路;进路表示器;图解表示;臂板信号机(铁路);信号装置;符号;技术制图
【英文主题词】:Colour-lightsignals(railways);Engineeringdrawings;Graphicrepresentation;Graphicsymbols;Plans;Pointwork;Railwayapplications;Railwaycontrolsystems;Railwayequipment;Railwayfixedequipment;Railwaysignals;Railwaytrack;Railways;Routeindicators;Schematicrepresentation;Semaphoresignals(railways);Signaldevices;Symbols;Technicaldrawing
【摘要】:ThisBritishStandardspecifiesthesymbolstobeusedonrailwaysignallingplansbutdoesnotprovideguidanceontheirapplication.
【中国标准分类号】:S60
【国际标准分类号】:01_080_20;45_020
【页数】:38P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforAlternating-CurrentMagneticPropertiesofToroidalCoreSpecimensUsingtheVoltmeter-Ammeter-WattmeterMethod
【原文标准名称】:使用伏特计-电流计-瓦特计方法测试环形铁芯试样交流磁性能的标准试验方法
【标准号】:ASTMA927/A927M-2004
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:A06.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:alternatingcurrent;core;coreloss;flatrolled;laminatedcore;lamination;magnetic;magneticmaterial;magnetictest;permeability
【摘要】:ThistestmethodisaderivativeofTestMethodA697/A697MspecificallydesignedfortestingoftoroidalcoreswhicharenotcoveredinTestMethodA697/A697Mandfortestingatmagneticfluxdensitiesabovethekneeofthemagnetizationcurve.Specimensizetypicallyrangesfrom1to1.25in.[25.4to31.8mm]ininsidediameterto1.5in.[38.1mm]inoutsidediameterwithweightsrangingfrom30to60g.Providedthetestequipmentissuitablychosen,thereisnoobviouslimittotheoverallsizeofcorethatcanbetested.Ifbasicmaterialpropertiesaredesired,thentherequirementsof5.1mustbeobserved.Thereproducibilityandrepeatabilityofthistestmethodaresuchthatthistestmethodissuitablefordesign,specificationacceptance,serviceevaluation,andresearchanddevelopment.Whentestingundersinusoidalfluxconditionsatmagneticfluxdensitiesapproachingsaturation,highlypeakedmagnetizingwaveformswillbepresent,andthetestinstrumentsusedmusthavecrestfactorcapabilitiesofatleast3;otherwiseerroneousresultswillbeobtained.1.1Thistestmethodcoversthedeterminationofseveralacmagneticpropertiesofeitherlaminatedringortoroidaltapewoundcoresmadefromflatrolledproduct.1.2Thistestmethodcoverstestequipmentandproceduresfordeterminationofspecificcoreloss,specificexcitingpower,andpeakpermeabilityforpowerandaudiofrequencies(50to20000Hz)undersinusoidalfluxconditions.1.3Thistestmethod,becauseoftheuseofafeedback-controlledpoweramplifier,iswellsuitedfordeterminationofacmagneticpropertiesatmagneticfluxdensitiesabovethekneeofthemagnetizationcurveandisparticularlyusefulfortestingofhigh-saturationiron-cobaltalloys(forexample,alloyslistedinSpecificationA801),althoughuseofthistestmethodisnotrestrictedtoaparticulartypeofmaterial.1.4ThistestmethodshallbeusedinconjunctionwithPracticeA34/A34MandTerminologyA340.1.5Thevaluesandequationsstatedincustomary(cgs-emuandinch-pound)orSIunitsaretoberegardedseparatelyasstandard.Withinthisstandard,SIunitsareshowninbracketsexceptforthesectionsconcerningcalculationswherethereareseparatesectionsfortherespectiveunitsystems.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H21
【国际标准分类号】:17_220_20
【页数】:5P.;A4
【正文语种】:英语