MIL-PRF-19500/548F
作者:标准资料网 时间:2024-05-08 20:17:21 浏览:9709
来源:标准资料网
MIL-PRF-19500/548F, PERFORMANCE SPECIFICATION SHEET, COUPLER, OPTO ELECTRONIC, SEMICONDUCTOR DEVICE, SOLID STATE, TYPES 4N47, 4N48, 4N49, 4N47A, 4N48A, 4N49A, 4N47U, 4N48U, 4N49U, 4N47BU, 4N48BU, AND 4N49BU, JAN, JANTX, JANTXV, AND JANS (15 SEP 2005)., This specification covers the performance requirements for solid state optically coupled isolators in which a gallium aluminum arsenide diode light source is optically coupled to a silicon NPN phototransistor. Four levels of product assurance are provided for each type as specified in MIL-PRF-19500.
【英文标准名称】:StandardTestMethodsforElectricalConductivityofAviationandDistillateFuels
【原文标准名称】:航空燃料和馏出燃料的电导率用标准试验方法
【标准号】:ASTMD2624-2007a
【标准状态】:现行
【国别】:
【发布日期】:2007
【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.J0.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:航空燃料;电导率;石油产品;测试
【英文主题词】:aviationfuels;conductivitymeter;conductivityunit;distillatefuels;electricalconductivity;in-line;picosiemenspermeter;restconductivity;staticdissipatoradditives;staticelectricity;Aviationfuels;Conductanceandconductivity(electrical)
【摘要】:Theabilityofafueltodissipatechargethathasbeengeneratedduringpumpingandfilteringoperationsiscontrolledbyitselectricalconductivity,whichdependsuponitscontentofionspecies.Iftheconductivityissufficientlyhigh,chargesdissipatefastenoughtopreventtheiraccumulationanddangerouslyhighpotentialsinareceivingtankareavoided.1.1Thesetestmethodscoverthedeterminationoftheelectricalconductivityofaviationanddistillatefuelswithandwithoutastaticdissipatoradditive.Thetestmethodsnormallygiveameasurementoftheconductivitywhenthefuelisuncharged,thatis,electricallyatrest(knownastherestconductivity).1.2Twotestmethodsareavailableforfieldtestsoffuelconductivity.Theseare:(1)portablemetersforthedirectmeasurementintanksorthefieldorlaboratorymeasurementoffuelsamples,and(2)in-linemetersforthecontinuousmeasurementoffuelconductivitiesinafueldistributionsystem.Inusingportablemeters,caremustbetakeninallowingtherelaxationofresidualelectricalchargesbeforemeasurementandinpreventingfuelcontamination.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.Forspecificprecautionarystatements,see7.1,7.1.1,and11.2.1.
【中国标准分类号】:E31
【国际标准分类号】:75_160_20
【页数】:10P.;A4
【正文语种】:
【英文标准名称】:Railwayrollingstock--Pantographs--Testmethods
【原文标准名称】:铁路车辆.导电弓架.检查方法
【标准号】:JISE6302-2000
【标准状态】:作废
【国别】:日本
【发布日期】:2000-09-21
【实施或试行日期】:
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:TechnicalCommitteeonRailwaysandRollingStock
【标准类型】:()
【标准水平】:()
【中文主题词】:架空接触网系统;铁路车辆零部件;检验;牵引电流集电器
【英文主题词】:traction-current-collectingdevices;;railwayvehiclecomponents;inspection
【摘要】:
【中国标准分类号】:S30
【国际标准分类号】:29_280;45_060_10
【页数】:10P;A4
【正文语种】:日语
