SJ/T 959-2000 电子束管电极接线图图形符号

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基本信息
标准名称:电子束管电极接线图图形符号
英文名称:Figure symbols for electrode connection diagrams of electron beam tubes
中标分类: 电子元器件与信息技术 >> 电真空器件 >> 电子束管
ICS分类: 电子学 >> 电子管
替代情况:SJ 959-1975
发布部门:中华人民共和国信息产业部
发布日期:2000-12-28
实施日期:2001-03-01
首发日期:1900-01-01
作废日期:1900-01-01
提出单位:中华人民共和国信息产业部
归口单位:中华人民共和国信息产业部
起草单位:中国电子技术标准化研究所
起草人:马田庆、朱尔明、钱嘉林
出版社:电子工业出版社
出版日期:2001-02-01
页数:11页
适用范围

本标准规定了示波管、指示管、显像管等类型的电子束管电级接线图图形符号的绘制原则和总的绘制方法。
本标准适用于电子束管的电极接线图。

前言

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引用标准

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所属分类: 电子元器件与信息技术 电真空器件 电子束管 电子学 电子管
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【英文标准名称】:CraneBoomstop
【原文标准名称】:起重机臂停止器
【标准号】:ANSI/SAEJ220-1998
【标准状态】:作废
【国别】:美国
【发布日期】:1998-07
【实施或试行日期】:
【发布单位】:美国国家标准学会(ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:机动车工程;帆底横杆;起重机;动臂起重机;汽车起重机
【英文主题词】:Automotiveengineering;Booms;Cranes;Jibcranes;Mobilecranes
【摘要】:
【中国标准分类号】:J80
【国际标准分类号】:53_020_20
【页数】:
【正文语种】:英语


【英文标准名称】:Acoustics-Noiseemittedbymachineryandequipment-Measurementofemissionsoundpressurelevelsataworkstationandatotherspecifiedpositions-Surveymethodinsitu
【原文标准名称】:声学.机械装置及设备发出的噪声.工作地点和其它试验场所声压级的测量.现场调查法
【标准号】:BSENISO11202-1996
【标准状态】:作废
【国别】:英国
【发布日期】:1996-11-15
【实施或试行日期】:1996-11-15
【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】:再现性;准确度;测量特征;试验设备;试验条件;现场试验;声学测量;操作工位;噪声(环境的);等级(质量);声学;声强
【英文主题词】:Acousticmeasurement;Acoustictesting;Acoustics;Airbornenoise;Definitions;Emission;Emissionmeasurement;Ergonomics;Externalnoise;Fieldtesting;Insitu;Inserts;Instruments;Machinenoise;Machines;Measurement;Measuringenvironment;Measuringincertainity;Measuringinstruments;Measuringtechniques;Methods;Noise;Noiseemissions;Noisemeasurements;Operatingconditions;Operatingstations;Position;Precision;Radiation;Soundintensity;Soundlevels;Soundpressure;Soundpressurelevel;Soundpropagation;Specification(approval);Workingplaces
【摘要】:1GeneralThisInternationalStandardspecifiesamethodformeasuringtheemissionsoundpressurelevelsofmachineryandequipment,ataworkstationandatotherspecifiedpositionsnearby,inasemi-reverberantfield.EmissionsoundpressurelevelaremeasuredasA-weightedand,ifrequired,C-weightedpeak.NOTE1ThecontentsofthisandrelatedInternationalStandardsaresummarizedintable1ofISO11200:1995.Amethodisgivenfordeterminingalocalenvironmentcorrection(subjecttoaspecifiedlimitingmaximumvalue)tobeappliedtothemeasuredsoundpressurelevelsinordertoexcludeatleastpartoftheeffectsofreflectionsfromreflectingsurfacesotherthantheplaneonwhichthemachineryorequipmentisplaced.Thiscorrectionisbasedontheequivalentsoundab-sorptionareaofthetestroom.Aworkstationisoccupiedbyanoperator.Itmaybelocatedinopenspaceintheroomwherethesourceoperates,orinacabfixedtothesource,orinanen-closureremotefromthesource.Oneormorespeci-fiedpositionsmaybelocatedinthevicinityofanattendedorunattendedmachine.Suchpositionsaresometimesreferredtoasbystanderpositions.ThisInternationalStandardspecifiesrequirementsforthesurveygradeofaccuracyonthetestenvironmentandinstrumentation.Instructionsaregivenforthein-stallationandoperationofthemachineundertestandforthechoiceofmicrophonepositionsfortheworkstationandforotherspecifiedpositions.Thepurposeofthemeasurementsistopermitcomparisonoftheperformanceofdifferentunitsofagivenfamilyofmachineryorequipment,underdefinedenviron-mentalconditionsandstandardizedmountingandop-eratingconditions.ThedataobtainedmayalsobeusedforthedeclarationandverificationofemissionsoundpressurelevelsasspecifiedinISO4871.NOTE2Atanygivenpositioninrelationtoaparticularmachine,andforgivenmountingandoperatingconditions,theemissionsoundpressurelevelsdeterminedbythemethodofthisInternationalStandardwillingeneralbelowerthanthedirectlymeasuredsoundpressurelevelsforthesamemachineinthetypicalworkroomwhereitisused.Thisisduetoreverberationandthecontributionsofothermachines.Amethodofcalculatingthesoundpressurelev-elsinthevicinityofamachineoperatingaloneinaworkroomisgiveninISO11690-3.Commonlyobserveddifferencesare1dBto5dB,butinextremecasesthedif-ferencemaybeevengreater.2TypesofnoiseandnoisesourcesThemethodspecifiedinthisInternationalStandardisapplicabletoalltypesofmachinery,bothmovingandstationary,forindoororoutdooruse.Themethodisapplicabletomachinesofallsizes,andtoalltypesofnoiseasdefinedinISO2204andISO12001.3TestenvironmentThemethodisapplicabletoanindoororoutdooren-vironmentwithoneormorereflectingplanespresent,meetingspecifiedrequirements.4SpecifiedpositionsThisInternationalStandardisapplicabletoworkstationsandotherspecifiedpositionswhereemissionsoundpressurelevelsaretobemeasured.Examplesofappropriatepositionswheremeasure-mentsmaybemadeincludethefollowing:a)workstationlocatedinthevicinityofthemachineundertest;thisisthecaseformanyindustrialmachinesanddomesticappliances;b)workstationwithinacabwhichisanintegralpartofthemachineundertest;thisisthecaseformanyindustrialtrucksandearth-movingma-chines;c)workstationwithinapartialortotalenclosure(orbehindascreen)suppliedbythemanufacturerasanintegralpartofthemachineryorequipment;d)workstationpartiallyortotallyenclosedbythemachineundertest;thissituationmaybeen-counteredwithsomelargeindustrialmachines;e)bystanderpositionsoccupiedbyindividualsnotresponsiblefortheoperationofthemachineun-dertest,butwhomaybeinitsimmediatevicini
【中国标准分类号】:Z32
【国际标准分类号】:17_140_20
【页数】:24P;A4
【正文语种】:英语