标准资料网-标准资料免费资源平台

【英文标准名称】:Explosiveatmospheres-Part29-2:Gasdetectors-Selection,installation,useandmaintenanceofdetectorsforflammablegasesandoxygen
【原文标准名称】:爆炸性气体环境.第29-2部分:气体探测器.易燃气体和氧用探测器的选择、安装、使用和维护
【标准号】:BSEN60079-29-2-2007
【标准状态】:现行
【国别】:英国
【发布日期】:2008-02-29
【实施或试行日期】:2008-02-29
【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】:分析仪;燃烧气体;浓缩;团料;定义;检测;检波器(回路);电器;电气设备;电气工程;电驱动装置;防爆;爆炸安全;爆炸性环境;防火安全;可燃性环境;易燃材料;气体浓度;气体检测器;气体测量仪器;混合气体;气敏元件;指导手册;工业;装置;维修;测量;测量仪器;操作;氧;缺氧;参数;便携的;潜在爆炸物;特性;安全工程;安全要求;选择;传感器;规范(验收);火焰表面传播;试验设备;测试;贸易;蒸气压力;蒸气
【英文主题词】:Analyzers;Burninggases;Concentration;Conglomerates;Definition;Definitions;Detection;Detectors(circuits);Electricappliances;Electricalappliances;Electricalengineering;Electrically-operateddevices;Explosionprotection;Explosionsecurity;Explosiveatmospheres;Firesafety;Flammableatmospheres;Flammablematerials;Gasconcentrations;Gasdetectors;Gasmeasuringinstruments;Gasmixtures;Gassensors;Guidebooks;Industries;Installations;Maintenance;Measurement;Measuringinstruments;Operation;Oxygen;Oxygendeficiency;Parameters;Portable;Potentiallyexplosivematerials;Properties;Safetyengineering;Safetyrequirements;Selection;Sensors;Specification(approval);Surfacespreadofflame;Testequipment;Testing;Trade;Vapourpressure;Vapours
【摘要】:ThispartofIEC60079-29givesguidanceon,andrecommendedpracticefor,theselection,installation,safeuseandmaintenanceofelectricallyoperatedgroupIIapparatusintendedforuseinindustrialandcommercialsafetyapplicationsforthedetectionandmeasurementofflammablegasescomplyingwiththerequirementsofIEC60079-29-1.Thisstandardisapplicableforoxygenmeasurementforthepurposeofinertisationwhereexplosionprotectionisprovidedbytheexclusionofoxygeninsteadofmeasuringthecombustiblegasesorvapourspresent.Thisstandardisacompilationofpracticalknowledgetoassisttheuser,andappliestoapparatus,instrumentsandsystemsthatindicatethepresenceofaflammableorpotentiallyexplosivemixtureofgasorvapourwithairbyusinganelectricalsignalfromagassensortoproduceameterreading,toactivateavisualoraudiblepre-setalarmorotherdevice,oranycombinationofthese.Suchapparatusmaybeusedasameansofreducingtheriskwheneverthereisthepossibilityofarisktolifeorpropertyspecificallyduetotheaccumulationofacombustiblegas-airmixture,byprovidingsuchwarnings.Itmayalsobeusedtoinitiatespecificsafetyprecautions(e.g.plantshutdown,evacuation,fireextinguishingprocedures).Thisstandardisapplicabletoallnewpermanentinstallationsand,wherereasonablypracticable,toexistingpermanentinstallations.Itisalsoapplicabletotemporaryinstallations,whetherneworexisting.Similarlyitisapplicabletothesafeuseofportableortransportableapparatus,irrespectiveoftheageorcomplexityofsuchapparatus.Sincemuchmodernapparatusofthistypealsoincludesoxygendeficiencydetectionand/orspecifictoxicgassensors,someadditionalguidanceisgivenforthesetopics.NOTEWheninclassifiedareas,theapparatusshouldbesoinstalledandusedthatitisnotcapableofitselfignitingacombustiblegas-airmixture.ItshouldthereforecomplywiththerequirementsofIEC60079-10.Forthepurposesofthisstandard,exceptwherespecificallystatedotherwise,flammablegasesshallincludeflammablevapours.ThisstandardappliesonlytogroupIIapparatus(i.e.apparatusintendedforuseinindustrialandcommercialsafetyapplications,involvingareasclassifiedinaccordancewithIEC60079-10).Forthepurposesofthisstandard,apparatusincludesa)fixedapparatus;b)transportableapparatus;andc)portableapparatus.Thisstandardisnotintendedtocover,butmayprovideusefulinformation,forthefollowing:a)apparatusintendedonlyforthedetectionofnon-flammabletoxicgases;b)apparatusoflaboratoryorscientifictypeintendedonlyforanalysisormeasurementpurposes;c)apparatusintendedforundergroundminingapplications(groupIapparatus);d)apparatusintendedonlyforprocesscontrolapplications;e)apparatusintendedforapplicationsinexplosivesprocessingandmanufacture;f)apparatusintendedforthedetectionofapotentiallyflammableatmosphereresultingfromdustormistinair;g)openpathapparatusnotusedforpointmeasurement.
【中国标准分类号】:C81
【国际标准分类号】:13_320;29_260_20
【页数】:106P.;A4
【正文语种】:英语


【英文标准名称】:Informationtechnology-Computergraphicsandimageprocessing-GraphicalKernelSystem(GKS)-Audittrail
【原文标准名称】:信息技术.计算机制图和成像处理.图形核心系统(GKS).核查跟踪
【标准号】:BSISO/IEC7942-3-1999
【标准状态】:现行
【国别】:英国
【发布日期】:1999-05-15
【实施或试行日期】:1999-05-15
【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】:质量检查;听觉跟踪;质量保证;计算机制图;句法;信息交流;数据处理(软件);计算机程序;数据转换;数据处理;程序设计;数据布置
【英文主题词】:Artificiallanguages;Auditing;Computergraphics;Definition;Extentoftesting;GKS;Graphicalkernelsystem;Imageprocessing;Informationtechnology
【摘要】:ThispartofISO/IEC7942providesafileformatforcapturingthesequenceofGKSfunctionsandtheirparam-etersinvokedbyanapplication,forsubsequentplayback.
【中国标准分类号】:L81
【国际标准分类号】:35_140
【页数】:46P;A4
【正文语种】:英语