【英文标准名称】:Electricalapparatusforthedetectionandmeasurementofcombustibleortoxicgasesorvapoursorofoxygen-Requirementsonthefunctionalsafetyoffixedgasdetectionsystems
【原文标准名称】:易燃或有毒气体或蒸气或氧气的探测和测量用电气设备.混合气体探测系统的功能安全要求
【标准号】:BSEN50402-2005
【标准状态】:作废
【国别】:英国
【发布日期】:2005-12-30
【实施或试行日期】:2005-12-30
【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】:燃烧气体;浓缩;缺陷;失误误差;定义;检波器(回路);数字工程;电气设备;故障;失效率;功能效率;气体检测器;气体;测量;测量技术;氧;工作性能;安全要求;信号传输;SIL法;软件;规范(验收);固定的;试验;毒物;有毒气体;毒素;蒸气;警告装置
【英文主题词】:Burninggases;Concentration;Defects;Defectstolerances;Definition;Definitions;Detectors(circuits);Digitalengineering;Electricalappliances;Failure;Failurerates;Functionalefficiency;Gasdetectors;Gases;Measurement;Measuringtechniques;Oxygen;Performanceinservice;Safetyrequirements;Signaltransmission;SILmethods;Software;Specification(approval);Stationary;Testing;Toxic;Toxicgases;Toxins;Vapours;Warningdevices
【摘要】:ThisEuropeanStandardisapplicabletofixedgasdetectionsystemsforthedetectionandmeasurementofflammableortoxic1)gasesorvapoursoroxygen.ThisEuropeanStandardsupplementstherequirementsoftheEuropeanStandardsforelectricalapparatusforthedetectionandmeasurementofflammablegases,vapours(e.g.EN61779orEN50241),toxicgases(e.g.EN45544)oroxygen(e.g.EN50104).NOTE1TheseEuropeanStandardswillbementionedinthetextas"metrologicalstandards".NOTE2TheexamplesaboveshowthestateofthestandardisationforindustrialapplicationsatthetimeofpublishingthisEuropeanStandard.Theremaybeothermetrologicalstandardscoveringotherapplicationfields,forwhichthisstandardisalsoapplicable.NOTE3ForfixedapparatususedforsafetyapplicationswithaSILrequirementupto1andforportableapparatustheEuropeanStandardEN50271maybeappliedinsteadofthisEuropeanStandard.Applyingtheabovementionedmetrologicalstandardswillensurethemeasuringperformanceisadequateinnormaloperationofagasdetectionsystem.AdditionallytherequirementsofthisEuropeanStandardaddressthefunctionalsafetyofgasdetectionsystemsandencompasscriteriaforreliability,faulttoleranceandavoidanceofsystematicfaults.ThisEuropeanStandardwillleadtothecharacterisationofthegasdetectionsystembyaSIL-capabilityandrelatedhardwarefailureraterepresentingahierarchicalorderofsafetylevels.ThiswillallowtheusertoincorporatethegasdetectionsystemintoanoverallsafetysystemaccordingtothesafetyintegritylevelsofEN61508orthecategoriesofENISO13849-1(seeAnnexB).ThisEuropeanStandardisaproductstandardwhichisbasedonEN61508andincludesadditionalrequirementsofENISO13849-1.Itcoverspartofthephase9?realisation?oftheoverallsafetylifecycledefinedinEN61508-1.ThisEuropeanStandardisapplicableforgasdetectionsystems,whichmayconsistofthefollowingfunctionalunits:?gas-sampling;?sensor;?signaltransmission;?inputtocontrolunit;?signalprocessingincontrolunit;?outputfromcontrolunit.ThisEuropeanStandarddoesnotspecifyrequirementsfortheinstallationandmaintenanceofgasdetectionsystems.Italsodoesnotspecifythephysicalpositioningofsensors..ThisEuropeanStandarddoesnotspecifywhichSIL-capabilityissufficientforwhichapplication.NOTE4TheSIL-capabilityrequiredforanapplicationwillbespecifiedbytheuser(seeAnnexesAandB).
【中国标准分类号】:C81
【国际标准分类号】:13_320
【页数】:66P.;A4
【正文语种】:英语