SAE AIR877 Aerospace - Particle Count Data Conversion and Extrapolation
时间:2024-05-15 23:49:15 来源: 标准资料网 作者：标准资料网 阅读：8922
Product Code:SAE AIR877
Title:Aerospace - Particle Count Data Conversion and Extrapolation
Issuing Committee:A-6c1 Contamination And Filtration Committee
Scope: This Aerospace Information Report (AIR) describes a mathematical model that can be used to analyze particle count data. Particle counts that fit the model can be graphically displayed, converted from one counting size-frequency range to another, and extrapolated to estimate counts beyond the measured range. Derivation, applications and calculations are described. Cumulative particle counts larger than stated size-range are fitted against a modified log-normal distribution function by plotting on special log-log graph paper. Many real particle distributions approximate a straight line, showing good fit for this log-normal model. The resultant plot provides a basis for further analysis, including size-range conversion and extrapolation.
【英文标准名称】:StandardClassificationforDryPigmentaryTitaniumDioxideProducts
【原文标准名称】:二氧化钛干颜料色素的标准分类
【标准号】:ASTMD476-2000
【标准状态】:现行
【国别】:美国
【发布日期】:2000
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:涂料;颜料
【英文主题词】:pigments;paints
【摘要】:
【中国标准分类号】:G54
【国际标准分类号】:87_060_10
【页数】:
【正文语种】:英语
【英文标准名称】:Explosiveatmospheres.Part31:Equipmentdustignitionprotectionbyenclosure"t"
【原文标准名称】:爆燃性环境.利用附件"t"的器材灰尘点燃防护
【标准号】:BSEN60079-31-2009
【标准状态】:现行
【国别】:英国
【发布日期】:2010-09-30
【实施或试行日期】:2010-09-30
【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】:定义(术语);设计;灰尘爆炸;防尘罩;电器;电气外壳;日用电器;电气工程;外壳;防爆装置;爆炸性环境;防火安全性;可燃性环境;易燃材料;作标记;潜在爆炸物;安全性工程;规范(验收);表面温度;测试;t型防护电气设备;TD型防护电气设备
【英文主题词】:Definitions;Design;Dustexplosions;Dustguards;Electricappliances;Electricenclosures;Electricalappliances;Electricalengineering;Enclosures;Explosionprotection;Explosiveatmospheres;Firesafety;Flammableatmospheres;Flammablematerials;Marking;Potentiallyexplosivematerials;Safetyengineering;Specification(approval);Surfacetemperatures;Testing;Typetprotectedelectricalequipment;TypetDprotectedelectricalequipment
【摘要】:ThispartofIEC60079isapplicabletoelectricalequipmentprotectedbyenclosureandsurfacetemperaturelimitationforuseinexplosivedustatmospheres.Itspecifiesrequirementsfordesign,constructionandtestingofelectricalequipment.ThisstandardsupplementsandmodifiesthegeneralrequirementsofIEC60079-0.WherearequirementofthisstandardconflictswitharequirementofIEC60079-0,therequirementofthisstandardshalltakeprecedence.Thisstandarddoesnotapplytodustsofexplosives,whichdonotrequireatmosphericoxygenforcombustion,ortopyrophoricsubstances.Thisstandarddoesnotapplytoelectricalequipmentintendedforuseinundergroundpartsofminesaswellasthosepartsofsurfaceinstallationsofsuchminesendangeredbyfiredampand/orcombustibledust.Thisstandarddoesnottakeaccountofanyriskduetoanemissionofflammableortoxicgasfromthedust.NOTE1Theapplicationofelectricalequipmentinatmospheres,whichmaycontaincombustibledustaswellasexplosivegas,whethersimultaneouslyorseparately,mayrequireadditionalprotectivemeasures.NOTE2Wheretheequipmenthastomeetotherenvironmentalconditions,forexample,protectionagainstingressofwaterandresistancetocorrosion,additionalmethodsofprotectionmaybenecessary.Themethodusedshouldnotadverselyaffecttheintegrityoftheenclosure.
【中国标准分类号】:K35
【国际标准分类号】:29_260_20
【页数】:18P.;A4
【正文语种】:英语