【英文标准名称】:Railwayapplications-Environmentalconditionsforequipment-Part3:Equipmentforsignallingandtelecommunications
【原文标准名称】:铁路应用设施.设备的环境条件.第3部分:信号传输和电信用设备
【标准号】:IEC62498-3Corrigendum1-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-11
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC9
【标准类型】:()
【标准水平】:()
【中文主题词】:空气温度;定义(术语);电气器具;电力牵引;电气工程;电气设备;电气装置;电驱动装置;电磁兼容性;电子装置;环境条件;环境影响;阻止环境(退化);设备;湿度;铁路应用设施;铁路工程;铁道车辆;铁路;额定值;铁路车辆;信号装置;电信设备;电信;车辆;气候条件;抗风化能力;抗风雨;风
【英文主题词】:Airtemperatures;Definitions;Electricappliances;Electrictraction;Electricalengineering;Electricalequipment;Electricalinstallations;Electrically-operateddevices;Electromagneticcompatibility;Electronically-operateddevices;Environmentalconditions;Environmentaleffects;Environmentalresistance;Equipment;Humidity;Railwayapplications;Railwayengineering;Railwayvehicles;Railways;Ratings;Rollingstocks;Signaldevices;Telecommunicationinstallations;Telecommunications;Vehicles;Weathercondition;Weatherresistance;Weatherresistant;Winds
【摘要】:
【中国标准分类号】:S73
【国际标准分类号】:29_280;45_060_01
【页数】:1P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforExaminationofWater-FormedDepositsbyChemicalMicroscopy
【原文标准名称】:用化学显微镜作水沉积物的检验的标准实施规程
【标准号】:ASTMD1245-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【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】:D19.03
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:晶体学;沉积;微量化学;显微术;定性分析;折射指数
【英文主题词】:crystallography;deposits;microchemistry;microscopy;qualitativeanalysis;refractiveindex
【摘要】:Chemicalcompositionofwater-formeddepositsisamajorindicatorofproperorimproperchemicaltreatmentofprocesswater,andisoftenanindicatorofoperationalparametersaswell,forexample,temperaturecontrol.Thispracticeallowsforrapiddeterminationofconstituentspresentinthesedeposits,particularlythoseindicationsofimproperwatertreatment,sincetheyusuallyhaveverydistinctiveandeasilyrecognizedopticalproperties.Thispractice,whereapplicable,eliminatestheneedfordetailedchemicalanalysis,whichistime-consuming,andwhichdoesnotalwaysrevealhowcationsandanionsaremutuallybound.Qualitativeuseofthispracticeshouldbelimitedtothosedepositswhosecontrolisgenerallyknownorpredictable,basedontreatmentandfeedwatermineralcontent,andwhoseconstituentsarecrystalline,orinotherwaysopticallyormorphologicallydistinctive.Ifthesecriteriaarenotmet,othertechniquesofanalysisshouldbeused,suchasPracticeD2332orTestMethodsD3483,orboth.Quantitativeuseofthispracticeshouldbelimitedtoestimatesonly.Formoreprecisequantitativeresults,othermethodsshouldbeused(see5.3).1.1Thispracticedescribesaprocedurefortheexaminationofwater-formeddepositsbymeansofchemicalmicroscopy.Thispracticemaybeusedtocomplementothermethodsofexaminationofwater-formeddepositsasrecommendedinPracticesD2331oritmaybeusedalonewhennootherinstrumentationisavailableorwhenthesamplesizeisverysmall.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:13_060_50
【页数】:7P.;A4
【正文语种】: