ISO 4293-1982 锰矿石和锰精矿磷含量的测定萃取钒钼酸盐光度法

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Product Code:SAE J551/15
Title:Vehicle Electromagnetic Immunity--Electrostatic Discharge (ESD)
Issuing Committee:Electromagnetic Compatibility (Emc) Standards
Scope: This SAE Standard specifies the ESD test methods and procedures necessary to evaluate electronic modules intended for vehicle use. It describes test procedures for evaluating electronic modules in complete vehicles.A procedure for verifying the simulator that is used to generate the electrostatic discharges is given in Appendix AFunctional status classifications for immunity to ESD are given in Appendix B.【英文标准名称】:StandardTestMethodforFieldMeasurementofInfiltrationRateUsingDouble-RingInfiltrometerwithSealed-InnerRing
【原文标准名称】:使用有密封内环的双环渗透计现场测量渗透率的标准试验方法
【标准号】:ASTMD5093-2002(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:D18.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:doubleringinfiltration;in-placeinfiltration;soilmoistureinfiltrometer;Clayliners;Double-ringinfiltrometers;Fieldtesting--soil;Fine-grainedsoil;Flowandflowrate--water;Infiltrationrate;Soil;Soil-moistureanalysis
【摘要】:Thistestmethodprovidesameanstomeasurelowinfiltrationratesassociatedwithfine-grained,clayeysoils,andareintherangeof1x00D7;10x2212;7m/sto1x00D7;10x2212;9m/s.Thistestmethodisparticularlyusefulformeasuringliquidflowthroughsoilmoisturebarrierssuchascompactedclaylinerorcoversusedatwastedisposalfacilities,forcanalandreservoirliners,forseepageblankets,andforamendedsoillinerssuchasthoseusedforretentionpondsorstoragetanks.Thepurposeofthesealedinnerringisto:(1)provideameanstomeasuretheactualamountofflowratherthanadropinwaterelevationwhichistheflowmeasurementprocedureusedinTestMethodD3385and(2)toeliminateevaporationlosses.Thepurposeoftheouterringistopromoteone-dimensional,verticalflowbeneaththeinnerring.Theuseoflargediameterringsandlargedepthsofembedmentshelpstoensurethatflowisessentiallyone-dimensional.Thistestmethodprovidesameanstomeasureinfiltrationrateoverarelativelylargeareaofsoil.Testsonlargevolumesofsoilcanbemorerepresentativethantestsonsmallvolumesofsoil.Thedataobtainedfromthistestmethodaremostusefulwhenthesoillayerbeingtestedhasauniformdistributionofporespace,andwhenthedensityanddegreeofsaturationandthehydraulicconductivityofthematerialunderlyingthesoillayerareknown.Changesinwatertemperaturecanintroducesignificanterrorinthevolumechangemeasurements.Temperaturechangeswillcausewatertoflowinoroutoftheinnerringduetoexpansionorcontractionoftheinnerringandthewatercontainedwithintheinnerring.Theproblemoftemperaturechangescanbeminimizedbyinsulatingtherings,byallowingenoughflowtooccursothattheamountofflowresultingfromatemperaturechangeisnotsignificantcomparedtothatduetoinfiltration,orbyconnectinganddisconnectingthebagfromtheinnerringwhenthewaterintheinnerringisatthesametemperature.Ifthesoilbeingtestedwilllaterbesubjectedtoincreasedoverburdenstress,thentheinfiltrationratecanbeexpectedtodecreaseastheoverburdenstressincreases.Laboratoryhydraulicconductivitytestsarerecommendedforstudiesoftheinfluenceoflevelofstressonthehydraulicpropertiesofthesoil.Note18212;Thequalityoftheresultproducedbythisstandarddependsonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesbeingused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting,sampling,inspection,etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfensurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors1.1Thistestmethoddescribesaprocedureformeasuringtheinfiltrationrateofwaterthroughin-placesoilsusingadouble-ringinfiltrometerwithasealedinnerring.1.2Thistestmethodisusefulforsoilswithinfiltrationratesintherangeof1x00D7;10x2212;7m/sto1x00D7;10x2212;10m/s.Wheninfiltrationratesx2265;1x00D7;10x2212;