ASTM D6782-2005 直列式干木湿度计的标准化和校准的标准试验方法

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【英文标准名称】:StandardTestMethodsforStandardizationandCalibrationofIn-LineDryLumberMoistureMeters
【原文标准名称】:直列式干木湿度计的标准化和校准的标准试验方法
【标准号】:ASTMD6782-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:D07.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:校正;木材;仪表;潮气;试验方法;木
【英文主题词】:in-linemoisturemeter;moisturecontent;moisturemeters;wood
【摘要】:In-linemetersprovidearapidmeansofdetectingmoisturecontentoflumberorwoodproductsinprocessing(thatis,onacontinuousproductionline).Twomajorusesaremonitoringtheperformanceofthedryingprocess(airdrying,kilndrying),andprovidingsortingoridentificationofmaterialatpredeterminedlevelsofmoisturecontent.Thesemeasurementsareinferentialinthesensethatphysicalmeasurementsaremadeandcomparedagainstcalibrationcurvestoobtainanindirectmeasureofmoisturecontent.Thesemeasurementsmaybeinfluencedbyoneormorephysicalpropertiessuchasactualmoisturecontent(averageandgradient;seeAppendixX5),density,surfacemoisture,chemicalcomposition,size,andtemperatureofwood.Inaddition,themeasurementsmayalsobeinfluencedbyenvironmentalconditionsandthedesignspecificationsofthemeter.Thebestperformanceisobtainedbyanawarenessoftheeffectofeachparameteronthemeteroutputandcorrectionofreadingsasspecifiedbythesetestmethods.Thetwomajoranticipatedusersofthesetestmethodsareinstrumentmanufacturerswhoseprimaryconcernislaboratorystandardizationandcalibration,andinstrumentownerswhomayhaveaprimaryfocusonfieldstandardizationandcalibration.Thesetestmethodspresentthelaboratoryandthefieldasseparatetracks(seeAppendixX2).4.2.1LaboratoryStandardizationandCalibration8212;Thisportionofthesetestmethodsisintendedforguidanceofequipmentmanufacturers.Specifictestrecommendationsaretailoredtothecapabilitiesofalaboratoryenvironment.4.2.2FieldStandardizationandCalibration8212;Thepredominantuseofin-linemetersisinproductioninwhichlumbercharacteristicsandenvironmentalconditionsreflectactualmillprocesses.Fieldstandardizationandcalibrationisessentialtoaddressorencompassmuchofthevariabilityinproduction.4.2.3Applicationsusingtheoutputofthein-linemoisturemetermaymodifythemeteroutputsignalsorhaveinherentresponsecharacteristicsthatarenotrepresentativeofthemeter.1.1Thesetestmethodsapplytoinstrumentsdesignedtodetect,ormeasure,moistureinwoodwhichhasbeendriedbelowthefibersaturationpoint.Thepurposeofthesetestsistoprovideaunifiedstandardagainstwhichsuchsystemscandemonstratetheirsuitabilityfortheirintendeduse(seeAppendixX1).1.2Thestandardisconfiguredtosupporttestsbymoisturemetermanufacturersaswellasend-usersofsuchsystems,thereforethetextfollowstwotracks(seeAppendixX2).1.3Testmethodsspecifiedformanufacturersaregenerallydesignedforlaboratorysettingsandareintendedtoprovideastandardagainstwhichamanufacturercertifiescalibrationandgeneralsystemconformance.1.4Testmethodsforend-usersaregenerallydesignedforfieldsettingsandareintendedasastandardizedsetofproceduresfordeterminingthesuitabilityofaspecificmachineforaparticularuse.1.5Applicationssuchaslumbermarkingorsortingsystemsutilizingtheoutputofthein-linemeterarenotpartofthisstandard.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N95
【国际标准分类号】:79_040
【页数】:22P.;A4
【正文语种】: