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1、WORLDWIDETestMethodENGINEERINGGMW3235MaterialsSTANDARDSFoggingCharacteristicsofTrimMaterialschamberintheunitisrequiredwithatypical1Scopetemperaturerangefrom+20to+40°C.TheheatingunitandthecoolingsystemmustbeabletoThetestmethoddefinedinthisdocumentismaintainthet
2、emperaturewithin±0.5°C.designedtoevaluatethe"fogging"tendenciesofallinteriorandairventilationsystemmaterials.TheAtemperatureoverridecut-offtopreventresultingratingsinfluencedbythevolatileorganicoverheatingintheeventofthermostatfailureconstituents,liberatedunde
3、rconditionsofhighshouldbeanintegralpartoftheunit.ambienttemperaturesandsubsequentlydepositedTemperaturesoftheheatingunitandthecoolingoncoolersurfaces,aredetermined.systemmaybemonitoredduringthetest.TwoalternativetestmethodsarespecifiedwithAfterplacingthebeaker
4、sinthechambers,thedifferentmethodsofevaluatingthedegreeoftemperatureshallnotdropbymorethan5°Candfogging.Testresultsobtainedbythesetestthetesttemperaturemustbereachedwithinmethodsarenotdirectlycomparableandonlythat20minutes.testmethodspecifiedbytheappropriateco
5、dingin3.1.1Forequipmentthatusesaheattran--`,,``,``,,```,,,,,,,`,,,`,,,`-`-`,,`,,`,`,,`---sferthematerialspecification,engineeringdrawingliquid,theheatingliquidshouldbetemperatureetc.,shallbeused.resistantandpreferablywatersoluble,e.g.,basedMethodA-PhotometricM
6、ethod:Thismethodonpolyethylene-orpolyproylene-glycol.evaluatesthevolatilityoforganicconstituentsby3.2Storagechamber,dustfree,withdryingagentreflectivitymeasurements(CodingA).(e.g.silica);suitableisadesiccator.MethodB-GravimetricMethod:Thismethod3.3Apparatusfor
7、conditioningtotheappropriatedeterminesthemassoffoggingcondensateonrequirementsasdescribedinGMW3221,unlessAluminumfoilbymeansweighingoffoilbeforeandotherwisespecifiedintherelevantmaterialsafterthefoggingtest(CodingB).specification.Note:Nothinginthespecification
8、supersedes3.4Suitablestampingdevice,punchorequivalentapplicablelawsandregulationsunlessspecificforpreparationoftestspecimens.exemptionhasbeenobtained.3.5Beakerswithflatbottomsmadeo
