R-value ASTM F 3340.docx

ASTMF3340CampingMattressandSleepingBagR-valuetestingStandardASTMF3340StandardTestMethodforThermalResistanceofCampingMattressesUsingaGuardedHotPlateApparatusWhatisR-valueinASTMF3340R-valuezasusedintechnicalterms,isameasurementofthermalresistance;thegreatertheR-value,themorethermallyresistantthematerialorstructureis.Customerscanusethisfiguretocomparethewarmthofvariouspadswithaclear-cutassessment.Theywillbeabletofindtheidealsleepingpadasaresult.WhyDoestheR-valueofaCampingMattress/SleepingPadMatter?Duetoconductiveheatlossbetweenyourwarmbodyandthecoldground,ifyouweretorolloutyoursleepingbagandlaydownontheground,youwouldimmediatelybecomecold.Alayerofinsulationwouldnotformbetweenthetwothankstothecompresseddown.Bychoosingasleepingpadwiththerightamountofinsulation,youcankeepwarmallnightlongandwakeupreadytotacklethepath.Thisprocedureexplainswhyasleepingmatiscrucial.HowtotestR-valueBasedonASTMF3340,thereisasleepingmatsandwichedbetweentwometalplatesinsidethisthermallyenclosedcontainer.Ahotplate(35degreesCelsius)ontop,whichsimulatesthebody,andacoldplate(5degreesCelsius),whichsimulatestheground,aresandwichedbetweenpadsinthistest.Testerstrackhowmuchenergythetopplaterequirestomaintainaconstanttemperatureof35degreesoverthecourseoffourhours.Themoreinsulativethepad,thelessenergyitrequires.Thelessinsulativethepad,themoreenergyitrequires.AnequationisusedtocalculatetheR-valueforeachpadbasedontheenergyneededtokeepthetemperatureoftheplateconstant.ThegreatertheR-value,thelesspowerisneededtomaintainthetemperatureoftheplate.SATISFYTech&ServiceLLCprovidesthetestingofR-valueASTMF3340zpleasecontactSATISFYforfurtherinformationofR-valueASTMF3340.