R-value ASTM F 3340.docx

《R-value ASTM F 3340.docx》由会员分享，可在线阅读，更多相关《R-value ASTM F 3340.docx（1页珍藏版）》请在课桌文档上搜索。

1、ASTMF3340CampingMattressandSleepingBagR-valuetestingStandardASTMF3340StandardTestMethodforThermalResistanceofCampingMattressesUsingaGuardedHotPlateApparatusWhatisR-valueinASTMF3340R-valuezasusedintechnicalterms,isameasurementofthermalresistance;thegreatertheR-value,themorethermallyresistantthemateri

2、alorstructureis.Customerscanusethisfiguretocomparethewarmthofvariouspadswithaclear-cutassessment.Theywillbeabletofindtheidealsleepingpadasaresult.WhyDoestheR-valueofaCampingMattress/SleepingPadMatter?Duetoconductiveheatlossbetweenyourwarmbodyandthecoldground,ifyouweretorolloutyoursleepingbagandlaydo

3、wnontheground,youwouldimmediatelybecomecold.Alayerofinsulationwouldnotformbetweenthetwothankstothecompresseddown.Bychoosingasleepingpadwiththerightamountofinsulation,youcankeepwarmallnightlongandwakeupreadytotacklethepath.Thisprocedureexplainswhyasleepingmatiscrucial.HowtotestR-valueBasedonASTMF3340

4、,thereisasleepingmatsandwichedbetweentwometalplatesinsidethisthermallyenclosedcontainer.Ahotplate(35degreesCelsius)ontop,whichsimulatesthebody,andacoldplate(5degreesCelsius),whichsimulatestheground,aresandwichedbetweenpadsinthistest.Testerstrackhowmuchenergythetopplaterequirestomaintainaconstanttemp

5、eratureof35degreesoverthecourseoffourhours.Themoreinsulativethepad,thelessenergyitrequires.Thelessinsulativethepad,themoreenergyitrequires.AnequationisusedtocalculatetheR-valueforeachpadbasedontheenergyneededtokeepthetemperatureoftheplateconstant.ThegreatertheR-value,thelesspowerisneededtomaintainthetemperatureoftheplate.SATISFYTech&ServiceLLCprovidesthetestingofR-valueASTMF3340zpleasecontactSATISFYforfurtherinformationofR-valueASTMF3340.