Designation:F1853−11AnAmericanNationalStandardStandardTestMethodforMeasuringSleepingBagPackingVolume1ThisstandardisissuedunderthefixeddesignationF1853;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthequantitativevolumeofasleepingbaginacylinderunderastandardizedload.1.2Thistestmethodusesaphysicalvolumetricmeasure-mentapplicableinthelaboratoryorinthefield.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Theinch-poundunitsgiveninparenthesesareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.Terminology2.1Definitions:2.1.1sleepingbag,n—astructuremadeofdown,syntheticfiberfill,shellfabrics,orothermaterials,orboth,thatisdesignedforpeopletouseforthermalprotectionwhensleeping(forexample,outdoors,tent,cabin).3.SignificanceandUse3.1Thistestmethodcanbeusedtoquantifyandcomparepackingvolumesofsleepingbags.Itdefinesthevolumeoccupiedbyasleepingbagunderastandardizedload(see4.2).4.Apparatus4.1MeasuringCylinder—Acircularlyroundcontainer,measuringindiameter4563cm(1861in.),suitabletocontainthesleepingbagbeingmeasured,andcapableofnotdeformingwhentheloadingsystemisapplied.SeeAnnexA1forspecificationsonatypicaldesign.4.2LoadingSystem—Acircularplateorpistonstructurethatcloselymatchesthediameterofthemeasuringcylinder,withweights,thatprovidesa6.9060.07kPa(1.0060.01psi)load.Thediameteroftheplateorpistonstructureshouldbeslightlyundersized,comparedtothemeasuringcylinder,toallowairtoescapeasthebagundertestissubjecttotheloadingforce.Smallventilationholesarealsoacceptabletoallowairtoescape.SeeAnnexA1forspecificationsonatypicaldesign.4...
