ASTM_F_2371_-_10e1.pdf

Designation:F2371101Standard Test Method forMeasuring the Heat Removal Rate of Personal CoolingSystems Using a Sweating Heated Manikin1This standard is issued under the fixed designation F2371;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorially corrected 7.4.1 in February 2015.INTRODUCTIONPersonal Cooling Systems(PCS)are used when wearers could be exposed to conditions that renderthe bodys thermoregulatory system inadequate to maintain body core temperature within a safe range.The use of PCS can reduce the possibility of heat stress related physiological disorders and can alsoprovide increased comfort,which in turn could also result in higher productivity.Cooling needs varygreatly depending on the level of activity,the external temperature and humidity,as well as thepersonal protective equipment worn.The PCS should be selected that is best suited for the specificapplication.Sweating heated manikins provide a convenient tool to assess the effectiveness of PCS asthey can provide objective and repeatable results.These instruments can be used to quantify,in areproducible manner,the cooling rate and cooling duration provided by the PCS while eliminating thevariables associated with human physiology.Sweating heated manikins can be used for directcomparisons of PCS.1.Scope1.1 This test method covers the measurement of heat re-moval rate from a sweating heated manikin as well as theduration of cooling provided by a cooling garment,in order toassess the effectiveness of PCS.21.1.1 This test method requires the use of a sweating heatedmanikin.The sweating capability is essential,to take intoaccount the potentially large fraction of heat dissipation asso-ciated with evaporative cooling.1.2 The experimental values obtained for the cooling ratesand cooling duration apply only to the particular PCS andadditional clothing ensemble(standard outer garment,outergarment integrated to the PCS,or any other outer garment,asappropriate)as tested,and for the specified environmentalconditions.1.3 The values stated in this standard shall be SI units.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3F1291 Test Method for Measuring the Thermal Insulation ofClothing Using a Heated ManikinF1494 Terminology Relating to Protective ClothingF2370 Test Method for Measuring the Evaporative Resis-tance of Clothing Using a Sweating Manikin3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 clo,nunit of thermal resistance defined as theinsulation required to keep a resting man(producing heat at therate of 58 W/m2)comfortable in an environment at 21C,airvelocity 0.1 m/s,or roughly the insulation value of typicalindoor clothing.3.1.1.1 DiscussionNumerically,the clo is equal to 0.155Km2/W.1This test method is under the jurisdiction ofASTM Committee F23 on PersonalProtective Clothing and Equipment and is the direct responsibility of SubcommitteeF23.60 on Human Factors.Current edition approved Jan.1,2010.Published January 2010.Originallyapproved in 2005.Last previous edition approved in 2005 as F2371-05.DOI:10.1520/F2371-10E01.2The present standard does not attempt to determine the thermal insulation andevaporative resistance of garments worn with the PCS,or these same properties forthe PCSs themselves.Test Methods F1291 and F2370 are available for thesemeasurements.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.2 clothing ensemble,na group of garments worntogether on the body at the same time.3.1.3 garment,na single item of clothing(for example,shirt).3.1.4 thermal insulation,nthe resistance to dry heat trans-fer by way of conduction,convection,and radiation.3.1.5 total heat loss,nthe amount of heat transferredthrough a clothing system by the combined dry and evaporativeheat exchanges under specified conditions expressed in wattsper square metre.3.2 For definitions of terms related to protective clothingused in this test method,refer to Terminology F1494.4.Significance and Use4.1 This test method can be used to quantify and comparethe cooling provided by different Personal Cooling Systems(PCSs)worn with a standard outer garment or with any otherspecified one.4.1.1 The test method is intended to allow garments based