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_ � � <br /> :\til�\1 C 518 Standnrd�1 ist Mcthud Ibr titcaJy-tilulc'I�hcmvJ"I'rmsmission Prupertics hy Mcans of thc I lcat Plo�c... <br /> � � ` �. <br /> Thc Somcc i � i •. ,���.iot�..,•�.�bc� i�� 1�rr.i.pq�• <br /> �STM C 518 Slandard Test Method (or Steady-State Tliermal <br /> Vroduct Inlarmatlon lransmissim� Propertics by Means of the Heat Flow Meter Apparatus <br /> Documents tte dchvered <br /> lhrough IHS Standuds Document ASTM C S1A Is offered by IHS as part o(a� purchase InlarmaUon <br /> [aperl. onlinc subseription.This su�setlDtlon rontalns many <br /> Qmck Produc[Tour documents on the same 100��� Use lhls form[o request <br /> Vou may also purchase this tlo[ument alone from Ihe INS Pur[hase Informallon on ASTM <br /> online subscrlp[ions. <br /> When Is a subscrlpUon Standards Store. <br /> beller than a single <br /> docUmCnV ;Jj ASiM Collecbons <br /> tio�,ih��ansr�er... ASTM C 518 Documenl Informetlon: <br /> Finl Name: <br /> Titic <br /> StanOarU Test hlethod for Steady-Slate Thermal <br /> Transmisslon Pmpertles 6y Mcans of lhe Mcal Flow Pteler <br /> �OParatus laat Name: <br /> ASTM inlernalional <br /> Publlcation Date: Emall aedress: <br /> Play 1,2004 <br /> Scope: �-+�i'� <br /> This lesl mcthod mvers lhc measuremenl of sleady slalc <br /> U�crmal transmissinn through Ila[slab specimens using a <br /> hcat flow mcicr aDParatus. <br /> ihe heat flow meter apparaws Is used witlely because¢Is relalWely simple In concept,rapltl,anA <br /> appilcable lo a wlAe range of tesl specimens.The pmcisbn anA hlas of the hea[flow meter <br /> ,pparaWs cun 6e ezcNlent provitled calibntlon Is ca�rled out withln the range of heat ilows <br /> eKpected.This means callbrallon shall�e canmd out w�lh similar types of matetlals,o(slmllar <br /> ❑�ermul conAuctances,al s�milar[hicknesses, mean temperaturos,and lemperoWre gradients,as <br /> expecled br Ihe lesl speclmens. <br /> Thls a mmparalive,or secondary, melhod of mwsumment slnce specimens of known lhermal <br /> Iransmissmn piopertles shull Ue used to calibrate t��e apparaWs.ProOcrUcs of the cvlibratian <br /> specimens n'.usl be Iraceable lo an absolute mea• .ment method.The callbrallon speUmens <br /> should be ohlained fmm a reco9m:ed nallanal s �Jards laboratory. <br /> The hcat Ilow mcicr apPur,Ws eslublishes stcady stale onrdlmenslonal heat fluz through a lest <br /> specimen bctween lwo parallcl plales at wnstanl 6ut different temperatures.Dy appmpriate <br /> callbraUon of Ihe heat flux transducer(s)with callbratlon slandards and hy measuremenl of lhe plale <br /> temperatures and plale sepa�atlon.Fourler's law of heat conducUon Is used lo calculate tl�ermal <br /> mnduclin[y,and lhe�mal resisllvlly or lhermal reslslance and tl�ermal contlucWnce. <br /> This test melhod shall Ue useA in conJunction wM1h PracUce C]0<5.t4any advanres have Ueen made <br /> m lheimal technolo9y, bolh in meawremenl lechnique5 an0 in impmve0 understanding ol lhe <br /> pnnc�ples of heal�low lhrou9h v.atenals.These advances have prompted rev�sions In the mnceptual <br /> anProadres lo the mcasuremci:o(the U�e�mal lransmission properties i1-4).(Footnote 2)All users <br /> of this test method shoiJA be av�arc ol these mncepls. <br /> This tes[melhoA is applica6le lo the measurement of lhermal transmission lhrou9h a wide range ol <br /> speUmen propeiUes and envimnmenlal conAltlons.The method has been used at amblent conAi[ions <br /> ol 1010 40°C wLLh thiUnesses up to approximately 250 mm,and wl[h O���e lemperaWreslrom <br /> -195°C to 540°C a[25�mm lMckness(5,6), <br /> 7hls test method may be used to charactenze muterlal propertles,which may ar may not be <br /> representative of aclual condltions of use.Olher test me[hods,such.is Test Methods C 236 or C 97G <br /> should be used if needetl. <br /> To mcel lhe reQuircments of tl�is lesl method lhe lhermal resislance of Ihe les[specimen shall be <br /> gre,ter than O.lU m��K/W In U�e dlrecl�on o!lhe heal Oaw and edge heat losses�e controlled. <br /> hUpJ�;ice.ihs.conu�documenVubstracUKZF:�1P13AMAAAAAAA �a 7/J/�009 <br />