HPHP48-E-@,*0 VThermistance =(1/C)*exp(B/T) BC:|concentration BB/T:|sans unit R=l/S=(1/C)*exp(B/T)*l/s R=(l/CS)*exp(B/T)=R41*exp(B/T) lim R = l/CS T | l | ||=L3-1 | S | l/s | [P] (en .m)|l |=.L.L3-1 | | =.L UBPoint de rfrence A T401 connue on connait R(T401)=R40 R401=R41*exp(B/T401) R =R41*exp(B/T) URU =UR41*exp(B/T U) R40 1R4*1exp(B/T401) =exp(B/T-B/T401) |BR=R401*exp(B(1/T-1/T401)B| U U R=R401*exp(B(1/T-1/T401)) Uo T(K)=t(C)+273 BB:|Temprature caractristique 3000K B< BB B< B5000K BApplication: R401=360K 25C B=4520K Calculer R 100C: R=R401*exp(B(1/(t+273)-1/(298)) R=17.1K R411=R401*exp(B(1/T411-1/T401)) R421=R401*exp(B(1/T421-1/T401)) UR411U=UR401*exp(B(1/T411-1/T401)U) R421 R401*exp(B(1/T421-1/T401)) =Uexp(B(1/T411-1/T401)U) exp(B(1/T421-1/T401)) =exp(B(1/T411-1/T421)) ln(R411/R421)=B(1/T1-1/t2) B=Uln(R1/R2) 1/T411-1/T42 =T411T421*Uln(R411/R421U) T421-T41 t411=15C R411=593 t421=40C R421=176 A.N: B=U ln(593/176) 1/(15+273) - 1/(40+273) =4380K BRfrence: R=R401*exp(B(1/(t+273)-1/(t+273)) ln(R)=Uln(R401U)+B/(t+273)-U1/298 | | U U constante ln(R)=Cste + B/(t+273) =Cste + B/T UAllureU: R  +~pp9;@@ @  **<@  @ <@@ @@ +*@<  @  D  DHpH (   8 (0888 +1 M