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+//CHAPTER 8 _ TEMPERATURE MEASUREMENT

+//Caption : THERMISTOR

+// Example 4 // Page 521

+To= 293     //('Enter the temperature in K=:')

+Ro=1000     //('Entering the corresponding resistance in ohm=:')

+B=3450       // (' Entering the val)ue of constant=:')

+Rt=2500      //(' Entering the resistance at which temperature has to be calculated=:')

+T=1/((1/To)+(1/B)*log(Rt/Ro));

+disp("Temperature is given by:")

+disp("T=1/((1/To)+(1/B)*log(Rt/Ro));")

+printf('The temperature corresponding to resistance of %d ohm is %1.3f K \n ',Rt,T)

+Wrt=5    //('Entering the error in Rt resistance measurement=:' )

+Wro=2    //('Entering the error in Ro temperature measurement=:')

+// Let dT/dRt be represented by DRt and dT/dRo by DRo

+DRt=-T^2/(B*Rt) ;

+DRo=-T^2/(B*Ro);

+disp ("Error in temperature measurement is given by:")

+disp("Wt=sqrt((DRt*Wrt)^2+(DRo*Wro)^2);")

+Wt=sqrt((DRt*Wrt)^2+(DRo*Wro)^2);

+printf('Error in the required temperature measurement is %1.4f K \n',Wt)

+printf('So the required temperature is %d+_%1.4f K \n',T,Wt)

+

+

+