Suppose that the unknown resistance Ru in Fig. 6.2 is a resistance thermometer whose resistance at 100C is 600 U and whose resistance varies with temperature at the rate of þ0.4 U/ C for small...

Suppose that the unknown resistance Ru in Fig. 6.2 is a resistance thermometer

whose resistance at 100C is 600 U and whose resistance varies with temperature at

the rate of þ0.4 U/

C for small temperature changes around 100C. Calculate the

sensitivity of the total measurement system for small changes in temperature around

100C, given the following resistance and voltage values:

R1 ¼ 600 U ; R2 ¼ R3 ¼ 6000 U ; Vi ¼ 20V

Assume that the ambient temperature around the bridge circuit was the same as that

at which the voltage measuring instrument and all bridge component values were

calibrated.