Consider the pressure measurement system shown in Figure 3.22. The Wheatstone bridge of the pressure transducer is initially balanced at p = p _atm . Determine (a) the value of R _x (in ohms) required to achieve this balanced condition. Note that R _s (?) = 100 [1 + 0.2 (p ? p _atm )], with p in kPa.

Tubing Pilot | Pressure Static I Sensor I Tube R = 250 +E R = 100 R = 500 Pressure Transducer (Wheatstone Bridge) Amplifier Filter A/D Board Computer