1)-

 

A nominally 100-0 RTD (O°C) following Table below is inserted into a bridge like Figure below. R2 is adjusted to account for the initial lead resistances and give a zero-voltage output at O°c. The supply voltage is 2 V. What will be the voltage output at 390°C if  

(a) the lead-wire resistance is neglected?
(b) the lead-wire resistance is 2 O? 

 

table:-

Figure:-

2)The RTD of Problem 1 is inserted into a three-wire bridge like Figure 9.21(b). The initial\nlead resistance is 2 0 and the supply voltage is 2 V. What will the voltage output be at\na temperature of 60°C? What will the output voltage be if the lead-wire resistance is\nassumed to be zero?

TABLE 9.3 Platinum RTD: RVersus T (U.S. Calibration) T (C) R(N) T (C) R(N) T (C) R(N) 139.16 143.01 213.92 217.54 300 59.57 63.68 100 110 -100 -90 310 146.85 221.14 320 330 -80 67.78 120 -70 71.85 130 150.68 224.74 -60 75.91 140 154.49 340 228.32 79.96 83.99 150 350 231.89 158.29 162.08 -50 -40 160 360 235.44 -30 88.01 170 165.86 370 238.99 -20 92.02 180 169.63 380 242.52 96.01 190 173.39 246.05 390 400 -10 100.00 200 177.13 249.56 180.86 184.58 10 103.97 210 20 107.93 220 30 111.87 230 188.29 40 115.81 240 191.99 50 119.73 250 195.67 123.64 260 199.35 70 127.54 270 203.01 80 131.42 280 206.66 90 135.30 290 210.30 *R = 100 N at 0C. R1 R2 Lead A Rjead A Vsupply B Rjead C RTD RA Lead C Lead B Rjead B (h)