4–102 Resistance Temperature Transducer

A resistive transducer uses a sensing element whose resistance varies with temperature. For a particular transducer, the resistance varies as RTR = 0:375T + 100 Ω, where T is temperature in C. This transducer is to be included in a circuit to measure temperatures in the range from −200C to 800C. The circuit must convert the transducer resistance variation over this temperature range into an output voltage in the range from 0 V to 5 V. Two proposed circuit designs are shown in Figure P4–102.
Which of these circuits would you recommend for production and why? (Hint: First verify that the circuits perform the required function.) Use Multisim to verify your results

Transcribed Image Text:

100 VTR w 5V RTR 2.5 V ww 900 600 + 5V Circuit 1 RTR VTR 600 2 - 100 ww 2.5 V + Circuit 2 FIGURE P4-102 ww 1 Vo Vo