This is a school assignment and I am trying to use a variable resistor as an RTD because I cannot find an RTD in the list of components. This RTD has to change resistance by 0.04 per degree, and I have no idea how to do that. Can someone please walk me thru this? I am using Mutlisim Version 13 if that matters.
This is the exact language from my lab problem if you need more information:
The RTD will generally operate between 80° to 175°C and has a resistance of 220Ω at 20°C. The fractional change in resistance per 1°C is 0.0040. The dissipation constant is 25mW/°C. Design a circuit to activate an LED alarm when the temperature reaches 150 °C. The error should not exceed +/-1°C. Use a single supply voltage.
