06-26-2016 12:03 PM - edited 06-26-2016 12:05 PM
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.
06-27-2016 11:44 AM
Hello!
I've found the following information that might be useful for you, it is the simulation of an RTD, check it and let me know if helps:
http://digital.ni.com/public.nsf/allkb/BCACAEEBDA7F70C9862571D3004EA5B0
http://digital.ni.com/public.nsf/allkb/6B56D525AB21781F862571D3004E5F0A
http://digital.ni.com/public.nsf/allkb/3B8920EA67EA8531862571CA002E6FEF
Luis G.