waqas_here
Junior Member level 2
PT100 and ATMEGA
Guyz i have been asked to develop a temperature controller using PT100 and ATMEGA8515. So far i have developed a constant current source of 10mA and will read analog voltage using Internal ADC of micro controller. After reading voltage i can have current resistance of PT100 using R=V/I (as I is constant). But on the basis of this resistance how can i predict or calculate the temperature as PT100 doesn't seem to have a linear response. Do i have to implement whole of PT100 chart or is there any other way of doing this. In case i dun have any other option than tell me how to implement that whole chart in ATMEGA.
Thanks in anticipation.
Guyz i have been asked to develop a temperature controller using PT100 and ATMEGA8515. So far i have developed a constant current source of 10mA and will read analog voltage using Internal ADC of micro controller. After reading voltage i can have current resistance of PT100 using R=V/I (as I is constant). But on the basis of this resistance how can i predict or calculate the temperature as PT100 doesn't seem to have a linear response. Do i have to implement whole of PT100 chart or is there any other way of doing this. In case i dun have any other option than tell me how to implement that whole chart in ATMEGA.
Thanks in anticipation.