Cooling Curve, temperature measurement using PT100 sensor

The resistance of a platinum resistor element changes with temperature. The industry standard PT100 sensor has a resistance of 100 Ohms at zero degree Celsius. The sensor is connected from the 1.1 mA constant current source to ground. The potential across PT100 is measured using A3, with amplification decided by the resistor Rg.


A screenshot of the GUI used for plotting the temperature is shown below.