2.12. challenging content

the international temperature scale of 1990 (its-90) established fit curves for taking voltage data to temperature for various standard thermocouple types. these fit curves yield values of temperature from voltage that are within ±0.04 °c for k-type thermocouples. as a result, a device programmed with these fit curves and an extremely accurate cold-junction temperature compensation could result in thermocouple measurements for temperature that are within ±0.04 °c. use these fit curves for plotting the temperature versus voltage for a k-type thermocouple over a temperature range of 0 to 1000 °c.
determine a linear fit curve (slope and intercept) for determining temperatures from voltage over this temperature range.

compare the values from the linear fit to the fit curves by obtaining a scatter plot in excel. plot the difference between the temperatures obtained from your linear fit and the its-90 curve fit on the y-axis. on the x-axis plot the temperature from 0 to 1200 °c. your results should be submitted separately in an excel file.