I would like to estimate the error of temp. measurements.
I am using a K-thermocouple with a +/- 2.2 °C error
The TC-08 datasheet says:
Temperature accuracy: Sum of ±0.2 % of reading and ±0.5 °C
1) is the percentage calculated from the absolute temperature (in K) or from the temperature difference between the thermocouple measurement and the cold junction (ambient temp)?
2) does this value include the thermocouple error? (I doubt it)
I thought to calculate the total error as follows:
for measuring T=300°C in a room at 25°C.
dT=sqrt( (0.2*(300-25)/100 + 0.5)^2 + 2.2^2 ) = +/- 2.4°C
is that correct?