I am working on the development of an experimental setup for the cooling of a metal plate using liquid nitrogen (-196c). I am doing transient temperature measurements using an E-type thermocouple and NI9213.
As per the NI9213 manual, measurement error increases sharply as it gets close to (-200c). At room temperature error is around 1 c but increases to 5 c. 'c' is degree celsius. Adding thermocouple calibration error and random error increases the total error significantly.