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NI 9213 thermocouple measurement error

Hi everyone,

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.

Is it possible to reduce this error?

NI 9213

See the first plot on page 10




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