Thermocouple Inhomogeneity - Need to calibrate a roll of 50m thermocouple type K

[neoth]

hi all,

recently i need to calibrate a roll of 50m thermocouple type K. so i cut the front and the back and send for calibration.

so if i want to find the inhomogeneity of the thermocouple, is it correct for me to take the front reading - back reading?

for eg.

when i calibrate at 200°C, the front reading is 199.5°C and the back reading is 199.2°C.

so inhomogeneity = 199.5-199.2=0.3

is this method correct?

regards

 

[Charles Wathen]

Re: Thermocouple Inhomogeneity

Here is a PDF on the subject:
http://iopscience.iop.org/0957-0233/20/5/055102/pdf/mst9_5_055102.pdf

 

[statdoug]

Re: Thermocouple Inhomogeneity

Thanks, interesting article.

 

[suffelde]

AMS 2750 has a prescription on how to handle this issue.