Click on the Excel document attached below named **Calc Res or Temp from ITS90 coeffs**.

## Keep learning

ITS-90 Reference Function Calculator

Realization of ITS-90 from 273.15 K through 1234.93 K:

Calibration and Accuracy of Secondary Standard PRT's to the ITS-90

## See related products

## Speak with Sales

Speak with sales about your calibration equipment needs

Nguyễn Việt PhươngTemperature range from 660.323 to 961.78 need d coefficient but I didn't see it in your excel file?

Elmar BaumhöggerThank you very much for the Excel document! It helped me a lot.

But I found an error:

Constant aa5 value -0.61893395 (H30) is wrong. It must be -0.61899395.

Shane AlldredgeThanks Elmar. Correction made.

Rich GajdowskiHello Shane! Thanks so much for taking the time to put this together. What a timesaver this turned out to be.

Tom HuganaHi Shane,

could you please add a comment to the R=>T conversion including cell B22. Is there any reference to this?

Alex ArellanoHi Shane,

is there a formula could i used to compute ( a4 b4 a7 b7 c7 results of Nominal current Calibration ) I cant find any formula for this equation . i find it in may sensor calibration certificate. hope you can give me idea how can i compute.

thanks,

AlexA

Ciro Alberto SanchezGreat work. ¡¡¡Congrats!!!

Could you check out about the titles:

i. Above Zero Calculator 0.01 °C to 660.323 °C

ii. Below Zero Calculator -189.3442 °C to 0.01 °C

iii. K and not °K

Ciro Alberto SanchezTo Alex Arellano:

You can found useful:

http://download.flukecal.com/pub/literature/3498460B_EN_w.pdf

https://us.flukecal.com/ITS-90-Reference-Function-Calculator

Larry Armfielda(x)= -1.62474200E-02

b(x)= 0.00000000E+00

c7= 0.00000000E+00

a(x)= -1.61388300E-02

b(x)= -1.26969300E-04

Please explain their formulas