Hey everyone,

I have a question concerning the DIN en 60751 standard.

For a PT100, in the standard there is R0 = 100 ohm
But I can't find anything concerning T0 ' reference temperature', what is it exactly ?

Thanks,

 

It's 0 °C.

 

Thank you !
but then, why do we even have it here ?

 

Because T0 is the reference temperature, and R0 is the RTD's resistance at that temperature. The RTD resistance at any other temperature is given by that formula, as a function of the difference between that temperature and the reference temperature.