# Calculating tau from measured time and temperature

by blairj
Tags: measured, temperature, time
 P: 1,345 What are you trying to fit? A function of the form $$f(t) = T_f(1 - exp(\frac{-t}{\tau}))$$ Your best bet it to evaluate it numerically, don't think it can be analytically solved... I get tau = -327.156 and Tf = -76.3792