The “Self-heating effect” Self-heating refers to the thermal energy originating at a current-carrying element. The local temperature rise depends upon the thermal dissipation path(s) away from the element
The self-heating error is usually determined with Equation 4 by calculation of R0(t). The zero current resistance value is calculated by extrapolating, to zero current, resistance values measured with different electrical currents in the sensing element, with the thermometer at a stable temperature.