Load the instrument text file. Geometry is entered in mm; uncertainties in ppm.
Measured resistance calibrates R(T). Predicted resistance and the full calibration covariance determine thermal properties and power.
Load data for automatic calibration, or enter coefficients and 1σ uncertainties.
Model: uniform heating across width 2b, with strip-averaged temperature. Diffusivity uses the corresponding logarithmic intercept constant. Recommended frequency limits are geometric estimates, not a verified accuracy guarantee. The fitting method applies to all datasets. Frequency limits are per dataset unless Global is selected. Robust uncertainties use approximate conditional weighted covariance, inflated for excess scatter.
Uncertainties are 1σ. Calibration and voltage-fit errors are assumed independent. Current, temperature, and model systematic uncertainties are not included.