Model Fitting Control Center: Fit and Constraints
Fit starts (or continues) the fit of the selected EOS to the experimental and predicted property data.
Constraints are pseudo-properties used for calculation of the contributions to the error function of certain deviations from a well-formed EOS (i.e, one that ensures a correct functional shape for the T and p dependent properties.) They are used for fitting multi-parameter EOS that are not well-formed by definition through their mathematical structure