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RESOURCES > EIS > FITTING CIRCUITS
All curve-fitting software should report some measure of the "goodness of fit." Often this is the chi-squared parameter ( X2 ) or a value related to it. Boukamp makes the recommendation that the value of X2 should decrease by tenfold if a new circuit element is introduced into the circuit model. The tenfold decrease provides the justification for including the new circuit element. If the inclusion of an additional circuit element does not substantially improve the goodness-of-fit (as evidenced by the decrease in the X2 value), then based on Occam's Razor, you should keep the simpler model, or continue your search for an improved one.
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Electrochemistry The Bookstore Tell Us ! |
One guideline that I have heard
recommended (although I can not give a reference for it) is that data over a frequency
range of about a decade is required to support each circuit component.
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