2.2.1.3 Calculating Phase Calibration Factor in the Presence of Large Parasitic Reactive Load

Some applications may require calibration in the presence of a noticeable parasitic reactive load. In those applications, optimal calibration will be obtained if that parasitic load can be temporarily removed. However, if the parasitic load cannot be removed during calibration, then the arctan() approach of Calculating Phase Calibration Factor Using Accumulator Values is not recommended, but rather, it is suggested to set test conditions with a considerable reactive test load (such as using a θ_VI = 60°, PF = 0.5) and use the arccos() approach: