The WT1800 and WT5000 appear to have power compensation ON (by default) with no user-congiruable options (no option to turn it off).
Optimize efficiency and ensure compliance with industry-leading power measurement. Yokogawa analyzers deliver unmatched accuracy in watts, power factor, harmonics, and efficiency, so you can design greener systems and validate performance with confidence.
The WT1800 Power Analyzer offers maximum flexibility with up to six wattmeter elements, high bandwidths, simultaneous high speed digitizing, and wide voltage and current ranges. Although this model is still available, the newer WT1800E offers higher accuracy.