Notes for actual measurement:
Since the inverter output is in the tens to hundreds of kHz range, the power factor error effect of the WT2000 (or 2532) cannot be ignored. In an actual measurement of a 100kHz input signal, phase delay of the WT2000 current side is estimated at approximately 6°and that of the 2532 is approximately 3 °.
Generally, since the power factor in an fluorescent light inverter measurement is close to 1, the power factor error effect is not so big compared to the amplitude error effect. (When PF=1 @ 6°phase delay the effect is cos(6 °) = - 0.5%, when @ 3 °delay the effect is cos(3°) = - 0.14%. On the other hand, the amplitude error is estimated at 2 to 5%)
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