Amprobe ACD-45PQ Power-Quality-Clamp - Manual (Page 15)

9
Note:
1. Under proper measurement setups for load circuits, the W (real power)
readings are always positive. Negative W readings indicate reversed
clamp-on jaws direction or test leads polarities, or even incorrect voltage
lines are being measured as in 3-phase measurement setups. Correct
them for proper “A-lags-V” indications.
2. When encountering largely distorted waveforms, “A-lags-V” detection
might be affected due to the influence of harmonics. It is recommended
to manage (e.g. filter out) harmonics problems before measuring/
dealing with phase-shift problems.
kWHr (kilo-Watt-Hour) Recording function