User’s Manual Smart Digital Power Meter
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Chapter 4 Measurement
4.1 Average Setting
·Step
1. Press
【
SETUP
】
key to enter SETUP menu
，
press
【
←
】
or
【
→
】
key to select submenu“AVG”as
shown in the following figure
；
2. Press
【
ENTER
】
key to enter the next option, and the press
【
↑
】
or
【
↓
】
key to select OFF, 8, 16,
32 or 64;
3. Press
【
ENTER
】
key to select the current selected option and save it
；
4. Press
【
←
】
or
【
→
】
key to select other submenu, or press
【
SETUP
】
key to exit SETUP menu.
··Explanation
OFF represents the average function is disabled. 8, 16, 32, 64 represents the average function is
enabled and the number of average.
Average
The average method is moving average, it is for power supply or load with great variation or the
numerical value display is unstable, reading is difficult when the frequency of input signal is low.
Executing average measurement function as follows,
(1) U, I, P, S, Q and
λ
(power factor) is calculated by the average value of Urms, Irms, P, S, Q.;
(2) Each measured value of sub-harmonic and distortion factor and total RMS is calculated by the
average value of the measured value of harmonic.
*Notes: S (apparent power), Q (reactive power) is only for the operation, it will not show on the display interface.
Moving Average
According to the following formula, use the specified average number to calculating the moving average.
