User’s Manual Smart Digital Power Meter
Instruments.uni-trend.com
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2
dc
2
rms
ac
U
U
U
or
2
dc
2
rms
ac
I
I
I
Urms
，
Irms
：
TRMS of voltage ad current
Udc
，
Idc
：
Simple average of voltage ad current
4.4 Average
·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.
The average measurement functions are U, I, P, S, Q and
λ
(power factor) calculated by the average
value of Urms, Irms, P, S, Q.
*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.
