User’s Manual Smart Digital Power Meter
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3.2 Measurement Display
3.2.1 Window Display
has four display windows, it can display different measurement value at the same time, as shown
in the following table.
No.
Window Display
Name
Measurement Range
1
V
Voltage (volt
）
U: 3.0V
～
600V
2
A
Current
（
Ampere/milliampere
）
I: 0.0005A
～
20A
3
W
Active power
（
Watt
）
P: 0.001W
～
12kW
4
PF
Power factor
PF: -1.000~1.000
Hz
Frequency
（
Hertz
）
Hz: 40Hz
～
70Hz
The four window display as shown in the following figure.
3.2.2 Alarm for Over Range
These situations will be regarded as over range.
1. The measured value of voltage and current exceeds 120% of the rated range;
2. The peak value of voltage and current exceeds 170% of the rated range
；
“--OL-”will be appear when the range is exceeded.
3.2.3 Alarm for the Lower Measured Value
The alarm will be appear if the measured value of voltage is less than 3V or the measured value of current is
less than rated value 0.1%.
1. Voltage, current, power displays “0”.
2. Power factor displays “-----”.
3.2.3 Alarm for Break Off
When switch measurement range and function, “-----”will be appear for a while.
