User’s Manual Smart Digital Power Meter
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from the instrument housing as possible.
3.1.3 Turn ON/OFF Power Supply
Turn on
：
Start self-check program when the instrument is enabled, the instrument will enter the measuring
state if the check result is correct.
Turn off
：
The upper/lower limit of current and power will be saved when the power has been turned off.
Notes
：
After turn off the power, wait for 5 seconds to turn on again, otherwise the instrument may abnormally
display.
3.1.4 Power-on Measurement
Firstly, plug in the power socket on the rear panel, and use the specified voltage, the power socket should be
with a ground wire. After checking the wiring is connect rightly, turn on the instrument switch located at the
front panel, and the instrument will enter the measurement state. Apply power to the load and read out the
required measurement value from the display on the front panel of the instrument after the load has been
working stably.
Notes: The instrument should be preheated for 30 minutes before entering the stable state. After cutting off
the instrument power, it should wait for more than 5 seconds before powering it on again. It is strictly
forbidden to switch the power on and off repeatedly within a short period of time, which will cause the
instrument life to shorten and may cause instrument failure. When the measurement is finished, turn off the
instrument power and unplug it to prevent possible damage to the instrument caused by lightning strikes.
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
～
400Hz
