User’s Manual Smart Digital Power Meter
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Chapter 3 Operating Preparation and Measurement
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3.1 Operating Preparation
3.1.1 Connecting Power Cable
The operating voltage of the instrument is 100V~240V (50/60Hz), please make sure the power supply is within
the rated voltage of this instrument, and make sure the instrument is well grounded.
Warning: Please make sure that the power supply voltage matches the supply voltage before turning on the
power supply, otherwise the instrument will be burned out.
Notes: The instrument should be used under the recommended working conditions. Never use the
instrument in a place where have flammable or explosive materials, it may cause safety injuries.
3.1.2 Connecting Test Circuit
Please follow the following figure to connect the power and load, and make sure voltage and current is within
the measurement range of the instrument.
Warning:
1. The load current flows along the thick wire in the above diagram, so these wires should have a large
enough safe load capacity.
2. The power supply of the load and the power supply of the instrument should be turned off when wiring
at the load end.
Notes:
1
）
When measuring large current/voltage or the current includes high frequency, it should pay attention
to possible mutual interference and noise problems when wiring.
2
）
The lead wire should as short as possible.
3
）
Use heavy gauge wire as can as possible when measuring current.
4
）
To reduce the distributed capacitance to ground, the wire and grounding wire should be as far away
