UNI-T UTE310 User Manual page 59

User's Manual
The UTE310 digital power meter finds the measurement data by averaging the sampled data over the
measurement interval. The period of the input signal is detected from the voltage signal and current
signal, and the user can set the voltage signal (U) or current signal (I) as the synchronization source.
U (voltage): The period of the voltage signal is preferentially measured and set as the

synchronization source, and the voltage signal becomes the synchronization source for each input
unit; if the period of the voltage signal cannot be measured, the current signal is set as the
synchronization source.
If the measurement object is a switching power supply, the voltage and current waveforms are
shown in the figure, and from the waveforms, it can be seen that the voltage waveform has less
distortion compared to the current signal, so the voltage signal should be set as a synchronous
source at this time.
I (current): The period of the current signal is preferentially measured and set as the

synchronization source, and the current signal becomes the synchronization source for each input
unit, or the voltage signal is set as the synchronization source if the period of the current signal
cannot be measured.
Instruments.uni-trend.com
Voltage waveform
Current waveform
UTE310 Digital Power Meter
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