Harmonic
Measurement Function
Copyright © Itech Electronics Co., Ltd.
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Introduction of harmonic information
Description of harmonic bar chart interface
When the “BAR” button is selected in the harmonic measurement interface,
the bar chart of harmonic measurement results will be displayed. The bar
chart is used for displaying the percentage of different harmonics.
Harmonics can be displayed in the whole sequence, odd sequence and
even sequence. The following is the whole-sequence harmonic bar chart.
Description of interface information:
Total harmonic parameter: including the total harmonic distortion (THD)
factor and total harmonic content. When different measurement functions
are selected, different harmonic parameters will be displayed. When the
soft key corresponding to the “FUNC” parameter is pressed, different
measurement functions can be selected. W/I/U can be selected as the
measurement function in sequence when this key is pressed once.
Parameter meanings of different functions are as follows:
Power (P): total harmonic distortion rate of power and total harmonic
power
Current (I): total harmonic distortion rate of current and total harmonic
current
Voltage (U): total harmonic distortion rate of voltage and total harmonic
voltage
Single-order harmonic parameters: displaying the frequency, harmonic
content, harmonic distortion factor and phase of single-order harmonics.
The user can rotate the knob to select the single-order harmonics to be
displayed. The selected harmonics are displayed in red in the bar chart
form.
Description of harmonic list interface
When the “LIST” button is selected in the harmonic measurement interface,
