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PQ3350 V5.2 11/10
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the harmonic analysis of voltage or current, press the HARMO button.
b. Once the HARMO button is pressed, the waveform will be shown in the left-hand portion of the LCD,
and the 1
st
to 50
th
order harmonics will be shown in the right-hand portion of the LCD.
c. The positive and negative peak values will be shown in the waveform (Vpk).
d. The true RMS value & total harmonic distortion of voltage or current is shown under the waveform.
e. The cursor (
↑
arrow) will point to the current order of harmonics. The frequency (HZ) will be displayed
next to the cursor. The percentage of harmonics (%) will be displayed below the cursor. The
magnitude of the harmonics (V or A) or phase angle will be displayed next to the %.
f. Press the SETUP button several times until HAR is highlighted.
g. To move the cursor to the next harmonic, use the
◄
or
►
button.
h. To see the next page (51
st
to 99
th
order) press the
►
button to pass the 50
th
order or press the
◄
button to pass the 1
st
order.
NOTE: If the waveform is clipped at the peak or too small in the LCD, press the RANGE button to
select HIGH or LOW range for a better display. The range indicator is the symbol after the unit of
RMS value, L or H.
Display the Phase Angle of Harmonics
When the HARMO button is pressed the magnitude of each harmonic is displayed. To review the phase
angle of each harmonic, press the PHASE button. The phase angle will be displayed next to the % display
icon. V1 does not trigger at exactly 0 degrees; it may be a few degrees after ‘0’. The remaining signals (V2,
V3, I1, I2, I3) are sampled when V1 is triggered. In other words, the phase angles for V2, V3, I1, I2, and I3
are sampled with respect to V1. For example, if V1, I1 have a phase difference of 30 degrees, they are
displayed as V1 (2 degrees), I1 (32 degrees) in the harmonics analysis.
NOTE: If the waveform is clipped at the peak or too small in the LCD, press the RANGE button to
select HIGH or LOW range for a better display. The range indicator is the symbol after the unit of
RMS value, L or H.
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