GE Power Quality Meter Series Instruction Manual page 160

6.6 POWER ANALYSIS
PQMPC can perform a harmonic analysis on any of the four current inputs or any of the three voltage inputs by
placing the PQM in a high speed sampling mode (256 samples/cycle) where it will sample one cycle of the user
defined parameter. PQMPC then takes this data and performs a FFT (Fast Fourier Transform) to extract the
harmonic information. The harmonic analysis feature is implemented into PQMPC as shown below.
1. Select the Actual > Power Analysis > Harmonic Analysis menu item, then select the desired output type:
Waveform or Spectrum format.
2. Selecting Spectrum PQMPC displays Harmonic Analysis Spectrum window including the harmonic spec-
trum up to and including the 62nd harmonic. Select the trigger parameter from the Select Trigger box and
press Trigger to display the harmonic spectrum.
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The window includes details of the currently selected harmonic and other harmonic analysis related data
(for example, THD, K Factor, etc.).
Select Read Last Trigger From Device to load previous acquired spectra from the PQM.
Open loads and views previously save spectra, Save saves the captured spectrum to a file, and Print prints
the currently displayed spectrum.
6-14 PQM Power Quality Meter
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GE Power Management