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SIGLENT
178 SDS2000X User Manual
13. Press the Standard softkey, and then turn the universal knob to select the desired
standard to perform compliance testing on the current harmonics.
IEC 6100-3-2 Class A – for balanced three- phase equipment, household
appliances (except equipment identified as Class D), tools excluding portable
tools, dimmers for incandescent lamps, and audio equipment.
IEC 6100-3-2 Class B – for portable tools.
IEC 6100-3-2 Class C (no support) – for lighting equipment.
IEC 6100-3-2 Class D – for equipment having a specified power according less
than or equal to 600W, of the following types: personal computers and personal
computer monitors, television receivers.
14. Return to the ANALYSIS function menu.
15. Press the Apply softkey to perform the harmonics analysis. When the analysis has
completed, results are displayed.
Figure 107: Harmonics Analysis
FFT waveform
Shows the frequency components in the input current. The FFT is
calculated using the Hanning window.
Harmonic,
Value (RMS),
Limit(RMS),
Margin,
Status
For the first 40 harmonics, these values are displayed:
Value (RMS): the measured value in the units specified by the
Harmonics Unit parameter.
Limit (RMS): the limit specified by the selected Current
Harmonics Standard.
Margin: the margin between the measured value and the limit.
Status: Non Spec, Pass, Fail
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