SDS5000X Series Digital Oscilloscope User Manual
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IEC 61000-3-2 is an international standard that limits mains voltage distortion
by prescribing the maximum value for harmonic currents from the second
harmonic up to and including the 40th harmonic current. There are 4 different
classes in the EN 61000-3-2 that have different limit values:
Class A: Balanced 3-phase equipment, household appliances excluding
equipment identified as class D, tools, excluding portable tools, dimmers
for incandescent lamps, audio equipment, and all other equipment, except
that stated in one of the following classes.
Class B: Portable tools, arc welding equipment which is not professional
equipment
Class C: Lighting equipment.
Class D: PC, PC monitors, radio, or TV receivers. Input power P ≤ 600 W.
I
Parameter Description
For the first 40 harmonics, the following values are displayed:
Measured Value (RMS)
-- The measured value displayed in the unit specified
by the harmonic unit parameter
Limit Value (RMS)
-- Limits specified by selected standard
Margin (%)
--The margin specified by selected standard parameters. The
margin value is (standard value - measured value) / standard value * 100%
Pass/Fail State
-- Determine whether the measured value is passed or failed
according to selected standard. The rows in the table or the bars in the bar chart
are rendered in different colors based on pass / fail state. When the value is
greater than 85% of the limit but less than 100% of the limit, it is defined as a
critical state.
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