METREL MD 9273 - hn - Current harmonics test

MD 9273 Leakage Clamp hn – Current harmonics test
39
U
Harmonics chart.
Urms
Effective voltage value.
THDu [%]
Total harmonic distortion.
THDu [V]
Absolute voltage of higher harmonics.
U:h5 [%]
Relative value of 5
th
harmonic*.
U:h5 [V]
Absolute voltage of 5
th
harmonic*.
*Tap on chart at chosen harmonic to present it value
Appendix G h
n
– Current harmonics test
Harmonics (1 through to 19) are measured and displayed in the chart as an absolute magnitude of the signal
or as a percentage of the signal value at the fundamental frequency (the 1
st
harmonic h1). Absolute
magnitude or percent value display is chosen by parameter setting.
Figure G.14: Harmonics I test menu
Measurement parameters
Type
%
harmonics and distortion are displayed as relative value
A
harmonics and distortion are displayed as absolute value
Connection diagram
Use Current test connection scheme from MD 9273 Manual.
Measurement procedure
 Connect MD 9273 to the item to be tested and set Bluetooth® mode.
 Enter the Harmonics I function and wait for active Bluetooth® communication.
 Set Type parameter for display values of harmonics.
 Set charts Y value range within expected values (optional; could be set later).
 Start the continuous measurement.
 Stop the measurement.