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5.5
Harmonics of AC Current in Magnitude (mA or A) or
in Percentage (%)
1) Turn selector switch (3) to "~mA, ~A oder ~V"
2) Select basic frequency via switch(10).
3) Select "Harmonic" or "Harmonic +%" vie key FUNC (6)
Press the
in front of the reading. The number will roll over when the maximum (99) or
minimum (1) is reached
4) at ~mA and A measurement
1) Open the clamp, and close it round the conductor. Make sure that the clamp
properly encircles the conductor, and that there is no air gap between the
jaws. For best measurement results and highest accuracy, have the conduc-
tor placed in center of clamp jaws.
at ~V measurement
1) Plug the black test lead into the "COM" socket and the red lead into the "VΩ"
socket
2) Connect the probes to the UUT and read the display
5.6
Total Harmonic Distortion (% THD-F)
1) Turn selector switch (3) to "~mA, ~A oder ~V"
2) Select basic frequency via switch(10).
3) Select "THD and %" vie key FUNC (6)
4) at ~mA and A measurement
1) Open the clamp, and close it round the conductor. Make sure that the clamp
properly encircles the conductor, and that there is no air gap between the
jaws. For best measurement results and highest accuracy, have the conduc-
tor placed in center of clamp jaws.
at ~V measurement
1) Plug the black test lead into the "COM" socket and the red lead into the "VΩ"
socket
2) Connect the probes to the UUT and read the display
The total harmonic distortion in percentage (THD %) is defined as following:
100
%THD =
or
button to increment or decrement the order of harmonics
+
2
A f
(
)
A f
2
A f
+ +
2
(
)
...
A f
3
( )
1
10
2
(
)
N
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