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The measured value is displayed on the screen.
3.13 MEASUREMENT OF THE TOTAL HARMONIC DISTORTION
(THD) AND DISPLAY OF THE ORDERS OF HARMONICS
The device measures the total harmonic distortion with respect to the fundamental
(THDf), the total harmonic distortion with respect to the true RMS value of the
signal (THDr) in voltage and in current, then the level (with respect to the
fundamental), frequency, and RMS value of each order of harmonic.
The frequency of the fundamental is determined by digital filtering and FFT for the
network frequencies of 50, 60, 400, and 800Hz.
3.13.1 Measurement of the THD in voltage
1.
Set the switch to
and press and hold (>2s) the
key. The
THD
f
,
THD
r
and
V RMS
symbols are displayed.
2.
Connect the black lead to the
COM
terminal and the red lead to «
+
»;
3.
Place the test probes or the crocodile clips on the terminals of the
circuit to be measured;
The measurement is displayed on screen.
Summary of Contents for F407
Page 1: ...F407 Clamp multimeter GB User s manual...
Page 50: ...50 Validate by choosing Close...
Page 53: ...53 3 5 Graph mode enlarged zoomed...
Page 74: ...693111A02 Ed 7 09 2016...
