Total Harmonic Distortion (Thd) Measurement And Harmonics Order Display; Thd (V) Measurement - AEMC 607 User Manual

4.13 TOTAL HARMONIC DISTORTION (THD)
MEASUREMENT AND HARMONICS ORDER DISPLAY
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 800) Hz.

4.13.1 THD (V) Measurement

1. Set the switch to
button. The THDf, THDr and V RMS symbols are displayed.
2. Connect the black lead to the COM terminal and the red lead to
+
the terminal.
3. Place the test probes or the alligator clips on the terminals of the circuit
to be measured.
The measured value is displayed on the screen
44
and press and hold (> 2 sec) the
Clamp-On Meter Model 607 - User Manual