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3.6 Frequency / THD Measurement
• Move the rotary switch to the Hz position.
• Insert the test leads into the sockets on the front of
the instrument. Connect the red lead to the V
terminal, and the black lead to the COM terminal.
• To measure the frequency of the voltage supply apply
the test leads to the circuit as shown in Fig. 2 and
read the display.
• To measure the frequency of the current, press the
trigger to open the jaws, and clamp them on the
current carrying conductor, as shown in Fig. 3 and
read the display.
• Use the key to change the parameters
displayed.
Screen 1 = Hz, ACRMS
Screen 2 = Hz(F
o
), ACRMS, THD, DF
See Section 4.1 for definitions of the measured
parameters.
• When configured to measure power (Fig. 4) with the
test leads connected and the jaws clamped around a
current carrying conductor, the instrument displays
the frequency of the current source (providing ARMS
> 10A). If ARMS < 10A, a volts frequency
measurement will be made (providing VRMS > 1V),
otherwise ---.- will be displayed.
• Press the HOLD / ZERO button to freeze the display.
• Use the REC key to enter RECORD mode. Use the
key to show the MAX, MIN, AVE displays of
the screen readings. Press the REC key again to exit
this mode.
• Use the key to display the waveform of the
current / voltage and the key to change the
timebase.
Additional features 2060
• Use the key to display the harmonic content
of the current/voltage and the key to select
individual harmonics.
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