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2.4 Frequency Measurement
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NOTE
CAUTION
For safety reasons, when taking measurements, only
use the L9207-10 Test Lead provided with the
instrument.
SLOW
PEAK
FAST
(The unit
symbol blinks.)
Hz
NORMAL
2.4.2 Frequency Measurement in Voltage Mode
The 10 Hz range or 100 Hz range will display up to
125% of each range, however, only the range from
10% to 100% can be displayed with guaranteed
accuracy.
The frequencies, whose waveforms are special such
as inverters, would not be measurable, when the
carrier frequencies are lower than several kHz.
Full-wave rectification indicates twice the actual
value, due to an AC coupling in the internal circuit.
It would take time to stabilize the counter,
depending on the frequency range or the input
frequency.
1. Press
button and select
AC
or
AC+DC
,
depending on the circuit to be measured.
2. If the voltage range of the measured circuit is
known, set the voltage range to the manual range.
3. Insert the red test lead to
V/
Ω
and the black test
lead to
COM
of the voltage/resistance terminal.
4.
SLOW/PEAK/Hz
button switches the annunciators
as follows. Select Hz by pressing the button. (The
unit symbol
V
blinks, and a voltage value is
displayed on the bar graph.)