Measuring Frequency - SEFRAM 7352B User Manual

Measuring Frequency

The meter measures the frequency of a voltage or current
signal by counting the number of times the signal crosses a
threshold level each second.
This function only can be operated in AC voltage and current
measurements. The ranges of measuring frequency are 400Hz,
4kHz, 40kHz and 100kHz.
If a reading shows as 0 Hz or is unstable, the input signal may
be below or near the trigger level. The detail of frequency trigger
level refer to the electrical specifications.
To use the frequency function, press function (yellow) button to
select measurement function.
Make High Frequency Rejection Measurement
 WARNING

Do not use the High Frequency Rejection (Low Pass Filter)
option to verify the presence of hazardous voltages. Voltages
greater than what is indicated may be present. First, make a
voltage measurement without the filter to detect the possible
presence of hazardous voltage. Then select the filter function.
The High Frequency Rejection mode equip a low pass filter in
the AC measurements. The cut-off frequency (-3dB point) of
low pass filter is 800Hz.
To use the HFR mode, press the HFR button to equip a low
pass filter in the AC measurements.
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