VEVOR EM4659 - Frequency and Duty Cycle Specifications

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Frequency
Range Resolu tion Accuracy Remark
9.999Hz 0.001Hz
± ( 1.0% + 5) Autorange
99.99Hz 0.01Hz
999.9Hz 0.1Hz
9 999kHz 0 001kHz
99.99kHz 0.01kHz
999.9kHz 0. 1kHz
9.999MHz 0.001MHz not specified
For frequency measurements with the rotary switch in the"H%" position, the
amplitude of the input signal is required tobe in the range of 2V rms to 20V rms.
When the meter is measuring ac voltage and frequency at thesame time with
the rotary switch in the " " position, thefrequency measurement range is
10Hz to 1kHz and theinput voltage for frequency measurements is required
to be >2V(the higher the frequency of input signal, the higher therequired
input voltage ).
For frequency measurements with the rotary switch in the "VFD " position,
the measuring range is 10Hz to 1kHz,andthe input voltage is required to be
> 1/3 of the present voltagerange(the higher the frequency of input signal,
the higher therequired input voltage ).
When the meter is measuring VFD current and the freguency ofthe current
at the same time, the frequency measurement rangeis 10Hz to 1kHz, and the
amplitude of the current for frequency measurement is required to be > 1/3
of the present currentrange(the higher the frequency of input signal, the
higher therequired current to be tested ).
Duty Cycle
Range Resolution Accuracy
5% ~ 95% 0. 1%
± (2% + 7)
Input Voltage: 2V rms - 20V rms
Frequency Range: 4Hz ~ 1kHz