Using The 50/60 And Wide Selector; B.ac Load Current Measurement - koban KPF-04 Manual Del Usuario

KPF-04
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Set the rotary switch at desired range
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Press the trigger to open the jaw and fully enclose all two wires (single phase,
two wires), three wires(three phases, three wires), or four wires(three phases,
four wires).Make sure the two half jaws are properly closed.
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Read the measured value from the LCD display.
3. Using the 50/60Hz and wide Hz Selector
50/60 Hz Selector
This clamp meter has very good frequency response due to the electric property
of the transformer jaws used. Therefore, the measurement result contains not only
the fundamental frequency of 50/60Hz but also the high frequencies and harmonics
superimposed on the fundamental frequency. To eliminate the effect of high frequency
noise, a low pass filter is designed to filter out high frequency signal. To enable
the filter, set the switch at the 50/60 position. The filter's cut-off frequency is set
at 100Hz with an attenuation characteristic of approx. 24dB/octave.
Wide Hz Selector
If the circuit under test is originated from a high frequency generating device
such as inverter, switching regulators, etc., then the switch should be set at wide
position to measure the signal which contains the frequency from 40Hz-1kHz.
To make sure the presence of high frequency signal, set the switch at 50/60
and wide position to see the difference. If the reading is very different, it is certain
that the high frequency signals or harmonics present.
B. AC Load Current Measurement
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LOAD CURRENT LEAKAGE CURRENT
EN