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3. Press " " key to switch DC voltage, AC voltage, frequencyand duty
ratio, AC voltage mode long press it to turn on or turnoff VFD function.
Attention：
1. Before turning the function rotary switch, leave the measurement probe
from the circuit under measurement.
2. When the screen only displays "OL", it means that the range has been
exceeded and the measurement should be terminated.
3. Do not input voltage with effective value higher than 600V, otherwise there
is a risk of damaging the instrument.
4. Pay special attention to avoid electric shock when measuring high
voltage.
mV gear voltage measurement
1. Insert the red probe into the " " jack and the black probe into the
jack.
2. Turn the knob switch to the " " position, and connect the probe to the
power supply or load to be measured. The polarity and measured value of the
contact terminal of the red probe will be displayed on the screen.
3. Press the key to switch DC voltage, AC voltage and frequency
measurement.
Attention：
1. Before turning the function rotary switch, leave the measurement probe
from the circuit under measurement.
2. When the screen only displays "OL", it means that the range has been
exceeded and the measurement should be terminated.
3. Do not input AC voltage with effective value higher than 600V, otherwise
there is a risk of damaging the instrument.
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