Prokit's Industries MT-1620 - Manual (Page 15)

4V-600V ranges: 600V DC or 600V rms AC.
- Max. Input Voltage: 600V DC or rms AC
NOTE:
At the little voltage range, the meter will show
unsteady reading when test leads haven't reach
the circuit, it's normal because the meter is very
sensitivity. When test leads touch the circuit, you
can get the true reading.
3.2.2 AC Voltage
Range Resolution Accuracy
4V 1mV
40V 10mV
400V 100mV
 （0.8% of rdg + 3digits）
600V 1V  （1.5% of rdg + 5digits）
- Input Impedance: 10M 
- Overload Protection: 400mV range: 250V DC or
rms AC, 4V-700V ranges: 600V DC or 600V
rms AC.
- Max. Input Voltage: 600V DC or rms AC
- Frequency Range: 40 to 400Hz
- Response: Average, calibrated in rms of sine
wave
NOTE:
At the little voltage range, the meter will show
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