Prokit's Industries MT-1620 - Manual (Page 29)

 When the value scale to be measured is
unknown beforehand, set the range selector at
the highest position.
4.10 AC VOLTAGE MEASURING
WARNING
You can’t input the voltage which more than
600V rms AC, it’s possible to show higher
voltage, but it’s may destroy the inner circuit.
Pay attention not to get an electric shock when
measuring high voltage.
4.10.1 Connect the black test lead to the COM jack
and the red test lead to the V jack.
4.10.2 Set the transform switch at the V range
position.
4.10.3 Put down the "FUNC." to enter the AC
measurement. Auto range or manual range
can be transformed by putting the
“RANGE”.
4.10.4 Connect test leads across the source or
load under measurement.
4.10.5 You can get reading from LCD.
NOTE:
 When only the figure ‘OL’ is displayed, it
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