Prokit's Industries MT-1620 - Manual (Page 31)

4.11.5 You can get reading from LCD. The polarity
of red connection will be indicated along
with the voltage value.
NOTE:
 When only the figure ‘OL’ is displayed, it
indicates overrange situation and the higher
range has to be selected.
 When the value scale to be measured is
unknown beforehand, set the range selector at
the highest position.
 “ ” means the maximum current of mA socket is
400mA, the maximum current of 10A socket is
10A, over-current will destroy the fuse.
4.12 AC CURRENT MEASURING
WARNING
Shut down the power of the tested circuit,
then connect the meter with the circuit for
measurement.
4.12.1 Connect the black test lead to the COM jack
and the red test lead to the mA jack for a
maximum of 400mA current. For a
maximum of 10A, move the red lead to the
10A jack.
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