Mastech MS8221C - Electrical Measurement Capabilities

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4.11 Measuring DC Current
Shut down the power of the tested circuit, then
connect the meter with the circuit for
measurement.
WARNING
4.11.1 Connect the black test lead to the COM jack and
the red test lead to the INPUT jack for a
maximum of 200mA current. For a maximum of
10A, move the red lead to the 10A jack.
4.11.2 Set the transform switch at the desired µA, mA
or A range position.
4.11.3 Put down the 'FUNC.' to enter the DC
measurement. Auto range or manual range can
be transformed by putting the 'RANGE'.
4.11.4 Connect test leads in series with the load under
measurement.
4.11.5 You can get reading from LCD. The polarity of
red test lead will be indicated.