Current Measurement - Mastech MS8221 User Manual

4.2 Current measurement

- Set the rotary switch to the desired A
- Connect the black test lead to the COM terminal and
the red test leads to the mA terminal for a maximum of
200mA. For a maximum of 10A, move the red test
lead to the 10A terminal.
- Connect test leads in series with the load in which the
current is to be measured.
- Read the displayed value. The polarity of red test lead
connection will be indicated when making a DCA
measurement.
- When only the figure "1" displayed, it indicates
overrange situation and the higher range has to be
selected.
* MS8221B/MS8230B don't have ACA measurement
function.
To avoid damage to the meter, use the proper
terminals, function, and range for your
measurement.
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 socket of INPUT maximum current is
200mA, over current will destroy the fuse. 10A's
or A~ range.
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