Measurement Of Dc Current; Measurement Of Ac Current - Mastech MS8235 Operation Manual

4.13 Measurement Of DC Current

WARNING
There is the risk of electric shock.
Turn off the power of the circuit under test,
and then connect the meter to the circuit in
series for measurement.
4.13.1 Plug the black probe into the COM jack. When the
current to be measured is below 200mA, plug the
red probe into the uA/mA jack; when the current
to be measured is over 200mA but below 10A,
plug the red probe into the 10A jack.
4.13.2 Set the range selector to the desired
range position.
4.13.3 Press the "FUNC" key to switch to DC
measurement mode, and press the "RANGE" key
to select the auto or manual mode.
4.13.4 Connect the test probes to the circuit under test in
series for measurement.
4.13.5 Take a reading in the main display area of the LCD.
The polarity indication will show the polarity of the
terminal connected by the red probe.
Note:
1) In the manual range mode, if the LCD displays 'O L'
only, it means the measurement has exceeded the
range and a higher range should be selected.
2) In the manual range mode, if the scale of the measured
value is unknown beforehand, the highest range should
be set.
3) " " means the maximum input current of the mA jack
is 200mA and that of the 10A jack is 10A. At the 10A jack,
excess current will blow the fuse.
current
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4.14 Measurement Of AC Current

WARNING
There is the risk of electric shock.
Turn off the power of the circuit under test,
and then connect the meter to the circuit in
series for measurement.
4.14.1 Plug the black probe into the COM jack. When the
current to be measured is below 200mA, plug the
red probe into the uA/mA jack; when the current to
be measured is over 200mA but below 10A, plug
the red probe into the 10A jack.
4.14.2 Set the range selector to the desired current range
position.
4.14.3 Press the "FUNC" key to switch to the DC
measurement mode, and press the "RANGE" key
to select the auto or manual mode.
4.14.4 Connect the test probes to the circuit under test in
series for measurement.
4.14.5 Take a reading in the main display area of the LCD.
Note:
1) In the manual range mode, if the LCD displays 'O L'
only, it means the measurement has exceeded the
range and a higher range should be selected.
2) In the manual range mode, if the scale of the measured
value is unknown beforehand, the highest range
should be set.
3) " " means the maximum input current of the mA jack
is 200mA and that of the 10A jack is 10A. At the 10A jack,
excess current will blow the fuse.
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