4. Turn on power to the circuit being measured. If the pointer is
deflected to the left of zero, the polarity is opposite to that
which was anticipated. Please change polarity at the test
leads.
5.5. Measuring AC Current
Caution!
Never connect the test leads directly across any source of
voltage when the instrument is used for current measurements.
This will damage the instrument.
1. Connect the black test lead in the COM jack and the red test
lead in the mA/
jack for measurement up to 500 mA. For
measurement from 500 mA up to 10 A please connect to the
10A jack.
2. Set the range switch at appropriate range of AC current.
3. With the circuit power turned off, open the circuit at the point
where current is to be measured. Connect the instrument in
series with the circuit.
4. Turn on power to the circuit being measured.
5. Read the AC current on the arc.
5.6. Continuity test
1. Connect the black test lead to the COM jack and the red test
lead to the mA/
jack.
2. Turn the rotary switch to the position.
3. Insert the test leads to the system under test.
4. When the resistance of the measurement object is less than
about 50
Ω, an acoustic signal is heard.
Note:
Never measure continuity on a live wire and discharge all
capacitors in a circuit before making any continuity test.
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