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80 Series III
Users Manual
Measuring AC or DC Current
WWarning
Never attempt an
Caution
To avoid possible damage to the meter or to the equipment under test, check the meter’s fuses before measuring current. Use the proper terminals, function, and range for your measurement. Never place the probes across (in parallel with) any circuit or component when the leads are plugged into the current terminals.
Current is the flow of electrons through a conductor. To measure current, you must break the circuit under test, then place the meter in series with the circuit.
The meter’s current ranges are 400 μA, 4000 μA, 40 mA, 400 mA, 4000 mA, and 10 A. AC current is displayed as an rms value.
To measure current, refer to Figure 7 and proceed as follows:
1.Turn off power to the circuit. Discharge all high- voltage capacitors.
2.Insert the black lead into the COM terminal. For
currents between 4 mA and 400 mA, insert the red lead into the mA/μA terminal. For currents above 400 mA, insert the red lead into the A terminal.
Note
To avoid blowing the meter’s 400 mA fuse, use the mA/μA terminal only if you are sure the current is less than 400 mA.
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