6 EX540-EN V1.2 7/10
mV VOLTAGE MEASUREMENTS
CAUTION:
Do not measure mV voltages if a motor on the circuit is being switched ON
or OFF. Large voltage surges may occur that can damage the meter.
1.
Set the function switch to the mV position.
2.
Press the
MODE
button to indicate “
DC
”or ““
AC
”, or in AC range press
EXIT
for two seconds and chose ”AC+DC”
3.
Insert the black test lead banana plug into the negative
COM
jack.
Insert the red test lead banana plug into the positive
V
jack.
4.
Touch the black test probe tip to the negative side of the circuit. Touch
the red test probe tip to the positive side of the circuit.
5.
Read the mV voltage in the main display.
6.
With AC mV in the main display, press EXIT for 2 seconds to measure
AC+DC.
DC CURRENT MEASUREMENTS
CAUTION:
Do not make 20A current measurements for longer than 30 seconds.
Exceeding 30 seconds may cause damage to the meter and/or the test leads.
1.
Insert the black test lead banana plug into the negative
COM
jack.
2.
For current measurements up to 4000µA DC, set the function switch to
the
µA
position and insert the red test lead banana plug into the
µA/mA
jack.
3.
For current measurements up to 400mA DC, set the function switch to
the
mA
position and insert the red test lead banana plug into the
µA/mA
jack.
4.
For current measurements up to 20A DC, set the function switch to the
10A/HZ/%
position and insert the red test lead banana plug into the
10A
jack.
5. Press
the
MODE
button to indicate “
DC
” on the display.
6.
Remove power from the circuit under test, then open up the circuit at the
point where you wish to measure current.
7.
Touch the black test probe tip to the negative side of the circuit.
Touch the red test probe tip to the positive side of the circuit.
8.
Apply power to the circuit.
9.
Read the current in the display.
