14
AC CURRENT (FREQUENCY, DUTY CYCLE)
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
AC, 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
AC, 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 10A AC,
set the function switch to the
10A
position
and insert the red test lead banana plug
into the
10A
jack.
5. Press the
MODE
button to indicate “
AC
”
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 neutral side of the
circuit.
Touch the red test probe tip to the “hot” side of the circuit.
8. Apply power to the circuit.
9. Read the current in the display.
10. Press the
Hz/%
button to indicate “
Hz
”.
11. Read the frequency in the display.
12. Press the
Hz/%
button again to indicate “
%
”.
13. Read the % duty cycle in the display.
14. Press the
Hz/%
button to return to current measurement.