11
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 yellow
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 yellow
mA
position and insert the
red test lead banana plug into the
µA/mA
jack.
4. For current measurements up to 20A
AC, set the function switch to the yellow
10A/HZ/%
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. In the 10AAC range, right
auxiliary display frequency.
10. Press and hold the
MODE
button to indicate “
Hz
”.
11. Read the frequency in the display.
12. Momentarily press the
MODE
button again to indicate “
%
”.
13. Read the % duty cycle in the display.
