8
9
5-5. AC Current (Frequency, Duty Cycle) Measurements
CAUTION:
Do not make 20 A 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 6000 μA 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 600 mA 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 20 A AC, 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 “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.
8
5-6. Resistance Measurements
WARNING:
To avoid electric shock, disconnect power to the unit under test and
discharge all capacitors before taking any resistance measurements. Remove the
batteries and unplug the line cords.
1. Set the function switch to the
Ω CAP
position.
2. Insert the black test lead banana plug into the negative
COM
jack.
Insert the red test lead banana plug into the positive “
Ω
” jack.
3. Press the
MODE
button to indicate “
Ω
” on the display.
4. Touch the test probe tips across the circuit or part under
test. It is best to disconnect one side of the part under test
so the rest of the circuit will not interfere with the resistance
reading.
5. Read the resistance in the display.
Heavy Duty True RMS Digital Multimeter / English
Heavy Duty True RMS Digital Multimeter / English
16/12/2017 Version No. 001
16/12/2017 Version No. 001
Summary of Contents for 161-1626
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