Aktakom ACM-2348 Operating Instruction page 10

Resistance and Continuity Measurements
Insert the black test lead into the negative COM terminal
1.
and the
red test lead into the positive terminal.
Set the function switch to the
2.
Use the multifunction MODE button to select resistance.
3.
Touch the test probe tips across the circuit or component
4.
under
test. It is best to disconnect one side of the device under
test so
the rest of the circuit will not interfere with the resistance
reading.
For Resistance tests, read the resistance on the LCD
5.
display.
For Continuity tests, if the resistance is < 100:, a tone
6.
will sound.
Diode Measurements
1. Insert the black test lead banana plug into the negative
COM jack and the red test lead banana plug into the
positive diode jack.
2. Turn the rotary switch to the
3. Press the MODE button until "
display.
4. Touch the test probes to the diode under test. Forward
voltage will indicate 0.4V to 0.7V. Reverse voltage will
indicate "OL". Shorted devices will indicate near 0mV
and an open device will indicate "OL" in both polarities.
Red Black
Probe Probe Probe
Forward test
•))) : position.
•))) position.
" appears in the
Black Red
Probe
Reverse test
9