reedinstruments
www
com
13
Resistance Measurement
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 green
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
Continuity Check
WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the green
Ω CAP
position
2. Insert the black 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
and Ω on the display
4. Touch the test probe tips to the circuit or wire you wish to check
5. If the resistance is less than approximately 35Ω, the audible signal will
sound. If the circuit is open, the display will indicate “OL”
Diode Test
1. Set the function switch to the green
Ω CAP
position
2. Insert the black test lead banana plug into the negative COM jack and
the red test lead banana plug into the positive V jack
3. Press the MODE button to indicate
and
V
on the display
4. Touch the test probes to the diode under test. Forward voltage will
typically indicate 0.400 to 0.700V. Reverse voltage will indicate “OL”.
Shorted devices will indicate near 0V and an open device will indicate
OL in both polarities
continued ...
