Continuity Check; Diode Test - Extech Instruments MN47 User Manual

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 Ω
2. Press the MODE button to select continuity •))).
3. Insert the black lead banana plug into the negative COM jack.
4. Insert the red test lead banana plug into the positive jack.
5. Touch the test probe tips to the circuit or wire under test.
6. If the resistance is < 30Ω, a tone will sound.

DIODE TEST

1. Set the function switch to the Ω
2. Insert the black test lead banana plug into the negative COM jack and the red
test lead banana plug into the positive
3. Use the MODE button to view the
4. Touch the test probes to the diode under test. If one reading shows a value
and the other reading shows "OL" the diode is good. Reverse voltage will
indicate "OL". Shorted devices will indicate near 0V and an open device will
indicate "OL" in both polarities.
5. The value indicated in the display is the forward voltage.
position.
position.
jack.
icon on the display.
8
►
MN47-EU-EN-V3.0–12/11