Continuity Check; Diode Test - Extech Instruments EX430A User Manual

CONTINUITY CHECK

To avoid electric shock, never measure continuity on circuits or wires that have
WARNING:
voltage on them.
1. Set the function switch to the green_.. •>l)
2. Insert the black lead banana plug into the negative
Insert the red test lead banana plug into the positive o jack.
3. Press the SELECT button to indicate•))) 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 1
sound. If the circuit is open, the display

DIODE TEST

1. Set the function switch to the green _.. •>D position.
2. Insert the black test lead banana plug into the negative
plug into the positive
3. Press the SELECT button to indicate _.. 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
Shorted devices will indicate near 0V and an open device will
"OL".
indicate in both polarities.
"OL"
Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176
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indicate "OL".
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