21
Diode Testing
Diode Check:
To ensure a proper functioning diode, the meter will develop a
voltage across the component from a test current. The diode
test function allows measurements of forward voltage drops
across diode and transistor junctions.
1. Turn off power to the device or circuit that is being tested
and discharge all capacitors.
2. Plug the Black test lead into the COM port and the Red test
lead into the V
Ω
port.
3. Set the rotary switch to the position.
4. Press the blue button until is shown on the display
5. Connect the test leads to the diode.
Forward bias:
Good = 0.4 to 0.9V
Bad = 0 or
≥
2.0V
Reverse bias:
Good = OL
Bad = <2.0V
Test current:
1.1mA (typical)
Open circuit voltage:
3.3VDC (max)
Input Protection:
600V rms
ND 2352-1 61-633 630 Series Ins 12/22/04 9:49 AM Page 21
