across the junction. A good silicon junction

drops between 0.5V and 0.8V.

To test a diode out of a circuit, connect the Meter as follows:

1. Insert the red test lead into the VΩmA terminal and the black test lead into the

COM terminal.

2. Set the rotary switch to (The Model: UT33B) or (The Model: UT33C/

UT33D)

3. For forward voltage drop readings on any semiconductor component, place the

red test lead on the component’s anode and place the black test lead on the

component’s cathode.

The measured value shows on the display.

Note

l In a circuit, a good diode should still produce a forward voltage drop reading of

0.5V to 0.8V; however, the reverse voltage drop reading can vary depending on

the resistance of other pathways between the probe tips.

Measurement Operation (11)

Model UT33B/C/D: OPERATING MANUAL

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 41 42

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