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Model UT804: OPERATING MANUAL
on the component’s anode and place the black test
lead on the component’s cathode. The red test lead
polarity is “+” while the black test lead polarity is “— “.
The SELECT button cycles among resistance, continuity,
and diode.
The measured value shows on the display.
Note
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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.
Connect the test leads to the proper terminals as
said above to avoid error display.
The LCD will display OL indicating either open circuit
or wrong polarity connection.
The unit of diode is volt (V), displaying the positive-
connection voltage-drop value.
Open circuit voltage approximate 2.8V.
When diode testing has been completed, disconnect
the connection between the testing leads and the
circuit under test and remove the test leads away
from the input terminals.
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