UNI-T UT804 Operating Manual page 41

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 measured value shows on the display.
The SELECT button cycles among resistance, continuity,
and diode.
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.
l
Connect the test leads to the proper terminals as
said above to avoid error display.
l
The LCD will display OL indicating either open circuit
or wrong polarity connection.
l
The unit of diode is volt (V), displaying the positive-
connection voltage-drop value.
l
Open circuit voltage approximate 2.8V.
l
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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