UNI-T UT90A Spécifications télécharger pdf (Page 23)

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 open-circuit voltage is around 3V when testing

diode.

l The LCD will display 1 indicating open-circuit for

wrong connection.

l The unit of diode is Volt (V), displaying the positive-

connection voltage-drop value.

l When diode testing has been completed, disconnect

the connection between the testing leads and the

circuit under test.

Measurement Operation(10)

Testing Continuity (see figure 7)

( figure 7)

red black

Model UT90A: OPERATING MANUAL

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UNI-T UT90A Spécifications Page 23