Omega HHM15, Руководство пользователя, Страница: 13 / 16

11
Diode Tests
1. Connect the red test lead to the "V
W
" jack and the black test lead to the
"COM" jack.
2. Set the Function/Range switch to the " " position.
3. Turn off power to the circuit under test.
4. Touch probes to the diode. A forward-voltage drop is about 0.6V (typical for
a silicon diode).
5. Reverse probes. If the diode is good, display will be between 2.800V and
3.200V. If the diode is shorted, ".000" or another number is displayed.
6. If the diode is open, display will be between 2.800V and 3.200V, in both
directions.
7. If the junction is measured in a circuit and a low reading is obtained with both
lead connections, the junction may be shunted by a resistance of less than
1k
W
. In this case the diode must be disconnected from the circuit for
accurate testing.