Diode Test - Lutron Electronics CM-9930R Operation Manual

" " position then push the " FUNC. button "
( 3-9, Fig. 1 ) for display show "
when the resistance value is less than 10 ohm, the beeper
4)
sound will be generated.

5-5 Diode Test

1) Connect BLACK test lead into " COM " terminal.
2) Connect RED test lead into "
3) Select the " Function rotary switch " ( 3-4, Fig. 1 ) to the
" " position then push the " FUNC. button "
( 3-9, Fig. 1 ) for display show "
4) When connected with polarity as shown in Fig. 2, a
a.
forward current flow is established and the approx.
Diode Forward Voltage (VF) value in volt will appears
on the display reading. If the diode under test is
defective, " .000 " or near " .000 " value ( short circuit ) or
" 1 " ( open circuit ) will be displayed.
Fig. 2
b. When connected as shown in Fig. 3, a reverse check on
the diode is made. If the diode under test is good, " 1 "
will be displayed. If the diode under test is defective,
" .000 " or other numbers will be displayed. Proper diode
testing should include both steps a. and b. above.
".
" terminal.
".
8
Fig. 3