5-4. Measurement of Diode
①
Set the power switch to "ON" position.
②
Connect the plug of red test lead into the “
｜
” terminal and the plug of black
test lead into the “COM” terminal.
③
Set the range selector switch to “
｜
” range.
④
Contact the tips of the test leads to the diode under test.
Fig.4
As shown in Fig.4 (a), when measuring the forward voltage across the diode, a
normal diode will indicate 0.4 to 0.7V and, as shown in Fig.4 (b) the reverse voltage
will indicate a value near 1,500. For a short-circuited diode, a value near 0mV will be
displayed.
△
!
CAUTION
Be sure all voltage is turned OFF in the circuit before making diode test.
6. REPLACEMENT OF BATTERIES AND FUSE
When the battery voltage falls below a specified voltage value, the "B" mark will
appear in the display. If this occurs, replace the two batteries with new ones as
quickly as possible.
Turn the power switch to "OFF", prior
to installing batteries.
To install the batteries, remove the
battery cover located on the unit back.
Loosen the screw on the battery cover.
Replace the two batteries (UM-4 or
type AAA) with new ones, observing
polarity. Use high-quality batteries
which are guaranteed against leakage.
If the instrument is to be left unused
for long periods of time, to prevent
damage from leakage, remove the batteries.
△
!
WARNING
Before changing batteries or fuse, removal all electrical input.
