Sanwa CD731A, Instruction Manual

Page: 40 / 56

− 36 −
③ Select the select switch at " ".
④ Apply the black test pin to the cathode of the diode and the red
test pin to the anode.
⑤
Make sure that the display shows a diode forward voltage drop.
⑥
Replace the red and black test pins, make sure that the display
is the same as that when the test leads are released.
⑦
After measurement, release the red and black test pins from the
object measured.
⑧ Turn the function switch to the position of OFF.
Judgement
When the items
⑤
and
⑥
are normal, the diode is good.
●
The input terminals release voltage is about 1.1
〜
1.5 V.
● If the diode forward voltage exceeds the release voltage, O.L is
displayed even in a test in the forward direction.
⑥
After measurement, release the red and black test pins from the
object measured.
⑦ Turn the function switch to the position of OFF.
● The buzzer sounds when the resistance in a circuit to measure is
less than about 10
〜 120 1 .
●
Even if the buzzer does not sound, a resistance value up to 10
〜
120
1
will be displayed.
5-5 Checking Continuity ( )
Never apply voltage to the input terminals.
WARNING
⑤
The continuity can be judged by whether the buzzer sounds or not.
1) Application
Checking the continuity of wiring and selecting wires.
2) Measurement procedure (See Fig 9, page 12)
①
Connect the black plug of the test lead to the COM
−
input
terminal and the red plug to the ＋ input terminal.
② Set the function switch at " 1 / / " function.
③ Select the select switch at " " .
④
Apply the red and black test pins to a circuit or conductor to measure.