0-1
3
(2)
Differences between circuit tester measurement results
Forward voltage
(V)
The circuit tester has a source voltage, which can vary
between
1.5 V, 3.0 V
and
6.0 V
depending on the
tester.
The tester source voltage affects the resistance
measurements of semiconductors such as diodes.
The characteristics of the diodes as shown to the left.
As can be seen, when using two circuit tester types
with different source voltages, even when the
resistance of the same diodes is measured, the
measurement results are different.
This manual mainly uses the measurement results
obtained using an analog circuit tester with a source
voltage of
3.0 V.
(3)
Differences in measurement results due to measurement ranges
Resistance Meter
0
R
Variable
resistance
Resistance
Voltage: 1.5 V
1"
.
@b
Red
2
Black
When the measurement range in an analog circuit
tester is changed, the internal circuit changes and the
internal resistance changes. As a result, even when the
same diode is measured, the measurement results
vary according to the measurement range.
Therefore, use the measurement range described in
the repair manual when performing measurements.
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