
6-8-1 I
CEO
Measurement
1) Application
Measuring Iceo of transistor
2) Measuring range: h
FE
range
3) Measurement procedure
①
Connect the black plug of the test lead to the
−
input terminal
and the red plug to the
+
input terminal.
②
Set the function/range selector to h
FE
function.
③
Set the polarity reversal switch to either NPN or PNP
position according to the transistor (hereinafter simply called
“
TR.
”
) to be measured. (NPN-TR: NPN position PNP-TR:
PNP position)
④
Short the test pins and turn the 0
Ω
・
C
∞
adjuster to have
the pointer align exactly with 0 line of
Ω
scale.
⑤
Connect the emitter of TR and the collector of TR to each
measuring terminal (pin of test lead).
⑥
Read the pointer on LI scale. (X10 mA)
⑦
After measurement, remove the red and black test pins from the TR.
Good or Bad shall be determined by comparison to
standard TR.
Except large power TR, reading of the I
CEO
of normal silicon
TR is almost 0 mA.
6-8 Transistor Measurement
Never apply voltage to the input terminals.
WARNING
④
①
③
②
⑦
⑦
transistor
①
⑤
⑥
Case of NPN-TR
E: emitter
B: base
C: collector
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Содержание CX506a
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