Application Examples
5
Keysight U1401B User’s and Service Guide
111
5
Probe the base terminal with the red test lead, and the other two pins (in turn)
with the black test lead. Record the readings.
6
Repeat
, but reverse the red and black test leads. Record the readings.
7
The polarities (NPN or PNP) and terminals can be identified by referring to
and
be
is always greater than V
bc
. Most TO-92
transistors will have pin 1 as the emitter. It is recommended that you check
and verify with the specific data sheet from the manufacturer.
Table 5-2
Base terminal according to probe test
Pin
Probe
Base
Red/Black
Black/Red
1-2
OL
OL
3
1-3
OL
OL
2
2-3
OL
OL
1
Table 5-3
Polarity and terminals if Pin 3 is the base
Test leads
Pins
Terminals
(V
be
>V
bc
)
Type
3-1
3-2
Red/Black
0.6749 V
0.6723 V
ECB
NPN
0.6723 V
0.6749 V
CEB
NPN
Black/Red
0.6749 V
0.6723 V
ECB
PNP
0.6723 V
0.6749 V
CEB
PNP
Содержание U1401B
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Страница 61: ...Making Measurements 3 Keysight U1401B User s and Service Guide 61 Figure 3 1 DC voltage measurement ...
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Страница 107: ...Application Examples 5 Keysight U1401B User s and Service Guide 107 Figure 5 5 Zener diode test ...
Страница 128: ...5 Application Examples 128 Keysight U1401B User s and Service Guide Figure 5 17 Verifying a frequency transmitter ...