How to use an analog multimeter to measure each pin of a triode?
Answer: There is a power supply inside the analog multimeter, the black test lead outside is connected to the positive pole of the power supply, and the red test lead outside is connected to the negative pole of the power supply
(1) When measuring the base, emitter and collector of NPN triode, the steps are as follows:
First determine the base (b): first adjust the multimeter to the ohm range, use the black test lead to connect one pin, and then use the red test lead to touch the other two pins respectively. If the multimeter has a large deflection, the black test lead is connected. The pin is the base (b). If the phenomenon is not the case, then interchange the pins until this phenomenon occurs.
Then determine the emitter (e) and collector (c): After the base is determined, use the red and black test leads to contact the other two pins respectively, and connect the human body resistance between the base and the black test lead. If the multimeter has a large If the deflection, the black test lead is connected to the collector, and the red test lead is connected to the emitter. If there is no such phenomenon, reversely connect the red and black test leads until this phenomenon occurs.
(2) When measuring the base, emitter and collector of the PNP type triode, the steps are as follows:
First determine the base (b): first adjust the multimeter to the ohm range, use the red test lead to connect one pin, and then use the black test lead to touch the other two pins respectively. If the multimeter has a large deflection, the red test lead is connected. The pin is the base (b). If the phenomenon is not the case, then interchange the pins until this phenomenon occurs.
Then determine the emitter (e) and collector (c): After the base is determined, use the red and black test leads to contact the other two pins respectively, and connect the human body resistance between the base and the black test lead. If the multimeter has a large If the deflection, the red test lead is connected to the collector, and the black test lead is connected to the emitter. If there is no such phenomenon, reversely connect the red and black test leads until this phenomenon occurs.
