How to measure the quality of triode with digital multimeter
Regarding the measurement method of the quality of the triode, the measurement tool used here is a digital multimeter, to detect whether the NPN triode is on the road or the PNP triode on the road, let's learn together.
1. NPN triode detection on the road
(1) Adjust the multimeter to the "diode" gear
(2) The red test lead is connected to the B pole of the transistor, and the black test lead measures the C pole and E pole respectively. At this time, the forward voltage of the multimeter should be 0.5-0.7.
(3) The black test lead is connected to the B pole, and the red test lead measures the C and E pins. The reverse direction should be infinite, and the multimeter displays "1".
(4) For the forward and reverse measurement of C pole and E pole, the forward voltage drop value should be 1:00, and the reverse direction is infinite.
2. PNP triode detection on the road
The same as the NPN triode measurement method, the test leads are opposite, the black test leads measure the base and the red test leads measure the positive direction of the collector and the emitter.
