How can check a transistor with digital multimeter?

Answer 1

If your multimeter has a transistor check (hfe), then place the Collector,Base& Emitter in the CBE port of multimeter.

Turn the shaft to Diode mode.

If the value is zero,skip that transistor.

You can use the forward resistance of each junction, using the ohms range or diode check function.

Put the leads on the Base and Emitter, then reverse the leads. You should get about 600Ohms forward bias and open circuit (infinity) reverse bias.

Do the same between the Base and Collector. You should get the same results.

Finally put the leads between the Collector and Emitter. You should get open circuit both ways around.

Be aware that some high power transistors have a diode across the Emitter and Collector.

These tests will just be a basic 'go - no go' test. It may pass this test and yet still not perform fully.

You can see obvious faults, like a dead short both ways on each junction or across the Emitter to Collector.

Answer 2

check this link

<url>http://www.electronics-radio.com/articles/test-methods/meters/multimeter-diode-transistor-test.php</url>