Thyristor & Power Control Circuits Unit 2 – Silicon Controlled Rectifier
Exercise 1 – Testing an SCR with a Multimeter
EXERCISE OBJECTIVE
When you have completed this exercise, you will be able to test a typical SCR by using a
multimeter. You will verify your results with a multimeter.
EXERCISE DISCUSSION
- The ohm function or diode function of the digital multimeter is required to test the SCR.
- If conditions permit, the SCR should be removed from the circuit when testing it with an
ohmmeter. - The gate-to-cathode junction of the SCR is the only junction that can be measured as a
normal diode junction. - Conduction between the anode and gate terminals or between the anode and cathode
terminals indicates a defective SCR.