how to test a step down transformer with a multimeter?

To test a step-down transformer with a multimeter, first ensure the transformer is disconnected from any power source. Set the multimeter to measure AC voltage. Connect the multimeter probes to the primary winding terminals and note the voltage reading. Next, connect the probes to the secondary winding terminals and measure the voltage again. Compare the readings to the transformer’s specifications; the secondary voltage should be lower than the primary voltage, confirming proper operation.