Check Doorbell Transformer Voltage

What happens here

To troubleshoot the power issue, the electrician first goes to the electrical panel to locate the doorbell transformer. He then uses a multimeter, specifically a clamp meter with voltage leads, to test the output voltage of the doorbell transformer. The multimeter reading shows 18 volts, which is identified as the correct and expected voltage for a standard doorbell system, indicating the transformer itself is functioning correctly.

Goal: Verify the voltage output from the doorbell transformer.