What should be placed inside a microwave during a PDI?

During a Pre-Delivery Inspection (PDI) of a microwave, it is essential to include a container of water inside the microwave. This is because filling the microwave with water serves several critical purposes.

Firstly, having water in the container helps to check the microwave's heating capabilities. When the microwave is turned on, the water will demonstrate whether the microwave is functioning correctly by heating up, which indicates that the magnetron is operating as intended.

Secondly, using water helps prevent damage to the microwave itself. An empty microwave can overheat and potentially damage the internal components, as it relies on the presence of food or liquid to absorb microwaves. The container of water acts as a safeguard against this risk.

In contrast, placing an empty container, food items, or a glass plate inside does not serve the same functional purpose during the PDI. Each of those alternatives either doesn't test the heating capability effectively or may not provide adequate protection against possible overheating. Thus, the use of a container of water during a PDI is the most appropriate choice for ensuring that the microwave is operating correctly and safely.