How can the operation of a photoelectric smoke detector be tested?

The operation of a photoelectric smoke detector can be tested effectively by actuating a test switch. This test simulates smoke entering the unit, allowing the detector to respond as it would in a real situation. This method verifies that the electronic components of the detector are functioning correctly and can accurately sense smoke. This is a critical part of maintenance to ensure the alarm system will respond in the event of an actual fire.

Changing the batteries regularly is also important for ensuring the smoke detector has adequate power; however, this does not test the detection capability. A visual inspection may help identify any obvious signs of damage or issues, but it does not confirm the operational status of the detector. Cleaning the detector unit is important for maintenance as dust and debris can affect performance, but like the other options, it does not specifically test the unit’s ability to detect smoke. Thus, while all these options contribute to proper smoke detector maintenance, actuating a test switch is the definitive method for verifying functionality.