What function shall be tested for each newly installed smoke detector?

The function that should be tested for each newly installed smoke detector is smoke entry. This test is crucial because it verifies that the smoke detector is capable of detecting smoke particles in the air, which is its primary function. Smoke detection is essential for ensuring that the device will activate and sound an alarm when smoke is present, signaling potential fire hazards.

Testing for smoke entry simulates real-life conditions to confirm that the smoke detector will respond appropriately to smoke from various sources, thus ensuring the safety of occupants by providing early warnings of fire.

Other aspects like sound activation and battery backup are important too; however, they are supplementary functionalities that contribute to the overall effectiveness of the smoke detector. Sound activation checks whether the alarm emits a sound when smoke is detected, but it's the ability to sense smoke that is fundamental to the device's purpose. Similarly, battery backup is crucial for ensuring the detector works during power outages but does not address the primary role of detecting smoke. Temperature control, while relevant in certain types of detectors, is not a standard function in all smoke detectors and does not apply universally. Therefore, focusing on smoke entry is essential for verifying the core function of smoke detectors.