About Monitoring Principles

1. Sensor uses infrared background radiation as inspection principle.

2. During installation, avoid direct sunlight and heat sources to prevent interference with inspection results.

3. Can only detect changes in background radiation, not monitor movement of background radiation.

4. To avoid duplicate alarms, logical judgments are made internally:

--a. If previous state is "no one state", upon detecting someone, immediately report alarm and set state to "Human status". Start 30-second "Human status countdown" timer, do not check again until timer ends.

--b. If "Human status countdown" timer stops and someone is still present, restart timer for 30 seconds.

--c. If "Human status countdown" timer stops and nobody is present for 10 seconds, sensor sets status to "no one state" and reports information.

Incorrect to test immediately by waving arms after configuration.

Correct testing method is to leave sensor for at least 40 seconds before reappearing within detection range.