What phenomenon should be minimized to prevent nuisance alarms in projected beam detectors?

In the context of projected beam detectors, the phenomenon to be minimized is nuisance alarms. Nuisance alarms refer to false alarms that occur when the detector is triggered by non-threatening conditions or disturbances rather than actual fire conditions. These can lead to unnecessary evacuations, a loss of trust in the fire alarm system, and potentially high costs associated with emergency responses.

To effectively reduce nuisance alarms, careful consideration must be given to the installation and calibration of the projected beam detectors. Factors such as environmental conditions, debris in the beam path, and the sensitivity settings of the detectors may need to be adjusted. Ensuring that the beams are aligned accurately and that they are not susceptible to interference from everyday activities or environmental changes is crucial. By minimizing nuisance alarms, the reliability and effectiveness of the fire alarm system are enhanced, thereby maintaining the confidence of users and occupants in emergency situations.