When performing sensitivity testing on a smoke detector, what constitutes a failure, and what actions must be taken?

When performing sensitivity testing on a smoke detector, a failure occurs when the detector's response falls outside the manufacturer's specified sensitivity range or the limits defined by applicable codes and standards, such as NFPA 72. Sensitivity testing involves using calibrated aerosol generators or other testing devices to introduce a known concentration of smoke or aerosol into the detector's sensing chamber. The detector's response, typically measured in terms of obscuration per foot or percentage obscuration, is then compared to the accept....