If a smoke detector’s sensitivity is found to be 0.5%/ft obscuration outside of its UL listed range, what is the required action?

Question: If a smoke detector’s sensitivity is found to be 0.5%/ft obscuration outside of its UL listed range, what is the required action?

Answer options:

• Note in the report and re-test in 6 months
• Nothing, as long as it still alarms with canned smoke ✅ Clean and recalibrate or replace the detector
• Adjust the FACP software sensitivity setting to compensate

Correct answer: Clean and recalibrate or replace the detector

Explanation: Section 5.7.4.3 states that detectors found outside the range must be cleaned/recalibrated or replaced. Standard practice is replacement if cleaning fails.