When testing for proper calibration of smoke detectors, which option would be disallowed?

When testing for proper calibration of smoke detectors, which option would be disallowed?

• A. Aerosol spray or canned smoke
• B. A manufacturer-approved smoke test
• C. Using a calibrated detector tester
• D. Visual check during routine service

Answer: (A)

Testing for proper calibration requires a known, repeatable stimulus that matches the detector’s specified response. Aerosol spray or canned smoke doesn’t provide a controlled, calibrated challenge—its particle size, concentration, and dispersion vary widely and can leave residues inside the sensor. That variability can lead to unreliable results, potential sensor contamination, and even damage, so it’s not an approved method for calibrating smoke detectors. Use a manufacturer-approved smoke test or a calibrated detector tester, which deliver a documented, consistent stimulus. Visual checks during routine service don’t verify calibration, though they’re still useful for basic inspection.

Testing for proper calibration requires a known, repeatable stimulus that matches the detector’s specified response. Aerosol spray or canned smoke doesn’t provide a controlled, calibrated challenge—its particle size, concentration, and dispersion vary widely and can leave residues inside the sensor. That variability can lead to unreliable results, potential sensor contamination, and even damage, so it’s not an approved method for calibrating smoke detectors. Use a manufacturer-approved smoke test or a calibrated detector tester, which deliver a documented, consistent stimulus. Visual checks during routine service don’t verify calibration, though they’re still useful for basic inspection.