What maintenance practice best ensures detector reliability?

• A. Keeping calibration dates, test results, sensor replacement, and alarm history up to date
• B. Ignoring minor detector drift
• C. Replacing detectors only when they fail
• D. Not recording anything

Answer: (A)

Proactive maintenance with thorough documentation keeps detectors reliable. Regular calibration ensures the detector’s readings match actual gas concentrations, while documented test results confirm that calibration and functional checks were completed and are within spec. Replacing aging sensors prevents drift from degrading accuracy, so the system continues to respond correctly when a leak occurs. Keeping an alarm history provides a traceable record of alerts, tests, and repairs, helping to identify patterns, schedule preventive work, and verify that the detectors will operate when needed. This combination of planned maintenance and complete records creates trust in the detector system, which is crucial for safety in flammable-refrigerant environments. Ignoring drift, waiting for failure, or failing to record maintenance removes the checks that keep detectors dependable and compromises readiness to detect hazards.