In B28, what should be done if a leak detector is found to be out of calibration?

• A. Tag out the detector, repair or replace the sensor, recalibrate, and re-test to ensure accurate readings
• B. Continue to use the detector while noting readings
• C. Recalibrate and resume operation without tagging
• D. Replace the entire system

Answer: (A)

When a leak detector is out of calibration, its readings can no longer be trusted. The safety approach is to isolate the detector from service until it’s fixed. Tagging it out communicates that maintenance is required and prevents accidental use. Then repair or replace the faulty sensor so the detector can function correctly. After repair, recalibrate the unit and run a re-test to confirm that its readings are accurate before putting it back into operation. This ensures leaks are detected reliably, which is crucial when dealing with flammable refrigerants. Simply continuing to use it with questionable readings or resuming operation without tagging would leave a safety gap. Replacing the entire system is unnecessary for a calibration issue.