The Forensic Detectors FD-D001 is a Low Level & Fast CO (Carbon Monoxide) Detector that triggers an audible alarm when CO detected > 25ppm. View for memory function, manual and troubleshooting steps. FD-D001 Low Level & Fast Carbon Monoxide Alarm User Manual FD-D001 Peak Memory Function After an alarm event, the CO alarm stores in memory the alarm event – CO concentration level. The detector has memory slots CO, C1…C9. By pressing the MENU Button, the memory location will be shown and then press TEST button to see the numerical ppm value that was recorded. Press MENU again to go…