What indicates that the PASS device is activated on the Pak-Alert?

The Pak-Alert system on the Scott Air-Pak X3 SCBA is designed to enhance firefighter safety by providing alerts in critical situations. When the PASS (Personal Alert Safety System) device is activated, it signals that the wearer is in distress or has not moved for a certain period. The indication of activation is characterized by three sharp chirps. This distinctive auditory signal serves as an alert to other team members nearby that the crew member may require assistance.

The continuous alarm sound typically indicates that an emergency situation is ongoing or that a different kind of alarm is being triggered, such as an out-of-air condition. Flashing red lights might indicate that the unit is receiving power or can be an alert for other failure modes, but they do not specifically confirm the PASS is activated. A steady green light generally shows that the system is functioning properly and not in an alarm state. Thus, the three sharp chirps are the specific and unmistakable auditory cue that signifies the PASS device's activation.