What is the main sign of the PBE's correct operation during inflating?

The main sign of the Protective Breathing Equipment (PBE) operating correctly during inflation is indicated by a green flashing light. This visual signal means that the equipment is functioning properly and that the inflation process is occurring as intended. The green flashing light typically conveys a sense of safety and readiness, confirming that the PBE can be relied upon in an emergency situation.

In contrast, other signals, such as a bright flashing light or a continuous beep sound, may not indicate proper operation and could suggest a malfunction or error in system activation. A solid red light is often a warning signal, indicating that there is an issue, which means it does not signify correct operation. This understanding is vital for quickly identifying operational status in emergency equipment, ensuring safety for users during critical moments.