The alarms should continue until the air pressure reaches what value?

The alarms on the MSA G1 Self-Contained Breathing Apparatus are designed to provide audible and visual warnings to the user when the air pressure drops to a critical level. The correct value for the alarm to activate is 200 psi or less.

This specific setting is crucial for ensuring the safety of the user, as it alerts them to the diminishing air supply, allowing them to take appropriate action—such as leaving the hazardous environment or conserving breathing air. The choice of 200 psi provides a buffer to ensure that users are alerted before reaching a dangerously low air supply, giving them sufficient time to respond.

Setting the alarm at this threshold balances the needs for safety and operational efficiency, as it helps prevent situations where a user becomes unexpectedly low on air during critical maneuvers, thereby enhancing overall safety during operations.