Which segment displays when the pressure reaches its specified range?

The indicated answer reflects a functioning feature of the MSA G1 SCBA, where specific segments on the device are designed to communicate critical information about the pressure of the air supply. When the pressure of the air reaches a specified range, Segment 2 is programmed to illuminate or display, providing the user with a clear visual indicator that the air pressure is within a safe and operational range. This feature is crucial for safety as it allows users to be aware of their air supply status quickly, ensuring they can make informed decisions while using the SCBA in emergency situations. Proper functioning of this indicator segment is integral to maintaining situational awareness and personal safety during operations requiring breathing apparatus.