To switch to the secondary screen, which button must be pressed?

The correct choice for switching to the secondary screen is the button labeled "RESET." This button typically serves multiple functions, one of which can include toggling between screen modes or views. By pressing "RESET," the user can efficiently switch to the secondary display screen, which may provide enhanced information or different operational parameters critical for the user’s immediate needs while operating the SCBA.

The operation of the SCBA relies heavily on the ability to quickly access various screens for monitoring essential metrics, making it vital to understand the specific function of each button available. Each button is designed with a purpose, and knowing their functions allows for optimal use of the SCBA during critical situations.