In the preflight of the Portable Oxygen Bottle (POB), what should the PSI not be below on the EMB?

During the preflight check of the Portable Oxygen Bottle (POB) on the EMB aircraft, it is crucial to ensure that the PSI (pounds per square inch) reading of the oxygen bottle is above a specific threshold to ensure it is serviceable in emergencies. The correct PSI level is 1200, as this ensures there is sufficient oxygen available for passengers and crew in case of decompression or other emergencies.

Having the PSI below this level could compromise the effectiveness of the oxygen system during an emergency. Oxygen bottles are filled to provide a reliable source of supplemental oxygen, and maintaining a minimum pressure is essential for the actual function of the system. This standard is in place to ensure safety and adequate response capacity in critical situations.