During routine SCBA checks, the pressure on the cylinder gauge must be in agreement with the regulator pressure gauge within what range?

The correct answer is that during routine SCBA checks, the pressure on the cylinder gauge must be in agreement with the regulator pressure gauge within a range of 10%. This agreement is crucial for ensuring that the SCBA system is functioning properly and that firefighters can rely on the equipment when needed.

Maintaining this range of agreement is important for operational safety. If the cylinder gauge and regulator pressure gauge readings are too far apart, it may indicate a malfunction or a potential issue with the SCBA. For example, if the cylinder is full but the regulator gauge reads significantly lower, it could suggest a leak in the system, which would compromise the air supply.

A 10% variance is considered acceptable based on industry standards and ensures that users can trust the readings during firefighting operations. This tolerance accounts for minor discrepancies that may arise due to differences in gauge accuracy or other minor factors, while still ensuring that firefighters have adequate air supply when responding to emergencies.