What are the function checks of SCBA (Self Contained Breathing Apparatus)?

Function Checks:

• Close cylinder valve.
• Breathe normally to vent system.
• During venting observe gauge – whistle alarm should sound at preset pressure of 55bar +/-5bar.
• When gauge indicates ro, hold breath. Face piece should hold onto face indicating positive seal.
• Open cylinder valve slowly, but fully to pressurize system.
• Inhale and hold breath. Unit must balance, i.e. no audible leak.
• Continue breathing. Expired air should easily flow out of exhalation valve.
• Press center of rubber cover on demand valve checking supplementary supply.

Note: If leak detected, open cylinder valve, readjust head harness and retest.

During Use: