How to check new Breathing Apparatus (BA) and precautions taken while using?

PHYSICAL CHECK:

Check the breathing apparatus all parts visually

AIR PRESSURE CHECK:

1. Air pressure in full bottle= 200 bar
2. Liquid capacity in cylinder = 6 litre
3. Air pressure (200) x liquid capacity (6) = Total compressed air (1200)

WARNING WHISTLE CHECK:

Whistle must sounded in last 10 to 8 seconds

INTERNAL OR EXTERNAL AIR LEAK CHECK:

1. Drop of pressure in 10 second in gauge tube (having high pressure) should less than 5 bar.
2. Close cylinder valve and Wear face mask tightly, intake air if air is coming then there is leakage in mask supply hose.