Figure 8-10. - Donning the side shoulder strap model of the self-contained oxygen-breathing apparatus.
the breathing tube is not connected, the wearer is breathing air from the atmosphere.
10. The minute the connection has been made to the demand regulator, the wearer breathes entirely from the cylinder.
Before starting the donning procedures for the back strap model (fig. 8-11) and as described below, open the air or oxygen supply cylinder valve two full turns or more, and check the pressure gauge on the regulator to see that it is operating properly. Then proceed as follows:
Step 1: Grasp the backplate in a convenient manner with one hand on each side of the plate in preparation to lift the equipment from the case.
Step 2: Lift the equipment from the case and permit the demand regulator and harness to hang freely.
Step 3: Raise the cylinder overhead and permit the elbows to find their respective harness shoulder strap loops.Continue Reading