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.
Donning the Back Strap Model
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
Step 2: Lift the equipment from the case and
permit the demand regulator and harness to hang
Step 3: Raise the cylinder overhead and permit the
elbows to find their respective harness shoulder