6. Functional check
2020-12-04
OI06H-4418 SR 592
9
6.1
Place the facepiece in the
bag and grip the opening of
the bag so that it seals
around the breathing hose.
Grip the flow meter with the
other hand and hold it so that
it points vertically up from the
bag.
6.2
Read the position of the
ball in the tube. It should float
level with or just above the
175 l/min marking on the
tube.
If the flow rate is below the minimum value, check that
• The flow meter is vertical.
• The float can move freely.
• The air supply is not restricted by kinks or other restrictions in the
hoses.