SCOTT Sigma 2 User Manual

SIGMA 2
10
4.4 FACEMASK SEAL CHECK
1. Insert fingers in facemask seal and
check for a steady flow of air from the
mask. Remove fingers and allow mask to
re-seal.
4.5 BYPASS CHECK
1. Open the bypass and check there is a
steady flow of air into the facemask.
2. Close the bypass.
4.6 LEAK TEST
1. Take a breath and hold it. Release
hand-wheel locking-mechanism and close
the cylinder valve.
2. Listen for leaks and monitor gauge for
10 seconds. The reading on the gauge
should not fall during this period.
4.7 WHISTLE TEST
1. Slowly breathe down the air from the
system and check that the whistle sounds
clearly at between 50 and 60 bar.
2. If the whistle or facemask fail the test,
return the apparatus for servicing, with an
explanatory note attached, in accordance
with the SIGMA 2 Servicing Instructions.

SCOTT Sigma 2 Specifications

General

Type	Self Contained Breathing Apparatus (SCBA)
Application	Firefighting, Industrial
Cylinder Duration	Varies based on cylinder size and breathing rate
Approval	EN 137
Compatibility	Compatible with various cylinders
Features	Ergonomic design