8
Sigma 2 Type 2
Fit the chin into the chin-cup, pull the harness
over the top of the head and tighten the straps
in sequence: bottom, middle, top. DO NOT
over-tighten.
Head-net
Tighten the side straps for a firm, comfortable
fit. DO NOT over-tighten as this distorts the
face seal.
OPEN CYLINDER VALVE
With the head-net straps fully extended, insert
the chin into the chin-cup and use the loop at
the back of the head-net to pull the head-net
over the head.
Tighten the top strap to bring the visor and ori-
nasal mask to the correct level.
Slowly open cylinder valve fully and inhale
sharply to start the air supply to the facemask.
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