OM111 7
P1972-OM-367 Rev 6 Chapter 3
CHAPTER 3 OPERATION
Set the supply pressure to the following guidelines:
If a BPR is fitted, set the exhaust pressure to 2-4 bar suction, relative to chamber ambient
pressure.
When the Ultralite 2 mask is used it should be adjusted to the optimum breathing resistance
using the free flow control knob and set at the point where free flow on the inlet valve has just
stopped.
When the mask is initially donned, the head harness can be adjusted by pulling each strap
leg through the buckle for individual user comfort.
0-150 msw 6 - 12 bar Over chamber pressure
200 msw 8 - 12 bar Over chamber pressure
250 msw 10 - 12 bar Over chamber pressure
300 msw 11 - 12 bar Over chamber pressure
350 - 450 msw 12 bar Over chamber pressure
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