SUUNTO Vyper Air - Manual (Page 77)

6.2.3. Oxygen limit fraction (OLF%)
If set to the NITROX mode, in addition to tracking the diver's exposure to nitrogen, the
instrument tracks the exposure to oxygen. These calculations are treated as entirely
separate functions.
The dive computer calculates separately for Central Nervous System oxygen toxicity
(CNS) and Pulmonary Oxygen toxicity, the latter measured by the addition of Oxygen
Toxicity Units (OTU). Both fractions are scaled so that the maximum tolerated exposure
for each is expressed as 100%.
The Oxygen Limit Fraction (OLF%) displays only the value of the higher of the two
calculations. The oxygen toxicity calculations are based on the factors listed in Sec-
tion 10.3. Oxygen exposure .
6.2.4. Gas change and multiple breathing gas mixes
The Suunto Vyper Air allows gas changes to enabled gas mixes during the dive. Gas
changes are made by following the procedure below:
CHANGING GAS MIX. SCROLL
THROUGH ENABLED MIXES BY
PRESSING THE UP OR DOWN
BUTTONS. SELECT NEW MIX BY
PRESSING THE SELECT BUTTON.
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