SUUNTO Vyper2 - Manual (Page 31)

NITROX DIVE MODE ACTIVATION.
MAXIMUM OPERATIONAL DEPTH BASED ON
SET O
2
% (21%) AND PO
2
(1.4 BAR) IS 56.7 M.
If set to NITROX mode, the Suunto Vyper2 will additionally show on the alternative display:
•
the oxygen percentage, labeled O
2
%
• the set oxygen partial pressure limit, labeled PO
2
• the current oxygen toxicity exposure, labeled OLF
• maximum depth
• current time
• water temperature
• dive time
UP BUTTON
TOGGLES
BETWEEN PO
2
,
OLF, DIVE TIME
AND WATER
TEMPERATURE.
DOWN BUTTON
TOGGLES
BETWEEN O
2
,
MAXIMUM DEPTH
AND CURRENT
TIME.
6.2.3. Oxygen limit fraction (OLF)
If set to 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 Section
9.3 “Oxygen exposure”.
6.2.4. Gas change and multiple breathing gas mixes
The Suunto Vyper2 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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