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DOWN BUTTON
TOGGLES BETWEEN
O
2
, MAXIMUM DEPTH
CURRENT TIME AND
TANK PRESSURE.
UP BUTTON
TOGGLES BETWEEN
PO
2
, OLF%, DIVE
TIME AND WATER
TEMPERATURE.
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%.
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