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63
HIGH OXYGEN ACCUMULATION
It is important that you understand that conducting repetitive dives using enriched nitro-
gen-oxygen (nitrox) mixtures can lead to oxygen buildup, reducing oxygen tolerance while
increasing the risk of pulmonary oxygen toxicity.
AERIS strongly recommends that you avoid exceeding oxygen exposure limits, and reminds
you that nitrox diving requires special training and understanding of the effects of oxygen
toxicity.
The O2 Bar Graph
provides a graphic representation of your oxygen accumulation, displaying
either oxygen accumulated during that dive, or during the repetitive dives you conduct during that
24 hour period, whichever of the two is greater at that time.
The yellow
Caution Zone
of the O2 Bar Graph offers you a convenient way to consistently moni-
tor how close you are coming to the limits of oxygen exposure.
Use it as a visual reference to
place a wider margin of protection between you and the Limits.
If the theoretical amount of oxygen accumulated equals, or ex-
ceeds, the limit for a single exposure, or the exposure limit for a 24
hour period, Oxygen Dive Time Remaining becomes zero (0:00)
and the O2 Bar Graph will enter the red
O2 (Danger) Zone
(Fig.
61). The red LED will flash, the Audible Alarm will sound (unless
set OFF) and the UP Arrow and the full O2 Bar Graph will flash as
a warning until the level of oxygen decreases below the limit.
Fig. 61 - High O2
Full BG Flashing
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