Operation Manual

9
DataTrans Plus
your relative oxygen tolerance dosage (OTU), showing the maximum of either
per dive allowable oxygen, or 24 hour period allowable oxygen. As your expo-
sure (accumulation of oxygen) increases during the dive, segments will add to
the graph around the upper right perimeter of the screen. As accumulation
decreases, the bar graph will begin to recede, indicating that additional expo-
sure (accumulation) is allowed for that dive, and that 24 hour period.
The O2 Bar Graph also assists you with managing high partial pressure of oxy-
gen (PO2) by flashing the large red Danger zone segment (Fig. 7a) as a warn-
ing when the level of PO2 exceeds the maximum allowed limit of 1.60 BAR
(ATA). This is explained in detail in the Handling the Extremes section.
Prior to a repetitive nitrox dive, if the segments of the O2 Bar Graph are dis-
played during the Pre Dive Planning Sequence™ (PDPS), and no segments of
the Tissue Loading Bar Graph are displayed (Fig. 8), that next dive is calcu-
lated to be controlled by oxygen loading.
Variable Ascent Rate Indicator
™
The Variable Ascent Rate Indicator™ (VARI), located along the lower/right
portion of the screen (Fig. 9), is provided to help you to avoid excessive ascent
rates by providing a visual representation of ascent speed, rather than just
showing that you are ascending too fast.
Fig. 8 - Oxygen Control
Fig. 9 - Variable Ascent
Rate Indicator
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DECO
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