Aeris Epic Operating Manual page 96

Oxygen Accumulation Time Remaining (OTR)
a
When the PIC is set for Nitrox operation, Oxygen Accumula-
tion (saturation or exposure) during a dive, or 24 hour period,
appears graphically as the O2 Bar Graph (Fig. 80a) when the
Alternate #2 (O2) screen is accessed. As time remaining before
reaching the Oxygen xposure Limit decreases, segments are
added to the O2 Bar Graph.
When the amount of time remaining before reaching the Oxy-
gen Limit becomes less than the No Decompression Dive Time
Remaining, calculations for that Depth will be controlled by
Oxygen. Oxygen Time Remaining will then appear as the Dive
Time Remaining display (Fig. 81a) as signified by the symbols
O2 and TIM . As Oxygen Accumulation continues to increase,
segments will add to the O2 Bar Graph.
Air Time Remaining (ATR)
The PIC calculates Air Time Remaining using a patented algo-
rithm that is based on a diver's individual Air Consumption Rate
and Current Depth. Tank Pressure is measured once each
second and an average rate of Consumption is calculated over a
0 second period. This Rate of Consumption is then used in
conjunction with a knowledge of the Depth dependence to
a
predict the Air required for the diver to make a safe controlled
Ascent including any required Decompression Stops.
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