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Aeris A300 AI Manual

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A300 AI OPERATING MANUAL
© 2002 Design, 2011 Doc. No. 12-7265-r01 (12/28/11)
ALTITUDE SENSING AND ADJUSTMENT
Prior to the first dive of a series of repetitive dives, Altitude (i.e., ambient pressure) is measured upon activation, then every 15
minutes until a dive is made.
> Measurements are only taken when the unit is dry.
> Two readings are taken, the second reading 5 seconds after the first. The readings must be within 1 foot (30 cm) of each
other to record that ambient pressure as the current Altitude.
> No adjustments are made during any time that the Wet Contacts are bridged.
When diving in high altitude waters from 3,001 to 14,000 feet (916 to 4,270 meters), the A300 AI automatically adjusts to
these conditions providing corrected Depth, and reduced No Deco and O2 Times at intervals of 1,000 feet (305 meters).
At an elevation of 3,001 feet (916 meters), Depth calibration automatically changes from feet of seawater to feet of fresh water.
This is the first adjustment to the algorithm.
When the Conservative Factor feature is set On, NDLs are calculated based upon the next higher 3,000 foot (915 meter) Alti-
tude. All adjustments for Altitudes greater than 11,000 feet (3,355 meters) are then made to allowable dive times for 14,000
feet (4,270 meters). At Sea Level, calculations are based upon an Altitude of 6,000 feet.
The A300 AI will not function above 14,000 feet (4,270 meters).
RESET DURING A DIVE
The intent of the feature is to assist the diver by providing indication of Depth during the ascent and encourage return of the af-
fected unit to the factory for evaluation prior to further use.
If the A300 AI Resets (i.e.; is On, turns Off, then turns On again) for any reason during any dive, Nitrogen, O2, and ATR calcula-
tions are terminated (upon turning Off). Upon turning On, the graphic ERROR and the UP Arrow icons appear solid, and Current
Depth is displayed (Fig. 115). No other information is displayed. The Backlight remains operational.
Upon surfacing, the graphic ERROR is displayed solid for 5 seconds (Fig. 116), then the unit will shut off with operation blocked
permanently, even if the battery is replaced and attempts are made to reactivate the unit.
WARNING: In the unlikely event that this should ever happen, DO NOT continue diving with the unit,
return it for factory service as soon as possible.
WARNINGS
Decompression diving, or diving deeper than 130 FT (39 M), will greatly increase your risk of decompression sickness.
Decompression diving is inherently hazardous and greatly increases your risk of decompression sickness, even when performed
according to the dive computer's calculations.
Using an A300 AI is no guarantee of avoiding decompression sickness.
The A300 AI enters Violation Mode when a situation exceeds its capacity to predict an ascent procedure. These dives represent
gross excursions into decompression that are beyond the boundaries and spirit of the A300 AI's design. If you are following
these dive profiles, AERIS advises that you should not use an A300 AI.
If you exceed certain limits, the A300 AI will not be able to help you get safely back to the surface. These situations exceed
tested limits and can result in loss of some functions for 24 hours after the dive in which a violation occurred.
Fig. 115 - ERROR DURING
DIVE
Fig. 116 - ERROR UPON
SURFACING
… 44 …


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