Specifications

500AI

Atmospheric pressure decreases as altitude increases above sea level. Weather

systems and ambient temperature also affect barometric pressures. Conse-

quently, depth reading instruments that do not compensate for the decrease in

pressure indicate depth readings shallower than the depth they are actually at.

The 500AI automatically compensates for decreased ambient pressure when

activated at high altitudes up to 14,000 feet (4,267 meters). Its program con-

tains a high altitude algorithm that reduces no decompression and oxygen ex-

posure limits to add a larger zone of caution.

Whenever the 500AI is manually activated at altitudes higher than 2,000 feet

(610 meters), it will automatically recalibrate itself to measure depth in feet of

fresh water rather than feet of sea water. Therefore, when returning to lower

altitudes, diving should not be conducted until the 500AI automatically clears

of any residual nitrogen and oxygen loading and resets to operate at the new

altitude.

WARNING: Altitude compensation provided by the 500AI takes

place when the unit is activated. DO NOT dive at any different

altitude until the 500AI shuts off. It will automatically

recalibrate when reactivated at the new altitude.