Oceanic Personal Dive Computer Veo 100Nx - Manual (Page 63)

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ALTITUDE COMPENSATION
Atmospheric pressure decreases as Altitude increases above sea level. Weather systems
and ambient temperature also affect barometric pressures. Consequently, depth reading
instruments that do not compensate for the decrease in ambient pressure indicate depth
readings shallower than the depth they are actually at.
The Veo 100Nx automatically compensates for decreased ambient pressures for Altitudes
between 2,000 (610 meters) and 14,000 feet (4,270 meters). Its program contains a
high altitude algorithm that reduces no decompression and oxygen exposure limits to add
a larger zone of caution.
The Veo 100Nx senses ambient pressure when it is activated, every 15 minutes while it is
activated, or every 30 minutes when it is not activated. At an Altitude of 2,000 feet (610
meters), it will automatically recalibrate itself to measure depth in feet of fresh water rather
than feet of sea water. It will then readjust the no decompression and oxygen limits at
additional intervals of 1,000 feet (305 meters). Therefore, when returning to lower Alti-
tudes, diving should not be conducted until the unit automatically clears of any residual
nitrogen and oxygen loading and resets to operate at the new lower Altitude.
WARNING: The Veo 100Nx will not sense ambient pressures or provide
Altitude compensation when it is wet. DO NOT dive at any different Altitude
until the unit shuts off and is reactivated at the new Altitude.
If the unit is activated at elevations higher than 14,000 feet (4,270 meters), it
will perform a diagnostic check followed by immediate shutdown.