Operation Manual

108

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 DataTrans Plus automatically compensates for decreased ambient pres-

sure when activated at high altitudes up to 14,000 feet (4,267 meters). Its pro-

gram contains a high altitude algorithm that reduces no decompression and

oxygen exposure limits to add a larger zone of caution.

Whenever the DataTrans Plus 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 DataTrans Plus au-

tomatically clears of any residual nitrogen and oxygen loading and resets to op-

erate at the new altitude.

WARNING: Altitude compensation provided by the DataTrans

Plus takes place when the unit is activated. DO NOT dive at

any different altitude until the DataTrans Plus shuts off. It will

automatically recalibrate when reactivated at the new altitude.