SCUBAPRO-UWATEC ALADIN SPORT Technical Information PDF herunterladen (Seite 10)

1.3 Nitrox information (O

information)

For dives with compressed air in normal recreational diving, nitrogen is the decisive gas for the decompres

sion calculations. When diving with Nitrox, the risk of oxygen toxicity rises with the increase of the fraction

of oxygen and the increase of depth and can limit dive time and the maximum depth. Aladin

ONE includes

this in the calculations and displays the necessary information:

% MIX> Fraction of oxygen: The fraction of oxygen in the Nitrox mixture can be set

with SmartTRAK between 21% (normal compressed air) and 50% in 1% incre

ments. Your selected mix will be the basis for all calculations.

ppO

2 max.

Maximum allowed partial pressure of oxygen: the higher the fraction of oxy-

gen in the mixture, the shallower the dive depth at which this value of the

partial pressure of oxygen is reached. The depth at which ppO

max. is reached

is called Maximum Operating Depth (MOD).

When you enter the settings for the gas mixture with

SmartTRAK, SmartTRAK

will display

the cor

responding MOD. Aladin

ONE

warns the diver

visually once

the depth is reached at which the ppO

reaches the maximum allowed value

->15.

The setting of ppO

max. is 1.4 bar.

<CNS O

> Oxygen toxicity: With the increased percentage of oxygen, the oxygen in the

tissues (especially in the central nervous system (CNS)) becomes important. If

the partial pressure of oxygen rises above 0.5 bar, the CNS O

value increases,

if the partial pressure of oxygen is below 0.5 bar, the CNS O

value decreases.

The closer the CNS O

value is to 100%, the closer the limit where symptoms

can occur ->15.

Nitrox diving may only be attempted by experienced divers after proper training

from an internationally recognized agency.

1 Terminology / Symbols

III UWATEC

Aladin

ONE

CNS O

increases

ppO

Depth

at which ppO

reaches 0.5 bar

for three typical mixes

0.5 bar

21% 13m (43ft)

32% 6m (20ft)

36% 4m (13ft)

CNS O

decreases

0.21 bar

WARNING

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 23 24

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