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to be understated and will affect decompression calculations. If you want to adjust the
computer to provide more conservative calculations, use the personal adjustment
feature to affect decompression calculations, or reduce the PO
setting to affect oxygen
2
exposure according to the entered O
% and PO
values. Calculations based on nitrox
2
2
use result in longer no-decompression times and shallower maximum depths than
diving with air.
As a safety precaution, the oxygen calculations in the computer are made with an
oxygen percentage of 1% + set O
% .
2
When the dive computer is set in mode, the Dive Planning mode calculates using the
O
% and PO
values that are currently in the computer.
2
2
To set the nitrox, trimix and/or heliox mixes, refer to Section 5.8.1. Setting the gases.
Default gas mix settings
In the MIXED mode, the Suunto D9tx allows you to set 1–8 gas mixes containing
8–99% oxygen and 0–92% helium.
In the MIXED mode, the default setting is standard air (21% O
and 0% He). It remains
2
in this setting until the O
% is adjusted to any other percentage of oxygen (8%–99%),
2
or the He% is adjusted to any other percentage of helium (0–92%). The default setting
for maximum oxygen partial pressure is 1.4 bar, however you are able to set it in the
range of 0.5–1.6 bar.
80
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