Diving In Nitrox Mode; Before Diving - Suunto Cobra User Manual

m
PO2
O2%
OLF
Fig. 3.21. Nitrox display. Maxi-
mum depth based on set O
(21%) and PO (1.4 bar) is 54.1
2
m [177 ft].
m
O2%
NO DEC TIME
OLF
bar
DIVE
Fig. 3.22. Diving in Nitrox
mode. The O % is set to 32%.
2
28

3.4. DIVING IN NITROX MODE

3.4.1. BEFORE DIVING

This dive computer can be set for diving with standard air
only (Air mode) or it can be set for diving with Enriched
Air Nitrox (EANx) (Nitrox mode).
If set to the Nitrox mode, the correct oxygen percentage
of the gas in your cylinder must always be entered into
the computer to ensure correct nitrogen and oxygen
calculations. The dive computer adjusts its mathematical
%
2
nitrogen and oxygen calculation models according to
the entered O
on Nitrox result in longer no-decompression times and
shallower maximum depths. When the dive computer
is set in Nitrox mode then the Dive Planning and Dive
Simulation modes both calculate with the O
values that are currently in the computer.
DEFAULT NITROX SETTINGS
MAX
In the Nitrox mode, the default setting is for standard
air (21% O
TIME
is adjusted to any other percentage of oxygen (22%
- 50%).
If unused, the computer will retain the manually entered
value for the selected oxygen percentage for about two
hours, after which it will revert to the default setting of
21% O
The default setting for maximum oxygen partial pressure
is 1.4 bar, however you are able to set it in the range of
1.2 - 1.6 bar.
% and PO
2
). It remains in this setting until the O
2
.
2
values. Calculations based
2
% and PO
2 2
%
2