SUUNTO Cobra - Manual (Page 30)

28
TIME DIVE
m
OLF
bar
MAX
O2%
NO DEC TIME
PO2
O2%
OLF
m
Fig. 3.21. Nitrox display. Maxi-
mum depth based on set O
2
%
(21%) and PO
2
(1.4 bar) is 54.1
m [177 ft].
Fig. 3.22. Diving in Nitrox
mode. The O
2
% is set to 32%.
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
nitrogen and oxygen calculation models according to
the entered O
2
% and PO
2
values. Calculations based
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
2
% and PO
2
values that are currently in the computer.
DEFAULT NITROX SETTINGS
In the Nitrox mode, the default setting is for standard
air (21% O
2
). It remains in this setting until the O
2
%
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
2
.
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.