Po2 Alarm - Cressi Leonardo Manual De Istrucciones

PO2 ALARM

(im. 17)
The computer is able to constantly monitor
another basic parameter relating to oxygen,
that is O2 partial pressure value (PO2). Oxy-
gen toxicity may be caused both by an exces-
sive exposure (CNS toxicity, seen in the
previous chapter) and by exceeding the maxi-
mum Po2, which is exceeding the maximum
depth allowed by the mixture used. As already
seen, the PO2 limit value is set by the diver in
a range between 1.2 bar and 1.6 bar. Leonardo
considers the 1.6 bar value as the partial pres-
sure maximum allowable limit and, according
to the used mixture, automatically signals the
maximum depth which may be reached. Re-
member that even by using air, you may reach
the oxygen toxicity limit. Such limit varies ac-
cording to the set PO2. Leonardo is manufac-
tured with a preset value of 1.4 bar, whose
corresponding maximum depth is 188 ft. in air.
It is possible to set the computer on other PO2
values, up to a maximum of 1.6 bar. To warn
the diver about the excess of Po2, when rea-
ching the limit depth relating to the set PO2
(1.2 bar to 1.6 bar), a sound alarm will start
while the Po2 icon will be flashing, indicating
the current depth. As soon as you return to a
depth shallower than the limit one, the sound
alarm stops, current depth and the Po2 icon
stop flashing. The latter icon remains lit up du-
ring the residual part of the dive, in the LOG
BOOK and in the PRE DIVE screen.
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