User`s manual

Depth
0 ft - 19.3 ft.
19.7 ft. - 58.7 ft.
19.7 ft. - 58.7 ft.
No
segments
0.0 - 12.7 ft./min
0.0 - 19.3 ft./min
0.0 - 25.9 ft./min
3
segments
13.1 - 19.3 ft./min
19.7 - 25.9 ft./min
26.2 - 39 ft./min
6
segments
19.7-25.9 ft./min
26.2-39 ft./min
39.4-52.1 ft./min
8
segments
26.2 ft./min (SLOW)
39.4 ft./min (SLOW)
16.4 ft./min (SLOW)
212
which is exceeding the maximum depth allowed by the mix-
ture used. As already seen, the PO2 limit value is set by the
diver within a range between 1.0 bar and 1.6 bar. consi-
ders the 1.6 bar value as the partial pressure maximum
allowable limit and, according to the used mixture, automati-
cally signals the maximum depth which may be reached.
Remember that, even by using air, you may reach the oxygen
toxicity level. Such limit varies according to the PO2 value set.
is preset on a value of 1.4 bar whose corresponding
maximum depth is, by air, 184 ft. Of course, it is possible to set
the computer on other PO2 values, up to a maximum of 1.6
bar, is therefore equipped with two kinds of PO2 alarm:
1 By reaching the limit depth relating to the set PO2 (from
1.0 bar to 1.6 bar), an alarm starts sounding for 15
seconds, while the display starts flashing, showing the
(PO2) icon (picture 17), and, at the left top, the reached set
PO2 limit value.
2 A second alarm will start when the diver reaches the
depth corresponding to a PO2 of 1.6 bar, lasting again for
15 seconds. The display will also flash, the diver must not
go beyond this warring depth limit.
Both alarms will be entered in the Logbook.
Related topics:
• 3.1. - Air dive.
• 3.2. - Hyper-oxygenated Nitrox mixture dive.
• 3.3.1. - Partial pressure setting PO2
• 4.2. - Dive logbook (LOG).
3.4. – Curve dive.
3.4.1. – Ascent rate.
Cressi-sub computer’ s algorithm considers different
ascent rates according to the depth. The rate is shown on
the display by a segmented indicator at the right bottom,
which works according to the following table:
If during surfacing, the maximum allowed ascent rates are
exceeded, the display will show several segments, showing
the ascent rate increasing level. Moreover, an alarm will start
sounding and the display (picture 18) will show a
flashing (SLOW) icon. The segmented indicator will flash as well,
showing the ascent rate and the current depth value.
In this situation, surfacing must be stopped until the (SLOW) icon
disappears and the computer shows its normal display.
DANGER: surfacing too fast dramatically increases the
risk of decompression sickness! Cressi-sub always
recommends a safety stop at the end of each dive, lasting
about 3-5 min at 10-20 ft., which will be assisted by the
computer (see chapter 3.4.2.)
WARNING: do not engage in a follow up dive after a sur-
face interval if the (SLOW) icon has been on! The computa-
tions for the next dive might be invalidated by exceeding
the maximum ascent rate.
EDY.qxd:EDY Manuale2006-2.qxd 20-06-2008 11:51 Pagina 212