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DIVE-SET MODE: Diving parameters setting.
Once the MODE SET (MODE-S) menu is set in AIR or NITROX mode you can modify the parameters by
accessing the next menu DIVE SET (DIVE-S).
IMPORTANT: If the screen displays the battery icon with a single segment on, the computer MUST NOT
be used. The battery can be replaced by the user, as we shall see in the corresponding chapter.
IMPORTANT: Once changing from NITROX SET MODE to AIR SET MODE, the parameters of both Mix1
and Mix2 return to the values 21% (FO2) and 1.4 bar (PO2).
PARTIAL OXYGEN PRESSURE (PO2)
Giotto is factory set with a Partial Oxygen Pressure (PO2) value of 1.4 bar both for the air dives and Nitrox
dives with one or two mixtures (Mix1 and Mix2) in order to ensure the maximum safety during any type of
dive. However, the PO2 can only be modified if the computer is set in NITROX SET MODE in values
between 1.2 bar (included) and 1.6 bar (included) with variations of 0.1 bar. In case you need to increase
the safety margin of the dive, it will be possible to set PO2 to lower values, up to a minimum of 1.2 bar.
Mix1 Partial Oxygen Pressure (PO2) setting.
Press the right (>) button to move up to dive set mode (DIVE-S). Enter in this mode by pressing the central
button (Mode) and the partial oxygen pressure (PO2) indication and the Mix1 indicator will flash. Now
press the central Mode button. The display will show just the highlighted item, flashing together with the
corresponding maximum operating depth. Set the desired values (between 1.2 and 1.6 bar, with variations
of 0.1 bar) by pressing the right or left button (> or <). Confirm the value set by keeping the Mode button
pressed for a few seconds until hearing an acoustic signal to confirm exit from the menu. Keep pressing
and holding the central button to return to the main menu (after another acoustic signal) and if it is still on,
the computer will shut down. Alternatively, the computer will modify the automatic setting by issuing an
acoustic signal to return then to the main screen, and then it will automatically shut down.
Mix2 Partial Oxygen Pressure (PO2) setting.
Press the right (>) button to move up to dive set mode (DIVE-S), enter in this mode by pressing the central
button (Mode). The indication of the partial oxygen pressure (PO2) and the Mix1 indication will flash. Press
the right (>) button twice. The word Mix2 will appear together with the PO2 value. Now press the central
Mode button. The display will show just the highlighted item, flashing together with the corresponding
maximum operating depth. Set the desired values (between 1.2 and 1.6 bar, with variations of 0.1 bar) by
pressing the right or left button (> or <). Confirm the value set by keeping the Mode button pressed for a
few seconds until hearing an acoustic signal to confirm exit from the menu. Keep pressing and holding the
central button to return to the main menu (after another acoustic signal) and if it is still on, the computer will
shut down. Alternatively, the computer will modify the automatic setting by issuing an acoustic signal to
return then to the main screen, and then it will automatically shut down.
IMPORTANT: the computer maintains the PO2 setting until it is manually reset by the diver on different
values or until the MODE-S menu is set in AIR.
REMARK: By varying the maximum PO2 set and the percentage of oxygen in the FO2 mixture, the
computer indicates the maximum depth which may be reached.
IMPORTANT: The PO2 is set by the manufacturer on the default value of 1.4 bar, for both air dives and
Nitrox dives. This way, the safety of the diver is ensured by following the most conservative values
recommended for sport dives. However, you can select another PO2 value, as indicated in the chapter on
Nitrox dives. The value set will be saved in the computer until the diver resets it or until the MODE-S menu
is set in AIR.
MIXTURE 1- PO2 MIX1 PARTIAL OXYGEN PRESSURE SETTING
MIXTURE 2- PO2 MIX2 PARTIAL OXYGEN PRESSURE SETTING
LONG
LONG
LONG
LONG
LONG
MODE
MODE
MODE
MODE
MODE
BEEP
BEEP
LONG LONG LONGLONG
MODE MODE MODEMODE
LONG LONG LONGLONG
MODE MODE MODEMODE
LONG
MODE
OF
F
LONG
MODE
INDEX
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7


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