Bedienungsanleitung Cressi NEWTON (Seite 9 von 23) (Englisch)

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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)

Newton 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 UP button to move up to dive set mode (DIVE-S). Enter in this mode by pressing the Mode button and

the partial oxygen pressure (PO2) indication and the Mix1 indicator will flash. Now press the Mode button

again. 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 UP

or DOWN button. 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 Mode button to return to the main

menu (after another acoustic signal). Alternatively, the computer will modify the automatic setting by issuing an

acoustic signal to return then to the main screen.

Mix2 Partial Oxygen Pressure (PO2) setting.

Press the UP button to move up to dive set mode (DIVE-S), enter in this mode by pressing the Mode button.

The indication of the partial oxygen pressure (PO2) and the Mix1 indication will flash. Press the UP button

twice. The word Mix2 will appear together with the PO2 value. Now press the Mode button again. 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 UP or DOWN button.

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 Mode button to return to the main menu (after

another acoustic signal). Alternatively, the computer will modify the automatic setting by issuing an acoustic

signal to return then to the main screen.

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.

NITROX – PERCENTAGE OF OXYGEN (FO2)

The percentage of oxygen FO2 can be changed only when the computer is set in SET NITROX MODE. With

this setting you can decide the type of dive: with air (Dive Air Program), with fraction of oxygen at 21%, or using

one or two Nitrox hyper-oxygenated mixtures (Dive Nitrox Program).

Mix1 percentage of oxygen (FO2) setting

To set the correct percentage of Oxygen contained in the Nitrox mixture, press the UP button to move up to the

DIVE-S mode. Enter in this mode by pressing the Mode button. The indication of the partial oxygen pressure

(PO2) and the Mix1 indicator will flash. Press the UP button. The indicator of the percentage/fraction of oxygen

(FO2) will flash. Press the Mode button. The display will show just the highlighted item (FO2), flashing together

with the corresponding maximum operating depth that can vary by pressing the UP or DOWN button of the

device. Once the desired setting is reached (values between 21% and 50% with variations of 1% of O2),

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 Mode button to return to the main menu (after

another acoustic signal). Alternatively, the computer will modify the automatic setting by issuing an acoustic

Po2 MIX1 - PARTIAL OXYGEN PRESSURE SETTING MIXTURE 1

PO2 MIX2 - PARTIAL OXYGEN PRESSURE SETTING MIXTURE 2

INDEX

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