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OXYGEN FRACTION MIXTURE 1 SETTING- FO2 MIX1
OXYGEN FRACTION MIXTURE 2 SETTING- FO2 MIX2
signal to return then to the main screen.
REMARK: The percentage of oxygen FO2 set in the Mix1 is between 21% and 50%.
Mix2 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 indication will flash. Press the UP button three times until you see the word Mix2 flashing
and the indicator of the Mix2 percentage/fraction of oxygen. 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 DOWN or UP button of the device. Once the desired setting is reached (values between 21%
and 99% 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 signal to return then to the main screen.
REMARK: The percentage of oxygen FO2 set in the Mix2 is between 21% and 99%.
REMARK: The Newton computer is factory set on the MODE-S AIR dive program (air with PO2 1, 4). To be
able to access the Nitrox parameters you need to set the MODE-S menu in position NITROX. Mix1 and Mix2
contain FO2 at 21% and the PO2 at 1.4 factory set by default.
REMARK: If the computer is set in NITROX MODE-S and the default values of MIX1 and MIX2 are modified,
such values remain set and active until it is changed to MODE-S AIR. In this case these values will restart from
the default values.
REMARK: By varying the FO2 the computer indicates the maximum depth which may be reached with that
mixture, depending on the PO2 value set.
It is possible to change the setting of the Nitrox mixture also during the surface interval (with desaturation in
progress), but only after 2 minutes from the start of the interval.
This is a very important feature, especially for divers who perform a series of subsequent dives, which allows
them to change the mixture after having dived without having to wait for complete desaturation.
IMPORTANT: Once the percentage of oxygen FO2 is set, it remains active and memorised in the computer
until it is modified again or until the MODE-S menu is set in AIR.
DANGER: With the NITROX MODE-S Newton always keep the last percentage of oxygen set. It is very
important for the diver's safety to always check this parameter before each dive.
DANGER: If you perform a repetitive dive after a Nitrox dive, it is fundamental for one's safety to check
the type of mixture contained in the cylinder and to set the FO2 of the computer according to that
mixture.
DANGER: Do not dive with cylinders containing nitrox mixtures whose percentages of oxygen have
not been personally checked.
DIVE SAFETY FACTOR (SF)
The safety factor is an additional parameter whose purpose is to make dives safer based on the existence of
personal risk factors which increase the risk of decompression sickness. The diver can set it on three values:
SF0/SF1/SF2. The factory setting is SF0, i.e. disabled.
To change the Safety Factor (SF) press the UP button up to the DIVE-S mode. Enter in the menu by pressing
the Mode button. Scroll with the UP or DOWN button until the SF0 indicator stops flashing.
Press the Mode button and change the element with the UP or DOWN buttons. 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: Enable and set a higher factor (SF2/SF3) whenever you are aware of conditions which may
increase the risk of decompression sickness. In this way, the non decompression times will be shorter as well
as the dive which will also be more conservative, ensuring greater safety.
INDEX
10
LONG
LONG
BEEP
BEEP
AUTOMATIC
RETURN OR
WITH LONG
MODE BUTTON
BEEP
10


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