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4. Dive Condition Marks
The dive condition currently set for each of the time modes of the standard mode, the dive plan
display in the dive plan mode and the surface mode is displayed using one of the four types of
marks indicated below.
• Identification of the AIR or NITROX setting for the next dive set in the dive plan mode
• Identification of high-altitude diving automatically set according to the air pressure measured
by the pressure sensor
AIR setting AIR setting and high-altitude diving
NITROX setting NITROX setting and high-altitude diving
* The dive condition mark ( or ) flashes for about 1 hour to warn the diver in the case the watch has
automatically returned to the AIR setting from the NITROX setting.
5. Switching Dive Condition and Setting Oxygen Concentration (O
2
%)
A. NITROX Setting and Oxygen Concentration Setting
(1) The watch switches to the NITROX “Oxygen Concentration Setting State” (display flashes)
when the upper left button (C) is pressed for 2 seconds or more and then released during
the dive condition display (“AIR” display).
(2) Set the oxygen concentration (O
2%) by pressing the lower right button (A) or upper right
button (B).
* Oxygen concentration increased by 1% each time the upper right button (B) is pressed once, and
decreases by 1% each time the lower right button (A) is pressed once. (Oxygen concentration can be
corrected rapidly by continuously depressing either button.)
(3) The oxygen concentration setting is finalized by pressing the upper left button (C) or lower
left button (D) and then releasing.
* Oxygen concentration (O2%) can be set between 22% and 50%.
* If none of the buttons are pressed for about 3 minutes in the oxygen concentration setting state
(display flashing), the flashing oxygen concentration setting is finalized automatically and the watch
changes to the NITROX setting display.
* In the case of changing the oxygen concentration setting after it has been set, reset the oxygen
concentration after first returning to the “AIR” setting display.
B. Switching from NITROX Setting to AIR Setting
After about 30 minutes have elapsed for surface interval time after having performed scuba diving
in the “NITROX” setting, an alarm sounds and the watch automatically returns to the “AIR” setting.
In addition, if scuba diving is not performed for about 6 hours after having set the watch to
NITROX, the watch automatically returns to the “AIR” setting. In the case of returning to the “AIR”
setting after having set the watch to “NITROX”, return the watch to the “AIR” setting by pressing
the upper left button (C) for 2 seconds or more and then releasing during the “NITROX” display.
[AIR]
[Oxygen Concentration Setting State]
[NITROX]
(C) x 2
seconds or
more
Flashes
(C) x 2 seconds or more
(C) or (D)