Oceanic VT 3, Operating Manual

Page: 101 / 164

101
HIGH OXYGEN ACCUMULATION
The O2 Bar Graph (O2BG) displays either oxygen accumulated
during that nitrox dive, or during the repetitive nitrox dives you
conduct during that 24 hour period, whichever of the two is
greater at that time. The O2BG allows you to monitor how close
you are coming to the limits of oxygen exposure.
If the theoretical amount of oxygen accumulated equals, or
exceeds, the limit for a single exposure, or the exposure limit for
a 24 hour period (300 OTU), Oxygen Dive Time Remaining
becomes 0:00 (hr:min), the graphic O2 appears and the full O2
Bar Graph and UP Arrow will be displayed flashing (Fig. 86).
The red LED warning will flash, the Audible Alarm will sound,
and the message HIGH > O2 will scroll at the top of the display.
When the Alarm is acknowledged/silenced, the message UP >
HIGH > O2 will scroll until the level of oxygen decreases below
the limit.
• Press/release the A button to view the Alternate displays.
> The unit will revert to the MAIN Display after 5 seconds.
Upon surfacing during a High O2 Alarm condition, operation
will lock into NORM Mode, blocking access to GAUG and
FREE, until the O2BG recedes to 4 segments.
Fig. 86 - HIGH O2 MAIN
A chart listing the
NOAA O2 limits
is provided on
page 151.