22
3.
Fraction of Oxygen (FO
2
)—The IQ-600 will display its current
FO
2
setting in one of three ways:
FO
2
NOT SET—If your IQ-600’s FO
2
setting has defaulted,
a series of horizontal bars appears. Again, see page 00 for
a more extensive discussion of why, when and how your
IQ-600’s FO
2
setting defaults.
FO
2
SET TO AIR—If you have set your
IQ-600
’s FO
2
to a
value of 21percent, the word
Air
will appear and the
percent sign,
FO
2
and
Nitrox
notations
will not
appear.
FO
2
SET TO EAN22–EAN50—The FO
2
percentage appears,
along with the percent sign, FO
2
and Nitrox notations.
4.
Altitude Rank—
Current Altitude Rank (just as in Surface Mode).
5. Mode Indicator—The Mode Indicator will point to PLAN.
In addition to this data, if your IQ-600 determines that there is
residual nitrogen present from previous dives, it will also dis-
play Surface Interval Time and its Residual Nitrogen Bar Graph
during Dive Plan Mode—just as it does during Surface Mode.
Similarly, if the IQ-600 determines that the cumulative effect of
exposure to elevated PO
2
s from prior dives is significant, the
Oxygen Limit Index (OLI) will appear while in Dive Plan
Mode.
