Operation Manual

37
If you find yourself in Deco Stop Violation, descend to or
below the indicated stop depth and remain for the time
shown. If conditions make this impossible, make your stop
between 3-7 ft/1-2m, and remain there until the IQ-600
returns to Dive Mode (this may take considerably longer
than the display suggests it will).
You should also be aware that, during a Deco Stop Viola-
tion, the IQ-600’s Ascent Rate Warning does not function.
However, in so far as the correct response to a Deco Stop
Violation involves not only slowing your ascent, but revers-
ing it, the problem is self-correcting.
If you cannot correct an indicated Deco
Stop Violation, the warnings will contin-
ue for five minutes after surfacing. At this
point, the computer will not be usable for
the next 24 hours.
 PO
2
Warning—As mentioned earlier, your IQ-600 uses a
value of 1.6 atmospheres as its absolute limiting PO
2
.
When the computer detects that a combination of depth and
FO
2
put you within 90 percent of this limit, the computer’s
audible alarm sounds for three seconds and its PO
2
LIMIT
and current depth, shown in Figure 12, will blink for three
seconds.
If you continue your descent and reach a depth at which
the PO
2
equals or exceeds 1.6 atmospheres, the audible
alarm will again sound for three seconds, and the PO
2
LIMIT and current depth will again blink and continue
blinking until you ascend to a safer depth.