16
One of the greatest benefits of this symbolic representation of
nitrogen levels during surface intervals is that it helps you
decide
how long to wait before reentering the water. For example,
should you elect to make a repetitive dive when there are more
than just a few pixels appearing, you will discover that your
available no-decompression dive time ends up being very short.
Thus, it makes sense to wait until fewer pixels appear, and you
can enjoy longer bottom times with a greater margin of safety.
8.
Oxygen Limit Index (OLI)—This is a column of up to eight
circular pixels representing the cumulative effect of your
exposure to elevated partial pressures of oxygen (PO
2
s).
Eight pixels is roughly equivalent to having used up 100
percent of the theoretical “CNS Clock” you learned about
during your initial Nitrox Diver training. The number of
pixels displayed will tend to increase during dives and de-
crease during surface intervals. When more than 24 hours
has passed since surfacing from your last dive, the last OLI
pixel should disappear.
9. Mode Indicator—This should point to the abbreviation
SURF when in Surface Mode.
When the Low Battery symbol appears and is blinking, the
IQ-600 will enter Transfer Mode, but cannot enter Dive Mode.
When the Low Battery symbol appears and stops blinking, the
IQ-600 cannot enter either Transfer or Dive Mode.
The battery that comes with your IQ-600 is designed to last
up to 18 months or more under normal use. Several factors
may affect battery life; therefore, do not be surprised if you
get significantly more or less use from your IQ-600’s battery.
