off gassing until all residual nitrogen is eliminated. The current Surface Interval and
PreDive Predictions can be viewed by turning the unit back on.
OXYGEN TOXICITY FACTORS:
The
CO
has the ability to track Oxygen
Toxicity levels for the Central Nervous System (CNS) as well as the Mission Oxygen
Tolerance Units Dose (OTU). In addition, a maximum Partial Pressure of Oxygen (PO2)
warning alarm can also be set. While most other audible alarms of the dive computer
consist of five long beeps, the CNS, OTU, and PO2 have a distinctive audible alarm that
consists of short double-beeps that sound once per second for five seconds.
As long as one or more of these three parameters is outside its limits, the “WARNING”
legend on the display will continue to flash and the audible alarm will be repeated once
per minute.
None of these three functions are active if the NITROX capability is not enabled or has
been disabled via the
Analyst
®
PC Interface (see later description of the
Analyst
®
).
PARTIAL PRESSURE OF OXYGEN (PO2):
High PO2 levels can cause severe Oxygen
poisoning. Widely different levels of PO2 can affect individual divers. The user via the
Analyst
®
can set the PO2 alarm to any level between 0.50 ATA and 1.60 ATA. As
shipped from the factory, this is set to 1.60 ATA.
Should the PO2 be above the alarm set point, the audible alarm will sound and the
“MAX DEPTH” digits will be replaced with a “P” followed by the two-digit PO2 value with
decimal point.
15
CENTRAL NERVOUS SYSTEM (CNS) TOXICITY:
Should the CNS Toxicity reach 50%
of the maximum allowable, the audible alarm will sound and the “MAX DEPTH” digits
will be replaced with a “C” followed by the two digit CNS percentage. All three of these
digits on the display will be flashing along with the “WARNING” legend.
