Cochran Nemesis IIa NITROX, User Manual

Page: 39 / 79

39
AUDIBLE & VISUAL WARNINGS
In this chapter you will learn to recognize the audible and visual warnings that your dive
computer may issue to alert you of a potentially hazardous condition.
User Defined Maximum Depth:
During the Predive Prediction Mode, you have the ability to define a maximum depth to
which you wish to dive. When the desired maximum depth is displayed during the
Predive Prediction Mode, tap the TU on the circular cross-hatched are identified by
"PWR". Three confirmation beeps will be issued. You may also set this depth via the
optional Analyst personal computer interface. Should you descend to a depth deeper
than your selected maximum depth, the DEPTH digits will flash and once every minute,
the five-chirp audible alarm will sound. The factory setting for this warning is 320 feet.
NOTE: The Depth Alarm is disabled during the Emergency Decompression Mode.
1/2 Tank Pressure Alarm:
When you have consumed one-half of the cylinder's "usable" pressure, your dive
computer will issue a one time five-chirp audible alarm. If you use all of the "usable"
tank pressure, you will still have a safety reserve of 500 psi. The point at which the 1/
2 Tank Pressure Alarm will sound is easily determined by using the following formula:
( TP - 500)
TP = 1/2 Tank Pressure Alarm limit
2
Where: TP = beginning tank pressure
For example, let us say you started your dive with a tank pressure of 2500 psi.
(2500 - 500)
2500 = 1500 psi
2
The 1/2 Tank Pressure Alarm would sound at 1500 psi This warning is disabled
when shipped from the factory. You can enable this option via the Analyst.
Low On Air:
Should you approach 500 psi of pressure remaining in your SCUBA tank or five min-
utes or less of remaining air time, your dive computer will:
Issue a one time, five-chirp audible warning - and
Flash both the WARNING legend and the TANK digits
If you should ever have less than five minutes of remaining air time, your dive com-
puter will also illuminate the AIR legend on the WU.
The flashing of the WARNING legend and the digits under the TANK legend will con-
tinue until the Air Time Remaining is increased to at least ten minutes. This may be
accomplished by ascending to a shallower depth. This is not a settable alarm.