Cochran Nemesis IIa NITROX, User Manual

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There are factors which can significantly vary battery operating life. These include:
·
Original quality of battery as manufactured.
·
Age of battery prior to installation.
·
Length of time batteries have been installed.
·
Frequency and cumulative number of WARNINGS issued by the computer.
·
Temperature of battery in operation.
Fresh batteries installed in the TU will read about 6 volts. At 5.4 volts the low battery
indicator is shown on the WU. At 4.8 volts, your TU will not turn on. If you have the
optional TACLITE display, battery life in the WU will be affected depending upon the
number of times you activate the TACLITE. On a new, fresh set of N-type batteries in
the Wrist Unit, you should get approximately 10,000 TACLITE cycles. See your Autho-
rized Dealer for a demonstration of the TACLITE active backlight display.
To replace batteries:
a) Prepare four new AA alkaline batteries (NO Lithiums)
b) Double check the orientation of batteries with the picture on the bottom of the
battery tubes
c) Remove one battery cap, replace batteries, re-install battery cap carefully mak
ing sure not to cross-thread the battery cap
d) Wait one minute
e) Remove other battery cap, replace batteries, re-install battery cap making
sure not to cross-thread the battery cap.
NOTE: The one minute delay allows the power circuit responsible for maintaining
power to the TU during a battery change, time to recharge.
Battery Care
Two separate, sealed TU battery compartments isolate the alkaline batteries from the
main computer. Gases given off by the chemical reaction that produces electricity within
batteries react with the metal contacts of the batteries, causing corrosion. Over time,
this coating accumulates and lowers the amount of power the battery can deliver. Even
though batteries that have been in the dive computer for a period of time may indicate
ample voltage, the corrosion interferes with delivery of power from the battery to the dive
computer. Preventive maintenance in the form of the periodic burnishing of the battery's
contacts and applying a thin film of silicone grease to the battery terminals will greatly
minimize this corrosion from forming.
NOTE: It is always advisable to replace older or questionable TU batteries with
new, fresh batteries before a long series of dives, especially if your dive computer
has been inactive for an extended time.
NOTE: Remember, your TU cannot be manually turned off; and since the TU
computes all of the diving data, turning your WU off will not affect your decom-
pression information. Residual nitrogen elimination, as well as time-to-FLY can be
viewed by turning the WU back on.