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16. Battery Replacement
The IQ-850 uses one CR2032 3v battery.
In order to replace the battery, remove the clear cover with a coin
by unscrewing it in the “open” direction indicated by an arrow on
the cover. Remove the battery and inspect the compartment for
signs of corrosion or water. If you nd signs of corrosion, return
the computer to your authorized TUSA dealer.
Replace the old battery with a new one, taking care that the
polarity is correct. Failure to do so may result in the computer
losing its calibration. Inspect and lubricate the battery
compartment cover O-ring with a thin lm of silicone grease before
replacing it.
Screw the cover back in place in the direction indicated on the
cover. Do not overtighten.
Please note that the warranty does not cover damage to the
computer due to improper battery replacement.
15. Battery Level Icon
Battery level readings are performed in all modes with the exception
of dive mode and PC transfer mode.
If the voltage of the battery drops below 2.7 volts, the low battery icon
will be activated and the icon will blink.
If the voltage is suitable for use and above 2.8 volts, the icon is off.
If the low battery level is detected, the computer will not enter dive
mode. The sound/vibration alarm test will not work when the low
battery icon is on.
39


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