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Tissue calculation model:
• Suunto RGBM algorithm (developed by Suunto and Bruce R. Wienke, BSc, MSc,
PhD)
• 9 tissue compartments
• Tissue compartment halftimes: 2.5, 5, 10, 20, 40, 80, 120, 240 and 480 minutes
(on gassing). The off gassing halftimes are slowed down
• Reduced gradient (variable) "M" values based on diving habit and dive violations.
The "M" values are tracked up to 100 hours after a dive
• The EAN and oxygen exposure calculations are based on recommendations by
R.W. Hamilton, PhD and currently accepted exposure time limit tables and prin-
ciples.
Battery:
• One 3 V lithium battery: CR 2450
• Battery storage time (shelf life): Up to three years
• Replacement: Every three years, or more often depending on dive activity
• Life expectancy at 20°C/68°F:
• 0 dives/year –> 3 years
• 100 dives/year –>2 years
• 300 dives/year –>1.5 years
The following conditions have an effect on the expected battery lifetime:
•
The length of the dives
•
The conditions in which the unit is operated and stored (for example, temperat-
ure/cold conditions). Below 10°C/50°F the expected battery lifetime is about 50-
75% of that at 20°C/68°F.
•
The use of the backlight and audible alarms
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