4 GASES
4.1 Compressed air
This device is recommended for use with compressed air. The compressed air
supply must comply with the quality of compressed air specified in the EU standard
EN 12021:2014 (requirements for compressed gases for breathing apparatus).
4.2 Enriched Air Nitrox diving use
This device can be used with nitrox breathing gases (also known as oxy-nitrogen).
WARNING: Do not use nitrox gas mixtures if you do not have proper training.
Appropriate training courses about nitrox and oxygen diving are essential prior to
the use of this kind of equipment with oxygen content greater than 22%.
WARNING: In nitrox use, the maximum operating depth and exposure time are
dependent on the oxygen content of the gas.
WARNING: There is a danger when using nitrox that contaminants may give rise
to an oxygen ignition.
WARNING: The use of breathable air according to EN 12021 may contaminate
the diving apparatus.
NOTE: To minimize the risk of oxygen ignition, pressure vessel valve(s) should
always be opened slowly.
4.3 Oxygen calculations
The oxygen calculations are based on currently accepted exposure time limit
tables and principles.
By default in Air/Nitrox dive mode, CNS% and OTU values are not displayed until
they reach 80% of their recommended limits. When either value reaches 80%,
Suunto D5 notifies you and the value stays in the view.
• Audible alarm when pO2 value exceeds the preset limit (pO2 high alarm)
WARNING: WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE
MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY TAKE ACTION TO
REDUCE OXYGEN EXPOSURE. Failure to take action to reduce oxygen exposure
after a CNS%/OTU warning is given can rapidly increase the risk of oxygen toxicity,
injury, or death.
NOTE: You can customize views to always show CNS% and OTU.
5 OPERATING CONDITIONS
• Normal altitude range: 0 to 3000 m (0 to 9800 ft) above sea level
• Operating temperature (diving): 0 °C to 40 °C (32 °F to 104 °F)
• Operating temperature (non-diving): -20 °C to +50 °C (-4 °F to +122 °F)
• Storage temperature: -20 °C to +50 °C (-4 °F to +122 °F)
NOTE: Do not leave the dive computer in direct sunlight!
• Recommended charging temperature: 0 °C to +35 °C / +32 °F to +95 °F
• Maintenance cycle: 500 dives or two years, whichever comes first
WARNING: Do not expose the device to temperatures above or below the given
limits, otherwise it might get damaged or you might be exposed to safety risk.
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