SUUNTO EON STEEL - Manual (Page 38)

By default the decompression algorithm used in Suunto EON Steel is
Suunto Fused™ RGBM. For more information about the algorithm,
see
3.23 Suunto Fused RGBM .
Gauge is a bottom timer mode and thus has no decompression
information or calculation included.
NOTE: After diving in gauge mode, decompression calculation is
locked for 48 hours. If during this time you dive with Air/Nitrox or
Trimix mode, there is no decompression calculation available and
ERROR is shown in decompression information fields.
3.14 Gas mixtures
If Nitrox or Trimix dive mode is selected, you need to define the
gas(es) for the decompression algorithm to work properly. You
define the gases under Menu / Gas(es). In Nitrox mode, gas will
have only oxygen (O2%). Trimix mode has helium (He%) available,
and there is also the possibility to choose multiple gases.
NOTE: When you have analyzed your gas, you should round the
result down when entering it for EON Steel. For example, if the
analyzed gas is 31.8% oxygen, then define the gas as 31%. This
makes the decompression calculations safer. Oxygen calculations
(pO2, OTU, CNS%) are also kept conservative, since the oxygen
percent used for those are O2% + 1.
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