SUUNTO Zoop - Manual (Page 45)

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example, 31.8% oxygen should be entered as 31%. Rounding up
will cause nitrogen percentages to be understated and will affect
decompression calculations. If there is a desire to adjust the com-
puter to provide more conservative calculations, use the personal
adjustment feature to affect decompression calculations or reduce
the PO
2
setting to affect oxygen exposure according to the entered
O
2
% and PO
2
values.
NOTE As a safety precaution the oxygen calculations in the computer are
made with an oxygen percentage of 1% + set O
2
% .
DEFAULT NITROX SETTINGS
In the NITROX Mode, when set to standard air (21% O
2
), the instrument can be used
as an air dive computer. It remains in this air mode until the O
2
% setting is adjusted
to any other percentage of oxygen (22% - 50%).
NOTE The computer will automatically revert to the air (21% O
2
) setting
when a new dive series is started, if it is not set to any other mix
during the last two hours. When the oxygen percentage is set for
air, the computer will retain this setting.
Manually entered values for oxygen percentage are retained for about two hours after
the setting if a dive series has not started. In case a dive series is started, the set
value is retained until a new dive series is started or a new value is entered manually.