SUUNTO DX - Manual (Page 64)

5.8.11. Setting the air time
In the Air Time setting mode, the remaining air time display can be set "ON" or "OFF"
depending on whether estimated remaining air time display is used or not. Air Time
can only be displayed when the wireless tank pressure transmitter is in use.
ADJUST WITH UP AND
DOWN BUTTONS. ACCEPT
WITH SELECT BUTTON.
5.9. Before diving in the MIXED or CCR mode
If set to the MIXED or CCR mode, the correct oxygen and helium percentage of the
gas in your cylinder(s) must always be entered into the computer to ensure correct
inert gas and oxygen calculations. The dive computer adjusts its mathematical inert
gas and oxygen calculation models accordingly. The dive computer will not accept
fractional percentage values of oxygen and helium concentration. Do not round up
fractional percentages. For example, 31.8% oxygen should be entered as 31%. If you
want to adjust the computer to provide more conservative calculations, use the per-
sonal 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.
Calculations based on nitrox use result in longer no-decompression times and shal-
lower maximum depths than diving with air.
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