SUUNTO DX - Manual (Page 56)

Showing the most pessimistic ascent schedule during a long dive can easily result in
the ascent time no longer fitting the reserved field and the dive computer displays "--
-" (max. 999 min).
NOTE
While setting the gases, notice that the calculated maximum op-
erating depth is displayed in the upper field. You cannot change
to this gas before you have ascended above this depth.
In MIXED and CCR OC Gases mode, the default oxygen percentage (O
2
%) setting
is 21% (air) and oxygen partial pressure (PO
2
) setting 1.4 bar.
5.8.3. Setting the Set Point values
In DIVE CCR mode you'll use Set Point menu for adjusting your Low/High Set Point
PO
2
value and Switch High/Low depth.
ADJUST WITH UP AND
DOWN BUTTONS. ACCEPT
WITH SELECT BUTTON.
The default setting for Low Set Point is PO
2
0.7 bar (range 0.4-0.9 bar).
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