18
FO2 MODE
After Activation, the Veo 200/250 will operate as an Air
computer without displaying information associated with oxygen
calculations, unless it is set for a percentage of oxygen (FO2)
other than Air (a numerical value between 21 and 50 %).
When set with an FO2 value of 'Air' (Fig. 10), the Veo 200/
250 will perform calculations the same as if FO2 were set for
21% oxygen, internally accounting for oxygen loading for any
subsequent Nitrox dives. However, oxygen related displays,
warnings, and the O2 Bar Graph will not appear on the display
for that dive, or subsequent dives, unless FO2 is set for a numeri-
cal value (21 - 50).
Once a dive is made with the unit set as a nitrox computer (FO2
set for a numerical value), it cannot be programmed to operate
as an 'Air' computer until 24 hours after the last dive. 'Air' will
not be displayed as an option in the FO2 Mode. However, you
can set FO2 for 21% for use with Air.
When FO2 is set at a value of 21% (Fig. 11), the unit will
remain set at 21% for subsequent nitrox dives until FO2 is set to
a higher value, or until it automatically turns off and is reacti-
vated.
Setting FO2 is described on Page 25.
Fig. 10 - FO2 set for Air
Fig. 11 - FO2 set for 21%
