Specifications

FO2 MODE

After Activation, the ATMOS

will operate as an Air computer with-

out displaying information associated with oxygen calculations, un-

less it is set for a percentage of oxygen (FO2) other than Air (numeri-

cal value between 21 and 50 %).

NOTE: Setting FO2 is described on Page 27.

When set with an FO2 value of 'Air' (Fig. 6), the ATMOS

will

perform calculations the same as if FO2 were set for 21% oxygen, in-

ternally 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 numerical value (21 - 50).

Once a dive is made with the unit set as a nitrox computer (FO2 set

for a numerical value), the unit 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. 7), 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 reactivated.

Fig. 6 - FO2 Air

Fig. 7 - FO2 of 21%