Specifications

500AI

FO2 50% Default

If the Default is set to 'On' and FO2 is set to a value 'greater than 21%', the

FO2 set point value will automatically revert to 50% 10 minutes after that dive

(Fig. 31). The Maximum Depth that can be achieved with an oxygen partial

pressure (PO2) of 1.60 ATA will also be displayed.

• FO2 must therefore be reset for each repetitive nitrox dive, or the value

will automatically 'default' to 50 and the dives will be calculated based on

50% O2 for oxygen calculations and 21% O2 (79% nitrogen) for nitrogen

calculations.

WARNING: If you surface for greater than 10 minutes during a

dive, a subsequent descent will be considered a new dive and

the FO2 value must be reentered.

If the Default is set to 'Off', the FO2 value for repetitive dives remains the

same until the FO2 set point is manually changed.

WARNING: Even if the Default is set OFF, the FO2 setting

must be verified to match the percentage of oxygen (FO2) in

the nitrox mix being used 'before each nitrox dive'.

Fig. 31 - FO2 50% Default

MAX