25
If the buttons are held longer and SET 1 and 2 are both by-
passed, the unit will go to Simulator Mode which is described
on page 75.
While in the Set Mode, if neither button is pressed during a pe-
riod of 2 minutes, the unit will revert to Surface Mode.
ENTERING SETTINGS - SET MODE #1
TO SET - FO2
(while in the Surface Mode)
Factory set for Air, FO2 can also be set to values between 21 and
50% in increments of 1%. FO2 defaults to the Air setting when-
ever the ATMOS 2 shuts off.
Press Both buttons simultaneously, release when
SET: 1
ap-
pears.
Press and release the Advance (Front) button,
FO2
appears
with the value flashing (Fig. 20).
Press and release the Select (Side) button to increase the FO2
value 1% per second from 21 to 50%, then display 'Air' again; or
Press and hold the Select (Side) button to scroll from Air to
32%, then press and hold again to scroll from 32 to 50%, then
Air .
For each FO2 value that appears, the lower display indicates the
Maximum Depth that can be achieved for a PO2 of 1.60 ATA
(Fig. 21). If FO2 is set for Air, the lower display is blank.
Fig. 20 - Set FO2
Fig. 21 - FO2 = 32%
