Oceanic ATOM Operating Manual - page 116

116

SWITCHING GAS MIXES

During No Decompression and/or Decompression dives, the

ATOM can be manually switched from GAS 1 to GAS 2 to GAS

3, changing Pressure related displays and calculations from

Transmitter 1 to Transmitter 2 to Transmitter 3 and/or FO2

displays and calculations from the FO2 value set for GAS 1 to the

FO2 value set for GAS 2 to the FO2 value set for GAS 3.

NOTE: Switching the ATOM from one Gas to

another cannot be performed while on the sur-

face.  Every dive begins with GAS 1.  10 minutes

after surfacing from a multiple gas dive, the

ATOM's operation defaults to the GAS 1 FO2.

Access to Gas Switching screens can only be accomplished

during the time that a Main Dive Display is on the screen and

cannot be performed during the time that an Alarm is sounding.

Gas Changeover Alarm

If a Gas is being used that the ATOM is not set for (i.e., the diver

starts breathing from another Tank and doesn't switch the ATOM

to the new Gas within 60 seconds), the Audible Alarm will sound,

the red LED will flash as a warning, and the message SWCH >

GAS will scroll at the top of the display (Fig. 106) until acknowl-

edged by pressing and releasing the S button momentarily, or the

ATOM is manually Switched to the new Gas being used.

Fig. 106 - Switch Gas Alert