Page 53
Doc. 13301-Tec-RevB (2022-05-25)
Technical Modes
Operating Instructions
Select Gas
This menu item allows you to
pick a gas from the gases you
have created� The selected
gas will be used either as the
breathing gas in open circuit
and bailout modes, or the
diluent in closed circuit mode�
By default, the Classic gas
select menu is enabled�
From left to right, each gas
shows gas number, circuit
mode (OC or CC), on or off,
the fraction of oxygen then the
fraction of helium�
Gases are always sorted from
most to least oxygen content�
Use the left (Next) button
to increment to the desired
diluent/gas, then press the
right (Select) button to select
that diluent/gas�
An ‘A’ will appear next to the currently active gas�
This is the gas being used for tissue compartment
updating�
A gas that is off will be shown in
Magenta
, but can still
be selected� It will be turned on automatically if it is
selected�
Gases that are turned off are not used in
decompression calculations� All gases that are turned
on will be used in decompression calculations as
appropriate� See the Decompression Information
Accuracy section on page 29 for more information�
If you increment past the number of gases available,
the display will fall back out of the “Select Gas”�
Radio Station Gases
For closed circuit mode, the system maintains two
sets of gases - one for open circuit (bail out), and one
for closed circuit�
The way they operate is very similar to the way car
radios work with AM and FM stations�
When you are listening to an FM station and you push
a station selection button, it will take you to another
FM station� If you add a new station, it will be an FM
station�
Similarly, if you are in the AM mode, adding or
deleting a station would add or delete an AM station�
With radio station gases, when you are in open
circuit, adding, deleting or selecting a gas will refer
to an open circuit gas� Just like the FM stations are
selected when your radio is in FM mode, the closed
circuit gases are available in the closed circuit mode�
When you switch to open circuit, the gases available
will be open circuit gases�
SURFACE
Select Gas
0.0
DEPTH
TIME
.21
PPO2
2
h
45
m
Select Gas main menu
A1 OC On
0.0
21/00
Select
Next
SURFACE
DEPTH
TIME
.21
PPO2
2
h
45
m
Gas 1, Active Gas, 21% O2
2 OC On
0.0
50/00
Select
Next
SURFACE
DEPTH
TIME
.21
GasPO2
2
h
45
m
Gas 2, Turned on, 50% O2
3 OC
Off
0.0
18/50
Select
Next
SURFACE
DEPTH
TIME
.21
GasPO2
2
h
45
m
Gas 3, Turned Off, 18% O2, 50% He