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GALILEO 2 TEK (G2TEK) USER MANUAL
The minimum O
2
setting for tank T1 is
18%. This is due to the limitation that a
dive must begin with gas 1. To ensure an
adequate supply of oxygen to the body,
the gas used at the beginning of the dive
must contain enough oxygen (you can use
a travel mix or one of the decompression
gases) as is required for Tank 1. Therefore,
the first alarm related to Absolute Minimum
Depth would be given at shallower than
1.2m/3.9ft.
WARNING
Heavy work while at the surface or at shallow
depths while breathing with less than
21% oxygen fraction may cause a loss of
consciousness and lead to drowning.
The minimum O
2
setting for other tanks
than tank 1 is 8%.
WARNING
Low Oxygen fraction settings may allow
greater MOD values. The dive computer cannot
evaluate your skills, experience or condition to
dive the MOD which is showing. Dive only at
depths that your certification allows.
The G2TEK calculates the maximum
possible helium fraction by subtracting the
oxygen fraction from 100%.
WARNING
Helium reduces the narcotic effect of the mix, but
does not remove it. At great depths, helium may
also cause an effect called “Helium tremors” or
HPNS (High Pressure Nervous Syndrome).
The gas summary table is practical when
handling multiple gas mixtures. It can be
called up on a pre-dive check as well as
any time during the dive.
F
NOTE: The Smart transmitter
communicates the pressure signal
frequently only from the actively used
tank. When the tank is not used within
5 minutes, the transmitter goes to a
power save mode and the pressure
update to a gas summary table may
take longer.
Compartment saturation with Trimix
In Trimix mode the compartment saturation
shows combined both helium and
nitrogen saturations separated by a thin
line. On-gassing and off-gassing of the
compartments are indicated the same way
as with a color change.
