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Diving with 2 or 3 gas mixtures
4.10 Diving with 2 or 3 gas mixtures
Bottom mix, gas 1
Time
Switching
depth
(MOD
gas d)
Switching
depth
(MOD
gas 2)
Travel mix, gas 2
Depth
Deco mix (gas d)
The following chapter deals with the characteristics of diving with 2 or 3 gases. In case of using 2
gas mixtures (gas 1 and d), just ignore the parts describing the gas 2.
When diving with multiple gas mixtures, the tank pressure at XP-3H display remains always the one
where it is connected by the hose.
Subgear XP-3H enables you to use up to 3 different Nitrox mixtures during the same dive. Tank 1
contains the bottom mix (gas 1), tank 2 the travel mix and tank d contains the deco mix (gas d).
Switching the deco gas option on and off
In order to enable two- or three gas diving you must turn on the deco gas option in the SET 1 menu
->69.
Setting the gas mixture and the depth for changing the gas mixture
21 d
O
2
fraction
Range of O
2
fraction
100%
21%
During dives with 2 or 3 gas mixtures the bottom mix (gas 1) contains the lowest and gas d the highest
fraction of oxygen.
Subgear XP-3H will only accept settings corresponding with this order.
WARNING
For gas mixtures having an oxygen percentage of 80% or greater the ppO
2
is xed at 1.6 bar and cannot be altered
in any way.
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