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Note that the CNS O
100% alarm can be activate during a dive (see chapters CNS O
CNS O
2
information), whereas the remaining CNS O
mid-section of the bottom row (4% in below example).
The CNS O
clock increases when the oxygen partial pressure is higher than 0.5bar, and decreases when the
2
oxygen partial pressure is lower than 0.5bar. Hence, while on the surface breathing air you will always be decreasing
the CNS O
clock. During the dive, the depth at which 0.5bar is reached for various mixes is as follows:
2
• Air: 13m/43ft
• 32% O
: 6m/20ft
2
• 36% O
: 4m/13ft
2
F
NOTE: For oxygen concentrations of 80% and higher, the ppO
3 .19 Diving with multiple gas mixtures
The LUNA 2.0 AI is equipped with the ZH-L16 ADT MB PMG algorithm. PMG stands for Predictive Multi-Gas,
meaning that when you program more than one gas mixture, the LUNA 2.0 AI will predict the switch to the
higher oxygen concentration gas at the depth that you specified and alert you at all times with a comprehensive
decompression schedule of all the gas mixtures that you programmed.
In other words, you get full credit at any point during the dive for all the extra gas mixtures that you are carrying
with you.
NOTE: See chapter Enabling predictive multi-gas mode (PMG) to learn how to enable this mode on your
F
LUNA 2.0 AI.
VERY IMPORTANT!
Diving with multiple gas mixtures represents a much higher risk than diving with a single gas mixture, and mistakes by the
diver may lead to severe injury or death.
During dives with multiple gas mixtures, always make sure you are breathing from the tank that you intend to use. Breathing
from a high oxygen concentration mix at the wrong depth can kill you.
Mark all your regulators and tanks so that you cannot confuse them under any circumstances.
Before each dive and after changing a tank, ensure that each gas mixture is set to the correct value for the corresponding tank.
Get the proper training and certifications to make multi-gas dives prior to making them by yourself.
The LUNA 2.0 AI enables you to use up to 3 gas mixtures during the dive.
For oxygen concentrations of 80% and higher, the ppO
The MOD for tanks 2 and 3 are the switch depths for those gases. This is what the LUNA 2.0 AI uses for its calculations,
warnings, and suggested switch points.
When diving with more than 1 gas mixture, the nitrox reset time function (described in the chapter Nitrox reset time) has the
following effect: gas 1 is set to 21%, gases 2 and 3 are set to OFF.
Start breathing from the tank with the new gas mixture before confirming a switch. Always make sure you are switching to the
intended gas. Failure to do so may result in severe injury or death.
The following sections about gas switching are shown with 2 gas mixtures enabled. However, more than two mixes
enabled are working similarly.
LUNA 2.0 AI USER MANUAL
clock is independent of the value of ppO
2
value after a dive is shown in the current dive settings display in the
2
max set by the user. CNS O
2
= 75% and CNS O
2
max is fixed at 1.6bar and cannot be changed.
2
WARNING
max is fixed at 1.6bar and cannot be changed.
2
WARNING
75% warning and
2
= 100% for more
2
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