Dive Computer
User Manual
Liquivision Products, Inc
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44
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Revision 3.2 Software 2.58
When it is “On”, your XEO will automatically switch gas to the Best Gas (see below, in
Gas Settings
),
as long as following criteria are met:
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There is a Best Gas (that is, there is at least one gas that is breathable at your depth)
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And gas Manual Override is “Off”.
Gas Manual Override Concept
Gas Manual Override is a feature that makes sure your XEO will not stubbornly switch your gas
to the Best Gas for your current depth, even though you switched gas manually to another gas.
Normally, according to the Best Gas concept, the Auto Switch would switch you to your Deco Gases
when you start the dive, until you exceed their respective MODs. Similarly, if you were to switch gas
manually, the Auto Switch would try to switch you back to your Best Gas.
To prevent this, we created Manual Override, which turns on every time you start a dive or switch gas.
The Manual Override turns off once you reach a depth where the gas you are actually breathing
becomes the Best Gas.
Here are some examples:
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If you start your dive with the Default Gas being Air, and a couple of Nitrox mixes as Deco Gases,
Manual Override will be on. Manual Override will prevent your XEO's Auto Switch from switching
you to any gas other than Air on your way down, until you reach the depth where only Air is
breathable, i.e. where Air is the Best Gas.
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If you decide to switch to your first Deco Gas on a decompression stop slightly deeper than the
MOD of that gas, your XEO will let you do so manually (although it will display a high PO2
warning). It will not switch you back to Air, because Manual Override will be in place. When you
ascend to the depth where that Deco Gas is breathable, i.e. where it is considered the Best Gas,
Manual Override will turn off. This way, when you reach depth where the next Deco Gas is
breathable, Auto Switch will switch you to that gas.
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If you decide NOT to switch to your first Deco Gas at the XEO-calculated switch depth, and your
Auto Switch is on, you will have to wait until XEO switches automatically to the Deco Gas before
you can switch back manually to your Dive Gas (thus activating Manual Override).
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Once you are ready to switch to your Deco Gas, you will have to do so manually. As soon as you do
so, Manual Override will turn off again, since you will have selected gas that is considered the Best
Gas at that moment.
Settings related to CCR Dives
When diving CCR, there is a larger set of settings to configure. First, you must set values for your
“Low” and High setpoints. You can set them to any value between 0.3-1.0 and 0.5-2.0, respectively, in
0.1 increments. The Low setpoint must be less than the “High” setpoint.
You can use these pre-configured Low and “High” setpoints to quickly change setpoints underwater
(this way, you don’t have to create a new setpoint while underwater). These pre-configured setpoints
will be used to calculate your ascent schedules.
There are two more values related to these setpoints that you will need to configure: “On Descent” and
“On Ascent”. “On Descent” allows you to configure at what depth you want to switch from the Low
setpoint to the High setpoint during your descent. “On Ascent” allows you to configure at what depth
you want to switch from the High setpoint to the Low setpoint during your ascent.
