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5.9. MIXED GAS DIVE mode settings
Suunto HelO
2
has several user-definable functions, as well as depth and time-related
alarms that you can set according to your personal preferences. The DIVE mode settings
are dependent on thedive submode chosen (MIXED GAS, GAUGE),so that, for example,
gas mix settings are only available in the MIXED GAS submode.
With Suunto HelO
2
, most of the settings are planned with the Suunto Dive Planner and
downloaded to the dive computer. If necessary, they can be changed manually.
The following figure shows how to enter the DIVE mode settings menu.
USE UP AND DOWN BUTTONS
TO
TOGGLE BETWEEN DIVE SETTINGS
NOTE
Some settings cannot be changed until 5 minutes has elapsed after
the dive.
5.9.1. Setting the gases
If set to the MIXED GAS mode, the correct oxygen and helium percentages of the gas in
your cylinders (and additional gases) must always be entered into the dive computer to
ensure correct tissue and oxygen calculation. In addition, the oxygen partial pressure
limit must be set. You can either modify the dive plan with the Suunto Dive Planner or
enter the correct values directly into the dive computer after analyzing the gas mixes in
your cylinders.
ADJUST WITH
UP AND DOWN
BUTTONS.
ACCEPT WITH
SELECT BUTTON.
ADJUST WITH
UP AND DOWN
BUTTONS.
ACCEPT WITH
SELECT BUTTON.
When in the MIXED GAS setting mode, the equivalent maximum operating depth, based
on the chosen setting, is also be displayed.
After entering values for MIX1, you can set additional mixes, MIX2 - MIX8, similarly. You
can set them to "PRIMARY", "SECONDARY" or "OFF". MIX 1 is always set as a primary
gas.
In order to minimize the risk of error during a dive, it is highly recommended that themixes
are set in the proper order. This means that as the mix number rises, so does oxygen
content, and this is the order they are usually used during the dive. Before a dive, only
enable the mixes you actually have available and remember to check the set values to
make sure they are correct.
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