Suunto HelO2 [19/64] Mixed gas dive mode settings

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5.9. MIXED GAS DIVE mode settings

Suunto HelO

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 the dive submode chosen (MIXED GAS, GAUGE), so that, for example,

gas mix settings are only available in the MIXED GAS submode.

With Suunto HelO

, 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

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 the mixes

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.