Suunto Cobra2 User Manual download pdf (Page 32)

UP BUTTON

TOGGLES

BETWEEN PO

OLF, DIVE TIME

AND WATER

TEMPERATURE.

DOWN BUTTON

TOGGLES

BETWEEN O

MAXIMUM DEPTH

TANK PRESSURE

AND CURRENT

TIME.

6.2.3. Oxygen limit fraction (OLF)

If set to NITROX mode, in addition to tracking the diver's exposure to nitrogen, the

instrument tracks the exposure to oxygen. These calculations are treated as entirely

separate functions.

The dive computer calculates separately for Central Nervous System oxygen toxicity (CNS)

and Pulmonary Oxygen toxicity, the latter measured by the addition of Oxygen Toxicity

Units (OTU). Both fractions are scaled so that the maximum tolerated exposure for each

is expressed as 100%.

The Oxygen Limit Fraction (OLF) displays only the value of the higher of the two

calculations. The oxygen toxicity calculations are based on the factors listed in Section

9.3 “Oxygen exposure”.

6.2.4. Gas change and multiple breathing gas mixes

The Suunto Cobra2 allows gas changes to enabled gas mixes during the dive. Gas changes

are made by following the procedure below:

CHANGING GAS MIX. SCROLL

THROUGH ENABLED MIXES BY

PRESSING THE UP OR DOWN

BUTTONS. SELECT NEW MIX BY

PRESSING THE SELECT BUTTON.

NOTE

Mix number, O

%, and PO

for the mixes are shown when scrolling.

If the set PO

limit is exceeded , it will be shown with the PO

value

blinking. The dive computer does not allow you to change to a gas

whose set PO

is exceeded. In such a case, the mix is shown but

cannot be selected.

NOTE

If no button is pressed in 15 seconds, the dive computer will go back

to the dive display without changing the gas mix. Upon ascent, the

computer prompts you to change gas when the PO

level you have

set for the next mix allows a gas change. The prompt is an audible 3

beeps and the current O

mix starts to blink.

6.3. Diving in GAUGE mode (DIVEgauge)

If set to GAUGE mode, the dive computer can be used as a bottom timer.

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Suunto Cobra2 User Manual Page 32

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