Diving in gauge mode – SUUNTO VYTEC User Manual

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within the set maximum oxygen partial pressure. Tissue calculation

during dive is based on the mix you have selected.
The Vytec allows gas change to enabled gas mixes during the dive.

Gas change is made by the following procedure:

Press the MODE button until the Vytec starts to show blinking

MIX instead of temperature/cylinder pressure in the lower left

display (Fig. 3.27).

Scroll between enabled mixes with PLAN and TIME buttons

Mix number, O2% and PO2 for the mixes are shown when

scrolling. If set PO2 is exceeded it will be shown with the value

blinking and upward pointing arrow

Select mix by pressing MODE.

If no button is pressed in 15 seconds the Vytec will go back to

dive display without changing gas mix. The Vytec does not allow

change to a gas when set PO2 is exceeded. In such a case the

mix is shown but cannot be selected (select text is not shown).

Upon ascent the Vytec prompts you to change gas when the PO2 level

you have set for next mix is allowing a gas change. The prompt is an

audible three beeps and the current mix O% starts to blink.
NOTE: The Vytec will not let you switch to gases which maximum PO2

levels are exceeded.

3.5. DIVING IN GAUGE MODE

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

for diving with technical diving mixed gases. If you are trained for tech-

nical diving and you plan to use Gauge mode on a regular basis, it may

be preferable to set the instrument permanently to its Gauge mode.

The Gauge mode is enabled in the MODE-SET-SET PREF-MODEL

submode (see section 4.3. Set Modes).
If set to Gauge mode the text GAUGE is shown after activation (Fig. 3.4.).
In the Gauge mode the total Dive Time is always displayed in minutes

in the lower right corner. In addition a Dive Timer in the center window

displays time in minutes and seconds. The center window Dive Timer is

activated at the start of the dive and it can be reset during the dive and

used as a stopwatch by pressing the PLAN button.
When the PLAN button is pressed during the dive:

A special mark, bookmark is written in the profile memory.

The Dive Timer shown in the center window is stopped, reset

and started again.