The ASC time is calculated based on the assumption that you start the ascent profile im- mediately and all the PRIMARY gases are changed as soon as their maximum operating depth allows it. That is, using the gases that are set as primary, the most optimal ascent schedule for the moment is calculated.
To see the most pessimistic ascent schedule, that is, a schedule for the situation when gases are not changed at all, you can set the gases as secondary and the time it takes to finish the decompression using the current breathing gas is shown as the ASC time.
Showing the most pessimistic ascent schedule during a long dive can easily result in the ascent time no longer fitting the reserved field and the dive computer displays
NOTE | While setting the gases, notice that the calculated maximum operating |
| depth is displayed in the upper field. You cannot change to this gas |
| before you have ascended above this depth. |
The default oxygen percentage (O2%) setting is 21% (air) and oxygen partial pressure (PO2) setting 1.4 bar.
5.9.2. Setting the depth alarm
You can set a depth alarm in the dive computer.
ADJUST WITH UP AND
DOWN BUTTONS. ACCEPT
WITH SELECT BUTTON.
The depth alarm is
5.9.3. Setting the dive-time alarm
The Suunto HelO2 has a
ADJUST WITH UP AND
DOWN BUTTONS. ACCEPT
WITH SELECT BUTTON.
NOTE | With a range of 1 - 999 minutes, the alarm can be set to your planned |
| bottom time, for example. |
5.9.4. Setting the personal/altitude adjustments
The current Altitude and Personal Adjustment settings are displayed in the startup screen when entering the DIVE mode. If the mode does not match the altitude or personal condi- tions (see Section 5.10.4. Diving at altitude and Section 5.10.5. Personal adjustments), it is imperative that you enter the correct selection before diving. Use Altitude Adjustment to select the correct altitude and use Personal Adjustment to add an extra level of conser- vatism or aggressiveness.
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