![Suunto Cobra3 [32/60] Before diving in nitrox mode](/img/pdf.png)
Suunto Cobra3 [32/60] Before diving in nitrox mode
![Suunto Cobra3 [32/60] Before diving in nitrox mode](/views2/1013658/page32/bg20.png)
6.2. Diving in NITROX mode (DIVEnitrox)
NITROX mode (DIVEnitrox) is the second dive mode available in Suunto Cobra3 and is
used when using oxygen-enriched gas mixtures.
6.2.1. Before diving in NITROX mode
If set to the NITROX mode, the correct oxygen percentage of the gas in your cylinder must
always be entered into the computer to ensure correct nitrogen and oxygen calculations.
The dive computer adjusts its mathematical nitrogen and oxygen calculation models
accordingly. The dive computer will not accept fractional percentage values of oxygen
concentration. Do not round up fractional percentages. For example, 31.8% oxygen should
be entered as 31%. Rounding up will cause nitrogen percentages to be understated and
will affect decompression calculations. If you want to adjust the computer to provide more
conservative calculations, use the personal adjustment feature to affect decompression
calculations, or reduce the PO
2
setting to affect oxygen exposure according to the entered
O
2
% and PO
2
values. Calculations based on nitrox use result in longer no-decompression
times and shallower maximum depths than diving with air.
As a safety precaution, the oxygen calculations in the computer are made with an oxygen
percentage of 1% + set O
2
% .
When the dive computer is set in NITROX mode, the Dive Planning mode calculates using
the O
2
% and PO
2
values that are currently in the computer.
To set the nitrox mixes, refer to Section 5.8.3. Setting the nitrox values.
Default nitrox settings
In NITROX mode, the Suunto Cobra3 allows you to set 1 or 2 nitrox mixes containing
21-99% oxygen.
In the NITROX mode, the default setting for MIX1 is standard air (21% O
2
). It remains in
this setting until the O
2
% is adjusted to any other percentage of oxygen (22% - 99%). The
default setting for maximum oxygen partial pressure is 1.4 bar, however you are able to
set it in the range of 0.5 - 1.6 bar.
MIX2 is set to OFF by default. To set MIX2 , refer to Section 6.2.4. Gas change and multiple
breathing gas mixes. Oxygen percentages and maximum oxygen partial pressures for
MIX2 are stored permanently.
6.2.2. Oxygen displays
When NITROX mode is activated, the display will show the information in the figure below.
In NITROX mode, the maximum operational depth is calculated based on set O
2
% and
PO
2
values.
NITROX DIVE MODE ACTIVATION.
MAXIMUM OPERATIONAL DEPTH BASED ON
SET O
2
% (21%) AND PO
2
(1.4 BAR) IS 56.7 M.
If set to NITROX mode, the Suunto Cobra3 will additionally show on the alternative display:
•
the oxygen percentage, labeled O
2
%
•
the set oxygen partial pressure limit, labeled PO
2
•
the current oxygen toxicity exposure, labeled OLF
•
maximum depth
•
current time
•
water temperature
•
dive time
•
tank pressure
32
Содержание
- Cobra3 1
- User s guide 1
- Table of contents 3
- Welcome to the world of suunto diving instruments 5
- Warnings cautions and notes 6
- Button symbols and functions 9
- Navigating in the menus 9
- Suunto at a glance 9
- Getting started with your suunto cobra3 11
- Setting the alarm 11
- Setting the date 11
- Setting the time 11
- Time mode settings 11
- Ac water contacts 12
- Setting the backlight 12
- Setting the tones 12
- Setting the units 12
- Compass display 13
- Learning how to use your compass 13
- Locking a bearing 13
- Calibration 14
- Compass settings 14
- Declination 15
- Declination you can compensate for the difference between true north and magnetic north by adjusting the compass declination the declination can be found for example from sea charts or topographic maps of the local area 15
- If the calibration fails several times in a row it is possible that you are in an area with sources of magnetism such as large metal objects power lines or electric appliances move to another location and try to calibrate the compass again if the calibration continues to fail contact an authorized suunto service center 15
- Time out 15
- Time out you can set the compass time out to 1 3 or 5 minutes after the set time has passed from the latest button press the dive computer returns to the time or dive mode from the compass mode 15
- You can exit the compass mode also by long pressing the select button 15
- Before diving 16
- Dive computer limitations 16
- Emergency ascents 16
- The suunto rgbm deep stop algorithm 16
- Audible and visual alarms 17
- Nitrox 17
- Air integration 18
- Error conditions 18
- Connecting suunto cobra3 to a regulator 19
- Dive mode settings 19
- Setting the depth alarm 19
- Setting the dive time alarm 19
- Setting the nitrox values 20
- Setting the personal altitude adjustments 20
- Setting the rgbm values 21
- Setting the safety stops deep stops 21
- Setting the sample rate 21
- Setting the tank pressure alarm 21
- Setting the units 21
- Accessing dive mode 22
- Activation and pre checks 22
- Dive mode activation 22
- Battery power indication 23
- Diving at altitude 23
- Personal adjustments 24
- Mandatory safety stops 25
- Recommended safety stops 25
- Safety stops 25
- Deep stops 26
- Basic dive data 27
- Diving 27
- Diving in air mode diveair 27
- Bookmark 28
- Tank pressure data 28
- Ascent rate indicator 29
- Decompression dives 29
- Safety stops 29
- Ceiling ceiling zone floor and decompression range 30
- Display below the floor 30
- Display above the ceiling 31
- Display above the floor 31
- Display at the ceiling zone 31
- Before diving in nitrox mode 32
- Default nitrox settings 32
- Diving in nitrox mode divenitrox 32
- Oxygen displays 32
- Diving in gauge mode divegauge 33
- Gas change and multiple breathing gas mixes 33
- Oxygen limit fraction olf 33
- After diving 35
- Dive numbering 35
- Repetitive dive planning 35
- Surface interval 35
- Dive planning mode plannodec 36
- Flying after diving 36
- Plan mode 36
- Dive numbering shown during dive planning 37
- Dive simulator 37
- Simulation mode plansimulator 37
- Dive logbook memlogbook 38
- Memory mode 38
- Dive history memhistory 39
- Suunto dive manager sdm 40
- Www suuntosports com and suunto diving world at www suunto com diving 40
- Care and maintenance of my suunto diving computer 42
- Battery kit 44
- Battery replacement 44
- Replacing the battery 44
- Required tools 44
- Technical data 46
- Technical specifications 46
- Suunto rgbm adaptive decompression 47
- No decompression limits 48
- Altitude diving 49
- Oxygen exposure 49
- Copyright 50
- Intellectual property 50
- Patent notice 50
- Trademark 50
- Disclaimers 51
- User s responsibility 51
- Suunto limited warranty for suunto diving computers and suunto diving computer accessories 52
- Disposal of the device 55
- Glossary 56
- Copyright 58
- Customer service contacts 58
- Two year warranty 59
- Www suunto com 60
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