Suunto HELO2 Diving in Mixed GAS mode, Before diving in Mixed GAS mode, Default gas mix settings

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DECOMPRESSION DIVE, ABOVE CEILING. NOTE DOWNWARD POINTING ARROW, ER WARNING AND ALARM. YOU SHOULD IMMEDIATLY (WITHIN

3 MINUTES) DESCEND TO OR BELOW CEILING.

In addition, an Error warning (Er) reminds you that you have only three minutes to correct the situation. You must immediately descend to, or below, the ceiling.

If you continue to violate the decompression, the dive computer will go into a permanent Error Mode. In this mode, the instrument can only be used as a depth gauge and timer. You must not dive again for at least 48 hours. (See Section 5.7. Error conditions).

6.2. Diving in MIXED GAS mode

MIXED GAS mode is the first dive mode available in Suunto HelO2. The mode is used when diving with air or with oxygen- or helium-enriched gas mixes.

6.2.1. Before diving in MIXED GAS mode

If set to the MIXED GAS mode, the correct oxygen and helium percentage of the gas in your cylinders must always be entered into the computer to ensure correct inert gas and oxygen calculations. The dive computer adjusts its mathematical inert gas and oxygen calculation models accordingly. The dive computer will not accept fractional percentage values of oxygen and helium concentration. Do not round up fractional percentages. For example, 31.8% oxygen should be entered as 31%. Rounding up will cause inert gas 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 PO2 setting to affect oxygen exposure according to the entered O2% and PO2 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 O2% .

When the dive computer is set in MIXED GAS mode, the Dive Planning mode calculates using the O2% and PO2 values that are currently in the computer.

To set the nitrox, trimix and/or or heliox mixes, refer to Section 5.9.1. Setting the gases.

Default gas mix settings

In MIXED GAS mode, the Suunto HelO2 allows you to set 1 – 8 gas mixes containing 8 – 99% oxygen and 0 – 92% helium.

In the MIXED GAS mode, the default setting is standard air (21% O2 and 0% He). It remains in this setting until the O2% is adjusted to any other percentage of oxygen (8% – 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.

6.2.2. Oxygen and helium displays

When MIXED GAS mode is activated, the display will show the information in the figure below. In MIXED GAS mode, the maximum operational depth is calculated based on set O2%, He% and PO2 values.

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Contents HelO2 Page Welcome to the World of Suunto Diving Instruments Care and Maintenance of MY Suunto Diving Computer Welcome to the World of Suunto Diving Instruments Using HelO2 with Dive Manager and Dive PlannerOr death Or professional diving activitiesPhysician regarding your fitness before diving Diving with the dive computer ASC Time symbol and the upward pointing arrowStop, and Rgbm adjustments are correct USE BACK-UP INSTRUMENTS! Make sure that you use back-upBefore the instrument has counted down the no-fly time Batteries. Recycle or dispose of used batteries properlyNavigating in the menus Button symbols and functionsSymbol Button Press Main functions Suunto HELO2 AT a GlanceDown Long Enter Setting mode Setting the units Time mode settingsSetting the time Setting the dateSetting the tones Setting the backlightAC water contacts Planning your dives Before DivingSuunto Technical Rgbm Dive computer limitations Emergency ascentsMixed gas diving Alarm indication Alarm reason Audible and visual alarmsGas mix Alarm indicationError conditions Out of calculation limitsOmitted decompression Wireless transmissionInstalling the wireless transmitter Pairing and code selectionDisplay Indication Transmitting dataSetting the gases Mixed GAS Dive mode settingsDive Before you have ascended above this depth Setting the depth alarmSetting the dive-time alarm Setting the personal/altitude adjustmentsSetting the HP code Setting the sample rateSetting the tank pressure alarm Setting the tank pressureDive mode activation Accessing Dive modeActivation and pre-checks Alt. adjustment value Altitude range Battery power indicationDiving at altitude Before diving Personal adjustmentsPersonal adjust- Condition Desired tables Ment value How the Altitude value is setOther personal injury, and death Safety StopsRecommended Safety Stops Mandatory Safety StopsDeep stops Diving-related information DivingBasic dive data Bookmark Ascent rate indicatorDecompression dives Than at the ceiling Ceiling, ceiling zone, floor and decompression rangeDisplay at the ceiling zone Accident, you should stay somewhat below the ceilingDisplay below the floor Display above the floorOxygen and helium displays Diving in Mixed GAS modeBefore diving in Mixed GAS mode Default gas mix settingsGas change and multiple breathing gas mixes Oxygen limit fraction OLFDiving in Gauge mode Dive numbering Alarms Symbol on displayAfter Diving Surface intervalFlying after diving Plan modeDive Planning mode PLANnodec Repetitive dive planningDive numbering shown during dive planning PLANNoDec modeMemory mode Mixed GAS mode, it does not affect the calculationsDive logbook MEMLogbook Suunto Dive Planner SDP Dive historySuunto Dive Manager SDM Dive Planner. It ensures that you have a valid decompressionPage Water Contacts and Push Buttons Care and Maintenance of MY Suunto Diving ComputerBattery replacement and strap kits must be used FAQsWarranty Required tools Battery ReplacementBattery kit Replacing the batteryTransmitter Battery compartment lid, indicating a leakWireless transmitter battery replacement Made in a proper manner to avoid any leakage of water intoStalling the transmitter battery Transmitter battery kitPage Technical Data Rgbm BatterySuunto Technical Rgbm decompression model Diver safety and Suunto Technical Rgbm modelAfter dive planning Oxygen exposure Altitude divingCopyright Trademark Intellectual PropertyPatent notice User’s responsibility Disclaimers12.2. CE Exclusions and Limitations Warranty PeriodOther important notices Access to Suunto warranty serviceLimitation of Liability Page Disposal of the Device EAD EAN GlossaryNo DEC Time Copyright Customer Service ContactsPage TWO Year Warranty Page Page Suunto Oy 4/2009
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