Suunto HELO2 manual Before you have ascended above this depth, Setting the depth alarm

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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 "---" (max. 199 min).

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 factory-set to 50 m/160 ft, but you can adjust it according to your per- sonal preference, or switch it off altogether. The depth range can be set from 3 m to 120 m/10 ft to 394 ft.

5.9.3. Setting the dive-time alarm

The Suunto HelO2 has a dive-time alarm setting which, when activated, can be used for several purposes to add to your diving safety.

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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Contents HelO2 Page Welcome to the World of Suunto Diving Instruments Care and Maintenance of MY Suunto Diving Computer Using HelO2 with Dive Manager and Dive Planner Welcome to the World of Suunto Diving InstrumentsPhysician regarding your fitness before diving Or professional diving activitiesOr death ASC Time symbol and the upward pointing arrow Stop, and Rgbm adjustments are correctUSE BACK-UP INSTRUMENTS! Make sure that you use back-up Diving with the dive computerBatteries. Recycle or dispose of used batteries properly Before the instrument has counted down the no-fly timeButton symbols and functions Symbol Button Press Main functionsSuunto HELO2 AT a Glance Navigating in the menusDown Long Enter Setting mode Time mode settings Setting the timeSetting the date Setting the unitsAC water contacts Setting the backlightSetting the tones Suunto Technical Rgbm Before DivingPlanning your dives Mixed gas diving Emergency ascentsDive computer limitations Audible and visual alarms Alarm indication Alarm reasonAlarm indication Error conditionsOut of calculation limits Gas mixWireless transmission Installing the wireless transmitterPairing and code selection Omitted decompressionTransmitting data Display IndicationDive Mixed GAS Dive mode settingsSetting the gases Setting the depth alarm Setting the dive-time alarmSetting the personal/altitude adjustments Before you have ascended above this depthSetting the sample rate Setting the tank pressure alarmSetting the tank pressure Setting the HP codeActivation and pre-checks Accessing Dive modeDive mode activation Diving at altitude Battery power indicationAlt. adjustment value Altitude range Personal adjustments Personal adjust- Condition Desired tables Ment valueHow the Altitude value is set Before divingSafety Stops Recommended Safety StopsMandatory Safety Stops Other personal injury, and deathDeep stops Basic dive data DivingDiving-related information Decompression dives Ascent rate indicatorBookmark Ceiling, ceiling zone, floor and decompression range Than at the ceilingAccident, you should stay somewhat below the ceiling Display below the floorDisplay above the floor Display at the ceiling zoneDiving in Mixed GAS mode Before diving in Mixed GAS modeDefault gas mix settings Oxygen and helium displaysOxygen limit fraction OLF Gas change and multiple breathing gas mixesDiving in Gauge mode Alarms Symbol on display After DivingSurface interval Dive numberingPlan mode Dive Planning mode PLANnodecRepetitive dive planning Flying after divingPLANNoDec mode Memory modeMixed GAS mode, it does not affect the calculations Dive numbering shown during dive planningDive logbook MEMLogbook Dive history Suunto Dive Planner SDPDive Planner. It ensures that you have a valid decompression Suunto Dive Manager SDMPage Care and Maintenance of MY Suunto Diving Computer Water Contacts and Push ButtonsWarranty FAQsBattery replacement and strap kits must be used Battery Replacement Battery kitReplacing the battery Required toolsBattery compartment lid, indicating a leak Wireless transmitter battery replacementMade in a proper manner to avoid any leakage of water into TransmitterTransmitter battery kit Stalling the transmitter batteryPage Technical Data Battery RgbmAfter dive planning Diver safety and Suunto Technical Rgbm modelSuunto Technical Rgbm decompression model Altitude diving Oxygen exposurePatent notice Intellectual PropertyCopyright Trademark 12.2. CE DisclaimersUser’s responsibility Warranty Period Exclusions and LimitationsLimitation of Liability Access to Suunto warranty serviceOther important notices Page Disposal of the Device Glossary EAD EANNo DEC Time Customer Service Contacts CopyrightPage TWO Year Warranty Page Page Suunto Oy 4/2009