SUUNTO MOSQUITO User Manual

SUUNTO

MOSQUITO

USER’S GUIDE

Present Depth Maximum Depth Average Depth in Logbook Fast Ascent Warning (SLOW) AC Indicator

Do Not Fly Icon

Arrows:

- Decompression Stop at the Ceiling Depth

- Mandatory Safety Stop Zone

- Ascent Recommended

- Must Descend

Bar Graph:

- Ascent Rate

- Battery Power

- Mode Indicator

Diver Attention Symbol

Temperature Maximum Depth Mode Text Oxygen Percentage in Nitrox Mode Week Day Timer Hours and Minutes

Low Battery Warning

Current Time Display No-Decompression Time Surface Interval Time No Flying Time Total Ascent Time Ceiling Depth on Decompression Stop Safety Stop Time Mandatory Safety Stop Depth and Time

Bar Graph:

- Mode Indicator

- Oxygen Limit Fraction

Altitude Adjustment Mode

Personal Adjustment Mode

AM/PM Indicator

Safety Stop Warning Safety Stop Indicator

Dive Time

Dive Counter Oxygen Partial Pressure in Nitrox Mode Time Dual Time Day, Month Timer Seconds Oxygen Partial Pressure

Daily Alarm On Indicator

Dive Alarm On Indicator

SUUNTO MOSQUITO

QUICK REFERENCE QUIDE

DEFINITION OF WARNINGS, CAUTIONS AND NOTES

Throughout this manual, special references are made when deemed important. Three classiﬁ cations are used to separate these references by their order of im por tance.

WARNING - is used in connection with a procedure or situation that may result in serious injury or death.

CAUTION - is used in connection with a procedure or situation that will result in damage to the product.

NOTE - is used to emphasize important information.

This instruction manual is copyrighted and all rights are reserved. It may not, in whole or in part, be copied, photocopied, reproduced, translated, or reduced to any media without prior written consent from SUUNTO.

SUUNTO, MOSQUITO, Consumed Bottom Time (CBT), Oxygen Limit Frac tion (OLF), SUUNTO Reduced Gradient Bubble Model (RGBM), Continuous Decompression and their logos are all registered or unregistered trademarks of SUUNTO. All rights are reserved.

Patents have been issued or applied for one or several features of this product.

The CE mark is used to mark conformity with the European Union EMC di rec tive 89/336/EEC. The SUUNTO dive instruments fulﬁ ll all the required EU di rec tives.

FIOH, Laajaniityntie 1, FIN-01620 Vantaa, Finland, notiﬁ ed body no.0430, has EC type-examined this type of personal protective equipment.

This instrument must be serviced by an authorized dealer every second year or after 200 dives (whichever comes ﬁ rst). See chapter 6.

PrEN 13319

PrEN 13319 ”Diving accessories – Depth gauges and combined depth and time measuring devices – Functional and safety requirements, test methods” is a Eu ro pe an diving depth gauge standard draft. The MOSQUITO is designed to comply with this draft standard.

ISO 9001

SUUNTO Oy’s Quality Assurance System is certiﬁ ed by Det Norske Veritas to be according to the ISO 9001 in all SUUNTO Oy’s operations (Quality Cer tiﬁ cate No. 96-HEL-AQ-220).

SUUNTO Oy does not assume any responsibility for losses or claims by third parties, which may arise through the use of this device.

Due to continuous product development, the MOSQUITO is subject to change without notice.

WARNING

Read this manual. Carefully read this instruction manual in its entirety paying close attention to all warnings listed below, including chapter 1.1. ”Safety Pre cau tions”. Make sure that you fully understand the use, displays and limitations of the dive computer because any confusion resulting from neglecting to follow this instruction manual or from improper use of this device may cause a diver to commit errors that may lead to serious injury or death.

WARNING

Not for professional use. Suunto dive computers are intended for recreational use only. The demands of commercial or professional diving may expose the diver to depths and exposures that tend to increase the risk of decompression illness (DCI). Therefore, Suunto strongly recommends that the device be not used for com mer cial or professional diving activity.

WARNING

Only divers trained in the proper use of scuba diving equipment should use a dive computer. No dive computer can replace the need for proper dive training. Insufﬁ cient or improper training may cause diver to commit errors that may lead to serious injury or death.

WARNING

There is always a risk of decompression illness (DCI) for any dive proﬁ le even if you follow the dive plan prescribed by dive tables or a dive computer. No pro ce dure, dive computer or dive table will prevent the possibility of DCI or oxygen toxicity. An individual’s physiological make up can vary from day to day. The dive computer cannot account for these variations. You are strongly advised to remain well within the exposure limits provided by the instrument to minimize the risk of DCI. As an added measure of safety, you should consult a physician regarding your ﬁ tness before diving.

WARNING

Suunto strongly recommends that sport divers limit their maximum depth to 40 m [130 ft] or to the depth calculated by the computer based on the selected O2% and a maximum PO2 of 1.4 bar settings.

WARNING

Dives with required decompression stops are not recommended. You should as cend and begin decompression immediately when the dive computer shows you that a decompression stop is required. Note the blinking ASC TIME symbol and the upward pointing arrow.

WARNING

Use back-up instruments. Make sure that you use back-up instrumentation in clud ing a depth gauge, submersible pressure gauge, timer or watch, and have access to decompression tables whenever diving with a dive computer.

WARNING

Perform pre-checks. Always activate and check the device before diving in order to ensure that all Liquid Crystal Display (LCD) segments are completely dis played, that the device has not run out of battery power, and that the oxygen, altitude and personal adjustments are correct. Also, exit the Data Transfer mode before diving, as the computer does not automatically revert to Dive mode from Data Transfer mode.

WARNING

You are advised not to ﬂ y any time the computer counts down the no-ﬂ ying time. Always activate the computer to check the remaining no-ﬂ y time prior to ﬂ ying. The computer goes into the stand-by display automatically 5 minutes after sur fac ing. Flying or traveling to a higher altitude within no-ﬂ y time can greatly increase the risk of DCI. Review the recommendations given by Diver’s Alert Network (DAN) in chapter 3.2.3.4. “Flying After Diving”. There can never be a ﬂ ying after diving rule that is guaranteed to completely prevent decompression illness!

WARNING

The dive computer should never be traded or shared between users while it is in operation. Its information will not apply to someone who has not been wearing it throughout a dive or sequence of repetitive dives. Its dive proﬁ les must match that of the user. If it is left on the surface during any dive, it will give inaccurate information for subsequent dives. No dive computer can take into account dives made without the computer. Thus any diving activity up to four days prior to initial use of the computer may cause misleading information and must be avoided.

WARNING

Do not dive with a cylinder of enriched air if you have not personally veriﬁ ed its contents and entered the analyzed value into your dive computer. Failure to verify cylinder contents and enter the appropriate O2% into your dive computer will result in incorrect dive planning information.

WARNING

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 there is a desire 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.

WARNING

Set the correct Altitude Adjustment Mode when diving at altitudes greater than 300 m [1000 ft] the Altitude Adjustment feature must be correctly selected in order for the computer to calculate the decompression status. The dive computer is not intended for use at altitudes greater than 3000 m [10000 ft]. Failure to select the correct Altitude Adjustment setting or diving above the maximum altitude limit will result in erroneous dive and planning data.

WARNING

Set the correct Personal Adjustment Mode. Whenever it is believed that factors that tend to increase the possibility of DCI exist, it is recommended that you use this option to make the calculations more conservative. Failure to select the correct Personal Adjustment Setting will result in erroneous dive and planning data.

WARNING

Freediving after scuba diving is not recommended. It is recommended to avoid freediving for at least two hours and not to exceed ﬁ ve meters [16 ft] after scuba diving depending on your diving activity.

Suunto also recommends you to be trained in freediving technique and physiology before conducting breath holding dives. No dive computer can replace the need for proper dive training. Insufﬁ cient or improper training may cause diver to commit errors that may lead to serious injury or death.

NOTE:

Changing from AIR to EAN mode is possible at any time. Changing from EAN to AIR mode however requires you to wait until the no-ﬂ ying time has counted down. FREE mode is accessible at any time.

FREE mode is limited to 5 minutes, after which a warning is given. After 5+1 minutes the computer goes into error mode.

TABLE OF CONTENTS

1. INTRODUCTION ........................................................................................12

1.1. SAFETY PRECAUTIONS .................................................................... 13

1.1.1. Emergency Ascents ...................................................................... 14

1.1.2. Dive Computer Limitations ......................................................... 15

1.1.3. Nitrox ..........................................................................................15

1.1.4. Freediving .................................................................................... 15

2. GETTING ACQUAINTED ........................................................................... 17

2.1. FUNCTIONS ......................................................................................... 17

2.2. PUSH BUTTONS .................................................................................. 17

2.3. WATER CONTACTS.............................................................................19

2.4. TIME MODE [TIME]............................................................................20

2.4.1. Timekeeping Display ...................................................................20

2.4.2. Stopwatch [Timer] ....................................................................... 21

3. DIVING WITH THE MOSQUITO............................................................... 23

3.1 BEFORE DIVING .................................................................................. 24

3.1.1. Activation and Pre-checks .......................................................... 24

3.1.2. Battery Power Indicator and Low Battery Warning ..................... 26

3.1.3. User Deﬁ nable Functions and Alarms ......................................... 28

3.1.3.1. Presetting Time Alarm ....................................................29

3.1.3.2. Presetting Dive Alarms ...................................................29

3.1.4. Bookmark Function ..................................................................... 29

3.2. SCUBA DIVING ................................................................................... 30

3.2.1. Diving with Air ............................................................................ 30

3.2.1.1. Dive Planning [PLAN] ................................................... 30

3.2.1.2. Presetting the Displays in the Air mode ..........................32

3.2.1.3. Basic Dive Data .............................................................. 32

3.2.1.4. Safety stops .................................................................... 34

3.2.1.4.1. Recommended Safety Stop .................................. 35

3.2.1.4.2. Mandatory Safety Stop ........................................ 35

3.2.1.5. Ascent Rate Indicator ...................................................... 37

3.2.1.6. Decompression dives ...................................................... 39

3.2.2. Diving with EAN (Nitrox) ........................................................... 45

3.2.2.1. Before Diving ................................................................45

3.2.2.2. Presetting the Displays in the EAN mode ......................46

3.2.2.3. Oxygen Displays ............................................................. 47

3.2.2.4. Oxygen Limit Fraction (OLF) ........................................ 48

3.2.3. At the Surface .............................................................................. 49

3.2.3.1. Surface Interval after an Air/EAN Dive ......................... 49

3.2.3.2. Diver Attention Symbol ..................................................51

3.2.3.3. Dive Numbering .............................................................51

3.2.3.4. Flying After Diving ......................................................... 52

3.2.4. High Altitude Dives and Personal Adjustment ............................ 53

3.2.4.1. Altitude Adjustment ........................................................ 53

3.2.4.2. Personal Adjustment ....................................................... 55

3.2.5. Error Conditions .........................................................................57

3.3. FREEDIVING .......................................................................................58

3.3.1. Before Diving in the Free mode ..................................................58

3.3.2. Presetting the Displays in the Free mode ..................................... 58

3.3.3. During the Freedive ..................................................................... 59

3.3.4. Freediving Day History................................................................59

3.3.5. Exceeding the Freediving Time Limit .........................................60

3.3.6. Surface Interval After a Freedive ................................................. 61

3.4. AUDIBLE AND VISUAL ALARMS .................................................... 62

4. SETTING MODE [SET] ..............................................................................65

4.1. SETTING TIME, DATE AND DUAL TIME [TIME ] .......................... 65

4.2. DAILY ALARM SETTING [ALM] ......................................................67

4.3. DIVE MODE SETTINGS [DIVE] ........................................................ 69

4.3.1. Set Air Mode ................................................................................ 69

4.3.2. Set EAN Mode ............................................................................. 71

4.3.3. Set Free Mode .............................................................................. 72

4.4. DIVE ALARM SETTINGS [DIVE AL] ............................................ 73

4.5. ALTITUDE, PERSONAL AND UNIT ADJUSTMENT SETTINGS ..

[AdJ] ..................................................................................................... 75

5. MEMORIES AND DATA TRANSFER [MEM] .......................................... 77

5.1. LOGBOOK AND DIVE PROFILE MEMORY [LOG] ........................ 78

5.2. DIVE HISTORY MEMORY [HIS]........................................................ 83

5.3. DATA TRANSFER AND PC-INTERFACE [TR-PC] ........................... 84

6. CARE AND MAINTENANCE .................................................................... 87

6.1. CARE OF YOUR MOSQUITO ............................................................. 87

6.2. MAINTENANCE .................................................................................. 88

6.3. WATER RESISTANCE INSPECTION ................................................. 89

6.4. BATTERY REPLACEMENT ................................................................ 90

7. TECHNICAL DESCRIPTION ..................................................................... 93

7.1. OPERATING PRINCIPLES ..................................................................93

7.2. REDUCED GRADIENT BUBBLE MODEL, SUUNTO RGBM ........ 96

7.3. OXYGEN EXPOSURE ......................................................................... 98

7.4. TECHNICAL SPECIFICATION ......................................................... 100

8. WARRANTY ..............................................................................................105

9. GLOSSARY ................................................................................................ 107

1. INTRODUCTION

Congratulations on your purchase of the SUUNTO MOSQUITO advanced wristop dive computer. The Mosquito builds on the Suunto tradition of delivering featurerich dive computers, providing different operating modes for different types of diving. Push button controls access a wide selection of choices. The display is optimized for the dive mode chosen and it incorporates a patented user deﬁ nable display ﬁ eld. This dive computer is a compact and sophisticated multipurpose dive instrument, designed to give you years of trouble-free usage.

CHOICE OF DIVING AND WATCH MODES

User options for the Mosquito are selected using the push buttons.

Pre dive conﬁ guration and setup options include:

• Choice of operating mode – Air / Nitrox / Freediving

• Maximum depth alarm

• Dive time alarm

• Oxygen fraction % (Nitrox mode only)

• Oxygen partial pressure alarm limit (Nitrox mode only)

• Altitude adjustment

• Personal adjustment

• Choice of unit – Metric / Imperial

• Clock, calendar, daily alarm, stopwatch, dual time

• User deﬁ nable display ﬁ elds

CONTINUOUS DECOMPRESSION WITH SUUNTO RGBM

The Suunto Reduced Gradient Bubble Model (RGBM) utilized in the Mosquito predicts both dissolved and free gas in blood and tissues of divers. It is a signiﬁ cant advance on the classic Haldane models, which do not predict free gas. The advantage of Suunto RGBM is additional safety through its ability to adapt to a variety of situations and dive proﬁ les.

In order to optimize how to respond to different added risk situations an additional category of stop, referred to as a Mandatory Safety Stop, has been introduced. Also a countdown for the Recommended Safety Stop is included. The combination of stop types will depend on the speciﬁ c dive situation.

To get the most from the safety beneﬁ ts be sure to read the summary of the Suunto Reduced Gradient Bubble Model in chapter 7.2.

1.1. SAFETY PRECAUTIONS

Do not attempt to use Mosquito without reading this instruction manual in its entirety, including all the warnings. Make sure that you fully understand the use, displays and limitations of the instrument. If you have any questions about the manual or the dive computer, contact your SUUNTO dealer before diving with the dive computer.

Always remember that you are responsible for your own safety.

When used properly, the dive computer is an outstanding tool for assisting properly trained, certiﬁ ed divers in planning and executing sport dives. It is not a substitute for certiﬁ ed scuba instruction, including training in the principles of decompression.

Diving with enriched air mixtures (nitrox) exposes the user to risks different from those associated with diving with standard air. These risks are not obvious and require training to understand and avoid. Risks include possible serious injury or death.

Do not attempt to dive with any gas mix other than standard air without ﬁ rst receiving certiﬁ ed training in this specialty.

1.1.1. EMERGENCY ASCENTS

In the unlikely event that Mosquito malfunctions during a dive, follow the emergency procedures provided by your certiﬁ ed dive training agency or, alternatively,

STEP 1: Assess the situation calmly and then move promptly to less than 18 m

STEP 2: At 18 m [60 ft], slow down your ascent rate to 10 m/min [33 ft/min]

STEP 3: Stay there as long as you assess your air supply will safely allow. After

[60 ft].

and move to a depth between 3 and 6 meters [10 to 20 ft].

reaching the surface stay out of the water for at least 24 hours.

1.1.2. DIVE COMPUTER LIMITATIONS

While the dive computer is based on current decompression research and technology, you must realize that the computer cannot monitor the actual physiological functions of an individual diver. All decompression schedules currently known to the authors, including the U.S. Navy Tables, are based on theoretical mathematical models, which are intended to serve as a guide to reduce the probability of decompression illness.

1.1.3. NITROX

Diving with nitrox provides the diver with an opportunity to reduce the risk of decompression illness by reducing the nitrogen content in the breathing gas mix.

However, when the gas mix is altered, the oxygen content of the mix is generally increased. This increase exposes the diver to an oxygen toxicity risk not usually considered in recreational diving. In order to manage this risk, the dive computer tracks the time and intensity of the oxygen exposure and provides the diver with information to adjust the dive plan in order to maintain oxygen exposure within reasonably safe limits.

In addition to the physiological effects of enriched air on the body there are operational considerations to be addressed when handling altered breathing mixes. Elevated concentrations of oxygen present a ﬁ re or explosion hazard. Consult with the manufacturer of your equipment about its compatibility with nitrox.

1.1.4. FREEDIVING

Freediving, and particularly freediving in combination with scuba diving, may have risks that have not been researched and are not commonly known.

Any person who engages in any form of breathhold diving is in danger of shallowwater blackout (SWB) i.e. the sudden loss of consciousness caused by oxygen starvation.

Any breathhold diving results in some nitrogen build-up in the blood and other fast tissues. Due to the short time spent at depth this build-up is generally not signiﬁ cant. Therefore, provided the effort involved in freediving has not been

severe, there is little risk in diving after breathhold diving. However, the converse is more unknown and may increase signiﬁ cantly the risk of DCI. Therefore, FREEDIVING AFTER SCUBA DIVING IS NOT RECOMMENDED. You should avoid freediving and not exceed ﬁ ve meters [16 ft] for at least two hours after scuba diving.

Suunto also recommends you to be trained in freediving technique and physiology before conducting breathhold dives. No dive computer can replace the need for proper dive training. Insufﬁ cient or improper training may cause a diver to commit errors that may lead to serious injury or death.

Fig. 2.1. The push buttons of the Mosquito.

2. GETTING ACQUAINTED

2.1. FUNCTIONS

The MOSQUITO advanced wristop computer is a multipurpose dive instrument and a sport watch featuring several watch and dive computer modes. You can select the dive computer model between the Regular Air Dive Computer (AIR), Enriched Air Nitrox Dive Computer (EAN) and Freediving computer mode (FREE). The AIR/EAN/FREE modes can also be disabled (set to OFF) and the instrument can be used as a sports watch on land or in water.

2.2. PUSH BUTTONS

The Mosquito is controlled with four push buttons as follows (see Fig. 2.1.).

M (MODE)

• To change from a main mode to an other main mode press the mode button.

• To exit from a submode to a main mode press the mode button.

• To activate the electroluminescent backlight hold down the mode button for more than two seconds or one second in the diving mode.

• To accept the settings in the Setting Mode press the mode button.

S (SELECT)

• To select a submode press the select button.

• To select the active segment in the Setting Mode press the select button.

• To select the display in the Logbook Mode press the select button.

• To select the dive planning mode in the dive surface modes.

• To make a special bookmark in the proﬁ le memory during a dive

+, -

• To show the date, seconds or dual time in the time keeping display press the + or - button.

• In the Setting Mode

• to increase the value press the + button

• to decrease the value press the - button.

• To operate the stopwatch see chapter 2.4.2.

• To select the dive in the Logbook Mode

• press the + button to move forward

• press the - button to move backwards.

2.3. WATER CONTACTS

The Mosquito is automatically activated when submerged in water. This function is made possible by the use of water contacts. The water contacts consist of the PC-interface poles and the four push-buttons of the Mosquito (Fig. 2.2). When the PC-interface poles and one of the push-buttons are connected by the conductivity of the water the Surface or Diving Mode is automatically activated.

Contamination or dirt on the PC-interface poles may prevent this automatic operation. It is, therefore, important that the poles are kept clean. The poles can be cleaned with fresh water and a soft brush (e.g. tooth brush).

NOTE: Water or moisture build-up around the wa ter contacts may cause the contact to activate automatically. This can happen, e.g., when washing your hands or sweating. If the water contact activates in the Time Mode, an AC text will appear on display (Fig. 2.3.), and it will be shown until the water con tact deactivates, or the Mosquito enters the Dive Mode automatically. To save the battery power, you should deactivate the water contact by cleaning it and/or drying it with a soft towel.

Fig. 2.2. The water contact and depth sensor.

Fig. 2.3. Active water contact is indicated by the text AC.

Fig. 2.4. The Time Mode is indicated by the TIME text and a mode indicator.

Fig. 2.5. The time keeping display a) the date is displayed b) the seconds are displayed c) the dual time is displayed.

2.4. TIME MODE [TIME]

The Mosquito has dual time, calendar clock, stopwatch and alarm clock functions. The calendar clock and the stopwatch are operated in the Time Mode. The mode is indicated by the TIME text and the mode indicator in the display (Fig. 2.4.). The time, dual time, date and the daily alarm are set in the Setting Mode (see chapter 4).

2.4.1. TIMEKEEPING DISPLAY

The timekeeping display is the primary display of the Mosquito (Fig. 2.5.). When the Time Mode is entered from other modes, the timekeeping display activates within two seconds, if no button is operated.

In other modes (except in the Diving or Stopwatch Modes), if no button is operated within 5 minutes, the Mosquito beeps and returns to the timekeeping display automatically.

Either the date (a), the seconds of the current time (b) or dual time (c) are shown on the bottom line of the timekeeping display. Press the + or - button to select the desired display option. Next time when you enter the timekeeping display, the Mosquito will show the selected option. The TIMER text blinks on the display if the stopwatch is running.

The display is illuminated by holding down the M button for more than two seconds.

To set the time and date, refer to chapter 4.1 ”Setting Time, Date and Dual Time”.

When diving, the dive entry time and date is registered in the Logbook Memory. Remember always to check before diving that the time and date are correctly set, especially when traveling to different time zones.

2.4.2. STOPWATCH [TIMER]

The Stopwatch function is entered by pressing the S button, when the time keeping display is shown. The text TIMEr at the bottom and the mode indicator (TIME) on the left side of the display indicate that you have entered the Stopwatch function (Fig. 2.6.).

The stopwatch of the Mosquito lets you measure elapsed time, split times and the times of two runners. The range of the stopwatch is 9 hours, 59 minutes,

59.9 seconds (Fig. 2.7.). When the range is exceeded the computer watch gives a beep and returns to the time keeping display automatically.

Fig. 2.6. The Stopwatch function is indicated by the TIMEr text and a mode indicator.

Fig. 2.7. The Stopwatch displays hours, minutes and seconds.

Use the + and - buttons to operate the elapsed time measurement, split time measurement or the times of two runners as follows:

Diving with the Mosquito or performing data transfer will stop the stopwatch. However, it is possible to use stopwatch function when diving, if the AIR/EAN/ FREE -diving modes are disabled (set to OFF, see chapter 3.2.).

3. DIVING WITH THE MOSQUITO

In order to familiarize yourself with the menu based functions, Suunto recommends you use your Quick Reference Guide supplied with the Mosquito together with the information in the following chapters.

This section contains instructions on how to operate the dive computer and interpret its displays. You will ﬁ nd that this dive computer is easy to use and read. Each display shows only the data relevant to that speciﬁ c diving situation.

Chapter 3.1. Before Diving contains general instructions for all the dive computer modes. Chapter

3.2. Scuba Diving information for air and enriched air nitrox scuba diving and Chapter 3.3. Free Mode information for freediving.

Fig. 3.1. Chosen Dive Mode.

Fig. 3.2. Startup I. All segments shown.

3.1 BEFORE DIVING

3.1.1. ACTIVATION AND PRE-CHECKS

The instrument can be activated by pressing the M button or it will automatically activate the air diving, nitrox diving or freediving computer mode according to the user selection, if submerged deeper than

0.6 m (2 ft).

The chosen Dive Mode is indicated by the AIR, EAN or FREE texts and mode indicator on the right side of the display (Fig. 3.1.). Next, all display elements will turn on showing mostly ﬁ gure 8’s and graphical elements (Fig. 3.2.). A few seconds later the battery

power indicator is shown and the backlight and the buzzer are activated (Fig. 3.3a.). Next, the screen will display the mode dependent Ready display conﬁ rming that the activation is complete (Fig. 3.4.).

At this time, perform your pre-check making sure that:

• the Mosquito operates and provides a complete display

• the low battery indicator is not on

• the instrument displays correct units

Fig. 3.3. Startup II. Battery power indicator.

• the instrument displays correct temperature and depth (0.0 m [0 ft])

• the buzzer beeps

• you have preset desired displays on the User Deﬁ nable Display Field

• the altitude and personal adjustment settings are correct (Air and EAN modes)

And if set to EAN mode, make sure that:

• the oxygen percentage is adjusted according to the measured Nitrox blend in your cylinder

• the oxygen partial pressure limit is set correctly.

The Mosquito is now ready for diving.

NOTE: The surface interval time does not run before the ﬁ rst dive.

Fig. 3.5. Startup IV. Free mode. Depth and dive time are zero. Pressing +/- button activates alternative display of maximum depth and current time or dive number.

Fig. 3.4. Startup III. Surface mode (Air). Depth and dive time are zero. Pressing +/- button activates alternative display of maximum depth and current time.

After activation of the Dive Mode or after diving, the Mosquito will automatically switch to show the time keeping display within 5 minutes to conserve the battery power, if you do not press any buttons. However, the dive computer functions will remain active until it has calculated that all residual nitrogen has off-gassed. This may take up to 100 hours, as described in chapter 7.1. ”Operating Principles”. However, SUUNTO recommends to turn on the Dive Mode before diving to check the settings, battery warning, etc. and for dive planning.

3.1.2. BATTERY POWER INDICATOR AND LOW BATTERY WARNING

This dive computer has a unique graphic Battery Power Indicator designed to give you an advance notice of impending need to change the battery.

The Battery Power Indicator can always be seen as the Dive Mode is activated. The electroluminescent backlight will be on during the battery check. The following Table and Figure show the various warning levels.

TABLE 3.1. BATTERY POWER INDICATOR

Temperature or an internal oxidation of the battery affects the battery voltage. If the instrument is stored for a long period, the low battery warning may be displayed even though the battery has enough capacity. The low battery warning may also be displayed at low temperatures, even though the battery has enough capacity in warmer conditions. In these cases repeat the battery check procedure.

Fig. 3.6. Low Battery Warning. Battery symbol indicates that the battery is low and battery replacement is recommended.

Fig. 3.7. Bookmark activation. An annotation, Bookmark, is placed in the proﬁ le memory during a dive by pressing the S button (Displayed with Diver Attention symbol.).

After the battery check the Low Battery Warning is indicated by the battery symbol (Fig. 3.6.).

If the battery symbol is displayed in the Surface mode or if the display is faded or weak, the battery may be too low to operate the dive computer and battery replacement is recommended.

NOTE: For safety reasons the backlight cannot be activated when the low battery warning is indicated by the battery symbol.

3.1.3. USER DEFINABLE FUNCTIONS AND ALARMS

This Mosquito has several User Deﬁ nable Functions and depth and time related alarms that you can set according to your personal preference. For example the Mosquito has a patented presetting system for the User Deﬁ nable Display Field in the lower part of the display.

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