en Suunto D4i User’s Guide
1. WELCOME TO THE WORLD OF SUUNTO DIVE COMPUTERS ................. 8 2. WARNINGS, CAUTIONS, AND NOTES .............................................. 9 3. SUUNTO USER INTERFACE ........................................................ 18 3.1. Navigating in the menus ......................................................... 19 3.2. Button symbols and functions ................................................... 21 4. GETTING STARTED .................................................................. 23 4.1.
5.6. Error conditions ................................................................... 5.7. Wireless transmission ............................................................ 5.7.1. Installing the wireless transmitter .......................................... 5.7.2. Pairing and code selection ................................................. 5.7.3. Transmitting data ............................................................ 5.8. DIVE mode settings ......................................................
5.10. Safety Stops ..................................................................... 5.10.1. Recommended Safety Stops ............................................. 5.10.2. Mandatory Safety Stops .................................................. 5.11. Deep stops ....................................................................... 6. DIVING .................................................................................. 6.1. Diving in the AIR mode (DIVE Air) .........................................
7.4. Flying after diving ................................................................. 87 7.5. DIVE PLANNING mode (PLAN NoDec) ....................................... 88 7.5.1. Dive numbering shown during dive planning ............................ 90 7.6. MEMORY mode .................................................................. 90 7.6.1. Dive logbook (MEM Logbook) ............................................. 91 7.6.2. Dive history (MEM History) .................................................
11.3. Patent notice ................................................................... 12. DISCLAIMERS ...................................................................... 12.1. CE ............................................................................... 12.2. EN 13319 ....................................................................... 12.3. EN 250 / FIOH ................................................................. 13. SUUNTO LIMITED WARRANTY ...............................................
1. WELCOME TO THE WORLD OF SUUNTO DIVE COMPUTERS Suunto D4i wristop dive computer is designed to help you get the most out of your diving. Suunto D4i simplifies your diving experience because all the information you need relating to depth, time, optional tank pressure, and decompression status is available on one easy-to-read display. The Suunto D4i User's Guide contains vitally important information which enables you to become familiar with your Suunto wristop dive computer.
2. WARNINGS, CAUTIONS, AND NOTES Throughout this user's guide, important safety icons are displayed.
10 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 conditions that tend to increase the risk of decompression illness (DCI). Therefore, Suunto strongly recommends that the device not be used for any commercial or professional diving activities.
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! Exposure to greater depths increases the risk of oxygen toxicity and decompression illness. WARNING DIVES WITH REQUIRED DECOMPRESSION STOPS ARE NOT RECOMMENDED.
12 WARNING YOU ARE ADVISED TO AVOID FLYING ANY TIME THE COMPUTER COUNTS DOWN THE NO-FLY TIME. ALWAYS ACTIVATE THE COMPUTER TO CHECK THE REMAINING NO-FLY TIME PRIOR TO FLYING! Flying or traveling to a higher altitude within the no-fly time can greatly increase the risk of DCI. Review the recommendations given by Divers Alert Network (DAN).
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.
14 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 DO NOT EXCEED THE MAXIMUM ASCENT RATE! Rapid ascents increase the risk of injury.
WARNING NEVER ASCEND ABOVE THE CEILING! You must not ascend above the ceiling during your decompression. In order to avoid doing so by accident, you should stay somewhat below the ceiling. WARNING DO NOT DIVE WITH A CYLINDER OF ENRICHED AIR IF YOU HAVE NOT PERSONALLY VERIFIED 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.
16 WARNING WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY TAKE ACTION TO REDUCE OXYGEN EXPOSURE. Failure to take action to reduce oxygen exposure after the warning is given can rapidly increase the risk of oxygen toxicity, injury, or death WARNING Suunto recommends that you receive training in Free diving techniques and physiology before conducting breath hold dives. No dive computer can replace the need for proper dive training.
WARNING Always use realistic SAC rates and conservative turn pressures during dive planning. Overly optimistic or erroneous gas planning can result in the exhaustion of breathing gas during decompression or in a cave or a wreck. WARNING ENSURE THE WATER RESISTANCE OF THE DEVICE! Moisture inside the device and/or battery compartment may seriously damage the unit. Only an authorized SUUNTO service center should do service activities.
3.
3.1. Navigating in the menus Suunto D4i has four main operating modes - TIME mode (TIME), DIVE mode (DIVE), PLAN mode (PLAN), and MEMORY mode (MEM). It also has a APNEA TIMER submode, which can be activated from TIME mode. To toggle between the main modes, press the MODE button. To select a submode in DIVE and MEM modes, press the UP/DOWN buttons.
APNEA TIMER SETTINGS Ventilation Increment Repeats TIME DIVE LIGHT SETTINGS Alarm Time Dual Time Date Units Backlight Contrast Tones 20 SETTINGS Nitrox Personal/Altitude Tank Press Pairing Tank Press Alarm Depth Alarm Depth Notify Alarm Dive Time Alarm Surface Time Notify Alarm Sample Rate Deepstop Air Time Units PLAN LIGHT SUB-MODES Air Nitrox Free Off MEM LIGHT LIGHT SUB-MODES Logbook History
3.2. Button symbols and functions The table below explains the main functions of the dive computer's buttons. The buttons and their use is explained in more detail in the relevant sections of the user's guide. Table 3.1.
Symbol Press Main functions UP Long Activate Apnea Timer in TIME mode DOWN Short Toggle between alternative displays Change submode Decrease values DOWN Long Enter Setting mode Toggle between ceiling and remaining air time display DO Button WN DO WN 22
4. GETTING STARTED To get the most out of your Suunto D4i, use some time to personalize it and really make it YOUR computer. Set the correct time and date, the alarms, as well as the unit and backlight settings. Suunto D4i is a very user-friendly dive computer, and you will quickly become familiar with its functions. Make absolutely sure that you know your computer and have it set up as you want it BEFORE getting into the water.
4.1. TIME mode settings The first thing to do with your Suunto D4i is to set the TIME mode shortcuts: the time, alarm, dual time, date, units, backlight, contrast, and tones. The figure below shows how to toggle between different shortcuts in the TIME mode: BETWEEN DIVES YOU CAN CHECK YOUR SURFACE INTERVAL TIME FROM THE TIME MODE SHORTCUTS! NOTE The seconds display reverts to date display after 5 minutes in order to save battery power.
UP UP UP CT LE CT LE SE CT LE SE CT LE SE SE WN WN WN WN WN UP DO DO DO DO DO UP LE DE DE DE DE DE SE MO MO MO MO MO CT The figure below shows how to enter the TIME Settings menu. USE UP AND DOWN BUTTONS TO TOGGLE BETWEEN ALARM, TIME, DUAL TIME, DATE, UNITS, CONTRAST AND TONES.
4.1.1. Setting the alarm The dive computer has a daily alarm function. The alarm can be set to be activated only once, on weekdays or every day. When the daily alarm activates, the screen blinks and the alarm sounds for 60 seconds. Press any button to stop the alarm. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON.
4.1.2. Setting the time In the Time setting mode, you are able to set the hour, minute, and second, as well as choose between a 12 and 24 hour display. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.3. Setting the dual time In the Dual Time setting mode, you are able to select the hour and minute of a dual time, which is useful when traveling to a different time zone. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.4.
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.5. Setting the units In the Units setting mode, you are able to choose whether the units are displayed in either the metric or imperial system (meters/feet, Celsius/Fahrenheit, and so on). ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.6. Setting the backlight In the Backlight setting mode, you are able to turn the backlight ON or OFF and to define how long it stays on for (5, 10, 20, 30, or 60 seconds).
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.7. Setting the contrast In the Contrast setting mode, you are able to set the contrast of the display (the value range is between 0 and 10). ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 4.1.8. Setting the tones In the Tones setting mode, you are able to activate or deactivate the tones.
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. NOTE When the tones are off, there are no audible alarms. 4.2. Stopwatch The Stopwatch function in Suunto D4i measures elapsed and split times. USE DOWN BUTTON TO START STOPWATCH AND TAKE A SPLIT TIME. THE UP BUTTON STOPS THE STOPWATCH. IF YOU HAVE TAKEN SPLIT TIMES, YOU CAN SCROLL THEM BY SHORT PRESSING THE UP BUTTON. LONG PRESSING UP RESETS THE STOPWATCH.
4.3. AC water contacts The water and data transfer contact is located on the side of the case. When submerged, the water contact poles are connected by the conductivity of the water and the “AC” symbol appears on the display. The AC text is shown until the water contact deactivates. AC APPEARS IN THE TOP RIGHT CORNER OF THE DISPLAY, WHEN THE DIVE COMPUTER IS IN CONTACT WITH WATER. THIS ALSO ACTIVATES THE DIVE MODE. Contamination or dirt on the water contact may prevent this automatic activation.
4.4. Apnea Timer You can use the Apnea Timer function for interval training in freediving. To set the Apnea Timer, follow these steps: 1. Long press UP in the TIME mode to enter the Apnea Timer. 2. In the Apnea Timer, long press DOWN to enter settings in which you can define the duration of the ventilation period and the incremental increase/decrease in time for each cycle (repetition). You can adjust values with the UP and DOWN buttons. 3. Short press SELECT, and define the number of cycles. 4.
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5. BEFORE DIVING Do not attempt to use the dive computer without reading this user's guide 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.
In order to optimize the response to different increased risk situations, an additional category of stop, referred to as a Mandatory Safety Stop, has been introduced. The combination of stop types depends on the user settings and the specific dive situation. To get the most from the Suunto Technical RGBM safety benefits, refer to Section 5.8.10. Setting the deep stops and Section 5.11. Deep stops. 5.2.
5.4. Freediving Freediving, and particularly freediving in combination with scuba diving, may present risks that have not been researched and are not commonly known. Anyone who engages in any form of breath hold diving is in danger of shallow-water blackout (SWB), that is, the sudden loss of consciousness caused by oxygen starvation. Any breath hold 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 significant.
Table 5.1. Dive computer alarms Alarm type Sound pattern Duration High priority 2.4 s sound + 2.4 s break Low priority 0.8 s sound + 3.2 s break Table 5.2. Instructional beep Sound pattern Interpretation Ascending Start ascending Descending Start descending The visual information on the dive computer display is shown during the alarm breaks in order to save battery.
Table 5.3. Audible and visual alarm types Alarm type High priority alarm followed by "Start ascending" beep, repeated for the maximum of three minutes. The PO2 value blinks. Alarm reason PO2 value is greater than the adjusted value. Current depth is too deep for the gas in use. You should immediately ascend or change to a gas with a lower oxygen percentage. High priority alarm followed Decompression ceiling depth is exceeded.
Alarm type Alarm reason Low priority alarm followed by Mandatory Deep Stop is violated. You should descend "Start descending" beep, for to complete the Deep Stop. the duration of the Deep Stop violation. The DEEPSTOP symbol blinks and an arrow points downwards. Low priority alarm followed by Mandatory Safety Stop is violated. You should descend "Start descending" beep, re- to complete the Safety Stop. peated for three minutes. An arrow points downwards.
Alarm type Alarm reason Low priority alarm, sounded The OLF value reaches the fixed 80% or 100%. In the two times. The OLF% value DIVE Nitrox mode only. You can acknowledge the blinks if the PO2 value is alarm. greater than 0.5 bar. Low priority alarm, sounded two times. The Maximum depth value blinks. The selected depth (3–120 m / 10–394 ft) is exceeded. The fixed maximum depth (120 m / 394 ft) is exceeded. You can acknowledge the alarm. Low priority alarm, sounded two times.
NOTE When the tones are turned OFF, the alarms are not sounded when an alarm is activated. WARNING WHEN THE OXYGEN LIMIT FRACTION INDICATES THAT THE MAXIMUM LIMIT IS REACHED, YOU MUST IMMEDIATELY TAKE ACTION TO REDUCE OXYGEN EXPOSURE. Failure to take action to reduce oxygen exposure after the warning is given can rapidly increase the risk of oxygen toxicity, injury, or death. 5.6.
When the dive computer is in the permanent Error mode, only the Er warning is shown in the center window. The dive computer does not show times for ascent or stops. However, all the other displays function as before to provide information for ascent. You must immediately ascend to a depth of 3 to 6 m/10 to 20 ft and remain at this depth until air supply limitations require you to surface. After surfacing, you should not dive for a minimum of 48 hours.
3. Attach the regulator to the scuba cylinder and slowly open the valve. Check for leaks by submerging the regulator first stage in water. If leaks are detected, check the condition of the O-ring and sealing surfaces. 5.7.2. Pairing and code selection In order to receive wireless data, the transmitter and the Suunto D4i need to be paired. During the pairing procedure, the dive computer locks on the code that the transmitter has.
1. 2. 3. 4. Ensure that the transmitter is properly attached to the regulator’s HP port and that the regulator is properly attached to the cylinder. Ensure that the Suunto D4i is turned on, and that the wireless integration is enabled in the Suunto D4i settings (Tank Press is set ON. For more information, refer to Section 5.8.3. Setting the tank pressure pairing). If the Suunto D4i is in the TIME mode, enter the DIVE mode by short-pressing the MODE button.
NOTE To pair on the new transmitter code, the Suunto D4i code must be cleared first. To re-pair the transmitter with the new code and the Suunto D4i dive computer: 1. In the DIVE mode of the Suunto D4i, long-press the DOWN button to enter the DIVE settings. Enter the Tank Press Pairing menu (Refer to Section 5.8.3. Setting the tank pressure pairing). Short-press the SELECT button to bypass the tank pressure ON/OFF selection (the tank pressure transmission must remain ON). 2.
4. Take the Suunto D4i unit close to the transmitter (the system must be pressurized to above 15bar/300 psi). The dive computer displays the received new code number and then start displaying the transmitted cylinder pressure. The wireless transmitter indicator (flash symbol) is displayed every time the Suunto D4i receives a valid signal.
Display Indication --- Figure The flash symbol is blinking. Pressure reading exceeds allowed limit (over 360 bar/5220 psi). C no conn Text "no conn" is displayed when the unit receives no data packets from the transmitter. Pressure reading has not been updated for more than one minute. The latest valid pressure reading is displayed intermittently. The flash symbol is not displayed. Transmitter is out of range (>1.2 m/4 ft), in power saving mode or on another channel.
5.8. DIVE mode settings Suunto D4i has several user-definable functions, as well as depth and time-related alarms that you can set according to your personal preferences. The DIVE mode settings are dependent on the dive submode chosen (AIR, NITROX, FREE), so that, for example, nitrox settings are only available in the NITROX submode. The table below shows what DIVE settings are available in each DIVE submode. Table 5.5.
Setting AIR mode NITROX mode Air time X X Units X X FREE mode X UP UP UP CT LE CT LE SE CT CT LE LE SE SE WN WN WN WN WN UP DO DO DO DO DO UP SE LE DE DE DE DE DE SE MO MO MO MO MO CT The figure below shows how to enter the DIVE mode settings menu. USE UP AND DOWN BUTTONS TO TOGGLE BETWEEN DIVE SETTINGS. NOTE Some settings cannot be changed until five (5) minutes has elapsed after the dive.
UP CT LE SE WN UP LE DE SE MO DO WN 50 DE DO NOTE MO CT 5.8.1. Setting the nitrox values 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. In addition, the oxygen partial pressure limit must be set. When in the NITROX setting mode, the maximum operating depth (MOD), based on the chosen setting, will also be displayed.
5.8.2. 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 conditions (refer to Section 5.9.4. Diving at altitude and Section 5.9.5. 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 conservatism.
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.8.4. Setting the tank pressure alarm The tank pressure alarm can be set "ON" or "OFF" and in the range of 10–200 bar. The alarm is the secondary cylinder pressure alarm point. The alarm is activated when the tank pressure drops below the set limit. You can acknowledge this alarm. The 50 bar/700 psi alarm, however, is fixed and cannot be changed. You can acknowledge this alarm. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.8.5.
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.8.6. Setting the depth notify alarm (FREE mode) You can set five independent Depth Notify Alarms to indicate a certain depth, for example, start of free falling or mouth filling in freediving. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.8.7. Setting the dive-time alarm The Dive Time Alarm setting can be activated and used for several purposes to add to your diving safety.
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. With a range of 1–999 minutes, the alarm can be set to your planned bottom time, for example. NOTE ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. WN WN UP CT LE SE DO DO UP LE DE DE SE MO MO CT 5.8.8. Setting the surface time notify alarm (FREE mode) You can set the Surface Time Notify Alarm to indicate the length of the surface time before a new dive.
You can set the dive profile sample rate in free dive to 1, 2, or 5 seconds. The sample rate for nitrox and air dives is 10, 20, 30, or 60 seconds. The factory default setting is 20 seconds. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.8.10. Setting the deep stops In the AIR mode in the Deep Stops setting mode, the Deep stops can be set “ON” or “OFF” depending on whether the Deep stops are used or not. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.8.11.
ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.8.12. Setting the units In the Unit settings you are able to choose between metric (meters/Celsius/bar) and imperial (feet/Fahrenheit/psi) units. ADJUST WITH UP AND DOWN BUTTONS. ACCEPT WITH SELECT BUTTON. 5.9. Activation and pre-checks This section describes how to activate the DIVE mode and explains the pre-checks that it is highly recommended you perform before you get into the water.
5.9.1. Accessing DIVE mode The Suunto D4i has three diving modes: AIR mode for diving with standard air only, NITROX mode for diving with oxygen enriched mixtures, and FREE mode for freediving. There is also a Dive OFF mode for use during other water activities, such as swimming and surfing. 5.9.2. DIVE mode activation Unless the DIVE mode is set OFF, the dive computer activates automatically when submerged deeper than 0.5 m/1.5 ft.
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! Exposure to greater depths increases the risk of oxygen toxicity and decompression illness. NOTE If the Dive mode is set OFF, the unit does not activate automatically. Always check you use the correct Dive mode before entering the water.
At this time, perform your pre-checks, and ensure that: • the instrument operates in the correct mode and provides a complete display (AIR/NITROX/FREE mode) • the battery level is ok. • the altitude, personal adjustment, Deep stops settings are correct. • the instrument displays correct units of measurement (Metric/Imperial). • the instrument displays the correct temperature and depth (0.0 m/0 ft). • the alarm beeps.
5.9.3. Battery power indication Temperature or internal oxidation of the battery affect the battery voltage. If the instrument is stored for a long period, or used in cold temperatures, the low battery warning may be displayed even though the battery has enough capacity. In these cases, reenter DIVE mode to receive the battery power indication. After the battery check, the low battery warning is indicated by the battery symbol.
5.9.4. Diving at altitude The dive computer can be adjusted both for diving at altitude and also to increase the conservatism of the mathematical nitrogen model. When programming the instrument for the correct altitude, you need to select the correct Altitude Adjustment settings according to Table 5.6, Altitude Adjustment settings. The dive computer will adjust its mathematical model according to the entered altitude setting, giving shorter no-decompression times at higher altitudes.
WARNING Traveling to a higher elevation can temporarily cause a change in the equilibrium of dissolved nitrogen in the body. It is recommended that you acclimatize to the new altitude by waiting at least three (3) hours before diving. 5.9.5. Personal adjustments There are personal factors that can affect your susceptibility to DCI, which you can predict in advance, and input into the decompression model. Such factors vary between divers and also for the same diver from one day to another.
This feature is used to adjust the computer to be more conservative, according to personal preference, by entering the suitable Personal Adjustment setting with the help of Table 5.7, Personal Adjustment settings. In ideal conditions, retain the default setting, P0. If conditions are more difficult, or any of the factors which tend to increase the possibility of DCI exist, select P1, or even the most conservative P2.
5.10. Safety Stops Safety Stops are widely considered good diving practice for recreational diving, and are an integral part of most dive tables. The reasons for performing a Safety Stop include: reducing sub-clinical DCI, microbubble reduction, ascent control, and orientation before surfacing. The Suunto D4i displays two different types of Safety Stops: Recommended Safety Stop and Mandatory Safety Stop. LE WN UP SE DE DO NOTE 64 MO CT 5.10.1.
DO WN UP LE DE SE MO CT 5.10.2. Mandatory Safety Stops When the ascent rate exceeds 10 m/33 ft per minute continuously for more than five (5) seconds, the microbubble build-up is predicted to be more than is allowed for in the decompression model. The Suunto RGBM calculation model responds to this by adding a Mandatory Safety Stop to the dive. The time of this Mandatory Safety Stop depends on the severity of the ascent rate excess.
WHEN CEILING AND STOP ARE DISPLAYED WITH DOWNWARD POINTING ARROW, IMMEDIATELY (WITHIN 3 MINUTES) DESCEND TO OR BELOW CEILING. If you continue to violate the Mandatory Safety Stop, the tissue calculation model is affected and the dive computer shortens the available no-decompression time for your next dive. In this situation, it is recommended that you prolong your surface interval time before your next dive. 5.11.
If a deep stop is violated, it does not cause the dive computer to go into an error (Er) mode. However, a penalty time is added to the subsequent decompression. NOTE With Deep Stops ON, the Recommended Safety Stops will still be activated at the end of the dive.
6. DIVING This section contains instructions on how to operate the dive computer and interpret its displays. The dive computer is easy to use and read. Each display shows only the data relevant to that specific diving mode. 6.1. Diving in the AIR mode (DIVE Air) This section contains information on diving with standard air. To activate the DIVE Air mode, please refer to Section 5.9.1. Accessing DIVE mode. DIVE HAS JUST BEGUN AND AVAILABLE NO-DECOMPRESSION TIME IS OVER 99 MINUTES SO NO VALUE IS DISPLAYED.
6.1.1. Basic dive data During a No-decompression dive, the following information is displayed: • your present depth in meters/feet • the available no-decompression time in minutes as NO DEC TIME • the ascent rate presented as a bar graph on the right side DIVE DISPLAY - PRESENT DEPTH IS 15 M, NO-DECOMPRESSION STOP TIME LIMIT 46 MIN. MAXIMUM DEPTH DURING THIS DIVE WAS 21.5 M, ELAPSED DIVE TIME 22 MIN.
UP BUTTON TOGGLES BETWEEN DIVE TIME AND WATER TEMPERATURE. In addition, with the optional wireless transmission enabled: • the Remaining Air time in the left center window indicated as AIR TIME (Air Time must be set ON) • the cylinder pressure in bar (or psi) displayed in the lower left corner • the cylinder pressure graphically displayed on the left side 6.1.2. Bookmark It is possible to record bookmarks in the profile memory during a dive.
6.1.3. Tank pressure data When using the optional wireless pressure transmitter, the pressure of your scuba cylinder in bars (or psi) is shown digitally in the lower left corner of the alternative display. Whenever you start a dive, the remaining air time calculation begins. After 30–60 seconds (sometimes more, depending on your air consumption), the first estimation of remaining air time is shown in the left center window of the display.
NOTE Filling your BCD affects the air time calculation due to the temporary increase in air consumption. NOTE The remaining air time is not displayed when either deep stops or the decompression ceiling have been activated. You can recall the remaining air time by long-pressing the DOWN button, but the ceiling disappears. NOTE A change of temperature will affect the cylinder pressure and consequently the air time calculation.
Continuous ascent rate violations will result in Mandatory Safety Stops. When Recommended Deep Stop is enabled, the length is indicated in seconds. NORMAL ASCENT RATE. WARNING ACTIVATED BACKLIGHT, ALARM AND A BLINKING ASCENT RATE BAR GRAPH INDICATE YOU ARE ASCENDING FASTER THAN 10 M/MIN. YOU ARE ADVISED TO MAKE A MANDATORY SAFETY STOP WHEN YOU REACH A DEPTH OF 6 M. DO NOT EXCEED THE MAXIMUM ASCENT RATE! Rapid ascents increase the risk of injury.
6.1.6. Decompression dives When your NO DEC TIME becomes zero, your dive changes into a decompression dive. Therefore, you must perform one or more decompression stops on your way to the surface. The NO DEC TIME on your display will be replaced by an ASC TIME, and a CEILING notation will appear. An upward pointing arrow will also prompt you to start your ascent. If you exceed the no-decompression limits on a dive, the dive computer will provide the decompression information required for ascent.
• • the time needed at the Mandatory Safety Stop (if any) the time needed to reach the surface after the ceiling and Safety Stops have been completed WARNING YOUR ACTUAL ASCENT TIME MAY BE LONGER THAN DISPLAYED BY THE INSTRUMENT! The ascent time will increase if you: • remain at depth • ascend slower than 10 m/33 ft per minute or • make your decompression stop deeper than at the ceiling These factors will also increase the amount of air required to reach the surface.
The depth of the ceiling and floor depends on your dive profile. The ceiling depth will be fairly shallow when you enter the decompression mode, but if you remain at depth, it will move downward and the ascent time will increase. Likewise, the floor and ceiling may change upwards while you are decompressing. When conditions are rough, it may be difficult to maintain a constant depth near the surface.
Display below the floor The blinking ASC TIME sign and an upward pointing arrow indicate that you are below the floor. You should start your ascent immediately. The ceiling depth is shown on the left side, and the minimum total ascent time on the right side of the center window. Below is an example of a decompression dive without Deep Stops, below the floor. UPWARD POINTING ARROW, BLINKING ASC TIME AND AN ALARM TELL YOU TO ASCEND. MINIMUM TOTAL ASCENT TIME INCLUDING SAFETY STOP IS 9 MINUTES.
Display at the ceiling zone When you reach the ceiling zone, the display will show you two arrows pointing at each other (the “hour glass” icon). Below is an example of a decompression dive at the ceiling zone. TWO ARROWS POINT AT EACH OTHER “HOUR GLASS”. YOU ARE IN THE OPTIMUM CEILING ZONE AT 3 M AND YOUR MINIMUM ASCENT TIME IS 9 MINUTES. During the decompression stop, ASC TIME will count down towards zero. When the ceiling moves upwards, you can ascend to the new ceiling.
DECOMPRESSION DIVE, ABOVE CEILING. NOTE DOWNWARD POINTING ARROW, ER WARNING AND ALARM. YOU SHOULD IMMEDIATELY (WITHIN 3 MINUTES) DESCEND TO OR BELOW CEILING. In addition, an Error warning (Er) reminds you that you have only three (3) 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.
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.
NITROX DIVE MODE ACTIVATION. MAXIMUM OPERATIONAL DEPTH BASED ON SET O2 % (21%) AND PO2 (1.4 BAR) IS 53.6 M. If set to the NITROX mode, the Suunto D4i will additionally show on the alternative display: • the oxygen percentage, labeled O2% • the set oxygen partial pressure limit, labeled PO2 • the current oxygen toxicity exposure, labeled OLF% • maximum depth • current time • water temperature • dive time • tank pressure DOWN BUTTON TOGGLES BETWEEN O2, MAXIMUM DEPTH CURRENT TIME AND TANK PRESSURE.
UP BUTTON TOGGLES BETWEEN PO2, OLF%, DIVE TIME AND WATER TEMPERATURE. 6.2.3. Oxygen limit fraction (OLF%) If set to the NITROX mode, in addition to tracking the diver's exposure to nitrogen, the instrument tracks the exposure to oxygen. These calculations are treated as entirely separate functions. The dive computer calculates separately for Central Nervous System oxygen toxicity (CNS) and Pulmonary Oxygen toxicity, the latter measured by the addition of Oxygen Toxicity Units (OTU).
The free dive ends as soon as you surface (at 0.5 m/ 1.6 ft). NOTE The FREE mode does not provide decompression information. NOTE There is no ascent rate monitoring in the FREE mode. 6.3.1. Day History The Day History function shows the free dive history of your latest diving day. In the SURFACE mode you can enter the Day History by pressing the SELECT button.
The Day History function shows the average depth of all dives, the deepest depth of the day as well as the time, the longest dive, and the cumulative dive time in hours and minutes, as well as the number of dives made during the day. NOTE The first dive of the next day will reset the Day History function and start a new one. 6.3.2. Free dive time limit The FREE mode has a time limit of 10 minutes. After 10 minutes, Suunto D4i will automatically change from Free Dive to Scuba Bottom Timer.
7. AFTER DIVING Once back at the surface, Suunto D4i continues to provide post-dive safety information and alarms. Calculations to enable repetitive dive planning also help to maximize diver safety. Table 7.1. Alarms Symbol on display Indication Diver Attention Symbol - Extend Surface Interval Violated Decompression Ceiling or Too Long Bottom Time Do Not Fly Symbol 7.1. Surface interval An ascent to any depth shallower than 1.2 m/4 ft (0.5 m/1.
Or, in the alternative displays, the following information will be shown: • maximum depth of last dive in meters/feet • dive time of last dive in minutes, shown as DIVE TIME • the current time, shown as TIME • the current temperature in °C/°F • cylinder pressure in bar/psi (if enabled) If set to NITROX mode, the following information will also be shown: • the oxygen percentage labeled O2% • the oxygen partial pressure labeled PO2 • the current oxygen toxicity exposure labeled OLF% 7.2.
7.2.1. FREE Dive Each dive series includes dives that have been performed during one day. The day's dive numbering and latest dive information resets to 0 at midnight, and each day there is a new series of dives that is recorded in the log book. The dive is completed once you ascend beyond 0.5 m. A new dive will be registered in the log book immediately you descend once again. 7.3.
• • • A minimum surface interval of 12 hours would be required in order to be reasonably assured a diver will remain symptom free upon ascent to altitude in a commercial jetliner (altitude up to 2,400 m/8,000 ft). Divers who plan to make daily, multiple dives for several days, or make dives that require decompression stops, should take special precautions and wait for an extended interval beyond 12 hours before a flight.
By pressing the UP/DOWN buttons, you can scroll the no-decompression limits in 3 m/10 ft increments ending at 45 m/150 ft. No-decompression limits longer than 99 minutes are displayed as “—“. During a dive series (between two consecutive dives) it is also possible to enter the surface interval time as a planning parameter. WHEN ENTERING THE PLAN MODE THE DISPLAY FIRST BRIEFLY SHOWS THE REMAINING DESATURATION TIME BEFORE GOING INTO PLAN MODE.
NOTE The DIVE PLANNING mode is disabled in FREE mode and in Error mode (see Section 5.6. Error conditions). Higher Altitude and conservative Personal Adjustment settings will shorten the nodecompression time limits. These limits at different Altitude and Personal Adjustment setting selections are explained in Section 5.9.4. Diving at altitude and in Section 5.9.5. Personal adjustments. 7.5.1.
7.6.1. Dive logbook (MEM Logbook) The Suunto D4i has a very sophisticated, high capacity Logbook and Profile Memory. The data is recorded in the profile memory based on the selected sample rate. The END OF LOGS text is displayed between the oldest and most recent dive. The following information will be shown on three pages: THERE ARE THREE PAGES OF LOGBOOK DIVE INFORMATION. USE SELECT BUTTON TO SCROLL BETWEEN LOGBOOK PAGES I, II, AND III. THE DATA OF THE MOST RECENT DIVE IS SHOWN FIRST.
maximum depth date of dive type of dive (AIR, NITROX, FREE, bottom timer (G)) dive start time dive number oxygen percentage total dive time (in minutes in AIR and NITROX modes, and minutes and seconds in FREE mode) Page II • maximum depth • average depth • consumed pressure (if enabled) • warnings Page III • graphical dive profile • water temperature • tank pressure (if enabled) • • • • • • • 92
NOTE Memory capacity depends on the selected sample rate. With factory default setting (20 s) and without transmitter data the capacity is approximately 140 hours. With transmitter data the capacity is minimum 35 hours. In Dive Free mode the maximum memory capacity is 35 hours. After that, when new dives are added, the oldest dives are deleted. The contents of the memory will remain when the battery is changed (providing that the battery has been replaced according to the instructions).
SCUBA DIVE HISTORY DISPLAY. TOTAL NUMBER OF DIVES, DIVE HOURS AND MAXIMUM DEPTH. NOTE You can reset the maximum depth of scuba dives to 0.0 m/0 ft with the PC-Interface cable and the downloadable Suunto DM4 software. Free Dive History The Free Dive History shows the deepest and the longest dives of all free dives, and the cumulative dive time in hours and minutes, as well as the total number of dives. The Free Dive History can hold a maximum of 999 dives and 99 diving hours 59 minutes.
The Free Dive history gathers history of the entire sequence of free dives. Unlike the day history, the Free Dive History is not reset. 7.7. Suunto DM4 The Suunto DM4 is an optional software that greatly enhances the functionality of your Suunto D4i. With the DM4 software, you can download dive data from your dive computer to your laptop. After that, you can view and organize all the data recorded with your Suunto D4i.
• additional dive information (for example, SLOW and Mandatory Safety Stop violations, Diver Attention Symbol, Bookmark, Surfaced Mark, Decompression Stop Mark, and Ceiling Error Mark) • dive computer serial number • personal information (30 characters) By using the DM4, you are able to enter setup options such as: • input a personal, 30-character field into the Suunto instrument. • manually add comments, multimedia and other personal information to the PCbased dive data files 7.8.
3. Follow the instructions on the DM4 on how to transfer your dives to your Movescount.com account.
8. CARE AND MAINTENANCE OF MY SUUNTO DIVING COMPUTER The SUUNTO dive computer is a sophisticated precision instrument. Although it is designed to withstand the rigors of scuba diving, you must treat it with the same proper care and caution as any other precision instrument. • WATER CONTACTS AND PUSH BUTTONS Contamination or dirt on the water contacts/connector or push buttons may prevent the automatic activation of the Dive Mode and cause problems during the data transfer.
• • • • • • • • Should moisture appear inside the case, immediately have the instrument checked by your SUUNTO service center. The specific scratch guard for D4i is designed to help the display from getting scratched. They can be purchased separately from your nearest retailer. The scratch guard is easy to attach and also to replace if needed (for more information, see the instructions on www.suunto.com).
MAINTENANCE The instrument should be soaked, thoroughly rinsed with fresh water, then dried with a soft towel after each dive. Make sure that all salt crystals and sand particles have been flushed out. Check the display for possible moisture or water. DO NOT use the dive computer if you detect any moisture or water inside. Contact an authorized Suunto service center for battery replacement or other service. CAUTION! • Do not use compressed air to blow water off the unit.
9. BATTERY REPLACEMENT NOTE It is advisable to contact an authorized Suunto service center for battery replacement. It is imperative that the change is made in a proper manner to avoid any leakage of water into the battery compartment or computer. CAUTION When the battery is changed, all nitrogen and oxygen uptake data is lost. Therefore, the no-fly time shown by the computer should have reached zero or you must wait for 48 hours, or preferably up to 100 hours, before you dive again.
9.1.1. Transmitter battery kit The transmitter battery kit includes a 3.0 V CR ½ AA lithium cell battery and a lubricated O-ring. When handling the battery, do not make contact with both of the poles at the same time. Do not touch the metal surfaces of the battery with your bare fingers. 9.1.2. Required tools • A Phillips-head screwdriver • Soft cloth for cleaning 9.1.3. Replacing the transmitter battery To change the transmitter battery: 1. Remove the transmitter from the regulator HP port. 2.
8. Gently insert the new battery into the battery compartment. Check the polarity of the battery. The "+" mark should point toward the top of the compartment and the "-" mark towards the bottom. NOTE It is imperative that you wait at least 30 seconds before reinstalling the transmitter battery. When the battery is re-installed, the transmitter sends an overpressure (“---“) signal on code 12 for 10 seconds, after which it goes to normal operation, and shuts down after five (5) minutes. 9.
10. TECHNICAL DATA 10.1. Technical specifications Dimensions and weight: • Diameter: 50.0 mm/1.97 in • Thickness: 16.0 mm/0.61 in • Weight: 85g/3.0 oz Transmitter: • Max. diameter: 40 mm/1.57 in • Length: 80 mm/3.15 in • Weight: 118 g/4.
Other displays • Dive time: 0 to 999 min, counting starts and stops at 1.2 m /4 ft depth • Surface time: 0 to 99 h 59 min • Dive counter: 0 to 99 for repetitive dives • No-decompression time: 0 to 99 min (- - after 99) • Ascent time: 0 to 199 min (- - after 199) • Ceiling depths: 3.0 to 100 m /10 to 328 ft • Air time: 0 to 99 min (- - after 99) Temperature display: • Resolution: 1°C/1°F • Display range: -20 to +50°C/-9 to +122°F Display range: -9 to +50°C/-9 to +122°F • Accuracy: ± 2°C/± 3.
• Memory capacity: approximately 140 hours of diving with 20 second recording interval and without transmitter data. In Dive Free the memory capacity is maximum 35 hours. • Depth resolution: 0.3 m/1 ft Operating conditions: • Normal altitude range: 0 to 3,000 m/10,000 ft above sea level • Operating temperature: 0°C to 40°C/32°F to 104°F • Storage temperature: -20°C to +50°C/ -4°F to +122°F It is recommended that the instrument be stored in a dry place at room temperature.
• • • Battery storage time (shelf life): Up to three years Replacement: Every two years, or more often depending on dive activity Life expectancy at 20°C/68°F: • 0 dives/year –> 2 years • 100 dives/year –>1.5 years • 300 dives/year –>1 year Transmitter: • One 3V lithium battery: 1/2AA O-ring 2.00 mm x 2.
NOTE Low temperature or an internal oxidation of the battery may activate the battery warning even though the battery has enough capacity. In this case, the warning usually disappears when the DIVE mode is activated again. 10.2. Suunto RGBM The Suunto Reduced Gradient Bubble Model (RGBM) is a modern algorithm for predicting both dissolved and free gas in the tissues and blood of divers. It was developed in co-operation between Suunto and Bruce R. Wienke BSc, MSc, PhD.
10.2.1. Suunto RGBM adaptive decompression The Suunto RGBM algorithm adapts its predictions of both the effects of microbubble build-up and adverse dive profiles in the current dive series. It also changes these calculations according to the personal adjustment you select. The pattern and speed of decompression at the surface is adjusted according to microbubble influence. On repetitive dives, adjustment may also be applied to the maximum allowable nitrogen overpressure in each theoretical tissue group.
10.2.2. No-decompression limits for air The no-decompression limits displayed by the dive computer for the first dive to a single depth (see Table 10.1, No-decompression time limits for various depths (m) and Table 10.2, No-decompression time limits for various depths (ft)), are slightly more conservative than those permitted by the U.S. Navy tables. Table 10.1.
No-decompression time limits (mins) for various depths (m) for the first dive of a series Depth (m) 36 39 42 45 Personal Mode / Altitude Mode P0/A0 10 8 6 5 P0/A1 P0/A2 P1/A0 P1/A1 P1/A2 P2/A0 P2/A1 P2/A2 6 5 4 3 4 3 3 2 9 8 6 5 5 4 4 3 3 3 3 2 9 7 5 4 5 4 3 3 3 3 2 2 Table 10.2.
No-decompression time limits (mins) for various depths (ft) for the first dive of a series Depth (ft) Personal Mode / Altitude Mode P0/A0 P0/A1 P0/A2 P1/A0 P1/A1 P1/A2 P2/A0 P2/A1 P2/A2 90 100 110 21 17 12 13 10 7 8 5 4 19 15 11 11 9 7 7 5 4 18 13 10 10 8 6 6 5 4 120 130 140 150 10 8 6 5 6 5 4 3 4 3 3 2 9 7 6 5 5 4 4 3 3 3 2 2 8 6 5 4 5 4 3 3 3 3 2 2 10.2.3. Altitude diving The atmospheric pressure is lower at high altitudes than at sea level.
As a result, the allowed no-decompression-stop limits are considerably reduced. 10.3. Oxygen exposure The oxygen exposure calculations are based on currently accepted exposure time limit tables and principles. In addition to this, the dive computer uses several methods to conservatively estimate the oxygen exposure. For example: • The displayed oxygen exposure calculations are raised to the next higher percentage value. • The CNS % limits up to1.
11. INTELLECTUAL PROPERTY 11.1. Trademark Suunto is a registered trademark of Suunto Oy. 11.2. Copyright © Suunto Oy 08/2012. All rights reserved. 11.3. Patent notice Patents have been issued or applied for one or several features of this product.
12. DISCLAIMERS 12.1. CE The CE mark is used to mark conformity with the European Union EMC directive 89/336/EEC. 12.2. EN 13319 EN 13319 is a European diving depth gauge standard. Suunto dive computers are designed to comply with this standard. 12.3. EN 250 / FIOH The tank pressure gauge and dive instrument parts used in measuring the tank pressure meet the requirements set in the section of the European Standard EN 250 that concern tank pressure measurements. FIOH, notified body no.
13. SUUNTO LIMITED WARRANTY Suunto warrants that during the Warranty Period Suunto or a Suunto Authorized Service Center (hereinafter Service Center) will, at its sole discretion, remedy defects in materials or workmanship free of charge either by a) repairing, or b) replacing, or c) refunding, subject to the terms and conditions of this Limited Warranty. This Limited Warranty is only valid and enforceable in the country of purchase, unless local law stipulates otherwise.
serial number has been removed, altered or made illegible in any way, as determined at the sole discretion of Suunto; 4. has been exposed to chemicals including but not limited to mosquito repellents. Suunto does not warrant that the operation of the Product will be uninterrupted or error free, or that the Product will work in combination with any hardware or software provided by a third party. Access to Suunto warranty service Register your item at www.suunto.
14. DISPOSAL OF THE DEVICE Please dispose of the device in an appropriate way, treating it as electronic waste. Do not throw it in the garbage. If you wish, you may return the device to your nearest Suunto representative.
GLOSSARY Altitude dive A dive made at an elevation greater than 300 m/1000 ft above sea level. Ascent rate The speed at which the diver ascends toward the surface. ASC RATE Abbreviation for ascent rate. Ascent time The minimum amount of time needed to reach the surface on a decompression stop dive. ASC TIME Abbreviation for ascent time. Ceiling On a decompression stop dive, the shallowest depth to which a diver may ascend based on computed nitrogen load.
Decompression illness Any of a variety of maladies resulting either directly or indirectly from the formation of nitrogen bubbles in tissues or body fluids, as a result of inadequately controlled decompression. Commonly called "the bends" or "DCI". Dive series A group of repetitive dives between which the dive computer indicates some nitrogen loading is present. When nitrogen loading reaches zero the dive computer deactivates.
Multi level dive A single or repetitive dive that includes time spent at various depths and whose no decompression limits are therefore not determined solely by the maximum depth attained. Nitrox In sports diving, refers to any mix with a higher fraction of oxygen than standard air. NOAA United States National Oceanic and Atmospheric Administration.
PFO Abbreviation for patent foramen ovale. It is a form of congenital heart defect that enables blood flow between the left and right atria via the interatrial septum. PO2 Abbreviation for oxygen partial pressure. RGBM Abbreviation for Reduced Gradient Bubble Model. Reduced Gradient Bubble Model Modern algorithm for tracking both dissolved and free gas in divers. Repetitive dive Any dive whose decompression time limits are affected by residual nitrogen absorbed during previous dives.
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