Display states and views

Suunto DX has four main modes: time, dive, planning and memory. Change modes by pressing MODE.

Unless Dive mode is turned off, Suunto DX automatically switches to dive mode if you are more than 1.2 m (4 ft) under water.

Time and dive modes have different views in the bottom row which you can scroll through with DOWN and UP.

Set up

To get the most out of your Suunto DX, take some time to read this manual and familiarize yourself with the modes and settings. Make absolutely sure you have it set up as you want before getting into the water.

To get started:

1. Wake up the device by keeping any button pressed until the display turns on.
2. Keep DOWN pressed to enter General Settings.
3. Set time. See Time.
4. Set date. See Date.
5. Set units. See Units.
6. Press MODE to exit settings.

The default dive mode is Air. For more information on dive modes, see Dive modes.

Icons

Suunto DX uses the following icons:

Software version check

Please note that this user guide is for the latest software version of Suunto DX. If you have an older version, some features operate differently.

To check the software version:

1. Keep DOWN pressed to enter settings.
2. Press DOWN to scroll to Version and enter with SELECT.
3. The first line of information indicates the software version.
4. If the version number is V1.5.x or higher, you can skip the rest of this section and read the user guide as normal.
5. If the version number is V1.2.x please read the sections below regarding how to use specific features.
6. Press MODE twice to exit settings.

Dive modes

Each time you enter dive mode, you have the option of selecting which mode to use.

To change dive modes:

1. While in time mode, press MODE to enter dive mode.
2. Scroll to the dive mode you want to use with UP or DOWN.
3. Wait for the pre-checks to complete.

To change settings for a dive mode, keep DOWN pressed while in that mode. For further information about dive mode settings, please refer to the respective dive mode section of this user guide.

Stopwatch

Access the stopwatch in time or dive mode as explained in Stopwatch.

To use the stopwatch:

1. Press DOWN to start the stopwatch.
2. While the stopwatch is running, press DOWN to take split times.
3. Press UP to stop the stopwatch.
4. Keep UP pressed to reset the stopwatch.

Compass calibration

When you first use the compass, you are prompted to calibrate the compass.

To calibrate the compass:

1. When you see the text Rotate 360°, hold the watch level and slowly rotate the watch in a complete circle, keeping display facing up the whole time.
2. When you see the text Tilt 90°, slowly tilt the watch up to a vertical position so that the display is facing you.

Product compatibility

Suunto DX can be used together with Suunto Wireless Tank Pressure Transmitter for wireless transmission of tank pressure to the dive computer.

You may also connect this dive computer to a PC or Mac with the supplied USB cable and use Suunto DM5 to modify device settings, plan dives, as well as update the dive computer software.

Do not use this dive computer with any unauthorized accessories or equipment not authorized or officially supported by Suunto.

Activation and pre-checks

Unless the dive mode turned off, the dive mode activates automatically when you dive deeper than 1.2 m (4 ft). However, you should switch to dive mode before diving to check altitude and personal settings, battery condition and so on.

Each time your Suunto DX enters dive mode, a series of automatic checks are performed. All graphical display elements are turned ON, and the backlight and the beep are activated. After this, your altitude and personal settings are displayed along with the maximum operating depth (MOD), gas content, and PO₂ values. Then the battery level is checked.

Between consecutive dives, the automatic checks also show current tissue saturation.

Before leaving on a dive trip, it is highly recommended that you switch to dive mode to make sure everything is functioning properly.

After the automatic checks, Suunto DX enters surface mode. At this point, you should perform your manual checks before entering the water.

Ensure that:

1. Suunto DX is in the correct mode and provides complete displays.
2. Altitude setting is correct.
3. Personal setting is correct.
4. Deepstops are set correctly.
5. Unit system is correct.
6. Correct temperature and depth are shown.
7. The alarm beeps.

Wireless Transmitter pre-check

If the optional wireless tank pressure transmitter is used, check that:

1. Tank gas and O₂ settings are correct.
2. The transmitter is properly installed and the tank valve is open.
3. The transmitter and Suunto DX are paired.
4. The transmitter is sending data (wireless transmission icon blinks, tank pressure is displayed).
5. There is no transmitter low battery warning.
6. There is enough gas for your planned dive. Check the pressure reading against your back-up pressure gauge.

Battery indicators

Temperature or internal oxidation can affect the battery voltage. If you store your Suunto DX for a long period or use it in cold temperatures, the low battery warning may appear even though the battery has enough capacity.

In these cases, re-enter dive mode and check the battery power. If the battery is low, the Low Battery warning comes on.

If the low battery icon appears in surface mode, or if the display looks faded, the battery may be too low. Battery replacement is recommended.

Alarms, warnings and notifications

Suunto DX has audible and visual alarms designed to let you know when important limits or presets are being reached.

The two audible alarm types indicating high or low priority:

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

In addition, there are three audible guidance notifications:

Instructional beep	Sound pattern	Interpretation
Ascending		Start ascending
Descending		Start descending
Descending-ascending		Change gas

Suunto DX displays information during the alarm breaks in order to save battery life.

High priority alarms:

Low priority alarms:

Visual alarms

Symbol on display	Indication
	Attention - extend surface interval
Er	Violated decompression ceiling or bottom time is too long
	Do not fly

Ascent rate

The ascent rate is displayed as a vertical bar along the right side of the display.

When the maximum allowed ascent rate is exceeded, the lower segment of the bar starts to blink and the top segment stays solid.

Continuous ascent rate violations result in mandatory safety stops. See Safety stops and deepstops .

Backlight

To active the backlight while diving, press MODE.

Otherwise, keep MODE pressed until the backlight activates to use the backlight.

You can define how long the backlight stays on when you activate it or turn the backlight off altogether.

To set backlight duration:

1. While in time mode, keep DOWN pressed.
2. Press DOWN to scroll to Backlight and press SELECT.
3. Set duration or turn off with DOWN or UP.
4. Press MODE to save and exit to settings.

Bookmarks

At any time during a dive, you can add a bookmark to the dive log by pressing SELECT.

You can view bookmarks when scrolling the dive profile in the logbook.

Each bookmark records present depth, time, water temperature, heading (if the compass is enabled), and tank pressure (if available).

Calendar clock

The calendar clock is the default mode of Suunto DX .

Time

In the time settings, you can set the hours, minutes, seconds, and format (12 or 24-hour).

To set time:

1. While in time mode, keep DOWN pressed.
2. Press UP to scroll to Time and press SELECT.
3. Set hours with DOWN or UP and confirm with SELECT.
4. Repeat for minutes and seconds. Set the format with DOWN or UP and confirm with SELECT.
5. Press MODE to exit.

Date

The date and weekday are shown in the bottom row of time mode. Press DOWN to toggle between views.

To set the date:

1. While in time mode, keep DOWN pressed.
2. Press UP to scroll to Date and press SELECT.
3. Set year with DOWN or UP and accept with SELECT.
4. Repeat for month and day.
5. Press MODE to exit.

Units

In the units setting, choose whether the units are displayed in the metric or Imperial system.

1. While in time mode, keep DOWN pressed.
2. Press UP to scroll to Units and press SELECT.
3. Press DOWN to toggle between Metric and Imperial and confirm with SELECT.
4. Press MODE to exit.

Dual time

Dual time allows you to keep track of the time in a second time zone. Dual time is shown in the bottom left of the time mode display by pressing DOWN.

To set dual time:

1. While in time mode, keep DOWN pressed.
2. Press UP to scroll to Dual Time and press SELECT.
3. Set hours with DOWN or UP and confirm with SELECT.
4. Repeat for minutes.
5. Press MODE to exit.

Alarm clock

Suunto DX has a daily alarm which can be set to activate 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.

To set the daily alarm:

1. While in time mode, keep DOWN pressed.
2. Press UP to scroll to Alarm and press Select.
3. Select alarm activation with DOWN or UP and confirm with Select. The options are Off, Once, Weekdays, or Every Day.
4. Set hours with DOWN or UP and confirm with SELECT.
5. Repeat for minutes.
6. Press MODE to exit.

Compass

Suunto DX includes a digital compass.

The tilt-compensated compass gives you accurate readings even if the compass is not horizontally level.

The compass can be activated from either time or dive mode and shows the current bearing and depth.

1. While in TIME or DIVE mode, keep SELECT pressed to activate the compass.

2. Press MODE to exit the compass display. If you are underwater, keep [SELECT] pressed to exit.

When in dive mode, the compass display includes additional information in the bottom left and right views.

1. Press DOWN to scroll through the bottom left views. (tank pressure, max. depth, time)
2. Press UP to scroll through the bottom right views. (dive time, temperature, bearing)

Calibrating compass

When you first start using Suunto DX, the compass needs to be calibrated. Suunto DX displays the calibration icon when you enter the compass.

Calibrate the compass by slowly rotating the unit in your hand in large figure-8 loops..

During the calibration process, the compass adjusts itself to the surrounding magnetic field.

If the calibration fails,Try Again appears. If calibration continues to fail, move to another location and try again.

When traveling overseas, it is recommended that you recalibrate the compass at the new location before using it.

To manually start the calibration:

1. While in the compass view, keep DOWN pressed.
2. Press DOWN to scroll to Calibration.
3. Press SELECT to start the calibration.

Setting declination

You should always adjust your compass declination for the area where you are diving to get accurate heading readings. Check the local declination from a trusted source and set the value in Suunto DX.

1. While in the compass view, keep DOWN pressed.
2. Press DOWN to scroll to Declination and press SELECT.
3. Press DOWN to toggle to East or West and confirm with SELECT.
4. Set Declination Degrees with DOWN or UP.
5. Press MODE to save and exit.

Setting compass timeout

You can define how long the compass stays on after you have activated it. Reset the timeout with any button press while using the compass.

After the timeout, the Suunto DX returns to time or dive mode.

To set the timeout:

1. While in the compass display, keep DOWN pressed.
2. Press DOWN to scroll to Timeout and press SELECT.
3. Adjust the timeout time with DOWN or UP.
4. Press MODE to exit.

Setting bearing lock

A bearing is the angle between north and your target. In simple terms, it is the direction you want to travel. Your heading, on the other hand, is your actual direction of travel.

The default bearing is North.

You can set a bearing lock to help you orientate yourself underwater and ensure you maintain your direction of travel. For example, you can set a bearing lock for the direction to a reef before leaving the boat.

The last locked bearing is stored and available the next time the compass is activated. In Dive mode, the locked bearings are also stored in the log. To lock a bearing:

1. With the compass active, hold the watch in front of you and turn yourself towards your target.
2. Press SELECT to lock the current degree displayed on the watch as your bearing.
3. Press SELECT to clear the lock.

If, at any point, your bearing moves outside the compass display, right or left arrows appear to show turn direction.

Suunto DX provides help for navigating square and triangular patterns, as well as navigating a return heading with the following symbols.

Symbol	Explanation
	You are traveling towards the locked bearing.
	You are 90 (or 270) degrees from the locked bearing.
	You are 180 degrees from the locked bearing.
	You are 120 (or 240) degrees from the locked bearing.

Decompression dives

If you exceed the no-decompression limit on a dive, when NO DEC TIME reaches zero, your dive changes into a decompression dive. Therefore, you must perform one or more decompression stops on your way to the surface.

When the decompression dive starts, the NO DEC TIME on your display is replaced by ASC TIME, and a CEILING indicator appears. An upward pointing arrow also prompts you to start your ascent.

Suunto DX provides the decompression information required for ascent with two key values:

• CEILING: depth that you should not go above
• ASC TIME: optimum ascent time in minutes to surface with defined gases

If you exceed the no-decompression limits on a dive, the dive computer provides the decompression information required for ascent along with subsequent details that are updated as you ascend.

In other words, rather than requiring you to make stops at fixed depths, the dive computer lets you decompress within a range of depths. This is known as continuous decompression.

Ceiling, ceiling zone, floor and decompression range

Before you do a decompression dive, you need to understand the meaning of ceiling, ceiling zone, floor, and decompression range. You need to understand these concepts to be able to correctly interpret the guidance provided by the dive computer.

• The ceiling is the shallowest depth to which you should ascend when doing decompression.
• The ceiling zone is the optimum decompression depth range. It is the range between the ceiling depth and 1.2 m (4 ft) below that ceiling.
• The floor is the deepest depth at which the decompression stop time does not increase. Decompression starts when you pass this depth during your ascent.
• The decompression range is the depth range between the ceiling and floor. Within this range, decompression takes place. However, it is important to remember that the decompression slower at or close to the floor compared to the ceiling zone.

The depth of the ceiling and floor depends on your dive profile. The ceiling depth is fairly shallow when you first enter the decompression dive. But if you remain at depth, the ceiling depth moves downward, and the ascent time increases. The opposite is also true: the floor and ceiling depths may change upwards while you are decompressing.

When conditions are rough, it may be difficult to maintain a constant depth near the surface. In such cases, it is more manageable to maintain a depth somewhat below the ceiling, to ensure that the waves do not lift you above the ceiling. Suunto recommends that you decompress deeper than 4 m (13 ft), even if the indicated ceiling is shallower.

Ascent time

The ascent time shown on your dive computer is the minimum amount of time needed to reach the surface on a decompression dive. This includes:

• Time required to do deepstops
• Ascent time from depth at an ascent rate of 10 m (32.8 ft) per minute
• Time needed for decompression
• Time needed for extra safety stops if ascending too fast during the dive

Decompression guidance

On a decompression dive, there can be three kinds of stops:

• Safety stop
• Deepstop
• Decompression stop

Though not recommended, you may break (ignore) deepstops and safety stops. Suunto DX penalizes such actions with additional stops or other measures, either during the dive or on following dives. For more information, see Safety stops and deepstops.

Suunto DX shows the ceiling value always from the deepest of these stops. Deepstop and safety stop ceilings are always at constant depth when you are at the stop. Stop time is counted down in minutes and seconds.

With decompression stops, the ceiling is always decreasing while you are near the ceiling depth, providing continuous decompression with optimum ascent time.

Below the floor

The blinking ASC TIME text and an upward arrow indicate that you are below the floor. A low priority alarm will also sound. You should start your ascent immediately. The ceiling depth is shown on the left side of the center field, and the minimum total ascent time on the right side.

Below is an example of a decompression dive with a ceiling of 3 m and total ascent time of 9 minutes.

Above the floor

When you ascend above the floor, the ASC TIME text stops blinking and the upward arrow disappears, as shown below.

This indicates you are in the decompression range. Decompression begins, but slowly. Therefore, you should continue your ascent.

At the ceiling

When you reach the ceiling zone, the display will show you two arrows pointing at each other as shown below.

During the decompression stop, your total ascent time continues to count down towards zero. If the ceiling moves upwards, you can ascend to the new ceiling.

You may surface only after ASC TIME and CEILING have disappeared. This means that the decompression stop and any mandatory safety stop have been completed.

You are advised, however, to stay below the ceiling until the STOP text has also disappeared. This indicates that the three (3) minute recommended safety stop has also been completed.

Above the ceiling

If you ascend above the ceiling during a decompression stop, a downward arrow appears in from of the ceiling depth, and a continuous beeping starts.

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 goes into a permanent error mode (Error state (algorithm lock)).

Depth alarm

By default the depth alarm sounds at 30 m (100 ft). You can adjust the depth according to your personal preference or switch it off.

To adjust the depth alarm:

1. While in a dive mode, keep DOWN pressed to enter settings.
2. Press UP to scroll to Depth Alarm and press SELECT.
3. Press UP to toggle the alarm on/off and confirm with SELECT.
4. Adjust depth with DOWN or UP and accept with SELECT.
5. Press MODE to exit.

When the depth alarm activates, the backlight blinks and the low priority audible alarm pattern sounds. Acknowledge the alarm by pressing any button.

Display contrast

You can adjust the contrast of the display according to your preference or, for example, to suite changing dive conditions.

1. While in time mode, keep DOWN pressed.
2. Press UP to scroll to Contrast and press Select.
3. Use DOWN or UP to change the contrast from 0 (lowest) to 10 (highest).
4. Press MODE to exit.

Dive history

Suunto DX has a detailed logbook and dive history available in memory mode.

The logbook contains a sophisticated dive profile for each recorded dive. The time between each data point saved in the log is based on the configurable sample rate (see Sample rate).

The dive history is a summary of all recorded dives.

To access dive history:

1. Press MODE until you come see MEM.
2. Switch between History and Logbook with DOWN or UP.
3. When you are viewing the history or logbook, you can press MODE to go back and select the other one. Press MODE a second time to exit.

History

Scuba dive history shows you a summary of the following:

• Dive hours
• Total number of dives
• Maximum depth

The scuba dive history records a maximum of 999 dives and 999 diving hours. When these limits are reached, the counters reset to zero.

Logbook

To access the logbook:

1. Press MODE three time until you come to MEM mode.
2. Press UP to select Logbook.
3. Press DOWN or UP to scroll to the log you wish to look at and press SELECT.
4. Press SELECT to scroll through the pages.
5. Press MODE to exit.

Each log has three pages:

1. Main page

• maximum depth
• date of dive
• type of dive (indicated by first letter of dive mode, e.g. A for Air mode)
• dive start time
• dive number – from oldest to newest
• gas percentage(s) of the first used gas mix
• total dive time (in minutes in all modes)
• Surface time and warnings page

• maximum depth
• surface time after previous dive
• average depth
• consumed pressure (if enabled)
• warnings
• OLF% (if applicable)
• Dive profile graph

• water temperature
• tank pressure (if enabled)
• gas changes
• setpoint changes
• depth/time profile of the dive

Press UP to step through the dive profile graph or keep UP pressed to auto-scroll.

The dive profile graph shows point by point dive information such as depth, compass heading, decompression info, ceiling and ascent time.

The End of Logs text is displayed between the oldest and most recent dive.

The logbook capacity depends on the sample rate.

If the memory is full, when new dives are added, the oldest dives are deleted.

The contents of the memory remain when the battery is changed (providing that the battery has been replaced according to the instructions).

Dive modes

Suunto DX has the following dive modes:

• Air: for diving with regular air
• Mixed: for diving using oxygen-enriched and helium gas mixtures
• CCR: for rebreather diving
• Gauge: for using the dive computer as a bottom timer
• Off: turns dive mode off completely; the dive computer does not automatically switch the dive mode when submerged and dive planning mode is hidden

By default, Air mode is activated when you enter dive mode. You can change which mode is activated or turn dive mode off under the general settings.

To change dive modes:

1. While in time mode, keep DOWN pressed.
2. Press SELECT to enter Dive Mode.
3. Change to the desired mode with UP or DOWN and confirm with SELECT.
4. Press MODE to exit.

Each dive mode has its own settings which you need to adjust while in the given mode.

To modify dive mode settings:

1. While in a given dive mode, keep DOWN pressed.
2. Press DOWN or UP to scroll through the settings.
3. Press SELECT to enter a setting.
4. Adjust the setting with DOWN or Up and confirm with SELECT.
5. Press MODE to exit.

Air mode

Air mode is for diving with regular air and has the following settings:

• Personal/altitude adjustment (see Personal and altitude adjustments)
• Tank pressure (see Tank pressure)
• Tank pressure alarm (see Tank pressure alarm)
• Depth alarm (see Depth alarm)
• Dive time alarm (see Dive time alarm)
• Sample rate (see Sample rate)
• Deepstop (see Safety stops and deepstops)
• Air time (see Air time)

Mixed mode

Suunto DX has a mixed dive mode for diving with oxygen and/or helium mixture in an open system.

Mixed mode has the following settings available:

• Gases
• Personal/altitude adjustment (see Personal and altitude adjustments)
• Tank pressure pairing (see Tank pressure)
• Tank pressure alarm (Tank pressure alarm)
• Depth alarm (see Depth alarm)
• Dive time alarm (see Dive time alarm)
• Sample rate (see Sample rate)
• Air time (see Air time)

In mixed mode, the default setting is standard air (21% O₂ and 0% He), and oxygen partial pressure (PO₂) is 1.4 bar (20 psi).

The default setting for maximum oxygen partial pressure is 1.4 bar (20 psi). Valid values are 0.5-1.6 bar (7-23 psi).

Changing gases on multi-gas dives

If you have using more than one gas on a dive, Suunto DX allows you to change enabled gas mixes during the dive.

A dive is always started with Mix1. You can change to another enabled mix that is within the set maximum oxygen partial pressure. The tissue calculation during the dive is based on the mixes you have selected as Primary gases.

To change gases during a dive:

1. Keep UP pressed.
2. Scroll through the enabled mixes with UP or DOWN and select the gas you want to use with by pressing SELECT.

The mix number, O₂% and PO₂ for the mixes are shown when scrolling. If the set PO₂ limit is exceeded, the PO₂ value blinks. You cannot change to the gas in this case. The mix is shown, but you cannot select it to use.

When ascending, Suunto DX prompts you to change gas when the PO₂ level you have set for the next mix allows a gas change.

CCR mode

CCR mode is a dive mode dedicated to rebreather diving.

The CCR mode has the following settings:

• CC gases (see Closed-circuit gases)
• OC gases (see Open-circuit gases)
• Setpoints (see Setpoints)
• Personal/altitude adjustment (see Personal and altitude adjustments)
• Tank pressure pairing (see Tank pressure )
• Tank pressure alarm (see Tank pressure alarm)
• Depth alarm (see Depth alarm)
• Dive time alarm (see Dive time alarm)
• Sample rate (see Sample rate)

In CCR mode you can define up to three diluent gases and up to eight bailout gas mixes. Use the setpoint settings to define your high and low set points and switch depths (see Setpoints).

Closed-circuit gases

On a rebreather dive, you need at minimum two closed-circuit gases: one is your pure oxygen tank, and the other is a diluent.

The correct oxygen and helium percentages of the diluent gas(es) in your diluent cylinder(s) must always be entered into the dive computer (or through DM5) to ensure correct tissue and oxygen calculation. Diluent gas(es) used on a rebreather dive are found under CC gases in the main menu.

To modify diluent gases

1. While in CCR mode, keep DOWN pressed to enter settings.
2. Press SELECT to enter CC Gases settings.
3. Diluent 1 is displayed and is always on (cannot be turned off).
4. Press SELECT to move to the oxygen setting.
5. Adjust oxygen percentage with DOWN or UP and confirm with SELECT.
6. Continue with adjusting helium percentage and PO₂ value.
7. After pressing SELECT to confirm the PO₂ value, press UP to move to the next diluent.
8. Repeat steps 4 and 5 for each diluent.
9. Press MODE to exit.

Open-circuit gases

As with closed-circuit gases, you must always define the correct oxygen and helium percentages of open-circuit gases (bailout gases) to ensure correct tissue and oxygen calculation.

Follow the same procedure as the CC gases to define your open-circuit gases under the OC Gases settings.

After entering values for Mix1, you can create additional mixes,Mix2 to Mix8. Each additional mix can be primary, secondary, or off. Mix1 is always set as a primary gas.

To minimize the risk of error during a dive, it is highly recommended that the mixes are set in the proper order. This means that as the mix number rises, so does oxygen content. This is the order they are usually used during the dive. Before a dive, only enable the mixes you actually have available and remember to check the set values to ensure they are correct.

The ascent time is calculated based on the assumption that you start the ascent profile immediately 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 ascent time.

Showing the most pessimistic ascent schedule during a long dive may result in the ascent time no longer fitting the reserved field, and the dive watch displays '––'.

Setpoints

In CCR mode there are two setpoint values that you can set, low and high. Typically you do not need to modify the default setpoint values. However, you can change them as needed either in DM5 or under the CCR mode settings.

• Low set point: 0.4 – 0.9 (default: 0.7)
• High set point: 1.0 – 1.6 (default: 1.3)

To change set point values:

1. While in CCR mode, keep DOWN pressed.
2. Press UP to scroll to Setpoint and press SELECT.
3. Press DOWN or UP to choose Low Setpoint and press SELECT.
4. Press DOWN or UP to set value for PO₂ and accept with SELECT.
5. Repeat steps 2-4 for High Setpoint if necessary.
6. Press MODE to exit.

Setpoint switching

You can use automatic or manual setpoint switching. The automatic low setpoint switch depth is 4.5 m (15 ft) by default, and the high setpoint switch depth is 21 m (70 ft).

The auto setpoint switching is off by default for the low setpoint and on for the high setpoint.

To modify setpoint switching:

1. While in CCR mode, keep DOWN pressed.
2. Press UP to scroll to Switch High and press SELECT.
3. Press DOWN or UP to to toggle On/Off and press SELECT.
4. Press DOWN or UP to set value for for Switch High in meters (m).
5. Press SELECT to save
6. Repeat steps 2-4 for Switch Low if necessary.
7. Press MODE to exit.

Modify setpoints during a dive

The high and low setpoints or a custom (manual) set point can be adjusted during a dive.

To modify setpoints during a dive:

1. While in CCR mode, keep UP pressed.
2. Scroll to the setpoint you want to adjust with UP or DOWN.
3. Press SELECT to enter the setting.
4. Press DOWN or UP to adjust value.
5. Press SELECT to save.
6. Press MODE to exit.

Changing gases

In CCR dive mode, Suunto DX allows both setpoint and gas changes to enabled gas mixes during the dive.

To adjust the diluent during a dive:

1. Keep UP pressed.
2. Scroll through the settings with UP or DOWN to access the CC Diluent setting and press SELECT.
3. Scroll through the diluent list with UP or DOWN and press SELECT to select a Diluent.

Enabled open-circuit gas changes are made in the same way and at the same time as the closed-circuit (CC) dive changes to an open-circuit (OC) dive. This feature is useful in bail-out situations.

Hyperoxic and hypoxic mixes

Suunto DX displays the text HYPER if the diluent gas PO₂ at the current depth is over 1.6. The text HYPOX is displayed if the diluent gas PO₂ at the current depth is less than 0.18.

Gauge mode

With Gauge mode, you can use Suunto DX as a bottom timer.

The timer in the center of the display shows dive time in minutes and seconds and activates at the start of the dive. The total running dive time, in minutes, is in the lower right corner.

The timer in the center of the display can be used as a stopwatch by pressing SELECT during the dive.

Pressing SELECT resets the main timer and adds a bookmark to the dive log. The previously-timed interval is displayed below the main timer.

Gauge mode has the following settings

• Depth alarm (see Depth alarm)
• Dive time alarm (see Dive time alarm)
• Sample rate (see Sample rate)

Gauge mode is a bottom timer only and thus includes no decompression information or calculations.

Dive planning mode

The dive planning mode PLAN NoDeco can be used to plan a dive that does not require decompression. You enter the depth of your upcoming dive, and Suunto DX calculates the maximum time you can stay at that depth without requiring decompression stops.

The dive plan takes into account:

• any calculated residual nitrogen
• dive history from the past four days

To plan dives:

1. Press MODE until you see PLAN NoDec.
2. The display briefly shows your remaining desaturation time before continuing to the planning display.
3. Press DOWN or UP to scroll your upcoming dive depths. The depth moves in 3 m (10 ft) increments from 9 m – 45 m (30 ft – 150 ft). The no-decompression time limit for the selected depth is shown in the center of the display. If you have dived at least once with Suunto DX, the SURFTIME + field appears. You can adjust the surface time with UP.
4. Between consecutive dives, you can press SELECT to adjust surface time.
5. Press MODE to exit.

Dive time alarm

The dive time alarm can be activated and used for several purposes to add to your diving safety. It is simply a countdown timer in minutes.

To set the dive time alarm:

1. While in a relevant dive mode, keep DOWN pressed.
2. Press DOWN or UP to scroll to Alarm Time.
3. Press UP to toggle the alarm on and press SELECT to confirm.
4. Adjust the duration with UP or DOWN and accept with SELECT.
5. Press MODE to exit.

Error state (algorithm lock)

Suunto DX has warning indicators that alert you to react to certain situations that would significantly increase the risk of DCI. If you do not respond to these warnings, Suunto DX enters an error state and shows Er on the display. This indicates that the risk of DCI has greatly increased.

If you omit decompression stops for longer than three (3) minutes, the RGBM algorithm is locked for 48 hours. When the algorithm is locked, no algorithm information is available and Er is shown instead. Locking the algorithm is a safety feature, highlighting that the algorithm information is no longer valid.

In such a condition, you should descend back below the ceiling level to continue the decompression. If you fail to do so within three (3) minutes, Suunto DX locks the algorithm calculation and displays Er instead, as shown below. Note that the ceiling value is no longer present.

In this state, you significantly increase your risk of decompression sickness (DCS). Decompression information is not available for the next 48 hours after surfacing.

It is possible to dive with the device when the algorithm is locked, but instead of the decompression information, Er is shown.

If you dive again in this error state, the algorithm lock time resets to 48 hours when you surface.

Oxygen calculations

During a dive, Suunto DX calculates partial pressure of oxygen (PO₂), central nervous system toxicity (CNS%) and pulmonary oxygen toxicity, tracked by OTU (oxygen toxicity units).

The oxygen calculations are based on currently accepted exposure time limit tables and principles.

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

Oxygen related information displayed by the dive computer is also designed to ensure that all warnings and displays occur at the appropriate phases of a dive. For example, the following information will be shown before and during a dive when the computer is set in Mixed mode:

• The selected O₂% on the alternative display
• OLF% alternative display for either CNS% or OTU% (whichever is larger)
• Audible alarms are given and the OLF value starts to blink when the 80% and 100% limits are exceeded.
• Audible alarms are given and the actual PO₂ value blinks when it exceeds the preset limit.
• In dive planning, the maximum depth according to the O₂% and maximum PO₂ selected

Personal and altitude adjustments

There are several factors that can affect your susceptibility to DCS. Such factors vary between divers and from one day to another.

The personal factors which tend to increase the possibility of DCS include:

• exposure to cold water - less than 20°C (68 °F)
• below average physical fitness level
• fatigue
• dehydration
• stress
• obesity
• patent foramen ovale (PFO)
• exercise before or after dive

The five-step personal setting can be used to adjust the algorithm to fit your DCS susceptibility.

In addition to the personal setting, Suunto DX can be adjusted for diving at different altitudes. This adjusts the decompression calculation according to the selected altitude adjustment.

To change the personal and altitude adjustment settings:

1. While in a dive mode, keep DOWN pressed.
2. Press SELECT to enter Personal Altitude settings.
3. Press UP to change the Personal adjustment and confirm with SELECT.
4. Press UP to change the Altitude adjustment and confirm with SELECT.
5. Press MODE to exit.

Rebreather diving

Suunto DX has one mode dedicated to rebreather diving, CCR mode. This mode uses fixed high/low setpoint values which you can modify in the watch or through DM5.

Fixed setpoint calculation enables Suunto DX to be used as a backup dive computer on rebreather dives. It does not control or monitor the rebreather unit in any way.

When you select CCR mode (see CCR mode), the gas settings split into two: CC gases (closed-circuit gases) and OC gases (open-circuit gases).

Sample rate

The sample rate controls how often information from the dive is saved to the active log. The sample rate options are: 10, 20, 30 and 60 seconds. The default sample rate is 20 seconds.

To change the sample rate:

1. While in a dive mode, keep DOWN pressed.
2. Press UP to scroll to Sample Rate and press SELECT.
3. Press DOWN or UP to change the rate and confirm with SELECT.
4. Press MODE to exit.

Safety stops and deepstops

Safety stops are widely considered good diving practice and are a critical 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.

Suunto DX displays two different types of safety stops: recommended and mandatory.

With every dive over 10 meters (30 feet), there is a three-minute countdown for the recommended safety stop. This stop is taken in the 3-6 m (10-20 ft) range. Suunto DX shows a STOP icon and a three-minute countdown.

When the ascent rate exceeds 10 m (33 ft) per minute for more than five consecutive seconds, the microbubble build-up may be more than is allowed for in the decompression model.

In this situation, Suunto DX adds a mandatory safety stop to the dive. The time of this stop depends on the speed violation of the ascent rate.

The STOP icon is shown in the display. When you reach the depth zone between 6 m and 3 m (18 ft and 9 ft) the following is displayed:

1. CEILING and STOP
2. Ceiling depth
3. Safety stop time

Wait at the ceiling until the mandatory safety stop warning disappears.

Deepstops activate when you dive deeper than 20 m (65.6 ft).

If the dive timer is on the screen when deepstop activates, the timer is replaced with deepstop.

After deepstop is over, the user can change between deepstop and the timer by long pressing the MODE button.

Deepstops are presented the same way as safety stops. Suunto DX notifies you that you are in the deepstop area by displaying:

• CEILING in the top
• DEEPSTOP in the center row
• Stop depth
• Countdown timer

Deepstop is on by default in Air and Nitrox modes. To turn deepstop off:

1. While in a dive mode, keep DOWN pressed.
2. Press DOWN to scroll to Deepstop and enter with Select.
3. Press UP to toggle on/off.
4. Press MODE to exit.

Software version

You can check the software version and battery status of Suunto DX under the general settings.

1. While in time mode, keep DOWN pressed.
2. Press UP to scroll to Version and press SELECT.
3. The software version is displayed along with the battery voltage.

Stopwatch

The stopwatch can be used to measure elapsed and split times.

To activate the stopwatch:

1. While in time mode, scroll through the bottom row view by pressing UP or DOWN until the stopwatch is displayed.

2. Press SELECT to start/stop the stopwatch.
3. Press DOWN to take split times.
4. Keep SELECT pressed to reset the stopwatch.

After stopping the stopwatch, you can scroll through the split times with DOWN.

You can also use the stopwatch while diving for various timing purposes. To activate the stopwatch in dive mode, keep MODE pressed.

Start and stop the stopwatch by pressing SELECT.

Surface and no-fly time

Once back at the surface, Suunto DX continues to provide post-dive safety information and alarms. If, after your dive, you need to wait until flying, the no-fly symbol displays in all modes.

To access further information about your surface and no-fly times, enter dive mode.

Suunto DX shows the time since you surfaced in the Surf t. field. The airplane symbol indicates that you should not fly. The countdown until you will be safe to fly is shown in the No Fly field.

No-fly time is always at least 12 hours and equals desaturation time when it is more than 12 hours. For desaturation times shorter than 70 minutes, the no-fly time is not displayed.

If decompression is omitted during a dive so that Suunto DX enters error state (see Error state (algorithm lock)), the no-fly time is always 48 hours.

If a dive is done in Gauge mode (bottom timer), the no-fly time is 48 hours.

The Divers Alert Network (DAN) recommends the following on no-fly times:

• 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. Further, the Undersea and Hyperbaric Medical Society (UHMS) suggests divers using standard air cylinders and exhibiting no symptoms of decompression sickness wait 24 hours after their last dive to fly in an aircraft with cabin pressure up to 2,400 m (8,000 ft). The only two exceptions to this recommendation are:
  • If a diver has less than two (2) hours total accumulated dive time in the last 48 hours, a 12 hour surface interval before flying is recommended.
  • Following any dive that required a decompression stop, flying should be delayed for at least 24 hours, and if possible, for 48 hours.

Suunto recommends that flying is avoided until all the DAN and UHMS guidelines, as well as the dive computer’s no-fly conditions, are satisfied.

Dive numbering

If the Suunto DX has not counted the no-fly time down to zero, then repetitive dives belong to the same dive series.

Within each series, the dives are given numbers. The first dive of the series is DIVE 1, the second DIVE 2, and so on.

If you start a new dive with less than five (5) minutes at the surface, Suunto DX treats the new dive as part of the previous dive. The dive time continues where it left off.

After five (5) minutes or more at the surface, any new dives are part of a repetitive dive series. The dive counter displayed in the planning mode adds one to each new dive in the repetitive series.

The planning mode allows you to review the no-decompression limits on the next dive in a series.

Suunto Fused RGBM

Suunto's decompression model development originates from the 1980s when Suunto implemented Bühlmann's model based on M-values in Suunto SME. Since then research and development has been ongoing with the help of both external and internal experts.

In the late 1990s, Suunto implemented Dr. Bruce Wienke's RGBM (Reduced Gradient Bubble Model) bubble model to work with the earlier M-value based model. The first commercial products with the feature were the iconic Suunto Vyper and Suunto Stinger. With these products the improvement of diver safety was significant as they addressed a number of diving circumstances outside the range of dissolved-gas-only models by:

• Monitoring continuous multiday diving
• Computing closely spaced repetitive diving
• Reacting to a dive deeper than the previous dive
• Adapting to rapid ascents which produce high microbubble (silent-bubble) build-up
• Incorporating consistency with real physical laws for gas kinetics

In Suunto Fused™ RGBM the tissue half-times are derived from Wienke’s FullRGBM where human body is modeled by fifteen different tissue groups. FullRGBM can utilize these additional tissues and model the on-gassing and off-gassing more accurately. The amounts of nitrogen and helium on-gassing and off-gassing in the tissues are calculated independently from each other.

The advantage of Suunto Fused RGBM is additional safety through its ability to adapt to a wide variety of situations. For recreational divers it may offer slightly longer no- deco times, depending on the chosen personal setting. For open-circuit technical divers it allows use of gas mixes with helium - on deeper and longer dives helium based gas mixes provide shorter ascent times. And finally, for rebreather divers the Suunto Fused RGBM algorithm gives the perfect tool to be used as a non-monitoring, set point dive computer.

Diver Safety

Because any decompression model is purely theoretical and does not monitor the actual body of a diver, no decompression model can guarantee the absence of DCS. Experimentally it has been shown that the body adapts to decompression to some degree when diving is constant and frequent. Personal adjustment settings are available for divers who dive constantly and are ready to accept greater personal risk.

Altitude diving

The atmospheric pressure is lower at high altitudes than at sea level. After traveling to a higher altitude, you will have additional nitrogen in your body, compared to the equilibrium situation at the original altitude. This 'additional' nitrogen is released gradually over time and equilibrium is restored. It is recommended that you acclimatize to a new altitude by waiting at least three hours before making a dive.

Before high-altitude diving, you need to adjust the altitude settings of your dive computer so that the calculations take into account the high altitude. The maximum partial pressures of nitrogen allowed by the mathematical model of the dive computer are reduced according to the lower ambient pressure.

As a result, the allowed no decompression stop limits are considerably reduced.

Oxygen exposure

The oxygen exposure calculations are based on currently accepted exposure time limit tables and principles.

The dive computer calculates separately the Central Nervous System oxygen toxicity (CNS) and the Pulmonary Oxygen toxicity, the latter measured by the addition of Oxygen Toxicity Units (OTU).

Both fractions are scaled so that the diver’s maximum tolerated exposure for each is 100%.

Suunto DX does not display CNS% or OTU% but instead displays the larger of the two in the OLF% field. OLF% value is the Oxygen limit fraction or Oxygen Toxicity Exposure.

For example, if the diver’s maximum tolerated exposure for CNS% is 85% and the maximum tolerated exposure for OTU% is 80% the OLF% displays the largest scaled value, here 85%.

Oxygen related information displayed by the dive computer is also designed to ensure that all warnings and displays occur at the appropriate phases of a dive.

Tank pressure

When using the optional Suunto Wireless Transmitter, the pressure of your tank is shown in the lower left of the display.

Whenever you start a dive, the remaining air time calculation begins. After 30-60 seconds, the first estimation of remaining air time is shown in the left center of the display.

The calculation is always based on the actual pressure drop in your tank and automatically adapts to your tank size and current air consumption.

The change in your air consumption is based on constant one second interval pressure measurements over periods of 30–60 seconds. An increase in air consumption decreases the remaining air time rapidly, while a drop in air consumption increases the air time slowly. In this way, an overly optimistic air time estimate, caused by a temporary drop in air consumption, is avoided.

The remaining air time calculation includes a 35 bar (500 psi) safety reserve. This means that when the instrument shows the air time to be zero, there is still a small reserve.

The remaining air time is not displayed when either deepstops or the decompression ceiling has been activated. You can check remaining air time by keeping DOWN pressed.

Temperature changes affect the tank pressure and consequently the air time calculation.

Low air pressure warnings

The dive computer warns you with two (2) audible double beeps and a blinking pressure display when the tank pressure reaches 50 bar (700 psi).

Two (2) double beeps sound when the tank pressure reaches the defined alarm pressure and when the remaining time reaches zero.

Wireless transmission

To enable wireless transmission of tank pressure data to Suunto DX requires:

1. Installation of Suunto Wireless Transmitter onto your regulator.
2. Pairing the transmitter to your Suunto DX.
3. Enabling the wireless integration in your Suunto DX settings.

The transmitter enters power saving mode with slower data transmission rate if the tank pressure remains unchanged for more than five (5) minutes.

The optional transmitter sends out a low battery (batt) warning when its battery voltage is getting low. This is shown intermittently instead of the pressure reading. When you get this warning, the tank pressure transmitter's battery needs to be replaced.

Installing and pairing transmitter

When purchasing the Suunto Wireless Transmitter, we strongly recommend that you have your Suunto representative attach the transmitter to the first stage of your regulator.

The unit needs to be undergo a pressure test after installation and typically this requires a trained technician.

In order to receive wireless data, the transmitter and the Suunto DX need to be paired.

The wireless transmitter activates when the tank pressure exceeds 15 bar (300 psi). The transmitter then starts sending pressure data together with a code number.

When your Suunto DX is within 0.3 m (1 ft) of the transmitter, it receives and stores that code. The transmitter and Suunto DX are now paired. Suunto DX will then display the pressure data it receives with this code. This coding procedure prevents data mix-up from other divers also using a Suunto Wireless Transmitter.

To assign a new transmitter code:

1. Slowly open the tank valve fully to pressurize the system.
2. Immediately close the tank valve.
3. Quickly depressurize the regulator so that the pressure is reduced to less than 10 bar (145 psi).
4. Wait about 10 seconds, and slowly open the tank valve again to re-pressurize above 15 bar (300 psi).

The transmitter assigns a new code automatically. To re-pair the transmitter with your Suunto DX:

1. While in a dive mode other than Free or Gauge, keep DOWN pressed to enter the settings.
2. Press DOWN to scroll to Tank Press Pairing and press SELECT.
3. Make sure Tank Press Pairing is set to On and press SELECT.
4. A code number is displayed. Press UP to clear the code.
5. Press SELECT.
6. Press MODE to exit.

With the system pressurized to above 15 bar (300 psi), bring your Suunto DX close to the transmitter. When pairing is completed, the dive computer displays the new code number and the transmitted tank pressure.

The wireless transmitter indicator is displayed every time a valid signal is received.

Transmitted data

After pairing, your Suunto DX receives tank pressure data from the transmitter.

Any time the Suunto DX receives a signal, one of the following symbols is shown in the lower left corner of the display.

Tank pressure alarm

There are two tank pressure alarms. The first is fixed at 50 bar (700 psi) and cannot be changed.

The second is user configurable. It can be turned on or off and can be used for a pressure range of 10–200 bar (200-3000 psi).

To set the tank pressure alarm value:

1. While in a dive mode, keep DOWN pressed to enter settings.
2. Press DOWN to scroll to Tank Press Alarm and press SELECT.
3. Press UP to turn the alarm on and confirm with SELECT.
4. Adjust the pressure level with UP or DOWN and confirm with SELECT.
5. Press MODE to exit.

Air time

Air time can only be displayed when a wireless tank pressure transmitter is installed and in use.

To activate air time:

1. While in a dive mode, keep DOWN pressed.
2. Press DOWN to scroll to Air Time.
3. Press UP to turn on the air time reading.
4. Press SELECT.
5. Press MODE to exit.

Tones

Device tones can be turned on or off. When tones are off, there are no audible alarms.

To set tones:

1. While in time mode, keep DOWN pressed.
2. Press DOWN or UP to scroll to Tones and press SELECT.
3. Press DOWN or UP to toggle on/off and confirm with SELECT.
4. Press MODE to exit.

Water contact

The water contact is located on the side of the case. When submerged, the water contact poles are connected by the conductivity of the water. Suunto DX switches to dive state when water is detected and the depth gauge senses water pressure at 1.2 m (4 ft).

The AC is shown until the water contact deactivates. It is important to keep the water contact area clean. Contamination or dirt can prevent automatic activation/deactivation.

Handling guidelines

Handle Suunto DX with care. The sensitive internal electronic components may be damaged if the device is dropped or otherwise mishandled.

When travelling with this dive computer, ensure that it is packed securely in check-in or carry-on luggage. It should be placed in a bag or other container where it cannot move around bumped or easily hit.

Do not try to open or repair Suunto DX by yourself. If you are experiencing problems with the device, please contact your nearest authorized Suunto Service Center.

Wash and dry the dive computer after use. Rinse very carefully after any salt-water dive.

Pay special attention to the pressure sensor area, water contacts, pushers, and USB cable port. If you use the USB cable before washing the dive computer, the cable (device end) should be rinsed as well.

After use, rinse it with fresh water, mild soap, and carefully clean the housing with a moist soft cloth or chamois.

Use only original Suunto accessories - damage caused by non-original accessories is not covered by warranty.

Water resistance

Suunto DX is water resistant to 200 meters (656 ft) in compliance with the dive watch standard ISO 6425.

To maintain water resistance, it is recommended to:

• never use the device for other than intended use.
• contact an authorized Suunto service center, distributor or retailer for any repairs.
• keep the device clean from dirt and sand.
• never attempt to open the case yourself.
• avoid subjecting the device to rapid air and water temperature changes.
• always clean your device with fresh water if subjected to salt water.
• never knock or drop the device.

Battery replacement

Suunto DX displays a battery symbol as a warning when the power gets too low. When this happens, your Suunto DX should not be used for diving until the battery has been replaced.

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.

Defects caused by improper battery installation are not covered by the warranty.

All history and logbook data, as well as the altitude, personal and alarm settings, remain in the dive computer memory after the battery change. Other settings revert back to default values.

Technical specifications

Dimensions and weight

• Length: 49 mm (1.94 in)
• Width: 49 mm (1.94 in)
• Height: 17 mm (0.68 in)
• Weight: 107 g (3.77 oz) (with elastomer bracelet), 182 g (42 oz) (with titanium bracelet)

Operating Instructions

• Water resistance: 200 m (656 ft) (complying with ISO 6425)
• Normal altitude range: 0 to 3,000 m (0 to 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)
• Maintenance cycle: 200 dives or two years, whichever comes first

Depth gauge

• Temperature compensated pressure sensor
• Accurate to 150 m (482 ft) complying with EN 13319
• Depth display range: 0 to 300 m (0 to 984 ft)
• Resolution: 0.1 m from 0 to 100 m (1 ft from 0 to 328 ft)

Temperature display

• Resolution: 1 °
• Display range: -20 °C to +50 °C (-4 °F to +122 °F)
• Accuracy: ± 2 °C (± 3.6 °F) within 20 minutes of temperature change

Mixed mode

• Helium: 0–95%
• Oxygen: 5–99%
• Partial pressure of oxygen (pO2): 0.2 – 3.0
• Oxygen Limit Fraction: 0–200% with 1% resolution
• Gas mixtures: up to 8

CCR mode

• Helium %: 0–95
• Oxygen %: 5–99
• Partial pressure of oxygen (pO2): 0.2 – 3.0
• Oxygen Limit Fraction: 0–200% with 1% resolution
• CC gases: up to 3
• OC gases: up to 8

Other displays

• Dive time: 0 to 999 min
• Surface time: 0 to 99 h 59 min
• Dive counter: 0 to 999 for repetitive dives
• No-decompression time: 0 to 99 min (– after 99)
• Ascent time: 0 to 999 min (– after 999)
• Ceiling depths: 3.0 to 150 m (10 to 492 ft)

Calendar clock

• Accuracy: ± 25 s/month (at 20°C/68°F)
• 12/24 h display

Compass

• Accuracy: +/- 15°
• Resolution: 1°
• Max. tilt: 45 degrees
• Balance: global

Timer

• Accuracy: 1 second
• Display range: 0’00 – 99’59
• Resolution: 1 second

Logbook

• Sample rate in air and mixed modes: default 20 seconds
• Memory capacity: approximately 60 hours with 20-second recording interval and without transmitter data. With transmitter data, the capacity is approximately 40 hours. In free dive mode (2-second recording interval), maximum capacity is 3 hours.

Tissue calculation model

• Suunto Fused RGBM
• Maximum depth of operation: 150 m (492 ft)

Radio transceiver

• Frequency band: single channel 5.3 kHz
• Maximum output power: 110 mW
• Range: 1.5 m / 4.9 ft

Manufacturer

Suunto Oy

Tammiston kauppatie 7 A

FI-01510 Vantaa FINLAND

Compliance

CE

Hereby, Suunto Oy, declares that the radio equipment type DW172 is in compliance with Directive 2014/53/EU. The full text of the EU declaration of conformity is available at the following internet address: www.suunto.com/EUconformity.

EU depth gauge standard

EN13319 is a European diving depth gauge standard. Suunto dive computers are designed to comply with this standard.

EU Personal Protective Equipment

The combination of Suunto DX and Suunto Wireless Tank Pressure Transmitter is a personal protective equipment under the directive 89/686/EEC. The notified body no. 0078, Institut National de la Plongée Professionnelle, Entrée 3 - Port de la Pointe Rouge, 13008 MARSEILLE, France, has completed the EC type-examination to the combination mentioned above and assured the conformity with the European standard EN250:2014. The certification is up to the depth of 50m as defined in the EN250:2014.

Trademark

Suunto DX, its logos, and other Suunto brand trademarks and made names are registered or unregistered trademarks of Suunto Oy. All rights are reserved.

Patent notice

This product is protected by pending patent applications and their corresponding national rights: US 5,845,235, US 7,349,805, US 8,660,626, US 13/803,795, US 13/832,081. Additional patent applications may be filed.

International 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 International Limited Warranty. This International Limited Warranty is valid and enforceable regardless of the country of purchase. The International Limited Warranty does not affect your legal rights, granted under mandatory national law applicable to the sale of consumer goods.

Warranty Period

The International Limited Warranty Period starts at the date of original retail purchase.

The Warranty Period is two (2) years for Products and Dive wireless transmitters unless otherwise specified.

The Warranty Period is one (1) year for accessories including but not limited to wireless sensors and transmitters, chargers, cables, rechargeable batteries, straps, bracelets and hoses.

For all Suunto Spartan watches purchased in 2016 the Warranty Period has been extended to three (3) years.

The Warranty Period is five (5) years for failures attributable to the depth measurement (pressure) sensor on Suunto Dive Computers.

Exclusions and Limitations

This International Limited Warranty does not cover:

1. 1. normal wear and tear such as scratches, abrasions, or alteration of the color and/or material of non-metallic straps, b) defects caused by rough handling, or c) defects or damage resulting from use contrary to intended or recommended use, improper care, negligence, and accidents such as dropping or crushing;
2. printed materials and packaging;
3. defects or alleged defects caused by use with any product, accessory, software and/or service not manufactured or supplied by Suunto;
4. non-rechargeable batteries.

Suunto does not warrant that the operation of the Product or accessory will be uninterrupted or error free, or that the Product or accessory will work with any hardware or software provided by a third party.

This International Limited Warranty is not enforceable if the Product or accessory:

1. has been opened beyond intended use;
2. has been repaired using unauthorized spare parts; modified or repaired by unauthorized Service Center;
3. serial number has been removed, altered or made illegible in any way, as determined at the sole discretion of Suunto; or
4. has been exposed to chemicals including but not limited to sunscreen and mosquito repellents.

Access to Suunto warranty service

You must provide proof of purchase to access Suunto warranty service. You must also register your product online at www.suunto.com/register to receive international warranty services globally. For instructions how to obtain warranty service, visit www.suunto.com/warranty, contact your local authorized Suunto retailer, or call Suunto Contact Center.

Limitation of Liability

To the maximum extent permitted by applicable mandatory laws, this International Limited Warranty is your sole and exclusive remedy and is in lieu of all other warranties, expressed or implied. Suunto shall not be liable for special, incidental, punitive or consequential damages, including but not limited to loss of anticipated benefits, loss of data, loss of use, cost of capital, cost of any substitute equipment or facilities, claims of third parties, damage to property resulting from the purchase or use of the item or arising from breach of the warranty, breach of contract, negligence, strict tort, or any legal or equitable theory, even if Suunto knew of the likelihood of such damages. Suunto shall not be liable for delay in rendering warranty service.

Copyright

© Suunto Oy 10/2012. All rights reserved. Suunto, Suunto product names, their logos and other Suunto brand trademarks and names are registered or unregistered trademarks of Suunto Oy. This document and its contents are proprietary to Suunto Oy and are intended solely for the use of clients to obtain knowledge and information regarding the operation of Suunto products. Its contents shall not be used or distributed for any other purpose and/or otherwise communicated, disclosed or reproduced without the prior written consent of Suunto Oy. While we have taken great care to ensure that information contained in this documentation is both comprehensive and accurate, no warranty of accuracy is expressed or implied. This document content is subject to change at any time without notice. The latest version of this documentation can be downloaded at www.suunto.com.

Terms