Contents

Section 04: Setup
04.1 Editor use
04.2 Decompression
04.2.1 Gradient factor
04.2.2 Safety stop |On|
04.2.3 Ascent gas |Optimal|
04.2.4 Deco stops
04.2.5 Deep stops
04.2.6 Ascent rate
04.2.7 Descent rate
04.3 Mixtures
04.3.1 Mixture setup
04.3.2 Def. OC mix
04.3.3 End pressure 50 bar
04.3.4 SAC ǀ25 l/minǀ
04.3.5 Gas switch 2 min
04.3.6 Min pO₂ |0.18 ba|
04.3.7 Max pO₂ |1.60 bar|
04.4 Alarms
04.4.1 Alarm sources
04.4.2 Notifications
04.5 Rebreather
04.5.1 Const pO₂
04.5.2 aSCR
04.5.3 pSCR
04.5.4 Common settings
04.6 Freediving Setup
04.7 Preferences
04.7.1 Display
04.7.2 Timeouts
04.7.3 User interface
04.7.4.Metric
04.7.5 Salinity |Fresh|
04.7.6 Default mode |OC|
04.7.7 Full log Off
04.8 Calibration
04.9 Miscellaneus
04.10 Factory defaults

Section 05: Log book
05.1 Last dive
05.2 Dive list
05.3 Summary

Section 06: Dive planner
06.1 The dive parameters
06.2 Dive plan
06.2.1 Summary
06.2.2 Deco stops

Section 07: Log download
07.1 Log processing in cloud
07.2 Divesoft App
07.3 Off-line log processing

Section 08: System
08.1 System check
08.2 Service functions
08.2.1 Debug
08.2.2 Test
08.2.3 Demo dive
08.2.4 Syslog
08.2.5 Miscellaneous

Section 09: Apps
09.1 Analyzer
09.1.1 Measuring
09.1.2 Calibration
09.2 USB connection
09.3 Emergency torch
09.4 Inclinometr
09.5 Games
09.5.1 Sokoban
09.5.2 Snake

Section 10: Hardware
10.1 Charging
10.1.1 Powering in hyperbaric environment
10.2 Wrist mount
10.3 Control elements
10.4 Physical dimensions
10.5 O₂ sensor cable
10.6 Environmental specifications
10.7 Compliance
10.7.1 CE marking
10.7.2 EN 13319
10.7.3 FCC compliance
10.7.4 Industry Canada (IC) Compliance Notice
10.8 Disposal of waste equipment

Section 04: Setup

The Divesoft Freedom is configured in the surface mode. Activate the surface mode main menu with a short press of both keys and select Setup. Some values can be set during a dive; however, this possibility is reserved for resolving exceptional and emergency situations. The particular set values depend primarily on the user’s experience, physiology and personal preferences. The fact that Divesoft Freedom enables setting a certain value does not mean that this kind of setting is safe and suitable for you and for your planned dive. If you are not sure which value to set, leave the values of the default setting. The manufacturer does not provide a warranty for faulty operation of the Divesoft Freedom if this kind of faulty operation is the result of an improper setup. The factory default setting value is shown in square brackets in the following headlines.

04.1 Editor use

The majority of variable values is edited in a similar manner.

Tilt toward yourself– decrease the entered digit by one or uncheck flag
Tilt to the left – move the cursor to the left
Tilt to the right – move the cursor to the right
Press upper key – discard editing (reset to previous value)
Long press upper key – reset to default value
Press both keys – exit without save
Press lower key – save and exit
Permissible range is indicated by <minimum ..[default] .. maximum> value.
The display shows a brief description below.
Note: Perform the Horizontal calibration (See section 4.8) if there is no valid response to tilting or tapping

An alternative method of input in the editor is the button method. This can be set in Setup -> Preferences -> User interface -> Navigation -> Bttn.

Upper button - moves the cursor over characters
Lower button - sets the value
Long press upper key - moves the cursor back one character
Long press lower key - resets the value to the default and moves the cursor to the beginning.
To save the value you must scroll through all characters to the end, the editor will exit after the last character.

04.2 Decompression

04.2.1 Gradient factor

GF low [0.30]
The gradient factor at the start of decompression (range: 0.00–1.00). GF low determines an additional increase of safety at the depth of the first decompression stop or, as the case may be, at the depth of the decompression ceiling at the start of decompression. Setting the value of 1.00 corresponds to the Bühlmann decompression algorithm without additional increase of safety using the gradient factors method. Setting low values leads to deeper and longer stops at the start of decompression. See also Advised strategies – Gradient factors (See section 3.7.2).

GF high [0.80]
The gradient factor at the end of decompression (range: 0.00–1.00). GF high determines an additional increase of safety when ascending to the surface. Setting the value of 1.00 corresponds to the Bühlmann decompression algorithm without additional increase of safety using the gradient factors method. Setting low values leads to prolongation of shallow decompression stops. For extreme dives a GF high greater than 1 is sometimes used (less safe than the standard Bühlmann decompression algorithm). This requires the special, personally granted license. See also Advised strategies – Gradient factors (See section 3.7.2).

Bailout GF low [0.80]
The gradient factor for bailout at the start of decompression (range: 0.00–1.00). As a general rule, for bailout GF low a higher GF value (a lower additional increase of safety) is set than for standard GF low.

Bailout GF high [0.95]
The gradient factor for bailout at the end of decompression (range: 0.00–1.00). As a general rule, for bailout GF high a higher GF value (a lower additional increase of safety) is set than for standard GF high.

04.2.2 Safety stop (On)

3 minute safety stop within depth 6 to 3 m (20 to 10 ft) is indicated after a dive to a depth greater than 10 m (30 ft).

04.2.3 Ascent gas (Optimal)

Specifies which mixture or set of mixtures will be used for ascent planning. If optimal gas is selected, then the time to surface (TTS) and the dive plan assume the changing of gases from the list of active mixtures. If current gas is selected, then only the gas currently breathed is used for TTS calculation and dive planning. This setting is preferred for dives that do not involve changing gas mixtures.

04.2.4 Deco stops

Stops/Ceil. [Stops]
The Divesoft Freedom can be used in the regimen of separate decompression stops or in the regimen with only the decompression ceiling depth indicated. As a general rule, the stops regimen is more suitable for open water diving and is easy to understand and follow. The ceiling regimen is more suitable for cave and technical diving. The time spent on decompression is slightly shorter if the ceiling regimen is used for continuous decompression. Personal preference is the most important.

Last stop [3 m/10 ft]
The depth of the shallowest decompression stop can be set to 3 m/10 ft or 6 m/20 ft. Choose the depth according to the conditions on the surface and your preference. A deeper last stop extends the decompression time slightly. Use the 6 m/20 ft last stop when using 100% oxygen for decompression.

Rounding [60 s]
You can choose the time on stop rounding (1s; 30s; 60s). 30 or 60s is a good choice for recreational dives. For deep dives, especially with a small value of the GF low and resulting short stops on decompression start, it is better to choose the 1s rounding. Otherwise a prolonged stay on the deco stop due to rounding may lead to the disappearance of the next short deco stop and could negatively affect the decompression profile smoothness.

04.2.5 Deep stops

Pyle Deep stops (Off)
Empiric modification of decompression profile according to Richard Pyle’s algorithm. The combination of Pyle stops and a small value of the GF low can result in a not so optimal decompression profile. Please choose only one preferred method. As a general rule, use GF low 0.30 or less and switch (left switched) Pyle Deep stops Off.

Stops duration (2 min) The value of the Pyle stops duration (range: 1–3 min).

04.2.6 Ascent rate

Rate is used for calculation of the ascent plan and indication of ascent rate, if relative measuring (percentage) is set in Setup → Preferences → User interface → Vertical speed

04.2.7 Descent rate

Rate is used for calculation of the descent plan and indication of descent rate, if relative measuring (percentage) is set in Setup → Preferences → User interface → Vertical speed.

Speed 1 ǀ10 m/min / 33 ft/minǀ
The anticipated ascent rate within small depths, in zone 1 (range: 1–20 m/min). The value is m/min in metric and ft/min in imperial units.

Depth zone 1 ǀ10 m / 3 ftǀ
The depth defining zone 1. This zone lies between the surface and the set depth (range: 0–300 m). The value is m in metric and ft in imperial units.

Speed 2 ǀ10 m/min / 33 ft/minǀ
The anticipated ascent rate within medium depths, in zone 2 (range: 1–20 m/min).

Depth zone 2 ǀ80 m / 262 ftǀ
The depth defining zone 2. This zone lies between depth zone 1 and the set depth (range: 0–300 m).

Speed 3 ǀ18 m/min / 59 ft/minǀ
The anticipated ascent rate within large depths, in zone 3. (range: 1–20 m/min).

Warn under [80 m]
The threshold at which the alarm is activated to indicate exceeding the descent rate. At smaller depths, exceeding the descent rate is ignored. The value is in m metric and ft in imperial units. This alarm is disabled in factory default setting. It can be enabled in Setup → Alarms → Alarm sources → Rates → Descent rate.

Max rate [20 m/min]
The anticipated descent rate (range: 1–40 m/min). The set rate is also used for dive planning. The value is m/min in metric and ft/min in imperial units. Max rate 30 m/min is used to indicate a descent rate at a depth shallower than the warn-under depth.

04.3 Mixtures

04.3.1 Mixture setup

The number of available mixtures depends on the software version.

Each mixture can be set as active (marked checkbox) or inactive (clear box). It can be done in the editing screen or by a shortcut – long press of the upper key in the list of mixtures. Only active mixtures can be selected. The default mixture is always active. In an emergency, a mixture can be marked as active during a dive. Furthermore, a new mixture can be defined during a dive. These features are reserved for emergency situations.

04.3.2 Def. OC mix

A default mixture for an open circuit apparatus. A different default mixture can only be selected from mixtures that are marked as active.

04.3.3 End pressure ǀ50 barǀ

Determines the size of the tank's pressure safety margin. The value is reflected in the planner calculation.

04.3.4 SAC ǀ25 l/minǀ

Surface Air Consumption determines the diver's gas consumption value. The value is used to calculate gas management in the planner.”

04.3.5 Gas switch ǀ2 minǀ

The gas switch duration may be set from 0 to 5 minutes. This time will be added to the dive plan and TTS calculation.

04.3.6 Min pO₂ ǀ0.18 barǀ

The low pO₂ alarm is activated if the current pO₂ is less than the set value (range: 0.18–0.40 bar). The setting of minimum partial pressure of oxygen plays a role in gas switching calculations.

04.3.7 Max pO₂ ǀ1.60 barǀ

The high pO₂ alarm is activated if current pO₂ is bigger than set value (range: 0.8–1.6 bar). The setting of maximum partial pressure of oxygen plays role in gas switching calculations.

04.4 Alarms

There are two kinds of messages, alarms and notifications. Alarm messages appears on red background, notifications on a blue background.

04.4.1 Alarm sources

Deco stop miss [On]
The alarm is activated if the decompression stop is violated (in the stops regimen).

CNS [On]
This alarm occurs when 75 %, 90 % and 100 % of CNS oxygen toxicity limit is reached.

Descent rate [Off]
A descent speed greater than set while deeper than set activates the alarm. See descent rate setting in Setup → Descent rate (See section 4.2.7).

Ascent rate [On]
An ascent speed greater then set for the current deep interval activates the alarm. See ascent rate setting in Setup → Ascent rate (See section 4.2.4).

Low battery [25 %]
The alarm is activated if the remaining battery capacity falls below this limit. Range is 0–40%; 0 means that the alarm is disabled. If set to a value greater than 10 %, then a second alarm on 10 % occurs.

04.4.2 Notifications

No deco end [On]
The end of the dive in zero time (in the terminology of the Bühlmann decompression model), i.e. notification that there will be a decompression obligation.

Deco stop end [On] The end of the decompression stop (in the stops regimen). You can ascend to the next stop or to the surface, as indicated on the display.

Gas switch reminder [Off]
A recommendation to switch to a different mix.

Gas switch done [On]
The change of mixture in OC mode or diluent in CCR mode has been executed. This notification prevents accidental gas mix switch using a shortcut if any key is pressed unintentionally.

Depth & Time
A notification that the set time or depth during a descent or ascent has been reached. Up to three depth alerts can be set during descent, three time alerts, and three depth alerts during ascent. The values are located on an imaginary dive profile in the editor. On the left are the values for descent depths (m, ft), on the "bottom" are the values for time (minutes), on the right are the values for ascent depths.
Lower key - moves the cursor to the next value
Upper key - enter to edit the value.
It is possible to set three separate
depths in the range of 0–300 m, where 0 means deactivation of the notification.
It is possible to set three separate times in the range of 0–999 min., where 0 means deactivation of the notification.

Airbrake
Sets alerts for air breaks during decompression with high oxygen gases.
Break above % - above how much %O₂ we consider the mixture to be oxygen/airbreak
Break after - after how many minutes on oxygen do we want to break
Break length - length of airbreak The times are default 0 - off

04.5 Rebreather

Rebreather settings are available in the Closed Circuit version of the Divesoft Freedom only. There are four types of rebreather supported:

CCR Type

CCR Type - CCR
Constatnt pO₂ CCR - Electronic or manual CCR (eCCR or mCCR), where pO₂ is stable regardless of depth change, set by setpoint.

CCR Type - aSCR
The constant mass flow semi closed rebreather (active SCR).

CCR Type - pSCR
Respiratory minute volume keyed semi closed rebreather (passive SCR).

04.5.1 Const pO₂

Diluents
8 mixtures with any content of oxygen, helium and nitrogen can be set. This setting is independent from the OC mixture setting. The control is the same as with OC mixtures.

Default diluent
A default diluent for a closed circuit rebreather.

SP Low [0.7]
The SP low is set after switching to the fixed setpoint CCR dive mode on the surface.

SP High [1.3]
The SP low can be switched to the SP high manually (via the shortcut or via the menu) or automatically at a set depth during a descent or at a set runtime.

SPhigh auto [0 m/ft]
It is possible to set the automatic switching of the high setpoint during exceeding the depth during descent, time or depth during ascent. The editor shows an imaginary dive profile, where on the left side is the depth during descent, on the "bottom" is the time and on the right the depth during ascent. Lower key - cursor movement Upper key - enter the edit value When the set limits are exceeded to this depth, the high setpoint is automatically set. Zero disables this feature.

SP shortcuts [Off]
Enables or disables the use of button for switching setpoints

SP ascent [High]
Specifies which setpoint will be used to calculate the TTS. Choice between current or high.

04.5.2 aSCR

VO₂ [1.5 l/min]
The metabolic consumption of oxygen (VO₂ ) can be set in the range 0.5–3 l/min.

Constant flow [7.0 l/min]
The constant flow of premix can be set in the range 5–20 l/min.

04.5.3 pSCR

PA ratio [8.0]
The PA ratio can be set in the range 2–16. It is fixed by the design of the SCR.
Ventilatory coef O₂ [20]
The ventilatory coefficient for oxygen is a constant that represents the fact that the harder one works, the faster one breathes (= respiratory minute volume/metabolic consumption of oxygen, VO₂ ). Fit people have a lower respiratory rate for equivalent amounts of work than unfit people, so the lower value represents a physically fit individual (range: 14–28).

04.5.4 Common settings

Stack time [0 min]
Set the scrubber lifetime. The stack time warning will be generated after this time expires. Zero disables this feature.

Number of sensors [0]
Enter the number of O₂ chemical sensors connected to the Freedom using a cable. One, two or three sensors can be connected. The cable equipped with the Molex connectors is included in the Closed Circuit version of the Divesoft Freedom distribution package or can be ordered separately.

Faulty sensors
You can mark any connected but untrusted sensor as disabled. By doing so, you will remove the these sensors from the calculation of the average pO₂

Cell -> 10k
When using the Freedom with external sensors, it is sometimes necessary to adjust the voltage of the sensors, which can be changed by wiring the sensor. This adjustment determines terminator setting. Normally ON. On CCR cables with insulators usually need to be turned off.

3rd sens. ratio
coefficient for 3rd sensor if terminators are disabled, only up to HW rev 3.0 on the latest 3.1 this is no longer the case.

04.6 Freediving Setup

On depth [1.0]
The descent to On depth triggers the start of a dive. Set value greater than Off depth.

Off depth [0.3]
The ascent above Off depth means the end of a dive. Set value smaller than On depth.

04.7 Preferences

04.7.1 Display

Orientation Left hand

Left hand, right hand and the auto orientation can be selected. Auto orientation selects the left or right hand position automatically during the start. It will not switch the display orientation when the diver changes position (i.e. during a head down descent).

Brightness

The display backlight brightness level can be set from 1 to 9. The change of brightness is immediately reflected during a setting, so preferably change this setting in the shade or in the dark. For diving with eyes accommodated to darkness use the lowest brightness setting (level 1). Use high brightness (level 5 to 9) for diving with a high level of ambient light. Also see advised strategies for Diving in darkness (See section 3.7.2).

WARNING: Brightness higher than 7 will significantly reduce battery life per charge. A value of 9 will reduce battery life by up to 50%.

Example: normal battery time with setting 5 is 18h, with brightness set to 9 it is only 9h

Menu highlight
Increase the font of the selected menu line Curr. - only the selected line is highlighted All - whole menu in large font None - all in small font

Screensaver [0 s]
The display will be switched off after the screensaver timeout expires. Zero disables this feature (i.e. display is all the time on).

Screens
Any dive mode screen can be disabled.

OC row4/col3 custom field
The decompression floor or the average depth can be set for the detailed OC screen.

04.7.2 Timeouts

Surface idle [10 min]
The Freedom will be switched off after this timeout expires (range: 1–120 min). Before switching off, “Shutdown?” question is displayed for 30 s. Select No to restart this timer.

Prepared idle [15 min]
The manually activated dive mode will be switched back to surface mode if the dive does not start during this timeout (range: 1–120 min).

Dive termination [10 min]
The dive will be terminated after surfacing and if no subsequent submersion starts during this timeout (range: 0–30 min). Zero disables this feature (i.e. dive will not be terminated automatically).

Dive end Confirm [Off]
If the dive end confirmation is On then a confirmation dialog is displayed for 30 s before the dive ends. Select No to restart the dive termination timer.

Dive time [Auto]
Auto - stop divetime on emergence
Cave - divetime stops after manual end of dive, for cave diving with more dry and wet (siphons/sumps) sections.

04.7.3 User interface

Checklist [Enabled]
If this is not disabled then the setting summary will be shown when the dive mode starts. This is an essential part of a predive check especially for muti-gas and rebreather diving.

Plan order[Time]
The dive ascent plan can be sorted by time or by depth (i.e. in reverse order).

Key delay [0] If a greater value than 0 is set then a longer button press is needed to be recognized as valid user input. Use in case of troubles with unintended activation.

Navigation [Tilt]
The numbers in the editor can be increased or decreased by tilt, by buttons or by tap. To control with tapping it is necessary to practice a little. Do not change the setting to tap unless you have a strong reason.

Gas shortc. [Off]
The default setting for gas shortcuts is off. If enabled then a long press of the upper key selects the previous gas mixture and a long press of the lower key selects the next gas mixture. This list is cyclic.

If the “breathable” option is selected, then mixes with O₂ inside the breathable range with regard to the current depth are switched. The limits of breathable range are set in Setup → Mixtures. If the “all” option is selected, then all mixes are switched, regardless breathability. An alarm will be activated after this kind of switch.

Vert. rate [Unit/min]
If percent is set then the ascent and descent rate are indicated relatively to the ascent and descent speed limits. If unit/min is set then the ascent or descent rate are indicated in depth unit per minute.

Stopw. bttn.
Specifies under which conditions the bottom button functions as a stopwatch control in Gauge mode. You can choose between Disabled, Base scr only, or Always.

Big Depth
Specifies what to display on the bottom line of the Big screen.
Avg - displays average depth
Max - displays maximum depth
Only - displays current depth ONLY, nothing else.

Lower bttn.
Determines the behaviour of the bottom button. The button can be predefined to turn the display off and on for battery saving, or it can be used to reverse the scrolling direction between screens.

04.7.4 Units [Metric]

Imperial or metric units can be selected.

04.7.5 Salinity [Fresh]

Salinity Fresh, Salt or EN 13319 can be set according the water density. If changed to the Sea option then the density of seawater will be used for the depth calculation. The majority of depth gauges is calibrated to fresh water. Do not change this setting unless a direct comparison with a depth gauge calibrated to seawater is needed. EN13319 which is the "universal" density according to the same standard - 1020 kg/m3, which is very close to salt water and quite far from fresh water.
Setting of fresh/sea water doesn’t affect decompression calculations. Decompression is based on ambient pressure and is independent of displayed depth. Only depth of decompression stops is rounded up to usual values according to settings of fresh/sea water and metric/imperial units.

04.7.6 Default mode [OC]

If submersion to a depth greater than 1.5 m occurs with the computer in surface mode or switched off, the computer switches to the selected default mode.

04.7.7 Full log [Off]

04.8 Calibration

Calibration O₂
See O₂ sensors calibration (See section 3.4.2).

Horizontal calibration
Calibration of accelerometers, which are used for control by tilt or tap. Place the computer horizontally (display up) and press any key. It is preferred to use a steady horizontal ground (e.g. a table).

Pressure corr. [0.00 mbar]
Specify pressure sensor correction for more precise measurement of a barometric pressure or altitude. This correction is not needed for general use.

Temperature corr. [0.0 °C/°F]
Specify temperature sensor correction for more precise measurement of temperature. This correction is not needed for general use.

04.9 Miscellaneous

Date and Time
Sets the current time and date
Do not change local time between repetitive dives because the change of local time affects the calculation of desaturation during a surface interval. It is advised to set the local time of a destination prior to leaving for a diving vacation in a different time zone.

Date format
You can choose between common time formats used in different parts of the world.

ISO YYYY-MM-DD 2021-10-18
EU DD.MM.YYYY 18.10.2021
US MM/DD/YYYY 10/18/2021

Set owner
The name of the owner can be set. The first line is displayed when the device is started.

Factory defaults
Reset all setting to default values (except date and time). Computer will be restarted and the horizontal calibration starts automatically after the reset

04.10 Factory defaults

Reset all setting to default values (except date and time). Computer will be restarted and the horizontal calibration starts automatically after the reset

Section 05: Log book

05.1 Last dive

Details from the last dive from list.

Dive profile
The graph is plotted within a white line.

Decompression ceiling
The graph is plotted within a red line; in deco dive only.

Date and time
The time of submersion.

Depth
The maximum depth of the dive.

T
The temperature at its coldest point of the dive (measured during the ascent).

Duration
This indicates time from submersion at the dive start to surfacing at the dive end. It includes all surface stays, if part of the dive. Notice if the decompression obligation was present.

Avg depth
The average depth, calculated from the whole profile.

Mode
Original dive mode (at the dive start).

CNS
The CNS oxygen clock value after surfacing.

Zoomed view - Event list
The following context menu can be called up in the dive detail by pressing both buttons
Zoomed view -zooms the dive profile to detail for detailed viewing. The bottom button can be used to scroll the profile further, the top button to go back along the timeline. To return to the dive detail, press both buttons again and select Full view.
Event list - displays the events in the dive
Back to menu - return one level back

05.2 Dive list

Here all dives from the memory of the Divesoft Freedom are listed. The memory capacity is approximately 100 hours of typical dive profiles. When the memory is full, the oldest records are automatically deleted. Second and subsequent dives in one day are marked with corresponding letters. Demo dives (logs stored after the dive simulation) are marked with light blue characters. Test dives are marked with red characters (e.g. the first dive to approx. 350 m). Use upper button short press to open the screen with the dive details. Use long press to go through the pages.

05.3 Summary

A summary of all dives from the memory of the Divesoft Freedom is shown (test and demo dives excluded).

Section 06: Dive planner

06.1 The dive parameters

All non-listed parameters are taken from the respective setting.

Plan mode
Select the dive mode you are planning for.
OC – Open circuit SCUBA
S/CCR – SCR or CCR SCUBA
CCR+BO – SCR descent & bottom followed by OC bailout
Other than OC plan mode is available in the Closed Circuit version only.

Surface interval
Enter the surface interval from now (in minutes).

Target depth
Enter the bottom depth (in m/ft). For a multilevel dive use an average depth.

Bottom time
Enter the dive runtime when the ascent starts, including descent.

Bottom mix
The gas mixture planned for a descent and the stay on the bottom.

Diluent
Diluent for the SCR/CCR dive (Closed Circuit version only).

Plan dive
The resulting dive plan consists of a summary and a detailed listing of deco stops.

Simulation
Start real-time simulation of the dive. The computer will switch to dive mode and will show all displays in the same way as during a real dive.

Save as default
Save the parameter set as a default for the following plans, otherwise it is forgotten after switch off.

06.2 Dive plan

06.2.1 Summary

Nodeco
The runtime of the planned dive where the decompression obligation starts.

TTS
The time to surface at the ascent start.

Total
The runtime when surfacing.

CNS
The percentage of consumption of CNS toxicity limit.

NoFly
The NoFly time after the planned dive.

06.2.2 Deco stops

The description of the ascent profile and used gas mixtures. If optimal gas is selected in the decompression settings, then the plan considers changing of gases from the list of active mixtures; the gas switch time is included. If the current gas setting is selected in the decompression settings, then only the actual gas is used.

Section 07: Log download

Connect the USB cable included in distribution package to the Freedom connector and then to the USB port of your computer, tablet or mobile phone. Attention, maintaining the connection order is very important. A USB adapter will probably be necessary for mobile devices.
Select the USB connection item in the menu Apps -> USB connection. The Divesoft Freedom memory can be connected as a mass storage device (like a flash drive). The connection to Windows, Mac, Linux, Android and iOS was tested, but there is no guarantee of compatibility with all operating systems and all computers. Access to the internal memory is read only. Logs are stored in the DIVELOG folder; data from one dive is stored as one *.DLF file.

WARNING: It is absolutely crucial to follow the cable connection procedure. The charging/data cable must be plugged into the Freedom first and then into the desktop, laptop or other devices. Failure to follow this procedure may cause irreversible damage to the device.

07.1 Log processing in cloud

Download files from the DIVELOG folder to your hard drive and then upload data to WETNOTES.COM. Here you can store and edit your dives, study graphs, details and much more. If you wish, you can share dives with your buddy or a group. Visit WETNOTES.COM and explore all the possibilities that it offers!

07.2 Divesoft App

Dive logs uploaded to Wetnotes.com can be viewed on mobile devices via the [Divesoft.app ](https://Divesoft.app) Download the version for your mobile phone or tablet.

07.3 Off-line log processing

Offline storage of dive logs is not supported by Divesoft. Third party software such as Subsurface can be used
https://subsurface-divelog.org/

Section 08: System

08.1 System check

There is detailed version, license, settings, battery and pressure sensor information described on 5 screens (6 for CCR version).

08.2 Service functions

Service functions are primarily intended to support a qualified technician or to be performed with the recommendation of the manufacturer’s technical support. These functions are not blocked but no end user support is provided. A detailed description is beyond the scope of this manual. An IT specialist can understand most of them without further description. The service functions menu is accessible via the coded key press (press both keys; release one key and press it again; release both keys).

08.2.1 Debug

All debug information is read only. There is no risk associated with browsing them just for curiosity.

Sensors
A detailed state of all sensors.

Deco model
The state of the decompression model is described in detail on 5 screens (including the compartment saturation graph).

Scheduler The firmware task list with information specifying the system footprint.

Variables The values of some internal variables.

08.2.2 Test

There is no risk associated with performing these tests just for curiosity while on the surface.

Buttons
It runs a simple test of both buttons.

Vibration
It runs a short test of the vibration.

Display
A red, green and blue screen will be displayed for the display test.

Watchdog
Watchdog is a timer that is used to detect and recover from firmware malfunctions. You can intentionally hang the computer with this test. Do not use underwater!

Test dive
The test dive is used by the manufacturer or an authorized service for the pressure sensor calibration and tightness test. It is similar to the gauge mode. The test dive log will be stored, but clearly marked as a test dive. The test dive is not included in the log summary.

08.2.3 Demo dive

The test dives are suitable for those interested in a demonstration of the Divesoft Freedom features. There is no risk associated with the demo dive performing. During a demo dive almost all functions can be tested on the surface. One exception is the pressure sensor reading. Also O₂ sensors connected with a cable can’t be used for the measured CCR dive mode. The depth profile is provided and decompression gas mixtures are automatically switched. The Emergence du Ressel demo dive uses the authentic depth profile from the penetration through the first siphon of this French cave. Demo dive logs can be permanently stored into the log memory. The oldest dive logs will be replaced by the new demo dive log if the memory is full. Demo dive logs are clearly marked. A demo dive log, if this is the last dive, can be erased later using Demo dive → Erase demo log. The single bottom-level demo dive functionality is equivalent to the dive simulation in the dive planner. See also Dive planner (See section 6.1).

08.2.4 Syslog

The system events log list. All information is read only.

08.2.5 Miscellaneous

Warning: These functions can alter values of internal variables or/and the state of the Divesoft Freedom. Use them with caution and only if you understand the consequences.

Force Dive Start
It can be used for an extraordinary shallow dive in a place where initial submersion to a depth greater than 1.5 m is impossible. This also can be used if the automatic dive start failed for any reason (e.g. submersion recognition algorithm is confused by previous pressure changes unrelated to diving).

Force Dive End
If the surface pressure (zero depth) was incorrectly detected and the computer “dives” while on the surface then the dive can be forced to stop with this function.

Browse config
Every setting can be read and changed. The majority of settings can also be changed using an ordinary setup; the equivalent minimum and maximum limits for every setting will be applied. There are only few internal configuration parameters intended for special use.

Reset deco data
The residual inert gas saturation from previous dive(s) will be removed. Only use this function to give the computer to another diver whose surface interval is sufficient for a complete desaturation.

Bootloader
FIRMWARE UPDATE

Restart to the bootloader mode for the firmware update or the version upgrade. Connect the USB cable included in distribution package to the USB port of your computer where the Divesoft.Center software is properly installed. Click on the link for further information and for the firmware download. The version license is fixed to the unit’s serial number and non-transferable to the other Divesoft Freedom computers.

Section 09: Apps

09.1 Analyzer

Warning: O₂ sensor has to be calibrated before use!
Warning: do not use expired or malfunctioning sensors!

The Divesoft Freedom computer can be used as a nitrox analyzer if an oxygen sensor is attached. The O₂ sensor housing can be ordered separately. O₂ sensors previously used in rebreather can be used, if they are still able to measure full range of oxygen pressures in atmospheric pressure safely.

09.1.1 Measuring

Connect housing with O₂ sensor, start the Analyzer application and use as any other nitrox analyzer. Use only barely audible stream of nitrox from SCUBA tank valve and be sure to press housing inlet tightly.

09.1.2 Calibration

Analyzer can be calibrated with air. Press lower key to start calibration. Confirm calibration with upper key press when mV reading is stable. Old sensor may but may not be detected by low voltage during calibration using air (see the sensor manufacturer’s datasheet). Reliable method is to calibrate the sensor with air and then check the maximum range with pure oxygen. Recalibrate analyzer sensor at least 24 h before measuring. Calibration process takes altitude (atmospheric pressure) and temperature into account. Rebreather sensor calibration has no connection with analyzer sensor calibration.

9.2 USB connection

Switches the computer into USB link mode for downloading dives, uploading a new license, or updating firmware. Freedom will report as a Mass storage device when connected by cable to a personal computer.

09.3 Emergency torch

brightens the entire display to the maximum and emits the maximum amount of light possible. Can be used as an emergency torch in certain conditions when all other torches have failed.

09.4 Inclinometr

An inclinometer is a tool for measuring the steepness of a slope. It can be used in mapping caves and wrecks. For correct and accurate operation, the computer must be well calibrated with horizontal calibration.

Games

Do not disable error messages and notifications related to decompression if the games are played during a deco stop. Ensure to not accidentally reposition while playing during a dive. Check the pressure gauges on a regular basis. Playing a game will reduce your attention. Remember: you want to decompress safely, not just achieve a higher level in the game! The games were tested on children. Nobody was hurt.

09.5 Games

09.5.1 Sokoban

Sokoban is a type of transport puzzle, in which the player (a diving mask with snorkel) pushes tanks or crates around in a warehouse, trying to get them to storage locations (red dots). The game is played on a board of squares, where each square is either a floor or a wall. Some floor squares contain tanks, and some floor squares are marked as storage locations. The player is confined to the board, and may move horizontally or vertically onto empty squares (never through walls or boxes). The player can also move into a tank, which pushes it into the square beyond. Tanks may not be pushed into other tanks or walls, and they cannot be pulled. The puzzle is solved when all tanks are in the storage locations.

09.5.2 Snake

Snake is a game where the player maneuvers a line which grows in length, with the line itself being a primary obstacle. The player controls the head of the snake. As it moves forward, it leaves a trail behind, resembling a moving snake. The snake has a specific length. The player loses when the snake runs into the screen border, a trail or another obstacle, or eats poison (skull), or starves to death. The snake lose its length slowly (every 30 steps), and when it is too short, it dies from starvation. The player attempts to eat fish by running into them with the head of the snake. Each fish eaten makes the snake longer, so maneuvering becomes progressively more difficult.

Section 10: Hardware

10.1 Charging

Use the included USB charging cable with Freedom connector to charge your Freedom computer. First connect the cable to your Freedom computer and subsequently connect the cable to a suitable power adapter (5V, 1A). Make sure the adapter is approved and certified for the area where you will be charging the Freedom and is suitable for use with the local power grid. The Freedom’s connector is situated between the buttons. If the connector is protected by the lid, then unscrew the connector lid before attaching the cable. The computer may or may not be switched on during charging. If the computer is switched on, then the icon in the top-right corner on the surface screen indicates the state of charge.

WARNING: It is absolutely crucial to follow the cable connection procedure. The charging/data cable must first be plugged into the Freedom and then into the adapter and power outlet. Failure to follow this procedure may cause irreversible damage to the device.

It takes about 5 hours to charge from near empty state to fully charged. Maximum charging current is less than 500 mA, so there is no difference between charging using the charger or charging from an ordinary computer USB port. Charge the battery at least once every six months.

10.1.1 Powering in hyperbaric environment

The Divesoft Freedom cannot be powered externally and recharged during a dive (e.g. in hyperbaric chamber, in diving bell or mounted on ROV) without a special setting which is available only on request. The unit must be individually tested prior to such use.

10.2 Wrist mount

If you prefer a strap, pass the strap under the bars. Use the Velcro on the strap to tighten. If you prefer a bungee, then remove the screws holding the bars using a Torx screwdriver (T 20 size). Don’t use any other tool; screw heads are easily damaged. If you want to use a silicon protective sleeve, install it before installing the bungee. It is not possible to install the sleeve on the computer with bungee already installed. Pass the bungee through the threaded holes and secure with a knot. There is a special thread inside the holes which does not damage the bungee. Use a small flame to melt the braid of the bungee and make a tip on the end of it for easier pass-through. Both the strap and bungee are included. In any case, the opening on the back of the computer must remain freely accessible. When you mount the computer directly on bare skin avoid closing the opening. The pressure sensor is located there.

10.3 Control elements

The following inputs and combinations thereof are differentiated:
• Press upper key
• Press lower key
• Press both keys
• Long press upper key
• Long press lower key
• Long press both keys
• Coded key press (press both keys, then release one key and press it again, then release both keys)
• Tilt away from yourself
• Tilt toward yourself
• Tilt to the left
• Tilt to the right
• Tap the display glass
• Shine a light on the display

“Long press” means pressing the key for more than 2.5 seconds. The key-press operation is terminated at the moment the key is released or, in case of pressing both keys, when the last key is released. The upper/lower keys and directions of tilting are determined by the display orientation, depending on whether it is set up for the left or right hand. Tilting can be changed in the configuration to tapping on the computer body from any of the four sides. Note: Perform the Horizontal calibration (See section 4.8) if there is no valid response to tilting or tapping

10.4 Physical dimensions

10.5 O₂ sensor cable

The cable equipped with the Molex connectors is included in the Closed Circuit version of the Divesoft Freedom distribution package or can be ordered separately. The technical design of the connections on a specific type of rebreather is not the subject of this user manual.

Recommendation: if you are connecting an O2 sensor cable, it is advisable to plug it into the Freedom computer first and then into the oxygen sensors, although this is not always possible.

10.6 Environmental specifications

Recommended operating conditions
Recommended operating temperature range: 0 °C to 40 °C (32 °F to 104 °F)

Maximum operating conditions
Permitted short term operating temperature range: -10 °C to 45 °C (14°F to 113 °F) Consider the reduced battery capacity at low temperatures.

Long term storage conditions
Storage temperature range: 10 °C to 35 °C (50°F to 95°F) Don’t expose to direct sunlight

10.7 Compliance

10.7.1 CE marking

Divesoft s.r.o. hereby declares that the Divesoft Freedom is in compliance with the essential requirements and other relevant provisions of Directive 1999/5/EC.

10.7.2 EN 13319

Independent conformity assessment was performed to the harmodized Europian depth gauge standard EN 13319:2000.

10.7.3 FCC compliance

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

10.7.4 Industry Canada (IC) Compliance Notice

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. This Class B digital apparatus complies with Canadian ICES-003.

10.8 Disposal of waste equipment

Users in private households in the European Union This symbol on the product and accompanying documents means that used electrical and electronic products should not be mixed with general household waste. For proper treatment, recovery and recycling, please take these products to designated collection points where they will be accepted free of charge. Alternatively, in some countries you may be able to return your products to your local retailer upon purchase of an equivalent new product. Disposing of this product correctly will help save valuable resources and prevent any potential negative effects on human health and the environment, which could otherwise arise from inappropriate waste handling.

For business users in the European Union
If you wish to discard electrical and electronic equipment, please contact your dealer or supplier for further information.

Information on Disposal in other Countries outside the European Union
This symbol is only valid in the European Union. If you wish to discard this product please contact your local authorities or dealer and ask for the correct method of disposal