Ratio Computers iX3M 2 Pro User manual

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iX3M 2
User Manual
Warning!
This manual is valid only for iX3M 2 updated
to OS 5.1.5.6/016 or above.
ver. 6.03

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ATTENTION: Changes or modications not expressly approved by the party responsible for compliance could void the user’s authority to operate the
equipment.
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.
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment o and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit dierent from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Contains Transmitter Module FCC ID: QOQWT12
Made in Italy

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Warning!
To receive all updates of this manual and notice of future
updates of the iX3M 2 by e-mail send a message writing
“iX3M 2”
to the following address: [e-mail]
This service is highly recommended
and it is completely free of charge.
For further support, have a look at the tutorial video
available on www.ratio-computers.com
For assistance by mail write to [e-mail]

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Warning!
This Manual DOES NOT replace an adequate diving training
and should be used only by those divers who have been
appropriately trained by a certified diver training organization.
The dive computer is an auxiliary instrument to the dive,
it is compulsory having always an appropriate training and
backup in order to carry out the decompression phase in case
the device is malfunctioning for any reason.
To completely understand the terminology used in this manual
and the functions of the dive computer a proper diving
training is required.

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Think Green
If possible do not print this manual.
Use your tablet or your PC to consult it .

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CONTENTS
Important Warnings
8 General Warnings
10 Danger Warning
12 Diving with Mix
13 Limits of diving computers
13 Care and Maintenance
15 Computer’s technical characteristics
15 Hardware
15 Certification
16 Software
16 Summary of Technical
16 Characteristics
17 How to recharge the Battery
19 Diving in cold or freezing waters
20 DAN DL7
20 Privacy
iX3M 2 outside the Water:
21 The main screen
22 Top part of the display
23 Middle part of the display
24 Bottom part of the display
25 iX3M 2 Menu
26 MAIN MENU
27 DIVE SET 1
28 DIVE SET 1 for RATIO iX3M 2 Pro and iX3M 2 Deep
29 DIVE SET 1 for RATIO iX3M 2 Tech+
31 DIVE SET 2
32 Deco Stop for RATIO iX3M 2 Tech+
33 CCR Settings for RATIO iX3M 2 Tech+
34 MIX Table
35 Edit a MIX
36 Diluent Table for RATIO iX3M 2 Tech+
37 App Menu
38 App Menu: MIX ANALYSER
39 Set a MIX using the Analyser
40 Gas Blender
43 NDL Planner
44 DECO Planner
45 Logbook
46 ALARMS SET (Dive Alarms)
47 SYSTEM SETTINGS
48 Display Set
49 General Set (time, date, sea pressure)
49 PC Mode (connect to a PC/Mac/Linux)
50 Reset to Default (reset the factory data)

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CONTENTS
65 Settings change during the dive
65 General Settings
67 Force a MIX CHANGE during the dive
68 Change Conservatism during the dive
69 Change the set point during a dive
X3M 2 in GAUGE mode
The iX3M 2 after a dive
71 No-Fly
72 Connect your iX3M 2 to a PC or a Mac
73 Update your iX3M 2
51 iX3M 2 after a Tissue Reset
52 TRANSMITTERS
53 Compass settings (COMPASS)
54 Model, serial number and operative system
54 SWITCH OFF (Manual switching off)
55 Compass
iX3M 2 during the dive
57 Dive Screen
57 Main Data
60 Current dive’s profile:
60 Tissues saturation when diving:
61 Deco Table:
62 Compass when diving
63 Mix Change during the dive
64 Alarms management during the dive

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Important Warnings
General Warnings
It is necessary to read this manual carefully before using the computer RATIO®. Wrongful use of this computer or its
accessories will nullify the warranty and could cause permanent damages to the device and/or its accessories.
• The diving computer DOES NOT replace an adequate diving training and should be used only by those divers who have
been opportunely trained.
• The RATIO® computer is an auxiliary instrument to the dive, so it is compulsory having always an appropriate backup
(diving chart) in order to carry out the decompression phase in case the device is malfunctioning.
• Diving involves risks relating to decompression sickness, Oxygen toxicity and other risks relating to the diving itself. Even
a careful reading of this manual and the use of this device won’t prevent possible dangers. Anyone who doesn’t know or
doesn’t accept consciously these risks, must not dive with iX3M 2 computer.
• Diving has intrinsic risks which cannot be completely eliminated.
No computer or diving chart can remove the risk of Decompression Sickness (DCS) or Oxygen toxicity to the cSELECTl
nervous system, even if the diver meticulously and accurately follows the computer or the diving chart.
• The computer cannot take into consideration the individual physiological variations which might change day by day. For
this reason it is good practice to use the device in a conservative and preventive way, remaining within the limits indicated
by the computer, to minimize the risks of DD and Oxygen toxicity to the cSELECTl nervous system.

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• The computer doesn’t replace the learning of the diving decompression charts which we recommend to have always as
backup along with a depth gauge and a watch.
• Never share a unique computer for two divers while diving; every diver must have his/her device at his/her wrist, which
can give information to him/her only.
• Never dive with a computer which has not taken into consideration the previous dives a diver made; the computer
calculation CANNOT use unknown data or take into consideration dives which it has not done.

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Danger Warning
The computer IS NOT meant for a PROFESSIONAL use.
The computer is meant exclusively for a sport, recreational or technical use.
• A use which is not compliant to what has been said above, could expose the diver to an increasing risk of incurring in the
Decompression Sickness (DCS). For this reason we discourage its use in case of professional or commercial dives, unless it is
used as an operator’s further support device.
• Before diving it is necessary to check the battery autonomy. DO NOT dive if the battery level is at 30% or at lower
percentages; make sure that the screen doesn’t show malfunctioning signs. It must be read clearly.
• Check always that settings are the ones desired. Don’t let the computer be manipulated by someone else before diving. In
this case, check that settings are the ones you desire.
• Consider that our body experience changes everyday. The computer cannot take into consideration all these changes. If
you don’t feel at your best physical conditions or if you feel physical problems, don’t dive.
• Avoid all behaviors increasing the risks connected to the DD such as rapid ascents, yo-yo dives, violation of compulsory
decompressive stops, dives with too close surface intervals and any behavior which is contrary to the common sense and
to the training received.
• This device doesn’t allow its use without having the due skill, given by a specic training.
The failure to comply with the basic rules of diving exposes the diver at death danger.

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• We recommend to do dives within the safety curve, to reduce the risks inherent to the Decompression Sickness (DCS).
• We recommend dives not deeper than 40 mt (130ft) or according to the oxygen percentage contained inside the tank.
• Respect the ascent speed recommended by the device; an excessive ascent speed exposes the diver to death danger.
• The computer calculates the total ascent time but this could be longer than the one visualised, according to some
parameters calculated by the computer during the whole dive. Trying to ascend at the correct speed and respect the
visualized depth of the stops helps to respect this time.
• Respect always the No FLY Time: never take a plane if the No FLY Time icon is still visible on the screen. Remember to plan
the last dive of the series taking into consideration the advices given by DAN (Divers Alert Network).
• Even respecting all expected intervals, the current Hyperbaric Medicine cannot exclude the onset of the Decompression
Sickness in a plane after diving .

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Diving with Mix
The safety approximation of the Mix has to be decided by the diver.
If you are not sure about the EAN safety approximation to be set for your dive, ask your diving instructor or your diving
certication agency
• Check the setting of the max PpO2.
• DO NOT DIVE without having checked the tank content with instruments that have been declared as trustworthy.
Ensure that the gas set on the computer matches with the one contained inside the tank you are going to use for diving.
The Nitrox-Trimix-CCR dives need a specic training, DO NOT dive without having received the due training.
Passing the PPO2 set and advised maximum limit imposes an ascent at minor depths and in case the CNS (CSELECTl
Nervous System) has values very close to the maximum limit, a reduction to O2 exposure is recommended.
• Use the diving computer only after having read the User’s Manual in all its parts making sure to have understood its
functioning.
In case of doubts or questions, address yourself to your instructor or to your dealer before diving.
• It is essential to know that every diver is fully responsible of his/her safety.
• Diving with gas mixes involves dierent risks in comparison with those made with standard air. A suitable training is
necessary to learn to identify and avoid these risks, which are not immediately recognizable. Such risks concerns serious
injuries or death.

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Limits of diving computers
The computer takes into consideration the most updated safety guide lines, nevertheless, it is always necessary to know
that such studies are theoretical and elaborated to reduce, not to avoid, the risk of Decompression Sickness (DCS).
At the moment, Hyperbaric Medicine doesn’t totally eliminate the risk of DD.
Care and Maintenance
• Keep the computer clean and dry. DO NOT expose the computer to chemical agents, alcohol included.
To clean the computer, use exclusively fresh water, removing all salt sediments. Let the computer dry naturally, without
using cold or warm air jets.
• Do not expose the computer to the sun directly or to heat sources higher than 50°C(120°F). Store the computer in a fresh
(5°C-25°C / 40°F-75°F) and dry place.
• Do not attempt to open, modify or repair the computer by yourself. You must always address to a RATIO dealer.
• Do not put the computer inside a hyperbaric chamber.
The computer is designed for a reading precision of +/- 2%
(the precision level required by the EC laws is +/- 3.5%. )

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The EC laws require that the unit is checked periodically from the reading precision, depth and time point of view.
• Warranty is voided if the computer is opened by an unauthorized assistance center.
• The RATIO iX3M 2 computer is designed to be waterproof in sea and fresh water but, at the end of every dive, it must be
well rinsed in fresh water. Residue of salt, dirt or chlorine could cause the malfunctioning of the buttons.
• The RATIO iX3M 2 computer is designed to be waterproof in sea and fresh water but, at the end of every dive, it must be
well rinsed in fresh water. Residue of salt, dirt or chlorine could cause the malfunctioning of the buttons.
• The Ratio iX3M 2 must NOT be dried exposing it at the direct sun light or at heat sources.
• Make sure that there is no humidity signs inside the screen.
ATTENTION: Do not try to open the computer for any reason.
Any problem, turn to a RATIO® authorised center or to RATIO® directly.

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Computer’s technical characteristics
Hardware
The computer is fully built in POM C with Makrolon cover, allowing an extreme resistance to hits and to corrosion.
The screen is provided with a Display TFT 100%; its matrix has 320x240 pixel resolution
Particular commitment has been put in developing a navigation system allowing the diver to have an easy and intuitive
access to all settings.
- Weight: 260gr
- Sensor’s precision warranty: 130 mt (426 ft)
- Maximum Depth: 300 mt (984 ft)
- Absolute Pressure Measure precision
min max
p = 0 .. 5bar -20 mbar +20 mbar
p = 0 .. 10bar -40 mbar +20 mbar
p = 0 .. 14bar -100 mbar +20 mbar
- Maximum altitude: 5000 mt (16404 ft)
- Sensor’s maximum error in measuring the temperature: -2 / +6°C
- Recharge the iX3M 2 using a PS1 category (EN 62368) (not included)
- Supply voltage: 5V c.c. +/-0.2V 500mAh
Certication
The computer’s hardware comply with CE EN13319, ETSI EN 301 489-3, EN 61000-6-1, EN 61000-6-3 requirements.

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Software
(see the table)
Summary of Technical
Characteristics
(See the table)
RATIO® iX3M 2 Pro iX3M 2 Deep iX3M 2 Tech+
Dive Modes Air / Nitrox
Gauge / Freedive
Air / Nitrox / Trimix
(normoxic)
Gauge / Freedive
Air / Nitrox / Trimix / CCR
Gauge / Freedive
Mix 3 Mixes
(O
2
: 21% - 99%)
3 Mixes
(O
2
: 18% - 99% / He: 0% - 50%)
10 Mixes (+ 3 Diluents)
(O
2
: 05% - 99% / He: 0% - 95%)
Deco model
(Algorithm)
Buhlmann ZHL-16 C
Buhlmann ZHL-12, Buhlmann ZHL-16 B,
Buhlmann ZHL-16 C and VPM-B
Buhlmann ZHL-12, Buhlmann ZHL-16 B,
Buhlmann ZHL-16 C and VPM-B
Algorithm
adjustment
6 User Settable
protection Levels.
12 User Settable protection Levels
(6 for Buhlmann and 6 for VPM)
User settable Gradient Factors
(GF Low and GF High) and
User settable Critical Bubble Radius
Algorithm adjust.
during the dive
Yes Yes Yes
Repetitive Dives
management
Yes Yes Yes
Gas switch
and Gas break Yes Yes Yes
PO2 1.2 - 1.6 1.0 - 1.6 0.4 - 1.6
CNS/OTU Calculation Yes Yes Yes
Altitude adjustment Automatic Automatic Automatic
Water type Salt / Fresh Salt / Fresh Salt / Fresh
Deep Stop Yes Yes (Standard+Pyle) Yes (Standard+Pyle)
Safety Stop
adjustment Yes, Time and Depth Yes, Time and Depth Yes, Time and Depth
Last deco stop
adjustment Yes Yes Yes
All Deco stops
Manual adjustment
No No Yes
Alarms Vibration + acoustic + visual Vibration + acoustic + visual Vibration + acoustic + visual
Dive Planner
No Deco Limit + Full Deco Planner No Deco Limit + Full Deco Planner No Deco Limit + Full Deco Planner
Wireless
Air Integration
Yes, up to 3 Transmitters
(optional)
Yes, up to 3 Transmitters
(optional)
Yes, up to 10 Transmitters
(optional)
Multi Transmitter
Side Mount
Yes, up to 2 Transmitters
(optional)
Yes, up to 3 Transmitters
(optional)
Yes, up to 10 Transmitters
(optional)
Nitrox Analyser
Yes (optional) Yes (optional) Yes (optional)
Compass 3D Compass, 1° resolution 3D Compass, 1° resolution 3D Compass, 1° resolution
Bluetooth Smart (5.0)
Yes Yes Yes
Other
Functions
Gas Blender, Barometer,
Temperature
Gas Blender, Barometer,
Temperature
Gas Blender, Barometer,
Temperature
Color Display
IPS, 2.8-Inch, 320x240 pixel,
144 dpi, 100% matrix
IPS, 2.8-Inch, 320x240 pixel,
144 dpi, 100% matrix
IPS, 2.8-Inch, 320x240 pixel,
144 dpi, 100% matrix
View angle
over 150° (IPS Technology) over 150° (IPS Technology) over 150° (IPS Technology)
Backlight level Yes, user settable Yes, user settable Yes, user settable
Top Glass
Mackrolon Mackrolon Mackrolon
Buttons
Mechanical buttons, Stainless Steel Mechanical buttons, Stainless Steel Mechanical buttons, Stainless Steel
Straps Redundant Stretch-Belts
(Bungees included)
Redundant Stretch-Belts
(Bungees included)
Redundant Stretch-Belts
(Bungees included)
Battery: USB Rechargeable Li-ion
~20 hrs in dive mode
USB Rechargeable Li-ion
~20 hrs in dive mode
USB Rechargeable Li-ion
~20 hrs in dive mode
Logbook
~160 hr scuba (sampling 10 sec) ~160 hr scuba (sampling 10 sec) ~160 hr scuba (sampling 10 sec)
Max Depth
220 mt / 721 ft 220 mt / 721 ft 220 mt / 721 ft
PC/Mac Connect.
Yes, USB cable included Yes, USB cable included Yes, USB cable included
Updates User updatable User updatable User updatable
Upgrade Yes, to iX3M 2 Deep Yes, to iX3M 2 Tech+ -

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How to recharge the Battery
The RATIO iX3M 2 has a Li-Ion rechargeable battery without memory eect.
The autonomy data which are shown can change of +/- 15% depending on the environmental temperature, the device
settings, the installed applications, the operative system version, the back light setting and the use of its inner (Bluetooth)
or external (Analyser, Transmitter) peripheral devices.
ATTENTION: A complete charge cycle is necessary before the device first use.
Watch the video
123
456

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To recharge the RATIO iX3M 2 we recommend to use a USB wall charger (like the one of your mobile/tablet).
If you decide to use a PC USB plug (deprecated), make sure that the PC doesn’t interrupt the electricity ow once in stand-by.
Even if the RATIO iX3M 2 has a new generation battery without memory eect, we recommend to recharge the battery
completely.
The average recharge time is 4-5 hours depending on the residual charge level.
Attention: It is suggested to not dive if the computer shows <30% of battery.
Do not dive if the computer shows <20% battery.
When connecting the USB cable to recharge the device, the symbol => will appear in the watch screen within 45 seconds.
It means that recharging procedure is in progress. When the recharge is nished the symbol => will disappear.
Once the battery charge is finished, even if the device remains connected to the plug, the computer automatically
interrupts the electricity ow. In case the device is left in charge more than necessary (e.g. all night
long), you could nd it switched o. You can check the computer charge level pressing any button; the
battery percentage can be visualized on the screen’s left upper corner.
If the device is in charge and no button is pressed for more than 10 minutes, the back light is reduced
to the minimum, to allow a faster recharge cycle.
If the recharge cycle is not completed, the battery indicator might not be precise until the next complete
recharge cycle is carried out.
Attention: Do not leave the iX3M 2 completely without charge (0%) for a long period (e.g. 1-2
months). This may damage the battery. The iX3M 2 registers an alarm if left without charge for
long time. This event is not covered by warranty.

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Diving in cold or freezing waters
The RATIO iX3M 2 can be used even in case of dives in cold or freezing waters (<3°C / <37°F); however, the exposure at
particularly low temperatures, may negatively aect the residual battery voltage and the precision of the sensor
When diving in cold or freezing waters, the battery voltage may decrease more rapidly than normal. So, we recommend to
recharge the battery before diving in extreme conditions.
ATTENTION: when diving in cold or freezing waters (<3°C / <37°F) recharge the device at 100% or make sure that
there is at least 50% of battery power.
ATTENTION: Diving in cold or freezing waters (<3°C / <37°F) requires a specic training.

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DAN DL7
The RATIO iX3M 2 is 100% compatible with the program for gathering data DAN DL7 of DSL Level 5
The DAN DL7 is a format owned by DAN, which summarizes all necessary information which are
needed for the studies, arranging them to be sent directly to DAN Europe’s cSELECTl database.
All these data include, besides the diving profile, also information relating to the diver (fitness
exercices, the medicines he/she ingested etc) and to the dive itself (possible problems, thermal
conditions etc).
Contributing to the data gathering is easy: you just have to ll in all elds relating to the program DAN DSL (Diving Safety
Laboratory) inside the Divelogger, export them in the format DAN DL7 and send them by e-mail to:
[e-mail]
Give your diving profiles to the Research!
The prole of a dive made with a self breathing device contains extremely important information, such as the time spent in
the depth, the ascent speed, how many dives enter in decompression, how many dives contain deep stops etc.
Giving our own diving proles to the Research means to give a great help to DAN’s scientists who, with great dedication
and passion, are trying to render the diving activity more and more safe.
Privacy
Unless you send your data, neither the RATIO iX3M 2 nor the Divelogger will send anything automatically.
100%
compatible
with
DAN DL7