Ratio idive easy User manual

Sport
edition
Avantgarde
edition
iDive
User Manual
iDive Easy, iDive Deep, iDive Tech+
Warning!
OS 4.x.x for iDive is required.
ver. 4.2

2
Warning!
To receive all updates of this manual and notice of future
updates of the “iDive” by e-mail, please send a message writing
“iDive”
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 videos
soon available on www.ratio-computers.com
For assistance by mail write to [e-mail]

3
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.
To completely understand the terminology used in
this manual and the functions of the dive computer a
proper diving training is required.

4
Think Green
If possible do not print this manual.
Use your tablet or your PC to consult it .

5
INDEX
Introduction
Important Warnings
8 General Warnings
10 Danger Warning
12 Diving with Mixes
13 Limits of dive computers
13 Care and Maintenance
15 Computer’s Technical Characteristics
15 Hardware
15 Certification
16 Software
16 Summary of Technical
16 Charachteristics
17 How to recharge the battery
19 Diving in cold or freezing waters
20 DAN DL7
20 Privacy
The iDive outside water:
21 The Sleep Mode
22 Lock Screen
23 iDive menu structure
24 The watch screen
25 Watch Menu
26 DISPLAY (Screen settings)
27 SYS SET (date and time)
28 PC MODE (connection to PC/Mac)
29 TRANSMIT (Pairing with the CC Transmitter)
30 COMPASS (Compass settings)
31 Reset to Default
32 INFO (iDive Information)
33 Dive Menu
34 DIVE SET 1
39 DIVE SET 2
40 MIX (Mix settings)
41 Diving with more than 1 mix
42 CCR SET (for iDive Tech+ only)
43 DIL (Diluents) (for iDive Tech+ only)
44 PLANNER (inside NDLs)
45 PLANNER (deco planner)
46 LOGBOOK
47 ALARM (Alarms Open Circuit)

6
INDEX
The iDive after a dive
66 No-Fly
67 Desaturation info
Connect your iDive to a PC or a Mac
Update your iDive
Outdoor Functions
48 The Compass
49 Weather Forecast
50 Altimeter, barometer, termometer
51 App for iDive
L’iDive during the dive
53 Diving in Scuba mode (OC)
53 Main Data
55 Other informations about the dive
57 Deco Table during the dive
58 Mix change during the dive
59 Force a mix change during the dive
60 Change the set point during a dive (iDiveTech+ only)
61 Change the Diluent during the dive (iDiveTech+ only)
62 From CCR to OC during the dive (iDive Tech+ only)
63 GAUGE Mode
64 Free dive mode (Free)
65 Compass when diving

7
Introduction
Thank you for having purchased the RATIO® computer.
RATIO®, with the quality of its products, always stands by you to guarantee comfort, leisure and safety when diving.
Check periodically the presence of possible updates of this manual on web site www.ratio-computers.com
The manual version (e.g. 4.0) is shown on its cover.

8
Important Warnings
General Warnings
It is necessary to read this manual carefully before using the computer RATIO®. A wrong 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 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 don’t prevent possible dangers. Anyone who doesn’t know or
doesn’t accept consciously these risks, must not dive with iDive computer.
• Diving has some intrinsic risks which cannot never be completely eliminated.
No computer or diving chart can guarantee that the risk of Decompression Sickness (DCS) or Oxygen toxicity to the central
nervous system don’t exist, even if the diver follows meticulously and accurately the indications given by 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 central nervous system.

9
• 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.

10
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 behaviours 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 behaviour 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.

11
• 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 or according to the oxygen percentage contained inside the tank.
Maximum PPO2 1,4 BAR
• 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
visualised 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 .

12
Diving with Mixes
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 and never exceed the value of 1,4 BAR.
• 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 (Central 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 recognisable. Such risks concerns serious
injuries or death.

13
Limits of dive 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, the Hyperbaric Medicine doesn’t allow to eliminate totally 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. Leave 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. Store the computer in a fresh
(5°C-25°C) 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%. )

14
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 a not authorised assistance centre.
• The RATIO iDive computer is designed to be waterproof in sea water but, at the end of every dive, it must be well rinsed in
fresh water and it 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.

15
Computer’s Technical Characteristics
Hardware
The computer is made in composite material - stainless steel and mineral glass (Sport Edition) or completely in stainless
steel with sapphire glass (Avantgarde Edition).
The screen is provided with a 100% matrix display with 80x80 pixel resolution and “Superbright” backlight each Led.
Particular dedication has been put in developing a navigation system allowing the diver to have access to the dierent
settings in an easy and intuitive way.
- Sensor’s guaranteed precision: 130 mt.
- Maximum depth: 150mt / 500ft (Sport Edition) - 220mt / 721 ft (Avantgarde Edition)
- Absolute Pressure Measurement precision
min max
p = 0 .. 5bar -20 mbar +20 mbar
p = 0 .. 10bar -40 mbar +20 mbar
p = 0 .. 14bar -100 mbar +20 mbar
- Sensor’s maximum error margin in measuring Temperature: -2 / +6°C
If worn at wrist the temperature measurement in air is conditioned by body’s heat. For an accurate temperature
measurement, put the device in water or leave it far from heat sources for some minutes.
Certication
The computer’s hardware is CE and EN13319 certified.

16
Software
Algorithm: The computer uses the Bühlmann ZHL-16B and
VPM-B (iDive Deep and iDive Tech+ only) models for scuba
diving.
Summary of Technical
Charachteristics
(See the table)
RATIO® iDive Easy iDive Deep iDive Tech+
Dive Modes Air / Nitrox
Gauge / Freedive
Air / Nitrox / Trimix (normoxic)
Gauge / Freedive
Air / Nitrox / Trimix / CCR
Gauge / Freedive
Mix 2 Mix
(O2: 21% - 99%)
3 Mix
(O2: 18% - 99% / He: 0% - 40%)
10 Mix
(O2: 05% - 99% / He: 0% - 95%)
Deco model
(Algorithm) Buhlmann ZHL-16 B Buhlmann ZHL-16 B
and VPM-B
Buhlmann ZHL-16 B
and VPM-B
Algorithm
adjustment
6 User Settable
protection Levels.
6 User Settable
protection Levels.
User settable Gradient Factors
User settable Bubble Radius
RDM
(Repetitive Dives
Manag.)
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 Calculation Yes Yes Yes
Altitude adjustment Automatic Automatic Automatic
Water type Salt / Fresh Salt / Fresh Salt / Fresh
Deep Stop Yes Yes Yes
Safety Stop
adjustment Yes, Time and depth Yes, Time and depth Yes, Time and depth
Last deco stop
adjustment Yes Yes Yes
Alarms Acoustic + visual Acoustic + visual Acoustic + visual
Dive Planner No Deco Limit + Deco Planner No Deco Limit + Deco Planner No Deco Limit + Deco Planner
Wireless Air
Integration
Yes,
up to 2 transmitters
Yes,
up to 3 transmitters
Yes,
up to 10 transmitters
Compass 3D Compass, 1° resolution 3D Compass, 1° resolution 3D Compass, 1° resolution
Outdoor functions Altimeter, Barometer,
temperature, Weather forecast
Altimeter, Barometer,
temperature, Weather forecast
Altimeter, Barometer,
temperature, Weather forecast
Pedometer Yes Yes Yes
Fitness
Functions
Number of steps, distance, speed,
calories burned.
Number of steps, distance, speed,
calories burned.
Number of steps, distance, speed,
calories burned.
Other special
Functions
Stopwatch, Pitch&Roll, Magmeter,
Lunar phases, Alarm clock, Dual Time
Stopwatch, Pitch&Roll, Magmeter,
Lunar phases, Alarm clock, Dual Time
Stopwatch, Pitch&Roll, Magmeter,
Lunar phases, Alarm clock, Dual Time
Oxygen Analyser Yes (optional) Yes (optional) Yes (optional)
Backlight type Led SuperBright Led SuperBright Led SuperBright
Backlight activation
mode
Timer, Manual On&O,
Always-On in water
Timer, Manual On&O,
Always-On in water
Timer, Manual On&O,
Always-On in water
Display 100% matrix, 80x80 pixel 100% matrix, 80x80 pixel 100% matrix, 80x80 pixel
Case material: Avantgarde: Stainless Steel
Sport Edition: Composite
Avantgarde: Stainless Steel
Sport Edition: Composite
Avantgarde: Stainless Steel
Sport Edition: Composite
Glass material Avantgarde: Sapphire
Sport Edition:Mineral
Avantgarde: Sapphire
Sport Edition:Mineral
Avantgarde: Sapphire
Sport Edition:Mineral
Strap Extension: Included Included Included
Battery:
USB Rechargeable Li-ion
~ 40 hr (diving)
~ 2-3 months (Watch-mode)
~ 6-7 months (Stand-by)
USB Rechargeable Li-ion
~ 40 hr (diving)
~ 2-3 months (Watch-mode)
~ 6-7 months (Stand-by)
USB Rechargeable Li-ion
~ 40 hr (diving)
~ 2-3 months (Watch-mode)
~ 6-7 months (Stand-by)
Logbook ~160 hr scuba (sampling 10 sec) ~160 hr scuba (sampling 10 sec) ~160 hr scuba (sampling 10 sec)
Max Depth Avantgarde:220 mt / 721 ft
Sport Edition:150 mt / 500 ft
Avantgarde:220 mt / 721 ft
Sport Edition:150 mt / 500 ft
Avantgarde:220 mt / 721 ft
Sport Edition:150 mt / 500 ft
PC/Mac Connect. Yes, USB cable included Yes, USB cable included Yes, USB cable included
Updates User updatable User updatable User updatable

17
How to recharge the battery
The iDive has a rechargeable Li-Ion battery without memory eect, the given autonomy data may change of
+/-15% depending on the environment temperature. The autonomy may also change according to the device’s settings,
the installed applications, operative system version, backlight settings and use.
ATTENTION: Charge the computer completely before using it for the first time.
The recharge can be done by plugging the iDive and the provided USB cable to an USB wall charger (not included) .
We recommend to use an USB wall charger (as the one of your mobile phone/tablet) to recharge the iDive.
In case of use of a PC USB charger (not recommended), make sure that the PC doesn’t interrupt the electricity feeding when in stand-
by. Recharge the iDive with a PC is however not recommended because there is the risk to carry out only a partial recharge cycle.
Even if the iDive new generation Li-Ion battery hasn’t the memory eect, it is however recommended to recharge it completely.
The average recharge time is 3-5 hours, depending on the battery residual charge level.
Attention: Do not dive when the computer indicates 30% of charge or less.
When plugging the USB cable to recharge, the symbol => indicating the recharge in progress appears in the watch screen in 45
seconds.

18
The charging process is finished when the battery symbol disappears from the watch screen and the sleep mode is
activated.
Once the battery is completely charged, even if the device remains connected to electricity, the iDive interrupts the
electricity feeding automatically. If you leave your device in charge longer than necessary (for ex. all night long) you could
nd the iDive in Sleep Mode.
You can check your iDive charge % by pressing any button in the watch screen.
If the charging cycle is not completed the battery indicator could not be precise until the next complete recharge.
After having installed an APP or an Operative System update, we recommend to recharge your device completely.
Attention: Do not leave the iDive completely without charge for a long period (for ex. 4-5 months). This may
damage the battery. The iDive registers an alarm if left without charge for long time. This event is not covered
by warranty.

19
Diving in cold or freezing waters
The RATIO Computers can be used even in case of dives in cold or freezing waters (<3°C); however, the exposure at
particularly low temperatures, may aect negatively on the battery residual voltage.
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) 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) requires a specic training.

20
DAN DL7
The RATIO iDive 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 central database.
All these data include, besides the diving profile, also information relating to the diver (fitness
excercices, 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:
[email protected]g
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 profiles 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 iDive nor the Divelogger will send anything automatically.
100%
compatible
with
DAN DL7