Azoth Systems O'Dive User manual

O’Dive sensor
Complete instruction manual
Updated on 23/10/2020
Download of the O’Dive app is required
https://www.o-dive.com

O’Dive instruction manual Updated on 23/10/2020
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WARNING
The O’Dive sensor is an ultrasonic Doppler acoustic device connected to an application
designed to measure and control over time the decompression procedures’adequacy to the
diver.
Although relying on the measurement of physiological parameters to produce a result, O'Dive
technology does not provide medical advice and does not fall into the category of medical
devices (ANSM audit report - October 2020).
The features of the service imply practicing diving in a club or individually. O'Dive is not a
medical device and does not provide medical advice.
Any advice or other items available in our service are intended solely for general information
purposes. They are not intended to serve as a unique reference or to substitute professional
medical advice based on the personal situation of the user.
Azoth Systems disclaims any responsibility for actions taken by the user because of advice and
information provided by the service. In particular, if the user has not consulted a medical
doctor and does not have a medical certificate authorizing him to practice diving.
Direction of use
For a given dive (depth, duration and decompression stops), it is recognized by the scientific
community that a decompression procedure resulting in no or a few microbubbles is more
recommended than a procedure generating high levels of bubbles.
The O'Dive solution assists the diver in this view to help him adapt and improve his practice,
limiting his bubble level, and therefore increasing his diving safety level.
The sensor measures the microbubble rate in the diver venous system following a dive.
Combined to the diving parameters, these measurements allow the calculation of a parameter
reflecting the quality of the decompression procedure used.
If the procedure is not optimal, the O'Dive app put at the diver's disposal a customized
simulator allowing him to visualize the effects of several possibilities to improve the quality of
his procedure while making progress in his practice.
By using regularly O’Dive technology, the diver will improve his self-understanding. He will
therefore be more likely to wisely adjust his decompression procedures and diving practice
towards more safety.
Decompression sickness (DCS) are intrinsically related to the dissolved gas charge in the
diver's body. The O'Dive solution is designed to help the diver advance his practice by better
understanding the effects of decompression. It does not claim in any case, even when the
quality index is 100%, that no risk of DCS is incurred by the diver. Zero risk does not exist.
The only way to avoid exposure to DCS is not to dive.

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Table of contents
WARNING ...................................................................................................................................2
Direction of use ..........................................................................................................................2
O’DIVE Perimeter and usage restriction ....................................................................................4
Cases not handled by O'Dive..................................................................................................4
Data input...............................................................................................................................4
Open-circuit –Air/Nitrox........................................................................................................4
Open-circuit –Trimix/Heliox ..................................................................................................5
Closed-circuit –Air/Trimix/Heliox diluent..............................................................................6
Step-by-step guide for using O’Dive...........................................................................................7
Step 1 –Charging the sensor..................................................................................................7
Step 2 –Downloading the O’Dive app ...................................................................................7
Step 3 –Taking in hand the sensor ........................................................................................8
Step 4 –Registering / Logging in............................................................................................9
Step 5 –Taking measurements ..............................................................................................9
Step 6 –Validating dive parameters and uploading data....................................................11
Step 7 –Evaluating your procedures ...................................................................................11
Step 8 –Upgrading the application to another version.......................................................12
Support - Contact .....................................................................................................................13
Legal Notice..............................................................................................................................13

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O’DIVE Perimeter and usage restriction
Cases not handled by O'Dive
When using the O'Dive app, limits are set for the validation of the dives, because the intrinsic
risk is considered too high beyond these.
The following cases are not handled by O'Dive:
•Open circuit:
oAir dives beyond 60m
oTrimix/Heliox dives beyond 125m
oDives where the bottom PpO2exceeds 1.6 bar
oDives where the decompression PpO2exceeds 1.65 bar
•Closed circuit:
oDives with Air diluent beyond 50m
oDives with Trimix/Heliox diluent beyond 125m
oDives with PpO2bottom above 1.6 bar
oDives with PpN2bottom above 4.7 bar
oDives with PpO2deco above 1.65 bar
Data input
For any version of the O'Dive app, the dive parameters can be entered either:
oby manual input: the user must manually enter the different parameters of his dive
(depth, total time, decompression time, gases breathed, ...)
oby data import (from a Shearwater computer, Subsurface cloud or Suunto cloud): the
exact profile of the dive is imported, and the user must then fill in the missing fields.
Fields that are not filled in correctly can lead to results that do not reflect the actual quality
of the decompression.
Open-circuit –Air/Nitrox
The following section applies to open circuit dives where the bottom gas is Air or a Nitrox mix,
with or without the use of oxygen-enriched mix(es) during stops.
•Manual input:
Multi-level dives are handled. They are approximated by an equivalent square dive
based on the parameters entered by the diver on the app: maximum depth, total dive
time and actual decompression time indicated by the dive computer. Any additional
stops that the diver may have followed are considered to evaluate their benefit with
respect to the severity of the exposure.
Successive and multiple dives, i.e. with a surface interval less than 12 hours, can be
analyzed (e.g. cruise with several dives per day). The residual gas load is considered
from the moment the diver uses the same computer for his various dives.

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Unsuitable ascending speeds cannot be detected with the manual data entry mode
offered by O'Dive Sport and O'Dive Advanced. Thus, the results sent to the diver do
not consider this additional risk factor for these versions.
The ascending speeds are entered using the manual data entry mode offered by
O'Dive CCR and O'Dive Technical. Thus, unsuitable ascending speeds are considered
in the results sent back to the diver.
Sawtooth profiles cannot be detected with the manual input mode proposed by
O'Dive. Thus, the results sent back to the diver do not consider this additional risk
factor.
•Data import:
Multi-level dives are handled.
Successive dives are not yet handled. An upcoming version allowing to manage them
is currently under development.
Unsuitable ascending speeds are considered in the results sent back to the diver.
Sawtooth profiles cannot be detected. Thus, the results sent back to the diver do not
consider this additional risk factor.
Open-circuit –Trimix/Heliox
The following section applies to open circuit dives where the bottom gas is a Trimix or a Heliox
mix, with or without the use of oxygen-enriched mix(es) during stops.
•Manual input:
This mode is reserved for square dives, i.e. dives in which the amplitude of variation
of the bottom depth is small compared to the maximum depth reached (+/-5m), such
as wreck diving.
Successive dives, i.e. with a surface interval less than 12 hours, are not handled yet.
An upcoming version allowing to manage them is currently under development.
Unsuitable ascending speeds are considered in the results sent back to the diver.
Sawtooth profiles cannot be detected. Thus, the results sent back to the diver do not
consider this additional risk factor.
•Data import:
Multi-level dives are handled.
Successive dives, i.e. with a surface interval less than 12 hours, are not handled yet.
An upcoming version allowing to manage them is currently under development.
Unsuitable ascending speeds are considered in the results sent back to the diver.
Sawtooth profiles cannot be detected. Thus, the results sent back to the diver do not
consider this additional risk factor.

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Closed-circuit –Air/Trimix/Heliox diluent
The following section applies to closed-circuit dives where the diluent gas is Air, or a Trimix or
a Heliox mix, with or without the use of oxygen-enriched mix(es) during stops.
•Manual input:
This mode is reserved for square dives, i.e. dives in which the amplitude of variation
of the bottom depth is small compared to the maximum depth reached (+/-5m), such
as wreck diving.
Successive dives, i.e. with a surface interval less than 12 hours, are not handled yet.
An upcoming version allowing to manage them is currently under development.
Unsuitable ascending speeds are considered in the results sent back to the diver.
Sawtooth profiles cannot be detected. Thus, the results sent back to the diver do not
consider this additional risk factor.
•Data import:
Multi-level dives are handled.
Successive dives, i.e. with a surface interval less than 12 hours, are not handled yet.
An upcoming version allowing to manage them is currently under development.
Unsuitable ascending speeds are considered in the results sent back to the diver.
Sawtooth profiles cannot be detected. Thus, the results sent back to the diver do not
consider this additional risk factor.

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Step-by-step guide for using O’Dive
Step 1 –Charging the sensor
Before each use of the sensor, it is important that it is sufficiently charged in order to have the
necessary autonomy to the realization of your measurements.
IMPORTANT: It is strongly advised to make sure that the sensor is properly charging before
leaving it on its charging base, in order to avoid discharging and deterioration of the battery.
• Connect the induction charger to a 5V-2A adapter or to a USB port.
• Position the O’Dive sensor on the charger, face with markings in contact with the induction
charger. When the sensor is in the right position, the sensor LED will flash in green, indicating
that the sensor is charging (and the charging pad goes to steady green for a few seconds
before switching off). If the battery is full enough, the LED will flash rapidly 5 times, then slowly
2 times, and will stop.
• If the sensor LED does not flash in green, adjust the sensor position on the charger.
• If the sensor LED is flashing in yellow, remove the sensor from the charging base, let it cool
down, then put it back and adjust the sensor position on the charger.
• If the sensor LED is flashing in red, remove the sensor from the charging base, then put it
back and adjust the sensor position on the charger.
• If the sensor starts (vibration + blue flashing), remove the sensor from the charging base and
turn it off, then put it back and adjust its position on the charging base.
• At the end of the charge (maximum duration of 6 hours), the LED will stop. Your sensor is
then ready to be used.
Step 2 –Downloading the O’Dive app
The sensor is operating with the O’Dive app, available on the Apple Store and on Google Play.
The application is initially in the Sport version. After having entered the sensor number and
made a blank synchronization (see steps 4 and 6), the application automatically upgrades to
the correct version (Advanced, CCR or Technical).

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Step 3 –Taking in hand the sensor
Starting the sensor
To start the sensor, press for 1 second the button located
on its top. The sensor vibrates and the LED will flash rapidly
in blue (1 flash per second for 90 seconds) signaling the
possibility of pairing a phone.
A red flashing LED indicates a low battery level. In this
case, the sensor has to be charged as soon as possible. (see
step 1).
Turning the sensor off
There are 3 ways you can turn off your sensor:
- Press the on/off button
for 3 seconds (the flashing
LED stops and the sensor
vibrates)
- Disable the WIFI
connection on your
smartphone
- Place the sensor on the
induction charging station
(see step 1)
Technical Characteristics
Mass
Less than 0.5 kg
Sensor dimensions (L x W x H)
Ø74 x 34.6 mm
Doppler frequency
2MHz
Endurance
2.5 hours in continuous emission
Battery
Rechargeable LiPo (Lithium Polymer)
Battery power
7.4V –600mAh
Recharge
Induction –2A
Wireless connection
Wi-Fi
Operation temperature range
0°C –40°C
Storage temperature range
-35°C –65°C
Humidity
35% - 85% RH
Conformity
CE
The sensor can be cleaned with a damp cloth after use.
button
+ LED

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Step 4 –Registering / Logging in
-Before using the sensor, you need to create an account on the app.
-Open the app and press the button Register. If someone is already logged in, press the
button Account on the top right corner of the home, then press the button Register.
-Follow the steps.
-In case you always use the same sensor, fill the field ‘Sensor number’ (you can scan the
QR code on the tag, type the number with the keyboard, or select the sensor Wi-Fi -
on Android only).
-Do not forget to accept the Terms of Use (TOU).
If you already have an account, press Log in and fill in your email address and password.
Step 5 –Taking measurements
Measurements must be undertaken after diving, when the rate of gas microbubbles in the
blood is potentially the highest.
Four measurements (each 20 seconds long) will be carried out:
• 30 minutes following the dive*: one under the left clavicle then one under the right clavicle;
• 60 minutes after the dive:one under the left clavicle then one under the right clavicle.
*For dives with a helium fraction higher as the nitrogen one, we recommend performing the
first series of measurements as soon as possible after surfacing, without, however, making
additional efforts through possible precipitation.
IMPORTANT: It is strongly advised to watch the tutorial on the app to fully understand how
to position the sensor. An incorrect sensor positioning under the clavicle will result in bad
measurements and, therefore, an impossibility to analyze the signals. Please practice
positioning of the sensor in front of a mirror before making measurements after your dives.
Before any measurement, make sure that your name is displayed on the top of the screen.
If it is not the case, press Account and log in or register (see step 4).

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-Select New measurement: the app creates a new dive and requests you to start your
sensor.
-Check that the proposed sensor number is matching your device. If not, press Change
sensor, fill the sensor number (see step 4) and validate. Start the measurement again
by pressing New measurement then Use current dive.
-When the sensor number is correct, start your sensor (see step 3), then press Connect
on the app. The sensor will now pair with your smartphone via Wi-Fi. Important: data
sharing via Wi-Fi needs to be deactivated.
-When the pairing is done, the LED starts flashing in green, the Start button becomes
accessible, and the battery pictogram on the top right corner of the screen gets
activated.
-Follow the app’s steps to perform the two measurements.
-Before starting the recording, a screen allows you to check the correct positioning of
the sensor using a spectrogram.
Recommendations:
- The visual objective is to obtain a periodic yellow-red signal whose height and
length will be as large as possible.
- To confirm the positioning, stand still for a few seconds and breathe deeply.
- Apply moderate pressure so as not to "chase" the gel off the sides of the sensor.
Correct positioning:
Excellent positioning:
Incorrect positioning:
-When you have found the correct positioning, press Start to launch the measurement.
From this point on:
oDo not try to "improve" the signal by moving the sensor.
oBreathe very deeply without forcing, following the sinusoid.
oDo not make any arm or shoulder movements and do not cause muscle
contraction.
-If the measurement is unsatisfactory, the application will prompt you to repeat the
measurement. Make sure that the sensor is correctly positioned and that you follow
the instructions given (no talking, relaxed arm, forced breathing).
-At the end of a series of two measurements (left then right), the sensor switches off
automatically.