DiveNav Nitroxbuddy2 User manual

SMART Oxygen Analyzer
User Manual

Nitroxbuddy2 User Manual – Rev. 20170512 ©2017 DiveNav, Inc. – www.divenav.com Page 2
TABLE OF CONTENTS
1WELCOME......................................................................................................................3
2NITROXBUDDY2 OVERVIEW ........................................................................................3
3WARNINGS.....................................................................................................................3
4BEFORE FIRST USE......................................................................................................3
5QUICK GUIDE.................................................................................................................3
6SETTINGS.......................................................................................................................4
6.1 BUTTON............................................................................................................................4
6.2 DISPLAY ...........................................................................................................................4
6.3 MENUS NAVIGATION..........................................................................................................4
7OXYGEN SENSOR .........................................................................................................5
7.1 O2 SENSOR CALIBRATION .................................................................................................5
7.2 O2 SENSOR REPLACEMENT...............................................................................................5
8BATTERY........................................................................................................................6
9WARRANTY....................................................................................................................6
9.1 LIMITATION OF LIABILITY....................................................................................................6
9.2 EXCLUSIONS AND LIMITATIONS ..........................................................................................6
9.3 REMEDY ...........................................................................................................................6
9.4 WARRANTY DISCLAIMER....................................................................................................6
9.5 OBTAINING WARRANTY SERVICE .......................................................................................7
10 FCC.................................................................................................................................7
10.1 FCC COMPLIANCE STATEMENT..........................................................................................7
10.1 FCC CAUTION...................................................................................................................7
11 COPYRIGHT NOTICE.....................................................................................................7

Nitroxbuddy2 User Manual – Rev. 20170512 ©2017 DiveNav, Inc. – www.divenav.com Page 3
1 WELCOME
Thank you for purchasing Nitroxbuddy2, the world first
SMART Oxygen Analyzer specifically designed for Scuba
divers.
You can use Nitroxbuddy2 either as a stand-alone
device or connected to your smartphone via Bluetooth.
When you use Nitroxbuddy2 together with the My
Nitroxbuddy App you can analyze your scuba tanks using
your smartphone or tablet. You can also save logs of your
analysis and add to them useful information such as
images, tank info, fill cost, and dive operator.
You can also use the My Nitroxbuddy App to determine
the Maximum Operating Depth and the Equivalent Air
Depth. Check on our website how to get the My Nitroxbuddy
app.
2 NITROXBUDDY2 OVERVIEW
Nitroxbuddy2 can analyze gasses with Oxygen content
from 0.3% to 99.9%.
Nitroxbuddy2 features a user rechargeable Li-Ion
battery, a Dot-matrix LCD display and a Bluetooth low
energy transceiver so it can be programmed and/or
controlled with a smartphone or a tablet.
The Nitroxbuddy2 housing includes an integrated tank
adapter so it can be used to analyze a gas directly from a
SCUBA tank. Additionally DiveNav offers a low pressure BC
adapter accessory that mounts directly on the housing.
3 WARNINGS
WARNING: Scuba Diving is a dangerous activity.
Diving with an incorrect breathing gas mix could lead to
serious personal injury and even death. Make sure you
know how to properly calibrate and use your
Nitroxbuddy2. Read and follow the instructions
contained in this manual.
WARNING: Nitroxbuddy2 includes an Oxygen
sensor that must be calibrated before each use. An
improper calibration may result in the use of an
incorrect breathing gas mix, which could lead to
serious personal injury and even death.
WARNING: Do not use Nitroxbuddy2 if you are not
Nitrox certified.
WARNING: Do not use Nitroxbuddy2 if it is not
calibrated.
WARNING: Keep Nitroxbuddy2 away from heat
sources.
WARNING: Do not expose Nitroxbuddy2 to direct
sunlight.
WARNING: Do not place Nitroxbuddy2 under heavy
object such as scuba tanks.
WARNING: Store Nitroxbuddy2 in a dry place.
WARNING: Do not immerse Nitroxbuddy2
underwater.
WARNING: Nitroxbuddy2 includes an
electrochemical sensor containing potassium
hydroxide which can cause burns if it comes in contact
with eyes, skin and other body parts. Dispose of
sensors according to local regulations.
WARNING: Nitroxbuddy2 is designed for use at
atmospheric pressures only. It is not designed for use
in a hyperbaric chamber. Use of Nitroxbuddy2 in a
hyperbaric chamber will result in incorrect readings and
may damage the unit.
4 BEFORE FIRST USE
When you unpack your Nitroxbuddy2 make sure you
have received all the accessories; if you have ordered a
basic Nitroxbuddy2 you should have received also an USB
charging cable. If you have ordered a Nitroxbuddy2
DELUXE, in addition to the USB cable you should have also
received a carrying case and the Low Pressure Inflator
adapter. Please note that the carrying case is NOT
waterproof.
Before you use your Nitroxbuddy2 for the first time make
sure that it has not been damaged during shipping or that
internal components did not came loose. First check
Nitroxbuddy2 for any sign of damage then gently shake it
and listen for any rattling sound.
Now turn ON your Nitroxbuddy2 by pushing the
activation button and check for the battery symbol to be full.
If not, place Nitroxbuddy2 under charge for a couple of
hours.
5 QUICK GUIDE
To turn ON your Nitroxbuddy2 just push the activation
button; Nitroxbuddy2 will first show a welcome screen and
then, if there are no errors or warnings conditions, will enter
the main screen.
See the SETTINGS section for more details on errors or
warnings conditions and the various operating screens
supported by Nitroxbuddy2.
There is no need to turn OFF your Nitroxbuddy2 as it will
automatically go to sleep after a couple of minutes. You can
program the sleep time using the My Nitroxbuddy app.

Nitroxbuddy2 User Manual – Rev. 20170512 ©2017 DiveNav, Inc. – www.divenav.com Page 4
The Oxygen sensor calibration lasts only few hours, so,
before you can use your Nitroxbuddy2 you must calibrate its
Oxygen sensor. In fact, it is good practice to calibrate the
Oxygen sensor before each use.
With Nitroxbuddy2 you can perform an Oxygen sensor
calibration either with the stand-alone unit or with the
assistance of a smartphone.
The stand-alone, manual Oxygen calibration is limited
to air, it is time based and it takes 1 minute while the
smartphone assisted Oxygen calibration has more flexibility;
as an example, using the My Nitroxbuddy app you can
calibrate the Oxygen sensor using any single reference gas
or you could even perform a 2-point calibration using two
reference gasses. See the My Nitroxbuddy app tutorial on
www.divecomputertraining.com for more information.
To perform a manual Oxygen sensor calibration with the
stand-alone unit, first turn the unit ON by pushing the
activation button, then, once Nitroxbuddy2 is in the main
screen, HOLD the button for 2 or more seconds to enter the
main settings screen. From there, push the button once for
about 1 second to select O2 CAL and then HOLD the button
to enter the O2 calibration screen.
During an Oxygen sensor calibration it is very important
to expose Nitroxbuddy2 to a known source of gas flowing at
a constant rate. If you plan to perform an Oxygen sensor
calibration by exposing Nitroxbuddy2 to ambient air
MAKE SURE Nitroxbuddy2 acclimates for at least 5
minutes as the gas flow within the device is reduced
and a shorter period might produce incorrect results.
Now, position your Nitroxbuddy2 in front of the valve of a
scuba tank containing air and open the tank valve slowly so
to limit the gas flow to few liters per minute. If you have
ordered the Low Pressure Inflator adapter then you can
connet your Nitroxbuddy2 directly to the low pressure hose.
Once you are ready PUSH the activation button to start the
Oxygen sensor calibration.
As mentioned above, the stand-alone, manual Oxygen
calibration is limited to air, it is time based and it takes 1
minute.
Now that Nitroxbuddy2 is calibrated, go ahead and use
it; if the unit is asleep turn it ON by pushing the activation
button, then, once Nitroxbuddy2 shows the main screen,
position your Nitroxbuddy2 in front of the valve of the scuba
cylinder containing the breathing gas you want to analyze
and open the tank valve slowly so to limit the gas flow to few
liters per minute.
Hold steady and after few seconds you will see the
value of Oxygen updating on the display. We recommend to
hold the analyzer in position for about 60 seconds.
Once the analysis is completed you have the option to
hold the results on the screen for about 60 seconds; to do
so, just push the button until you see the letter “H” next to
O2 on the top of the display.
6 SETTINGS
6.1 Button
Nitroxbuddy2 ‘s single button has two modes: PUSH or
HOLD.
PUSH is when you push the button for about one
second and then you release it.
HOLD is when you push the button for more than 2
seconds and then you release it.
For multiple pushes, like when navigating a sub-menu,
you will need to wait about one second between
consecutive pushes.
6.2 Display
Nitroxbuddy2 is equipped with a Dot-Matrix LCD display
with user programmable backlight; you can program the
intensity of the backlight and its duration.
The image below shows the Normal Operating Mode
screen.
The bluetooth symbol could be either OFF, ON or
flashing. When it is flashing it means that Nitroxbuddy2 is
advertising its presence and it is ready to be connected to a
smartphone equipped with the My Nitroxbuddy app.
If the bluetooth symbol is always ON it means that
Nitroxbuddy2 is actually connected to a smartphone.
If the bluetooth symbol is OFF it means that the radio is
sleeping.
To awake the bluetooth radio just PUSH the activation
button and the bluetooth symbol will begin to flash and will
continue to do so for about 2 minutes. After that period that
bluetooth radio will go back to sleep.
6.3 Menus Navigation
The navigation among the various menus is done via a
combination of HOLD and PUSH. In general a HOLD enters
a sub-menu while a PUSH moves the cursor to the next
item in the menu.
To enter the Main Settings menu from the Normal
Operating Mode just HOLD the button.
Please note that the stand-alone settings are accessible
only when Nitroxbuddy2 is NOT connected to a
smartphone.
If you try to access the Main
Settings menu while the analyzer is
connected to a smartphone, the
analyzer will display a warning screen
and will give you the option to
disconnect from the smartphone.
This image on the right shows the
Main Settings menu.
This menu contains 5 sub-menus: BACK, O2 CAL,
SENSOR, LIGHT and DATE.
To access a sub-menu first position the > pointer on the
line you want to select by as many PUSH as required then
enter the sub-menu by a HOLD.

Nitroxbuddy2 User Manual – Rev. 20170512 ©2017 DiveNav, Inc. – www.divenav.com Page 5
If you HOLD when BACK is selected you will go back to
the previous menu. In the case of the image above you will
go back to the Normal Operating Mode.
The S symbol on the top row indicates that you are in
the settings operating mode.
The O2 CAL sub-menu allows you to perform an
Oxygen sensor calibration.
The SENSOR sub-menu allows you to access settings
for the Oxygen sensor.
The LIGHT sub-menu allows you to program intensity
and duration of the backlight.
The DATE sensor allows you to program date and time.
Please note that the settings available in stand-alone
mode are a sub-set of the full set of settings available with
the My Nitroxbuddy app.
See below the top level view of Nitroxbuddy2 menus.
7 OXYGEN SENSOR
Nitroxbuddy2 comes equipped with an electrochemical
Oxygen sensor. The life of an Oxygen sensor is difficult to
estimate as it might be affected by several factors such as
usage, exposure to a gas with high content of Oxygen,
temperature and humidity.
Also, an Oxygen sensor does not die immediately but
slowly degrades over time.
We recommend to replace the factory installed Oxygen
sensor every 12 months. But, if you are in the middle of a
dive trip you can simply extend the life of the O2 sensor by
simulating a replacement either in stand-alone mode or via
the My Nitroxbuddy app.
Please note that it is YOUR responsibility to set the
sensor life correctly. The analyzer only provides you a
reminder but it has absolutely no knowledge if the lifetime
you entered is correct for the O2 sensor you are using.
7.1 O2 Sensor Calibration
As indicated earlier, with Nitroxbuddy2 you can perform
an Oxygen sensor calibration either with the stand-alone
unit or with the assistance of a smartphone.
To calibrate the Oxygen sensor
while in stand-alone mode, first turn
the unit ON.
Then, while the unit is in the
Normal Operating Mode, HOLD the
button and enter the Main Settings
menu.
Now, PUSH the button to position
the pointer on the O2 CAL sub-menu
as per image on the right.
Now, HOLD the button to enter
the Oxygen Sensor calibration sub-
menu show in the image on the left.
As indicated earlier, HOLD
enters the sub-menu selected by the
pointer while a PUSH moves to the
next line down. In this specific case,
HOLD will go back to the previous
menu while PUSH will start the
calibration of the Oxygen sensor.
During an Oxygen sensor calibration it is very important
to expose Nitroxbuddy2 to a known source of gas flowing at
a constant rate.
WARNING: If you plan to perform an Oxygen sensor
calibration by exposing Nitroxbuddy2 to ambient air
MAKE SURE Nitroxbuddy2 acclimates for at least 5
minutes as the gas flow within the device is reduced
and a shorter period might produce incorrect results.
Now, position your Nitroxbuddy2 in front of the valve of a
scuba tank containing air and open the tank valve slowly so
to limit the gas flow to few liters per minute. If you have
ordered the Low Pressure Inflator adapter then you can
connect your Nitroxbuddy2 directly to the low pressure
hose.
Once you are ready PUSH the activation button to start
the Oxygen sensor calibration and Nitroxbuddy2 will
alternate the 2 screens below until the O2 calibration is
completed.
As mentioned above, the stand-alone, manual Oxygen
calibration is limited to air, it is time based and it takes about
one minute.
7.2 O2 Sensor Replacement
In order to replace the Oxygen sensor you will need first
to open Nitroxbuddy2 by removing the 3 screws on the back
of the unit and the large O-ring on the tank adapter.
Then disconnect the molex connector from the old O2
sensor and connect it to the new one.
Make sure you also install on the
new O2 sensor the 2 extra O-rings that
were previously mounted on the old O2
sensor as they are needed to keep the
sensor in place inside the enclosure.
Once you are done, go the Main
Settings menu and PUSH the button to
position the pointer on the SENSOR
sub-menu.
Then HOLD the button to enter the SENSOR sub-menu.

Nitroxbuddy2 User Manual – Rev. 20170512 ©2017 DiveNav, Inc. – www.divenav.com Page 6
Now scroll down to select the
CHANGE sub-menu and enter it.
Now, PUSH the button to confirm
that you have replaced the Oxygen
sensor and Nitroxbuddy2 will
acknowledge it and turn off after a few
seconds.
Please note that when you replace the Oxygen sensor
while in stand-alone mode, Nitroxbuddy2 will automatically
assign to the O2 sensor a lifetime of 12 months.
WARNING: the Oxygen sensor contains chemicals
which can cause burns if they come in contact with
eyes, skin and other body parts. Dispose of the Oxygen
sensor according to local regulations.
8 BATTERY
Nitroxbuddy2 is equipped with a user replaceable LIR
10440 AAA 3.7V rechargeable battery that can be easily
recharged using the provided USB cable. We strongly
recommend you keep the battery properly charged all times.
WARNING: If you do not keep the battery properly
charged the battery might die off and you might not be
able to recharge it all.
WARNING: If you let the battery become very empty
or even die, it might take several hours to recharge it.
9 WARRANTY
DiveNav, Inc. (the “Company”) warranty obligations for
Nitroxbuddy2 (the “Product”) are limited to the terms set
forth in this document as well as those set forth in the
Warranty section of the company website.
Company warrants the Product against substantial
defects in material and workmanship under normal use for a
period of one (1) year from the date of original purchase
(the “Limited Warranty”).
This Limited Warranty is non-transferable and covers
only the original purchaser.
An original or copy of the sales receipt from the original
sales retailer or Company website is required to validate the
warranty coverage.
This Limited Warranty does not cover the battery and
products purchased through non-authorized dealers.
Warranty claims must be made directly to the Company.
9.1 Limitation of Liability
IN NO EVENT SHALL COMPANY, NOR ITS
AFFILIATES, NOR ITS EMPLOYEES, OFFICERS,
DIRECTORS, AGENTS, CONTRACTORS,
DISTRIBUTORS, SUPPLIERS OR ASSIGNS (THE
“RELEASED PARTIES”) BE LIABLE TO YOU OR ANY
THIRD PARTY FOR ANY INDIRECT, INCIDENTAL,
CONSEQUENTIAL, SPECIAL, EXEMPLARY OR PUNITIVE
DAMAGE ARISING OUT OF THE USE OF THE
PRODUCT, INCLUDING, WITHOUT LIMITATION,
PROPERTY DAMAGE, LOSS OF VALUE OF THE
PRODUCT, DEATH, INJURY OR ANY OTHER DAMAGES
THAT MAY BE CAUSED TO YOU, YOUR FAMILY, HEIRS,
ESTATE OR ASSIGNS. NOTWITHSTANDING ANY
DAMAGES THAT YOU MIGHT INCUR FOR ANY REASON
WHATSOEVER (INCLUDING, WITHOUT LIMITATION, ALL
DAMAGES REFERENCED HEREIN) AND ALL DIRECT
OR GENERAL DAMAGES IN CONTRACT, TORT
(INCLUDING NEGLIGENCE AND OTHERWISE), THE
ENTIRE LIABILITY OF THE COMPANY SHALL BE
LIMITED TO THE AMOUNT ACTUALLY PAID BY YOU
FOR THE PRODUCT. SOME STATES DO NOT ALLOW
THE EXCLUSION OR LIMITATION OF INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE
LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO
YOU.
9.2 Exclusions and Limitations
Company’s Limited Warranty applies only to the
Product. The warranty does not apply to any non-Company
products, even if packaged or sold with the Product. This
warranty does not apply to damage caused by abuse,
misuse, accident, tampering, force majeure, or modifications
of the Product.
9.3 Remedy
Your sole and exclusive remedy for a breach of this
Limited Warranty, and Company’s sole and entire liability is,
at Company’s discretion, to repair or replace the defective
Product or refund the purchase price of the defective
Product within thirty (30) calendar days of the date of
purchase. Repair or replacement (including part and labor)
shall be made at Company’s expenses. Company reserves
the right to send you a replacement product that is the
same or an equivalent substitute. Replacement products will
be furnished only on an exchange basis. Replacement
products are warranted as above for the reminder of the
original applicable Product warranty period.
9.4 Warranty Disclaimer
EXCEPT AS SET FORTH ABOVE IN THIS LIMITED
WARRANTY, THE PRODUCT IS PROVIDED ON AN “AS
IS” BASIS AND THE COMPANY MAKES NO OTHER
EXPRESS OR IMPLIED WARRANTIES TO THE EXTENT
PERMITTED BY LAW AND SPECIFICALLY DISCLAIMS
AND EXCLUDES ALL IMPLIED WARRANTIES,
INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. IF SUCH DISCLAIMER
OF ANY IMPLIED WARRANTY IS NOT PERMITTED BY
LAW, THE DURATION OF ANY SUCH IMPLIED
WARRANTIES IS LIMITED TO THE DURATIONS SET
FORTH IN THIS LIMITED WARRANTY. SOME
JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF
IMPLIED WARRANTIES OR LIMITATIONS ON HOW
LONG AN IMPLIED WARRANTY MAY LAST, SO SUCH
LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO
YOU.

Nitroxbuddy2 User Manual – Rev. 20170512 ©2017 DiveNav, Inc. – www.divenav.com Page 7
9.5 Obtaining Warranty Service
If you whish to make a claim under this warranty with
respect to the Product, you can do that either by using our
website or by sending an e-mail to
[e-mail] with the following
information:
1) Attach photocopy of original purchase receipt.
2) Provide purchase date, product UPC code, and serial
number.
3) Write brief description of the problem.
4) Provide a telephone number and e-mail address at
which you can be reached during normal business hours.
All of the above information is required before a
warranty claim will be accepted. Once Company validates
your claim, we will issue you an RMA (Return Material
Authorization) number and shipping information.
10 FCC
10.1 FCC Compliance Statement
FCC ID: RSY2015COOTWO
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.
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 off 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
different from that to which the receiver is connected.
* Consult the dealer or an experienced radio/TV
technician for help.
10.1 FCC Caution
The user is cautioned that changes and modifications
made to the equipment without the approval of
manufacturer could void the user’s authority to operate this
equipment.
11 COPYRIGHT NOTICE
This manual is copyrighted and it may not be copied,
reproduced, translated or transformed into any electronic
format without prior written consent of DiveNav, Inc.