Divesoft DNA 8460 User manual
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#8460 DNA User Manual
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Dear user, thank you for purchasing Divesoft Nitrox Analyzer.
We wish you many safe NITROX dives.
DISCLAIMER
WARNING This analyzer is designed for measuring the content
of oxygen in air or NITROX. It cannot be used to analyze
mixtures containing other gases than oxygen - nitrogen
mixtures. For diving breathing mixtures containing helium use
one of DIVESOFT’s trimix analyzers.
ATTENTION: THE DEVICE IS NOT WATERPROOF. DO NOT EXPOSE
THE ANALYZER TO WATER.
The physical and chemical principles of the sensors used do
not guarantee that the sensors will be selectively sensitive to a
specific gas (oxygen, helium); there are a number of gases to
which the sensors respond. Therefore, the gas composition
shown by the analyzer does not mean by itself that the real
composition of the mix is equal to the displayed values. The
displayed mix composition is invalid unless the mixing
technology ensures that there are no other gases present in
the mix except air/nitrogen, pure oxygen and pure helium.
The analyzer is not a certified measuring instrument. The
results of measuring are only informative and it is not possible
to use such results where a certified measuring instrument is
required.
When analyzing mixes in situations where the incorrect
composition of the mixes could cause material damage, injury
to health or threaten human health or life, for example in the
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case of breathing mixes for diving, the results of the analysis
may not be used as confirmation of the correct mix
composition. In these cases, the analyzer can only be used as
an aid for increasing the probability that such incorrect mix
composition will be detected before its use. The correctness of
the mix composition must be established by the technology
used to prepare it.
The correct preparation of breathing mixes for diving (NITROX
included) requires special knowledge and experience which is
possible to gain, for example, through an appropriate course. A
failure to apply such knowledge can lead to an incorrect mix,
even though the results of the analysis are seemingly correct.
Such a situation can also be the result of a failure to take into
account the influence of temperature and compressibility, an
insufficient blending of the mix and other factors.
Please remember that the analyzer can be broken or damaged
and that the oxygen sensor is by its nature subject to ageing
and thus its properties deteriorate.
Therefore always verify the measured data in another way, such
as by precise preparation of the mix, another analytical
method, etc. In addition, the measured value must be subject
to critical assessment using a common-sense approach and if
it differs from the allowable variation of mixing accuracy, it
must be considered invalid.
Content
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#8460 DNA User Manual
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DISCLAIMER
1. TECHNICAL DATA
2. USE
2.1 Pairing
2.2 Calibration
2.3 Analyzing
3. MAINTENANCE
3.1 Battery Replacement
3.2 Changing the sensor
3.3 Firmware update
3.4 Used sensors and batteries
1. TECHNICAL DATA
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Dimensions: 45,6 × 111 x 40 mm
Weight: 100 g
Weight with DIVESOFT sensor: 126 g
Battery used: CR 2450
Compatible oxygen sensors: R22S, R22D
Measuring range: Total measuring range is up to 300mV, uses
two subranges (up to 150mV and up to 300mV). The switching
is automatic. The polarity of the sensor must be observed.
Accuracy: Oxygen analysis from 1-100% with accuracy of
+/-1%.
2. USE
2.1 Before first use
For battery saving reasons before purchasing the product, the
battery is separate from the analyzer. Before first use, install
the included battery according to section 3.1 Battery
Replacement
2.2 App Download
To use the analyzer, you must download the Divesoft.App. This
app is available for both Android and iOs phone operating
systems. These versions are available here, or directly in the
app stores:
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NOTE: Analyzer feature works in app version 1.7.0 or higher.
2.3 Pairing
1. Launch the app on your mobile phone.
2. Select the ANALYZER tile on the home screen.
3. The app will give you available analyzers nearby. The serial
numbers of the DNA analyzers are displayed. The serial number
can be found on the body of the analyzer under the ring.
4. The app will show you a measurement screen with the
uncalibrated sensor and the sensor voltage value.
Note - the next time you run the app, if the paired DNA analyzer
is in range, the app will display the analyzer measurement
directly.
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2.4 Calibration
Calibration is required before each new use of the analyzer.
Calibration can be to ambient air or to oxygen.
In the case of calibration to air, it must be ensured that the gas
in contact with the sensor is guaranteed to be air. If there is a
risk that the sensor has been purged with a gas other than air,
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draw air from the inlet hole of the analyzer for about 10
seconds.
If calibrating on oxygen, a guaranteed source of pure oxygen is
required. For oxygen calibration, we recommend the use of a
professional DIVESOFT flow limiter with tubing for accurate
and efficient calibration.
1. Select the calibration option using the button at the bottom of
the app screen.
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2. Select the calibration method AIR or OXYGEN.
3. Allow the calibration gas to flow into the analyzer and wait for
the sensor voltage to stabilize.
4. Press CONFIRM.
NOTE: Ensure that the sensor voltage value is within the sensor
manufacturer's parameters when exposed to the gas. DIVESOFT
oxygen sensors have an air voltage range of 7 - 13 mV. It is
advisable to verify that the sensor shows linear measurement
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values When calibrating on oxygen. This can be done by
multiplying the air voltage value by 4.76. The result should
correspond to the voltage value on oxygen.
2.5 Analyzing
Start the application and wait for the DNA analyzer to pair -
display the mixture value and the oxygen sensor voltage. Open
the valve of the cylinder containing the gas to be analyzed so
that only a very gentle stream of gas escapes from the valve.
Place the front of the analyzer against the bottle valve and
press firmly so that all the analyzed gas flows through the
analyzer and no gas leaks past.
Monitor the value in the mobile app. The steady state value can
be considered as the measurement result.
NOTE: For a more accurate and efficient measurement with
minimal loss of measured gas, use the DIVESOFT professional
limiter. The flow limiter tubing fits into the inlet hole in the
front of the restrictor.
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3. MAINTENANCE
3.1 Battery Replacement
The DNA analyzer uses commercially available CR 2450 button
cell batteries.
The battery life in the analyzer is 1 - 2 years. The battery status
is displayed on the application screen when the analyzer is
connected. Replace the battery if the battery capacity is low or
the application cannot find the analyzer at all.
1. Pull the bottom of the analyzer out.
2. Remove the battery - use your fingernail or a flat tool to flip
the metal lever to the side and remove the battery.
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3. Insert the new battery with the narrower side down.
4. The LED will flash 8 times green if the battery has sufficient
capacity. If the battery capacity is low, the LED will flash 8
times in red.
The battery is included in the package.
The battery is not covered by the warranty.
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3.2 Changing the sensor
R22 sensors with molex connector are used in the device. For
the analysis of NITROX mixtures, sensors discarded after 1 year
of use in rebreathers can be used. The sensor should not be
more than 2 years old overall at the time of use in the analyzer
and should produce a voltage within the range specified by the
manufacturer.
1. Pull out the front of the analyzer (Do not use brute force or
violent movement to avoid damage to the cables).
2. Remove the molex connector. To remove the molex connector,
use a fingernail or flat tool to pry the white lever inside the
sensor and gently pull on the connector cables.
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3. Unscrew the sensor from the analyzer.
4. Screw the new sensor into the front of the analyzer.
5. Connect the molex connector. CAUTION: The polarity of the
sensor must be observed!
6. Pressurize the front of the analyzer into the analyzer body.
The sensor is not included in the basic package.
3.3 Firmware update
WARNING: Do not perform a firmware update with a low
battery. Check battery status before updating firmware.
1. Download the new firmware to your smartphone from the
DIVESOFT support site https://www.divesoft.com/en/support
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2. Download the external nRF Device Firmware Update
application and run it.
3. Pull out the bottom of the analyzer.
4. Start the bootloader - Press the button in the hole in the
bottom of the analyzer for 6 sec. To press the button, use, for
example, a SIM card removal tool or a paper clip, etc. If the
bootloader is successfully switched, the LED next to the
battery inside the bottom of the analyzer lights up for 1 sec in
red and then the red and green LEDs flash alternately.
5. In the application, select the downloaded firmware file.
6. Select the DNA analyzer. In the application it is displayed as
DNA-DFU (only if switched to bootloader). The serial number is
not displayed.
7. Press START in the application.
8. After the firmware is loaded, the new firmware will
automatically start.
NOTE: Should an error occur during upload, the device will
remain in bootloader mode and the action can be repeated. In
case of inactivity for 2 minutes, the analyzer will switch back to
standard mode.
3.4 Used sensors and batteries
Treat used oxygen sensors as hazardous waste. Use collection
points or containers designed for the collection of used
batteries.
Dispose of used batteries in designated collection containers
or take them to a collection point.
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#8460 DNA User Manual
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ANALYZER DNA - USER MANUAL
Date of issue: 11 November 2023
HW 1.0, FW 2.4.0
Authors: Jakub Šimánek
Published by Divesoft s. r. o.
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