Divesoft ODA Manuel utilisateur
USER MANUAL
ODA
ODA USER MANUAL
Author
Jakub Šimánek
Publisher
Divesoft s.r.o. | www.divesoft.com
Issue
Revision 1.0 | 1 May 2021
Use of this manual approved by
Lucie Šmejkalová, CEO
LIBERTY MANUAL
2
WARNING: ODA is an supplemental device. Do not use ODA as the sole source of information
displayed.
WARNING: This device is intended only for thoroughly trained persons with a valid certification
for diving with a Liberty rebreather. Improper use can cause injury or death.
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List of content
ODA Technical specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
What is the ODA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
How to connect ODA and put it in to operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Placement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Focus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Rear diode and luxmeter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
ODA behaviour during the Pre-dive check sequence . . . . . . . . . . . . . . . . . . . . . . 10
How to read the data on the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Compass and its control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Compass calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Presence of strong magnetic fields . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Position of the ODA relative to the diver’s eye . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Azimuth fixation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Survey marks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
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ODA Technical specification
Max depth: 300 m (984 ft)
Diameter: 39,40 mm (1,55 in)
Length: 66,50 mm (2,62 in)
Weight without holder: 150 g (0,33 lb) connector and cable included
Buoyancy: neutral
Connection: HUD/BD connector
Connectivity: Divesoft Liberty 2021 edition
Materials
Body: Delrin
Optics: Sapphire glass with anti-reflex coating
Display resolution: 428 × 240 pixels
Focus: Fully adjustable
Color: black
Package content: Semi hard case, ODA, lens cover, adjustable mount
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What is the ODA
The ODA – Optical Display Adapter is a visual display device that provides divers with important
information about the dive in the diver’s field of view. The purpose of this device is for the diver
to always have dive information available, even when the diver cannot view the information
from the handsets. The ODA maintains the diver’s constant awareness of dive conditions and
notifies the diver of the event of dangerous values impacting diver safety.
Displayed data: ppO2, depth, time, no-decompression time / decompression ceiling, TTS,
setpoint, oxygen sensor deviation, oxygen pressure, and diluent pressure.
ODA can only be used with the Divesoft Liberty platform. It cannot be connected to other
rebreathers or used as a standalone computer.
IMPORTANT: ODA is only compatible with Liberty 2021 Edition and FW 2.13.1 and higher. Make
sure you have the correct FW installed in both the CU and the handset. (This can be found at
the start of the device or in the menu / Setup / System check
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How to connect ODA and put it in to operation
The ODA is equipped with a connector identical to the HUD or Buddy Display connector.
Theoretically, it is possible to connect ODA to the left and right CU, but the cable routing
determines a more advantageous connection to the right CU and the cable routing along the
right corrugated hose.
Before installing the ODA connector to the Liberty head, make sure that there is an O-ring seal
on the connector and that it is well lubricated. Secure the connector in the head with the two
enclosed screws using a 3 mm Allen key.
Wrap the ODA cable around the corrugated hose so that it does not form excess loops and is
not too short that head movements are restricted.
IMPORTANT: ODA must be assigned an indication using a handset. On the handset in the main
menu, select Setup / Preferences / Indication. For Left and Right, Buddy D., HUD, ODA, and None
are selected. Depending on the actual ODA location (left CU, Right CU), select the ODA value for
the item. Without this setting, ODA does not work!
Recommendation: If you use only one handset in conjunction with ODA, have ODA on the
opposite CU than the handset. This allows you to back up the displayed information in the event
of a failure of one of the CUs or batteries.
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Placement
Slide the included ODA holder into the rail on the DSV or BOV of your Liberty. ODA can be
installed on both the left and right eye, which is a matter of personal preference.
Everyone has their dominant eye, which they perceive more naturally. The dominant eye can
be independent of whether you are right-handed or left-handed. If you do not know which is
your dominant eye, try which position of ODA suits you better and you feel more natural and
comfortable when watching it.
If you need to replace the ODA location side, you must unscrew the top hinge securing the ODA
and screw it to the opposite side of the holder’s arm.
If necessary, you can flip the ODA display. Go to Setup / Preferences / Indication / HUD right/
left.
Adjust the position of the ODA so that it is in your field of view and at the same time does not
excessively obstruct the view and does not collide with your diving mask. Pay close attention
to the setting of the ODA angle to your eye. The angle has a major effect on the display of the
entire ODA display.
The distance of the eyepiece from the eye should be approximately 4 cm (about 1 / inch).
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Focus
Rotate the eyepiece adjustment ring so that in the set ODA position, you can see the display
sharply while seeing the surroundings without having to close the opposite eye or refocus
between the display and the surroundings. The screen image should appear as if projected into
the environment. If you are unable to focus on the screen, change the distance of the eyepiece
from the eye and continue focusing.
Although finding the optimal position so that you do not have to refocus may seem difficult at
first, you will learn how to use ODA with your preferences in no time.
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Rear diode and luxmeter
At the back of the ODA there is a diode serving as a buddy display, which indicates to the diving
partner the breathability of the gas in the loop or reports the danger of the diver. At a partial
pressure of <0.2 bar and> 1.6 bar, it illuminates green. In addition to these values, which are
considered breathable, the LED lights up red.
On the back of the ODA there is also a luxmeter used to automatically adjust the brightness of
the display according to the intensity of ambient light. It is not a diode and should not be lit.
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ODA behaviour during the Pre-dive check
sequence
During the pre-dive check procedure, the basic display is constantly displayed, and during the
HUD check you will be prompted to check the ODA screen. When checking the Buddy display,
the corresponding colour of the rear LED lights up according to the colour displayed on the
display. However, the brightness of the diode remains the same and does not change as on the
handset or buddy display.
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