UWT AV1 User manual

AV1
dive computer
MANUAL
(revision 8/2015)
2015

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CONTENTS
WARNING............................................................................................................................................................................. 4
1. AV1 DIVE COMPUTER GENERAL DESCRIPTION............................................................................................. 5
2. MAIN PARAMETERS AND DISPLAY FUNCTIONS ................................................................................................ 6
2.1 CONTROL BUTTONS ...................................................................................................................................................................... 6
2.2 POWER SUPPLY ............................................................................................................................................................................. 6
2.3 UNITS OF MEASUREMENT ............................................................................................................................................................ 7
3. TURNING ON AND OFF ............................................................................................................................................ 8
4. THE MENU ....................................................................................................................................................................... 8
Turn OFF....................................................................................................................................................................................................8
->Switch SP ...............................................................................................................................................................................................9
->Dive setup -> ........................................................................................................................................................................................9
->Select mix............................................................................................................................................................................................13
->SwitchOC/CCR..................................................................................................................................................................................14
>Сheck PO2 Cells->.............................................................................................................................................................................14
->Diveplan..............................................................................................................................................................................................17
->Logbook...............................................................................................................................................................................................18
->Plan dive .............................................................................................................................................................................................18
->Backlight.............................................................................................................................................................................................18
->Switch screen....................................................................................................................................................................................20
->DiveSimulator ..................................................................................................................................................................................20
->Play game...........................................................................................................................................................................................20
->CellsControl .......................................................................................................................................................................................20
->Calibrate O2.......................................................................................................................................................................................21
5. MAIN OPERATION MODES...................................................................................................................................... 21
5.1 SURFACE INTERVAL MODE ....................................................................................................................................................... 22
5.2 DIVE MODE .................................................................................................................................................................................. 23
5.3 GAUGE MODE .............................................................................................................................................................................. 25
5.3.1 Gauge mode Turning On/Off..............................................................................................................................................26
5.3.2 Average Depth calculation and Dive Segment Time...............................................................................................26
5.4 RECREATIONAL MODE ............................................................................................................................................................... 27
5.5 DIVE SIMULATOR MODE............................................................................................................................................................ 29
5.6 BUILT-IN DIVE PLANNER.......................................................................................................................................................... 29
5.7 PO2CELLS CONTROL MODE ..................................................................................................................................................... 30
5.7.1 Pinout Scheme...........................................................................................................................................................................31
5.7.2 РО2Calculation.........................................................................................................................................................................32
5.7.3 Alarm Warnings.......................................................................................................................................................................32
5.7.4 PO2 Control Mode Turning On ..........................................................................................................................................33
5.7.5 Oxygen cells Calibration.......................................................................................................................................................34
6. ECCR CONTROLLER................................................................................................................................................... 35
6.1 ECCR AV1 CONTROLLER FUNCTIONS.................................................................................................................................... 35
6.2 POWER SUPPLY SYSTEM............................................................................................................................................................ 36
6.3 HUD ............................................................................................................................................................................................. 36
7. BUILT-IN COMPASS................................................................................................................................................... 37
7.1 CALIBRATION.............................................................................................................................................................................. 38

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7.2 DIRECTION FIXATION MARKING ............................................................................................................................................. 38
8. AV1 MANAGER MODE .............................................................................................................................................. 38
9. GAME.............................................................................................................................................................................. 40
10. TECHNICAL CHARACTERISTICS AND SERVICE CONDITIONS................................................................... 40
11. AV1 SERVICING ........................................................................................................................................................ 41
12. WARRANTY............................................................................................................................................................... 41

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WARNING
Decompression meter firmfare calculates theoretical tissue saturation with inert gases based
on a mathematical model. This model was made thanks to a variety of experimental data with
the latest decompression theory developments. Nevetherless, using the dive computer, as
well as decompression tables cannot guarantee complete protection against
Decompression Decease (DD). Each diver has his own physiology that changes from day
to day. None of mechanisms can foresee response of your body to any dive profile.
Never dive deeper than dive limit set by safe Oxygen Partial
Pressure!
Never breach decompression procedures!
Never dive deeper the limit you are certified to!
Always study local diving conditions and depths where you are
planning to dive!

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1. AV1 DIVE COMPUTER GENERAL DESCRIPTION
AV1 dive computer (further –AV1) shows all important dive parameters and
decompression information on the screen.

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2. MAIN PARAMETERS AND DISPLAY FUNCTIONS
2.1 Control Buttons
Control buttones allow to choose display functions and access the required specific
information. They are also used to enter display settings.
Two piezoceramic buttons are used to manage AV1 modes and settings. The buttons are
located on both (left and right) sides of the computer. Both sequential and simultaneous
pressing of the buttons are used. Current buttons’ settings are displayed as context-sensitive
hint in the bottom bar of the screen.
Symbol >xxxx< in the middle of the bottom bar means «simultaneous pressing of 2 buttons».
When you are in any MENU item in Surface mode and don’t press any buttons for more than
60 seconds, the computer will leave the MENU item to the Main screen. In Dive mode
buttons’ timeout will take 15 seconds. The only exclusion is Dive Planner mode when
automatic switching to the Main screen will happen in 5 minutes.
In Surface mode buttons are set to maximum sensitivity. You can set AV1 in such a way that
AV1 could automatically decrease buttons’ sensitivity in Dive mode in order to avoid
occasional buttons’ pressing. Sensitivity range is 0… -14. Do not set buttons’ sensitivity too
low. It can complicate managing AV1 in Dive mode. Range -5 … -7 would be a good
compromise for the majority of cases. You can test buttons’ operation in the Simulator mode.
2.2 Power Supply
Li-Ion accumulator battery is used in AV1. Accumulator charging is automatic when the
computer is linked to any device with power supply more than 500mA via USB port.
Green-color indicator will flash when you switch on the computer. The charging process will
be marked with a red-color indicator. When charging is finished, the red-color indicator will
disappear. It's recommended to leave AV1 connected to a power supply source for 30
minutes after charging process is finished (when the red indicator disappears). Battery
charging will be better.
Dive computer re-charging can be done at any level of accumulator charging –it does not
affect the accumulator capacity.

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Time of AV1 independent work depends on the preset screen brightness. Work time will
decrease with higher screen brightness. Screen brightness will be decreased to 30% level
when battery level goes down to 20%.
If the battery is discharged lower than recommended, AV1 will automatically turn off. You will
be able to turn the AV1 on only upon battery charging. Information in the logbook will not be
lost.
Operation time with fully charged battery is about 10 hours.
If you don't use AV1 for a long time, charge it at least once in 2 (two) months. It will prolong
battery life.
Don’t take too much effort when screwing the cap!
The cap is screwed until the tight contact between external O-ring of the cap and the device
body.
Every time ensure that USB-port slot is clean and undamaged. Lubricate O-rings and thread
with silicone grease when required.
2.3 Units of measurement
Both Metric and Imperial units of measurements are used in the decompression meter
(meters and Celsius degrees or feet and Farenheit degrees).
With full battery discharge all the information
(current settings, current tissue saturation) will be lost!
Try not to use AV1 at low temperatures (minus zero C) and keep it in a warm place
right up to the dive.
Try to charge AV1 beforehand –before «lo bat» indicator appears on the screen.
Don’t forget to screw the AV1 USB-port cap tightly upon battery charging!
DO NOT START YOUR DIVE if lo bat indicator is on!

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You can switch between units of measurement in the Menu via ->Display mode (see
Chapter 4 “The Menu”, subparagraph «System Setup», page 16).
Date format is displayed as follows:
- in Metric units: dd-mm-yy;
- in Imperial units: mm-dd-yy.
3. TURNING ON AND OFF
To turn the dive computer on from the Sleep mode press, firstly, the left button, then right
away –the right one.
AV1 will switch from Surface mode to the Sleep mode upon the end of time-out period,
provided no buttons were pushed during this period.
You can set up time to automatic switch to Sleep mode by yourself: see setup procedure in
Chapter 4 «The Menu», subparagraph >SystemSetup->TimeToSleep (page 17).
The device can be switched into the Sleep mode forcefully by selecting TurnOff Menu. You
can switch to TurnOff menu from the Main menu in a Surface mode by pressing both buttons.
In the Sleep mode AV1 keeps continuously recalculating the current tissues' saturation and
CNS level taking into account your surface interval.
AV1 will automatically switch to Dive mode within 10 seconds of 2 meters' submerging.
AV1 will also automatically switch from Dive mode to Surface mode, if the depth is less than
1(one) meter within 2 minutes.
ATTENTION! Two dives with surface time between these 2 (two) dives less than 2
minutes will be recorded as 1 (one) dive.
4. THE MENU
Description and function of the main menu items:
Turn OFF
(only in Surface mode) switching to the Sleep mode.
This menu item is also accessible by simultaneous pressing both buttons in the Main Menu
Screen.

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->Switch SP
(only in CCR mode)
manual switching between Low, High and Deco Setpoints. Choose the required Setpoint with
button Next and confirm with button ОК.
->Dive setup ->
Entry to the submenu of dive mode settings
->Edit mix
Gas list editing. Here you can add gases into active gases' list which will be available
in Select mix menu item. You can also edit MOD field.
Navigating between fields is made with button, changing the field value is made
with + button. MOD field value is taken into account when best mix is offered at the
moment of gas change via ->selectmix menu item, and when TTS value calculation
and when planning your dive.
Each gas in the list may have the status of "non active", "for open cycle", "for the
closed circuit" and "open and closed circuit". This is taken into account when planning
and decompression when entering the list of gases while switching gases.

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Accordingly, you can now set you diluent in CCR mode as active CCR gas, as well as
all bailout gases as OC ones. In this case, decompression and TTS in CCR mode
shall be calculated based on diluent, and in the case of switch to OC automatically
calculated based on OC gases and will offer the gas from the list of OC gases.
РО2field is for reference only and non-editible. It automatically indicates РО2at MOD
depth with preset oxygen fraction. It will be offered to save results of editing upon
navigating through all the editible fields.
->Gas Control
Mode is fairly universal. Allows to predict gas consumption during the main or
emergency plan in real time - both in OC mode as well as when changing from CCR to
bailout. Before diving, you must set the parameters of the emergency plan:

additional bottom time (will be added to the current bottom time);
additional level of average depth and the time at this level.
As a rule, the emergency plan is sufficient to indicate to the bottom + 1-2 min. time. In
the current CCR mode emergency plan will be calculated as an immediate change
from CCR to the OC and switching to the list of gases with the status of "OC" or "OC +