Aqualung i300C setup guide

Also covers: Aqua Lung i300C, i300C

Two-button (ADV, SEL) wrist computer with Dive (Air/Nitrox, up to 3 gases), Gauge and Free modes and Bluetooth. Settings are reached from the surface menu by pressing ADV; altitude is automatic; user-replaceable CR2450 battery.

Buttons

Button	Where	What it does
`ADV`	front, below the display, left	Advance: next menu item / ALT screen, change a value (hold to scroll fast)
`SEL`	front, below the display, right	Select / save and step forward; backlight; silence an alarm (hold to step back)

Turn on / wake

Press and release ADV or SEL to switch it on. It also turns on when its metal contacts get wet, unless H2O ACT is set OFF.
PressADV
Manual p. 7
Wait while it checks the display and battery and zeroes depth. It then shows the Dive surface screen.
Manual p. 7
From the surface screen, press ADV to step through the menu (LOG, SET GAS, SET AL, SET UTIL, SET TIME, SET MODE…). Press SEL to open an item.
PressADVPressSEL
Manual p. 17
To leave any menu and go straight back to the main screen, hold ADV and SEL together.
Hold togetherADVHold togetherSEL
Manual p. 10
There is no off button. After 10 minutes without a button press the screen sleeps; press any button to wake it.
Manual p. 7
It switches itself off after 2 hours unused. After a dive it stays on (asleep) for 24 hours to count down time to fly.
Manual p. 7

Date and time

Press ADV until you see SET TIME, then press SEL.
PressADVPressSEL
Manual p. 28
Date format: press ADV to choose M-D or D-M, then SEL to save.
PressADVPressSEL
Manual p. 28
Hour format: press ADV to choose 12 or 24, then SEL to save.
PressADVPressSEL
Manual p. 28
Time: press ADV to change the hours and SEL to save. Repeat for the minutes.
PressADVPressSEL
Manual p. 29
Date: set the year with ADV and save with SEL, then do the same for month and day.
PressADVPressSEL
Manual p. 29

Units (m/ft, °C/°F)

Press ADV until you see SET UTIL, then press SEL.
PressADVPressSEL
Manual p. 24
Press SEL to save and move past H2O TYPE and H2O ACT until UNITS appears.
PressSEL
Manual p. 25
Press ADV to choose MET (metres, °C) or IMP (feet, °F). Depth and temperature change together.
PressADV
Manual p. 25
Press SEL to save. Hold ADV and SEL together to return to the main screen.
PressSELHold togetherADVHold togetherSEL
Manual p. 10

Water type (salt/fresh)

Press ADV until you see SET UTIL, then press SEL. H2O TYPE is the first setting.
PressADVPressSEL
Manual p. 24
Press ADV to choose SALT or FrESH, then press SEL to save.
PressADVPressSEL
Manual p. 24

Dive mode (Air / Nitrox / Gauge)

Free mode dives are not shown in the Log or History (p. 29).

Press ADV until you see SET MODE, then press SEL.
PressADVPressSEL
Manual p. 29
Press ADV to choose diVE (air/nitrox computer), GAUGE (depth and timer only) or FrEE (free diving).
PressADV
Manual p. 29
Press SEL to save.
PressSEL
Manual p. 29
Warning: after any Gauge dive or violation dive it stays locked in Gauge mode for 24 hours. Do not use Gauge mode on a rental unless your instructor says so.
Manual p. 29

Nitrox O₂% and ppO₂ limit

The manual describes no automatic reset of the O2 % on the surface. After a dive, the active gas goes back to Gas 1 after 10 minutes on the surface (p. 36).

In Dive mode, press ADV until you see SET GAS, then press SEL.
PressADVPressSEL
Manual p. 21
Press ADV to choose Air or EAN (nitrox), then press SEL. If you choose Air, you are done.
PressADVPressSEL
Manual p. 21
Gas 1 FO2: press ADV to set the O2 % (21–100%). Hold ADV to scroll faster. Press SEL to save.
PressADVHoldADVPressSEL
Manual p. 21
Gas 1 PO2 alarm: press ADV to set the PO2 limit (for example 1.4, as your instructor says). The screen also shows the MOD. Press SEL to save.
PressADVPressSEL
Manual p. 21
Gas 2 and Gas 3 screens follow and are set the same way. For a normal one-tank dive leave Gas 2 and 3 OFF; Gas 1 cannot be turned off.
PressADVPressSEL
Manual p. 21, 22, 32
Check the surface screen: it shows the O2 % you set for the gas.
Manual p. 17

Conservatism / personal setting

Press ADV until you see SET UTIL, then press SEL.
PressADVPressSEL
Manual p. 24
Press SEL to save and step past each setting until CF appears (the 6th item).
PressSEL
Manual p. 26
Press ADV to set CF ON or OFF, then press SEL to save.
PressADVPressSEL
Manual p. 26
CF ON gives shorter no-deco times: the computer calculates as if you were 915 m (3,000 ft) higher than you are.
Manual p. 13

Altitude

Altitude is detected automatically; there is no manual altitude setting (p. 61).

Nothing to set. It measures air pressure when switched on and every 15 minutes while dry, and adjusts automatically from 916 m (3,001 ft) up to 4,270 m (14,000 ft).
Manual p. 61
To check the altitude level, press ADV to ALT 2. It shows EL2–EL7, or is blank at sea level.
PressADV
Manual p. 18
Switch it on at the dive site so it reads the local pressure. It will not work as a dive computer above 4,270 m (14,000 ft).
Manual p. 61

Audible alarms (depth / time)

Press ADV until you see SET AL, then press SEL.
PressADVPressSEL
Manual p. 22
AUd AL: press ADV to turn audible alarms ON or OFF, then SEL to save. Leave it ON.
PressADVPressSEL
Manual p. 22
dEPTH AL: press ADV to choose OFF or a depth from 10–100 m (30–330 ft), then SEL to save.
PressADVPressSEL
Manual p. 23
Edt AL (dive time): press ADV to choose OFF or 10–180 minutes, then SEL to save.
PressADVPressSEL
Manual p. 23
N2 AL and dtr AL (dive time remaining, 5–20 min) follow; set them the same way with ADV and save with SEL.
PressADVPressSEL
Manual p. 24
In a dive, an alarm beeps once a second for 10 seconds and a light flashes. Press SEL to silence it.
PressSEL
Manual p. 15

Reading the log after a dive

From the surface screen, press ADV until you see LOG, then press SEL.
PressADVPressSEL
Manual p. 19
The newest dive is shown first with its date and start time. Press ADV for older dives.
PressADV
Manual p. 19
Press SEL to open a dive: max depth, dive time, surface interval, altitude, lowest temperature, max ascent rate.
PressSEL
Manual p. 20
Press SEL again for more pages: average depth, highest PO2, O2 % and end-of-dive O2 saturation (nitrox dives only).
PressSEL
Manual p. 20
The log keeps the last 24 Dive and Gauge dives. Free-mode dives are not in the log.
Manual p. 19

Battery

A solid battery icon is a warning: the computer still works but the backlight and Bluetooth are off. Change the battery before diving.
Manual p. 14
A flashing battery icon is an alarm: the computer shuts off after 5 seconds. Do not dive.
Manual p. 14
It takes one 3 V CR2450 lithium battery that the user can change. Settings and dive data are kept during the change.
Manual p. 59
After a battery change, switch it on and check the self-test and that the display is clear and sharp.
Manual p. 61

What the main screen shows

On the surface it shows the surface time (since switching on or since the last dive) and the O2 % of the gas.
Manual p. 17
In a dive the main screen shows depth, dive time, max depth, gas number and Dive Time Remaining (no-deco minutes or O2 minutes, whichever is shorter).
Manual p. 32
The bar on the left shows ascent rate. If you go up faster than 9 m (30 ft) per minute, it flashes with SLO.
Manual p. 13
The bar on the right shows nitrogen loading. Four segments are caution; five means decompression.
Manual p. 66
Press ADV in a dive to see more: time and temperature, and for nitrox the O2 saturation and PO2.
PressADV
Manual p. 33

Pre-dive check

Tick each item before you get in the water.

Mode is diVE (not GAUGE or FrEE) unless your instructor says otherwise.
SET GAS shows Air, or EAN with the O2 % from your analysed tank.
PO2 alarm set as your instructor asks (for example 1.4).
Water type (SALT or FrESH) matches the dive site.
Units (MET or IMP) are the ones you are used to.
Audible alarms (AUd AL) are ON.
CF is set as your instructor wants.
No battery icon on the display.
Switch it on at the dive site before the dive.