Aqualung i470TC setup guide

Also covers: Aqua Lung i470TC, i470TC

Four-button watch-style computer (UP, DOWN, SELECT, LIGHT) with optional wireless tank-pressure transmitters (up to 3) and Gas Time Remaining. Watch, Dive (Air/Nitrox, up to 3 gases), Gauge and Free modes; hold UP or DOWN on the Watch screen to switch to the dive computer. User-replaceable CR2430 battery.

Buttons

Button	Where	What it does
`UP (▲)`	left side, upper	Move up / increase or toggle a value / ALT screens; hold: switch Watch ↔ dive mode, fast scroll
`DOWN (▼)`	left side, lower	Move down / decrease or toggle / open the menu; hold: switch Watch ↔ dive mode, exit to Main
`SELECT`	right side, upper	Select / save, open a menu, Last Dive screens, silence an alarm; hold: step back or exit
`LIGHT`	right side, lower	Backlight

Turn on / wake

A new unit is shipped in Deep Sleep. Hold SELECT and DOWN together for 3 seconds until the Watch screen appears, then let go.
Hold togetherSELECTHold togetherDOWN (▼)
Manual p. 8
Normally the Watch screen is shown. Hold UP or DOWN on the Watch screen to switch to the dive computer mode.
HoldUP (▲)HoldDOWN (▼)
Manual p. 14
In the dive mode, press DOWN to open the menu (PLAN, LOG, SET MENU, DC INFO, BAT-TMT, DONE). Move with UP or DOWN; press SELECT to open.
PressDOWN (▼)PressUP (▲)PressSELECT
Manual p. 30
To step back or leave a menu, hold SELECT. Hold DOWN to go straight back to the Main screen.
HoldSELECTHoldDOWN (▼)
Manual p. 11
After 10 minutes on the surface without a button press, it goes to Standby to save power. Press a button to wake it.
Manual p. 8

Date and time

The clock and date are set in Watch mode, not in the dive menu (p. 17).

On the Watch screen, press DOWN to open the Watch menu. Press DOWN until SET TIME appears, then press SELECT.
PressDOWN (▼)PressSELECT
Manual p. 14
Date format: press UP or DOWN for M-D or D-M, then SELECT. Hour format: choose 12 or 24, then SELECT.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 18
Default Time (HOME or AWAY) and the time-zone difference come next. Press SELECT to keep them.
PressSELECT
Manual p. 19
Time of day: set the hours with UP or DOWN and press SELECT, then do the same for minutes.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 19
Date: set the year, month and day in turn with UP or DOWN, pressing SELECT after each.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 19
Dual Time: choose ON or OFF with UP or DOWN, then SELECT.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 20

Units (m/ft, °C/°F)

One setting (MET or IMP) changes all units together (p. 39).

In the dive mode, press DOWN to open the menu, press DOWN to SET MENU, then press SELECT.
PressDOWN (▼)PressSELECT
Manual p. 34
Press UP or DOWN to Set Utilities, then press SELECT.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 38
Press SELECT to go past H2O Type and H2O Activation to UNITS.
PressSELECT
Manual p. 39
Press UP or DOWN to choose MET or IMP, then press SELECT to save.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 39

Water type (salt/fresh)

In the dive mode, press DOWN to open the menu, press DOWN to SET MENU, then press SELECT.
PressDOWN (▼)PressSELECT
Manual p. 34
Press UP or DOWN to Set Utilities, then press SELECT. H2O Type is the first item.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 38
Press UP or DOWN to choose SALt or FrESH, then press SELECT to save.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 39

Dive mode (Air / Nitrox / Gauge)

Open SET MENU (press DOWN, DOWN, then SELECT). Press UP or DOWN to Set Mode, then press SELECT.
PressDOWN (▼)PressUP (▲)PressSELECT
Manual p. 42
Press UP or DOWN to choose dIVE (air/nitrox computer), GAUGE (depth and timer) or FrEE (free diving). Press SELECT to save.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 42
Warning: after a Gauge dive it has no deco or oxygen calculation until a 24-hour surface interval has passed. Do not choose GAUGE unless your instructor says so.
Manual p. 42

Nitrox O₂% and ppO₂ limit

The manual describes no automatic reset of the O2 %. After a dive, the active gas returns to Gas 1 after 10 minutes on the surface (p. 51).

Open SET MENU (press DOWN, DOWN, then SELECT). Press UP or DOWN to Set Gas, then press SELECT.
PressDOWN (▼)PressUP (▲)PressSELECT
Manual p. 35
Press UP or DOWN to choose Air or EAN (nitrox), then press SELECT. If you choose Air, you are done.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 35
Gas 1: press UP or DOWN to set the O2 % (21–100%), then press SELECT.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 35
Set the PO2 alarm with UP or DOWN (1.10–1.60, steps of 0.05; for example 1.40). The MOD is shown. Press SELECT.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 35
Gas 2: set it to OFF for a single tank and press SELECT; this returns you to Set Gas. Gas 1 cannot be turned off.
PressSELECT
Manual p. 35
Check the surface screen: it shows the O2 % and gas number.
Manual p. 30

Conservatism / personal setting

Open SET MENU, press UP or DOWN to Set Utilities, then press SELECT.
PressDOWN (▼)PressUP (▲)PressSELECT
Manual p. 38
Press SELECT to go past each item until CONSERVATIVE FACTOR appears (the 6th item).
PressSELECT
Manual p. 40
Press UP or DOWN to choose ON or OFF, then press SELECT to save.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 40
ON gives shorter no-deco times: it calculates as if you were 915 m (3,000 ft) higher than you are.
Manual p. 23

Altitude

Altitude is detected automatically; there is no manual altitude setting (p. 74).

Nothing to set: it reads air pressure when the dive mode starts and every 15 minutes while dry.
Manual p. 74
It adjusts by itself for altitudes from 916 m (3,001 ft) to 4,270 m (14,000 ft), and will not work as a dive computer higher than that.
Manual p. 74
To see the altitude level, press UP on the dive surface screen for ALT 1. It shows EL2–EL7, or blank at sea level.
PressUP (▲)
Manual p. 30

Audible alarms (depth / time)

Open SET MENU, press UP or DOWN to Set Alarms, then press SELECT.
PressDOWN (▼)PressUP (▲)PressSELECT
Manual p. 36
Audible alarm: press UP or DOWN for ON or OFF, then SELECT. Leave it ON.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 36
Depth alarm: press UP or DOWN to choose OFF or 10–100 m (30–330 ft), then SELECT.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 36
EDT (dive time) alarm: choose OFF or 10–180 minutes with UP or DOWN, then SELECT.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 37
N2, DTR, TURN pressure (OFF or 70–205 bar / 1000–3000 psi) and PRESS end-pressure (20–105 bar / 300–1500 psi) alarms follow. Set each and press SELECT.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 38
An alarm beeps 10 times and a light flashes. Press SELECT to silence it.
PressSELECT
Manual p. 26

Reading the log after a dive

Quick look: press SELECT on the dive surface screen for LAST DIVE screens.
PressSELECT
Manual p. 30
Full log: press DOWN to open the menu, press DOWN to LOG, then press SELECT.
PressDOWN (▼)PressSELECT
Manual p. 33
Press UP or DOWN to step through dives (number and date). Press SELECT to open one.
PressUP (▲)PressDOWN (▼)PressSELECT
Manual p. 33
Press SELECT for each page: max depth, dive time, start time, altitude, ascent rate, surface interval, lowest temperature; nitrox dives add O2 % and max PO2.
PressSELECT
Manual p. 33
The log keeps the last 24 Dive and Gauge dives. Free dives are not in the log.
Manual p. 33

Battery

To check, open the menu with DOWN, press DOWN to BAT-TMT and press SELECT. It shows the wrist battery, then each active transmitter.
PressDOWN (▼)PressSELECT
Manual p. 45
A flashing bAt message is a warning: it still works but the backlight is off. Change the battery before diving.
Manual p. 24
At alarm level it drops back to Watch time with bAt flashing. Do not dive.
Manual p. 24
It uses one 3 V CR2430 lithium battery. The user can change it, or a dealer can do it with a pressure test.
Manual p. 73

What the main screen shows

On the surface: surface time, O2 % of the gas, gas number and tank pressure from the transmitter.
Manual p. 30
In a dive: depth, max depth, dive time, gas number, tank pressure and Dive Time Remaining (no-deco or O2 minutes, whichever is shorter).
Manual p. 48
The left bar shows ascent rate; it flashes above 9 m (30 ft) per minute. The right bar shows nitrogen loading.
Manual p. 23
Press UP in a dive for ALT 1: Gas Time Remaining (GTR), time and temperature. At 5 minutes GTR it beeps and flashes; start a controlled ascent.
PressUP (▲)
Manual p. 25

Pre-dive check

Tick each item before you get in the water.

The dive computer mode is showing (not Watch) and set to dIVE.
Gas set to Air, or EAN with the O2 % from your analysed tank.
PO2 alarm set as your instructor asks (for example 1.40).
Transmitter paired and tank pressure shows on the surface screen (if used).
Water type (SALt or FrESH) matches the dive site.
Audible alarm is ON.
Conservative Factor set as your instructor wants.
BAT-TMT shows good wrist and transmitter batteries; no bAt message.