Mares Puck Pro / Puck Pro+ setup guide

Also covers: Puck Pro+, Puck Pro Plus

Wrist dive computer with a single button (Mares RGBM). Air, Nitrox (2 gases) and bottom timer modes; manual altitude setting; user-replaceable CR2450 battery.

Buttons

Button	Where	What it does
`Button`	the single button on the case	Short press: next menu / change value / alternate dive info. Press and hold: enter or confirm; backlight (from the pre-dive screen and during the dive).

Turn on / wake

One button only: press = scroll or change a value; press and hold = enter or confirm.

Press the button to switch it on. The Puck Pro always starts in pre-dive mode, ready to dive.
PressButton
Manual p. 6
In pre-dive it starts logging the moment you pass 1.2 m / 4 ft. If you get in without switching it on, it starts up to 20 seconds late.
Manual p. 6
From pre-dive, it switches itself off after 10 minutes without a button press. From other screens it sleeps after 1 minute.
Manual p. 4
When it seems off, it is only sleeping: it keeps tracking nitrogen and checks the pressure every 20 seconds.
Manual p. 4
To leave a menu, press until bACk appears, then press and hold.
PressButtonHoldButton
Manual p. 4

Date and time

In pre-dive, press until SEt appears, then press and hold to open it.
PressButtonHoldButton
Manual p. 6
Press to scroll to SEt tIME, then press and hold. 24h or ampm starts to blink.
PressButtonHoldButton
Manual p. 8
Press to switch between 24h and ampm, then press and hold to confirm.
PressButtonHoldButton
Manual p. 8
Set the hour, then the minutes, then the date in the same way: press to change, press and hold to confirm.
PressButtonHoldButton
Manual p. 8

Units (m/ft, °C/°F)

In pre-dive, press the button until SEt appears, then press and hold to open it.
PressButtonHoldButton
Manual p. 6
With SEt dIVE shown, press and hold to open it.
HoldButton
Manual p. 6
Press to scroll to UN:tS, then press and hold to open it.
PressButtonHoldButton
Manual p. 7
Press to choose metric (m, °C) or imperial (ft, °F), then press and hold to confirm. Depth and temperature change together.
PressButtonHoldButton
Manual p. 7

Water type (salt/fresh)

In pre-dive, press the button until SEt appears, then press and hold to open it.
PressButtonHoldButton
Manual p. 6
With SEt dIVE shown, press and hold to open it.
HoldButton
Manual p. 6
Press to scroll to WAtR, then press and hold to open it.
PressButtonHoldButton
Manual p. 7
Press to choose SALt (sea) or FRESH (lake), then press and hold to confirm.
PressButtonHoldButton
Manual p. 7
A small S or F on the pre-dive screen shows the water type. A wrong setting changes the shown depth by about 3%, not the decompression calculation.
Manual p. 6

Dive mode (Air / Nitrox / Gauge)

In pre-dive, press until MOdE appears, then press and hold to open it.
PressButtonHoldButton
Manual p. 6
Press to scroll AIR, EAN (nitrox) and bottom timer, then press and hold to choose one. AIR is the same as 21% with a 1.4 bar limit.
PressButtonHoldButton
Manual p. 6
Bottom timer shows only depth, time and temperature. There is no decompression calculation and no alarms except low battery.
Manual p. 12
You can only choose bottom timer when the computer is fully desaturated (no nitrogen left from earlier dives).
Manual p. 12
After a dive in bottom timer mode, wait at least 24 hours before diving with a decompression computer.
Manual p. 12
After an uncontrolled ascent or a missed deco stop, Air and Nitrox are blocked for 24 hours; only bottom timer works.
Manual p. 12

Nitrox O₂% and ppO₂ limit

The manual does not describe any automatic reset of O2% to 21%: the setting stays until you change it.

Open MOdE, press to EAN, then press and hold to choose it.
PressButtonHoldButton
Manual p. 6
Press to change the oxygen % (O2%). Watch the maximum operating depth (MOD) change with it.
PressButton
Manual p. 6
Press and hold to move to ppO2max, then press to change it (1.2 to 1.6 bar; factory setting 1.4 bar).
HoldButtonPressButton
Manual p. 9
Press and hold to save.
HoldButton
Manual p. 6
To exit, press until bACk appears, then press and hold. (Pressing on bACk instead leads to G2, the second gas.)
PressButtonHoldButton
Manual p. 11
Before every dive and after changing tanks, check that the O2% matches the analysed tank.
Manual p. 6

Conservatism / personal setting

A higher P means a more conservative calculation (more safety margin). The manual suggests it, for example, after a long break or for a hard dive. The dive planner uses the chosen P factor.

In pre-dive, press the button until SEt appears, then press and hold to open it.
PressButtonHoldButton
Manual p. 6
With SEt dIVE shown, press and hold to open it.
HoldButton
Manual p. 6
Press to scroll to P FCt, then press and hold to open it.
PressButtonHoldButton
Manual p. 7
Press to choose P0 (standard), P1 (more conservative) or P2 (most conservative), then press and hold to confirm.
PressButtonHoldButton
Manual p. 7
The pre-dive screen shows p+ for P1 and p++ for P2. Nothing is shown for P0.
Manual p. 7

Altitude

Altitude is set by hand. Set it before diving in a mountain lake. Above 3700 m / 12100 ft use bottom timer and altitude tables (p. 7).

In pre-dive, press the button until SEt appears, then press and hold to open it.
PressButtonHoldButton
Manual p. 6
With SEt dIVE shown, press and hold to open it.
HoldButton
Manual p. 6
Press to scroll to ALt, then press and hold to open it.
PressButtonHoldButton
Manual p. 7
Press to choose A0 (sea level to about 700 m / 2300 ft), A1 (to 1500 m / 4900 ft), A2 (to 2400 m / 7900 ft) or A3 (to 3700 m / 12100 ft).
PressButton
Manual p. 7
Press and hold to confirm. A mountain symbol with 1–3 segments shows A1–A3. No symbol means A0.
HoldButton
Manual p. 7

Audible alarms (depth / time)

This manual describes no user-set maximum-depth or dive-time alarm; ALRM only switches all audible alarms on or off.

In pre-dive, press the button until SEt appears, then press and hold to open it.
PressButtonHoldButton
Manual p. 6
With SEt dIVE shown, press and hold to open it.
HoldButton
Manual p. 6
Press to scroll to ALRM, then press and hold to open it.
PressButtonHoldButton
Manual p. 7
Press to choose on or off, then press and hold to confirm. Keep the sound on.
PressButtonHoldButton
Manual p. 8
Built-in alarms (no setup): ascent rate, MOD/ppO2, CNS, missed deco stop and low battery.
Manual p. 9

Reading the log after a dive

In pre-dive, press until LOG appears, then press and hold.
PressButtonHoldButton
Manual p. 6
The first page sums up all dives: deepest depth, number of dives, hours underwater and coldest water.
Manual p. 8
Press to scroll through the dives. Press and hold to open one.
PressButtonHoldButton
Manual p. 8
Each dive has 3 pages (depth, start time, date, O2%, dive time, temperature, surface interval, CNS). Press to change page.
PressButton
Manual p. 8
Press and hold to go back. To leave, press until bACk appears (every 5 dives), then press and hold.
HoldButtonPressButtonHoldButton
Manual p. 8

Battery

No battery symbol on the pre-dive or dive screen means there is enough charge to dive.
Manual p. 4
A steady battery symbol means a few dives are left. Replace the battery soon.
Manual p. 4
A blinking battery symbol means the battery is too weak. Do not dive: it will not work as a dive computer.
Manual p. 4
INFO shows the battery as a number: 3 is best, 2 equals the steady symbol, 1 equals blinking (no diving).
PressButtonHoldButton
Manual p. 8
It uses a user-replaceable CR2450 battery; Mares suggests having it changed at an authorised Mares centre.
Manual p. 12

What the main screen shows

Pre-dive screen: P factor, altitude, time of day, surface interval and temperature; with nitrox also O2% and MOD.
Manual p. 6
During the dive: current depth, max depth, NO DECO time, dive time, temperature and a nitrogen bar graph.
Manual p. 10
In a deco dive, the NO DECO time is replaced by the deepest stop depth and time and the total ascent time (ASC).
Manual p. 10
Nitrogen bar graph at the bottom: the more black segments, the closer you are to the no-deco limit.
Manual p. 10
Press the button to see average depth, O2% and CNS (nitrox only), and the time of day (for 4 seconds).
PressButton
Manual p. 10
Ascent speed shows at the far left of the middle row. At 10 m/min / 30 ft/min or faster an alarm sounds; slow down.
Manual p. 9
Between 6 m / 20 ft and 3 m / 10 ft a countdown shows the 3-minute safety stop.
Manual p. 10
Press and hold the button for the backlight.
HoldButton
Manual p. 4

Pre-dive check

Tick each item before you get in the water.

No blinking battery symbol on the pre-dive screen.
Mode is AIR or EAN as planned, not bottom timer.
If EAN: O2% matches the analysed tank and ppO2max is 1.4 bar (or as instructed).
P factor (p+/p++) is as your instructor wants.
Altitude symbol matches the dive site (none = A0 sea level).
S or F on the pre-dive screen matches salt or fresh water.
Audible alarms (ALRM) are on.
Puck Pro is in pre-dive before you get in the water.