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Matrix
Instruction Manual
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Mares Matrix Instruction Manual

Instruction Manual
Matrix Dive Computer
MATRIX Dive Computer
2
• TABLE OF CONTENTS
1 INTRODUCTION 3
1.3.1 CHARGING THE BATTERY 4
1.3.2 CONNECTING MATRIX TO A PC 4
1.4.1 DIGITAL WATCH DISPLAY 7
1.4.2 ANALOG WATCH DISPLAY 7
1.4.3 DIGITAL COMPASS 7
1.4.3.1 SETTING A BEARING 7
2 MENUS, SETTINGS AND FUNCTIONS 8
2.2.1 SET DIVE 9
2.2.1.1 BACKLIGHT 9
2.2.1.2 P FACTOR 9
2.2.1.3 ALTITUDE 9
2.2.1.4 WATER 9
2.2.1.5 UNITS 9
2.2.1.6 FAST ASCENT 9
2.2.1.7 ALARMS 10
2.2.1.8 ERASE DESAT 10
2.2.2 SET WATCH 10
2.2.2.1 TIME 10
2.2.2.2 FORMAT 10
2.2.2.3 DATE 10
2.2.2.4 SECOND TIME 10
2.2.2.5 ALARM 10
2.2.3 SET COMPASS 10
2.2.3.1 DECLINATION 10
2.2.3.2 DIRECTION 10
2.2.3.3 CALIBRATION 10
3 DIVING WITH MATRIX 11
3.2.1 ASCENT RATE 11
3.2.2 MOD/PPO2 12
3.2.3 CNS = 100% 12
3.2.4 MISSED DECOMPRESSION STOP 12
3.2.4.1 MISSED DECO STOP MODE 12
3.2.5 LOW BATTERY 13
3.3.1 ALTERNATE DISPLAYS 14
3.3.1.1 PROFILE VIEW 14
3.3.1.2 COMPASS 14
3.5.1 SETTING MORE THAN ONE GAS 16
3.5.2 SWITCHING GAS 16
3.5.3 SPECIAL SITUATIONS 16
3.5.3.1 SWITCHING BACK TO A GAS MIXTURE WITH LOWER OXYGEN CONCENTRATION 16
3.5.3.2 SUBMERGING BELOW THE MOD AFTER A GAS SWITCH 16
3.6.1 DIVE VIOLATION INDUCED BOTTOM TIMER MODE 17
4 TAKING CARE OF MATRIX 17
4.2.1 REPLACING THE BATTERY IN MATRIX 17
5 DISPOSAL OF THE DEVICE 18
3
• 1 INTRODUCTION
1.1 GLOSSARY
:
Symbolizes dive violation (in dive mode).
:
Symbolizes uncontrolled ascent violation (in post-dive and logbook displays).
:
Symbolizes decompression stop violation (in post-dive and logbook displays).
ASC:
Total ascent time, the time it takes to perform the ascent from your current depth to the surface in a decompression dive, including all decompression stops and assuming an ascent rate of 10m/min or 33ft/min.
AVG: Average depth, calculated from the beginning of the dive.
CNS: Central Nervous System. CNS% is used to quantify toxic effects of oxygen.
DESAT:
Desaturation time. The time needed for the body to eliminate the nitrogen taken up during diving.
Gas switching: The act of changing from one breathing gas to another.
Max depth: Maximum depth attained during the dive.
MOD:
Maximum Operating Depth. This is the depth at which the partial pressure of oxygen (ppO
2
) reaches the maximum allowed level (ppO2max). Diving
deeper than the MOD will expose the diver to unsafe ppO2 levels.
Multigas:
Refers to a dive in which more than one breathing gas is used (air and/or Nitrox).
Nitrox:
A breathing mix made of oxygen and nitrogen, with the oxygen concentration being 22% or higher.
NO
:
Minimum amount of time the diver should wait before taking a plane.
No deco time:
This is the time that you can stay at the current depth and still make a direct ascent to the surface without having to perform mandatory decompression stops.
O
2
: Oxygen.
O
2
%: Oxygen concentration used by the computer in all calculations.
P Factor:
Personalization factors, which allow the user to select between the standard decompression algorithm (P0) and an increasingly more conservative one (P1, P2).
ppO
2
:
Partial pressure of oxygen. This is the pressure of the oxygen in the breathing mix. It is a function of depth and oxygen concentration. A ppO2 higher than 1.6bar is considered dangerous.
ppO
2
max:
The maximum allowed value for ppO2. Together with the oxygen concentration it defines the MOD.
Switch depth:
The depth at which the diver plans to switch to a higher oxygen concentration mix while using the multigas option.
S.I.: Surface interval between dives in the logbook.
SURF:
Real time surface interval in post dive mode, the time that has elapsed since the end of the dive.
MATRIX Dive Computer
4
1.2 OPERATING MODES
The functions of the Matrix computer can be grouped into two categories, each corresponding to a specific mode of operation:
• watch : Matrix is dry on the surface. In this mode you can use it as a normal watch. You can also change settings, review your logbook, use the dive planner, see remaining desaturation after a dive, download to PC and much more;
• dive: Matrix monitors depth, time, temperature and performs all decompression calculations; dive mode itself can be broken down into 4 sub categories:
- pre-dive (Matrix is on the surface but
actively monitoring ambient pressure, so that it can begin to calculate a dive the instant it is submerged below 1.2m/4ft);
- dive
- surfacing (Matrix is on the surface at
the end of a dive; dive time calculation is halted but if the diver submerges within three minutes the dive is resumed including the time spent on the surface; this for instance would allow a diver to surface momentarily to set a bearing towards the boat, then submerge again and swim towards the boat);
- post-dive (after the three minutes of
surfacing mode, Matrix closes the logbook and reverts to a display showing desaturation time, no-fly time and surface interval; this lasts until the desaturation and the no-fly time both have been reduced to zero).
1.3 RECHARGEABLE BATTERY
Matrix uses a lithium-ion polymer rechargeable battery. A full charge allows you to do up to 15 hours of diving, depending on the usage of the backlight and the temperature of the water. When used only as a watch, the battery lasts approximately two weeks. As a rule of thumb, Matrix uses about 5-6% of battery per day as a watch and 4-5% for each hour diving. Diving in cold water, usage of the backlight and of the beeper increases battery consumption.
The display alerts you of the status of the battery. The three possible situations are described as follows:
- Matrix has more than 25% charge left: no warning on the display, you can use Matrix for diving and as a watch;
- Matrix has between 16 and 25% charge left: the display shows a partially empty battery symbol next to a warning sign. This is sufficient for one 60-minute dive but it is best to charge the battery now;
- Matrix has 15% or less charge left: the display shows an empty battery symbol and a “no dive” message at the top. You can use Matrix as a watch but not as a dive computer. If you submerge, Matrix will not activate and will continue to show the time of day.
The exact level of the battery charge can be viewed at the bottom of the display by scrolling through the information using the bottom right button (see section 1.4).
In the event that the charge drops below 25% during a dive, the message LOW BATTERY will appear on the display. When you see this message, you should consider starting the procedure for a safe ascent as there may not be enough charge to continue diving.
WARNIN
G
- Starting a dive with less than 25% charge can cause the computer to fail during the dive. Recharge the battery as soon as you notice this message.
- Check the battery charge before each dive and recharge it if necessary.
- Temperature can noticeably affect battery performance. A low battery warning may appear when diving in cold waters even if you think that the battery should have sufficient charge.
- It is advised that you charge the battery if you intend to dive in cold water.
The rechargeable battery has a life time of approximately 500 charging cycles. Please contact your authorized Mares dealer if you need to replace it.
1.3.1 CHARGING THE BATTERY
The battery takes about 2 hours to charge from completely empty to completely full. To charge the battery, use the special clip and the USB cable, connecting it either directly to a power supply or to the USB port of a PC or Mac. You will see the battery symbol at the bottom of the display, with flashing elements inside, and a number indicative of the charge level (from 0 to 100). When the battery is fully charged, the elements inside the battery stop flashing.
1.3.2 CONNECTING MATRIX TO A PC
To connect Matrix to a PC or Macintosh computer, use the dedicated clip and the USB cable.
5
1.4 BUTTON OPERATION
Matrix has four buttons. These buttons allow you to access menus and change settings while in surface mode. During the dive they switch displays, call up the compass, and allow to display further information on the computer screen. Each button performs a different function when it is pressed and when it is pressed and held for one second.The overall operation follows a very clear logic:
press press and hold
WATCH ICE backlight
DIVE
go to stop summary table
(when applicable)
backlight
press press and hold
WATCH
in digital watch display:
modify bottom row inside menus: scroll down or decrease by 1
go to pre-dive mode
DIVE modify bottom right corner restart stop watch
press press and hold
WATCH
in watch display: switch between digital and analog display inside menus: go back one level
(does not save changes)
in watch display: call up compass inside menus: return to digital watch
display
(does not save changes)
DIVE go to dive profile go to compass
press press and hold
WATCH
in digital watch display: modify top row inside menus: scroll up or increase by 1
in watch display: go to main menu inside menus: enter a submenu or
confirm a setting
DIVE modify top row
- go to gas switch screen
(multigas mode only)
- confirm gas switch
(multigas mode only)
An overview of the button function both in watch mode and during a dive is presented here below.
WATCH MODE
press
press and hold
TIME-OUT 8 sec
WATCH MODE
DIGITAAL HORLOGE
MATRIX Dive Computer
6
MENU MODE
press
press and hold
MENU MODE
Eén niveau omhoog
WIJZIGINGEN NIET OPGESLAGEN
BEVESTIGEN
+ NAAR VOLGENDE REGEL
Naar hoofdscherm
WIJZIGINGEN NIET OPGESLAGEN
DIVE MODE
press
press and hold
TIME-OUT 8 sec
TIME-OUT 8 sec
GEEN DECODUIK
STOPWATCH OPNIEUW STARTE
(mits weergegeven)
DIVE MODE
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