Knowledgebase : Dive Computer > Matrix

Rechargeable batteries that are left unused over long periods of time can reach a status of severe discharge. This in turn can lead to a reduction in performance, both in that they may charge with difficulty and also that they won’t charge to full capacity.

To prevent this, the user should:

  • Charge the computer completely before putting it away
  • Charge it once a month even if it is not being used
  • Store the computer at temperatures above 15°C/60°F
  • If the storage period is planned to exceed three months, we suggest to charge the computer completely and then to remove the battery. Note. This should be performed at an authorized Mares Lab service center ( )

Charging procedure

When charging the computer after a long period of storage, the computer may not show a sign of life for up to 20 minutes after being connected to a charger. It could be beneficial to clean the contacts before starting the process (for instance by putting a few drops of vinegar onto the contacts, let the vinegar sit for a few minutes, then rinse it off with fresh water and maybe use a needle or a small drill bit to gently scrape off any dirt from the surface of the contacts). If after an hour of connection the computer is still not showing any signs of life, try the following:

  • Connect and disconnect the charging clip several times
  • If the USB cable was connected to a wall adapter, switch it to a USB port on a PC
  • If available, try a different USB cable

If after these attempts the computer still refuses to charge, it may be necessary to change either the interface clip or the battery. Please refer to your authorized Mares Lab service center.

The calculation of the average depth for a dive as reported in the logbook of Matrix contains an error in that the 3 minutes of the surface countdown are also considered. Hence the value shown in the logbook will always be a bit lower than the actual value, which is that which can be seen just prior to surfacing. This error is then repeated in Dive Organizer, whereas DiversDiary is showing the correct value because it is calculated on the fly (whereas Dive Organizer takes the data transmitted during the download of the logbook). This will be fixed in the next release, due before the end of 2012. NOTE: The average depth as shown during the dive is correct.

  • You will first need to download Dive Organizer to your PC (take a look at the official Mares website).

  • After the DO program has been downloaded and opened you will need to connect the charged Icon / Matrix (your Icon must be charged by at least 25% to communicate with the PC) to your PC via the supplied USB cable and interface clip.

  • To verify that a secure connection has been established, the Icon HD screen should display a USB symbol on its screen, above the battery percentage; the Matrix should display a 'Connection message' and a blinking battery symbol.

  • This confirms a secure connection and that data can be transferred between the PC and the DO program.

  • Once connected, simply select the 'Computer' tab at the top of the DO program. This specific 'Computer' tab is next to the 'Database' tab.

  • At this point, if everything is connected, the drop down menu from the 'Computer' tab should have all options highlighted in black which you will be able to select.

  • In this particular case you should select 'ICE', 'In Case of Emergency'.

  • Next a pop up will appear where you can input your information. Please remember you are limited to a number of characters.

Yes. Though the Mares USB interface for Drak, Iris, Matrix, Puck Pro, Smart and Nemo Wide (i.e. Silicon Labs CP210x), is not 100% compliant to the USB 3.0 standard, it can be used to communicate with a PC on a USB 3.0 port as well as on USB 2.0 and even 1.1 port, both to download the logbook and to upload firmware or ICE data when possible.

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