50Model, serial number and operative systemTo navigate the menu follow the instructions in the picture on the left.In this page you can visualize: Model name, serial number (S/N) and the installedoperative system version (OS).In case you need assistance for your RATIO iX3M these data are important.SWITCH OFF (Manual switching off)The RATIO iX3M switches off automatically after a certain inactivity period..However, you can also switch the device off manually.If the device is in charge, the command will be executed only once the charge isfinished.If the device is still carrying out the tissue desaturation after a dive, the command“switch off “ deactivates all systems which are not essential.Nevertheless, the device goes on to carry out the desaturation calculation.INFORATIOIX3M XXXXS/N:00000FW: OS 4.X.X/0XXAExIT