To enter the license key, go to MAIN MENU → Settings → licenses, then press the NEW context button. When in PARAM EDIT section, enter your licence code using the keyboard keys (1-9 and A-F). Press ENTER context button to confirm. The messages ‘Unlocking’ and then ‘Licence added’ are displayed on the screen. Now, the new licence is activated and you can perform measurements of parameters included in this license.