Introduction 1U1461A/U1453A User’s Guide 49Additional FeaturesAutomatic power-offYour tester automatically turns off if the rotary switch is not moved or a key is notpressed for 10 minutes (default). Pressing any key will turn the tester back on afterit is powered off automatically.To change the timer period or completely disable the automatic power-off, referto “Changing the auto power-off (APO) timer” on page 132.OLED Auto Dim functionYour tester’s OLED automatically dims if the rotary switch is not moved or a key isnot pressed for 90 seconds (default). This auto dim behavior is enabled by default.Pressing any key or changing the rotary switch position will cancel this effect andreset the auto dim timer.To disable the auto dim, refer to “Changing the OLED behavior” on page 132.Change the OLED brightnessIf viewing the display becomes difficult in low-light conditions, press tochange the OLED brightness (this option must first be enabled in the Setup, see“Changing the OLED behavior” on page 132 for more information.The LOW, MEDIUM, or HIGH setting must be selected in the tester’s Setup(browse to Menu 3 > BACKLIT) prior to this action. Pressing repeatedly willcycle the OLED brightness from low to medium to high (and back to low again).You are advised to select an suitable brightness level based on your needs toconserve battery life if you wish to control the OLED brightness level manually.NOTE The auto dim function is enabled by default. Refer to “Changing the OLEDbehavior” on page 132 to disable the auto dim function before you can manuallychange the OLED brightness.
