21Calibrating the Touchscreen:If the touchscreen seems unresponsive or poorly aligned, it may benefit to re-calibrate thedisplay. The touchscreen display can be re-calibrated one of two ways: through the generalsettings menu or interaction with the power button. To calibrate the display through the generalsettings menu, navigate to the general settings menu and tap the “Calibrate Display” button.Follow the onscreen prompts to power the device off and on. When the device has been poweredon it will prompt calibration. Tap the three flashing dots as they appear on the screen.To calibrate the display through interaction with the power button, when the device is poweredon, press the power button three times in quick succession (this should power the device off).Power the device back on and it will prompt calibration. As before, tap the three flashing dots asthey appear on the screen. When the calibration is complete the device will startup normally.NOTE: Once the calibration has been prompted, you cannot return. The display must be re-calibrated to continue normal operation. Using a fine tipped stylus can help to increase theaccuracy of the calibration.Refrigerant Settings MenuThe refrigerant settings menu, shown in Figure31, can be accessed either by tapping on the“Change Refrigerant” button in the generalsettings menu or by tapping the button in thebottom right corner of any modes screen labeledwith the currently selected refrigerant. To changecurrently selected refrigerant, tap and drag theslider bar to the page containing the desiredrefrigerant. Tap the name of the new refrigerantselection, the device will automatically return tothe previous screen with the new selection saved as the current refrigerant. The currentlyselected refrigerant is always displayed in the box to the right of the change refrigerant buttonin general settings or as the refrigerant button label on any modes screen. To exit the refrigerantmenu without saving a new selection tap the back button in the upper right corner.Unit Settings MenuThe unit settings menu, shown in Figure 32, canbe used to quickly change currently selectedunits. This menu can be accessed by eithertapping the “Change Units” button in the generalsettings menu or by tapping the button in thebottom left corner of any modes screen labeledwith the currently selected unit. To select a newpressure, vacuum, or temperature unit, tap thedesired unit within the corresponding list. OnceFigure 31: Refrigerant Settings MenuFigure 32: Unit Settings Menu