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Always use the point of the stylus for tapping or making strokes on the display. Never use an actual pen, pencil, sharp or
abrasive object to write on the touch screen.
An extra or replacement stylus may be ordered.
A replaceable touch screen protective film is available when the Thor VM1 is used in an abrasive environment. Contact
Technical Assistance (page 11-1) for availability.
Note: If the touch screen is disabled or looses calibration on a Thor VM1 with the 12 key keypad, you must use a
USB mouse or keyboard attached to the Thor VM1 to access the control panel to re-enable or recalibrate the touch
screen.
Touch Screen Defroster
Extended temperature versions of the Thor VM1 contain a touch screen defroster. The touch screen defroster can be dis-
abled when not needed via the Peripherals (page 5-82) control panel. The defroster trip point is configurable. The
defroster is always disabled when the device is operating from UPS battery power.
Screen Blanking
Screen blanking (blackout) can be enabled when the vehicle is in motion. See Screen Blanking (page 4-30) for hardware
setup and Screen Control (page 5-88) for software setup to enable screen blanking. Once screen blanking is enabled, the
display is blanked out any time when the cable sends the signal the vehicle is in motion. If the cable is removed, screen
blanking is disabled and the display remains on.
Display Backlight Control
The display brightness on a Thor VM1 equipped with an outdoor display can be configured to automatically adjust depend-
ing on the ambient light level via Screen Control (page 5-88).
Note: When automatic brightness control is enabled, the manual display brightness controls described below have no
effect.
The display brightness can be adjusted manually, via the keypad:
• Use the 2nd + F7 keypress to increase backlight brightness and the 2nd + F8 keypress to decrease backlight brightness.
