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Menu Screens
System Information
The system information screen displays
the hardware and software information of
the VRVD640G.
Calibration Screen
The calibration screen is used by the sys-
tem to ensure the accuracy of the user’s
touch when using the touch screen.
Follow the on-screen instructions when us-
ing this screen.
UTIL Utility Control Screen
The Utility screen is used to access the
Calculator and Calendar.
Calculator
The calculator operates just like most other
calculators.
Calendar
Use the button on the Calendar to check
dates, Days of the week, and months.
CONTROL FUNCTION
MC Memory Clear
MR Memory Restore
MS Save to Memory
M+ Add # in Memory
<_ Backspace
CE Clear Display
+/= Plus and Minus Alternate
. Dot Display
sqrt extract the square root
% Percent
1/x Fraction
= Enter
Exit Calculator
C Clear
+,-,*,/
The four arithmetic operations
0-9 Numeric Display