OPERATOR’S MANUAL
GAC® 2100 Grain Analysis Computer (Blue, Gray, Agri Models)
11001-1688-201609
NAVIGATION 13
NAVIGATION
DISPLAY SCREEN
The display screen is a graphics Liquid Crystal Display (LCD) and is
backlighted for low light level viewing.
ADJUST SCREEN CONTRAST
The Display Contrast Control is on the rear panel (Figure 6) immediately
above the COM1 and COM2 ports. The contrast control changes the
contrast between the displayed characters and the background. Adjust the
control as necessary for a comfortable contrast level in varying light
conditions.
KEYBOARD LAYOUT
All operator controls, except the Power ON/OFF switch and Contrast
control, are located on the front panel. These two are on the rear panel.
The sealed membrane keyboard contains 20 pressure-sensitive keys
requiring light finger pressure to actuate each key. Valid key closures result
in short tone bursts while invalid keystrokes generate longer tone bursts.
The function of each key or key group is defined as follows and illustrated in
(Figure 8).
Numbers (0 through 9), Decimal point (.) and Minus (–) keys
All numeric keys perform dual functions, making menu selections, and
entering numeric values. The four numeric keys with small arrows have the
additional function of screen navigation. When making a numeric entry, a
prompt on the display identifies the value entered and a cursor shows the
destination of each entry. The minus (-) sign is accepted at any point in the
entry and displays at the front of the entered string.
Figure 8
Keyboard Layout
Each entry immediately displays as the cursor moves to the right in
preparation for the next entry. Only the first entry of the decimal point is
acknowledged.
7
1
89
4
5
6
2
3
0
.
–
Keys 0, 1, 3, and 5
also function as
arrow keys to navigate
to certain screens.
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