OPERATOR’S MANUAL
GAC® 2100 Grain Analysis Computer (Blue, Gray, Agri Models)
11001-1688-201609
70 TEST UNIT PERFORMANCE
VIEW DIAGNOSTIC MODE (6 KEY)
The Diagnostic Mode accesses unit operating values. Most of the readout
values relate to the test cell circuitry.
To Access Diagnostic Details:
1. Press the 6 key to enter DIAGNOSTIC MODE (PAGE 1). Two pages of
information are available (Figure 58).
2. Choose the number key next to each selection, one key at a time.
Each value calculates and is displayed next to the line title. If the
printer is connected, a printout of each result is automatically printed
(Figure 59) for PAGE 1 printout and (Figure 60) for PAGE 2 printout).
The meaning of each line is as follows:
1: Vnull - Null voltage from cell board.
2: Vtemp - Temperature diode voltage from cell board.
3: Cwgt - Counts from weight oscillator.
4: Ce/f - Ratio of empty cell weight oscillator counts to full cell
weight oscillator counts. When the 4 key is selected, item 3
blanks to recalculate. The message PLEASE WAIT followed by
PLACE WEIGHT ON CELL THEN PRESS ENTER displays. A
test weight is placed on top of the test cell and then the Enter
key is selected. After a short wait, the results will display.
5: SCD1 - D1 (conductivity) self-check - 379 ±20. When either the 5
or 6 key is selected, these two items calculate.
6: SCD2 - D2 (capacitance) self-check- 2500 ±20.
7: Temp - Computed cell temperature in degrees C.
Figure 58
Diagnostic Mode Screens
TESTS MENU
1: non-active
2: COM1
3: COM2 TRANSMIT
4: non-active
SELECT ITEM NUMBER
(NEXT PAGE: STATUS)
5: DISPLAY
6: DIAGNOSTIC MODE
7: TEST NETWORK MODE
8: PARAMETERS MENU
DIAGNOSTIC MODE PAGE 1
1: Vnull 5: SCD1
2: Vtemp 6: SCD2
3: Cwgt 7: Temp
4: Ce/f 8:
SELECT TEST NUMBER <more>
DIAGNOSTIC MODE PAGE 2
5 KHz (D1) 2 MHz (D2)
1: Vc 5: Vc
2: Vc - Vn 6: Vc - Vn
3: Vsc 7: Vsc
4: Vsc - Vn 8: Vsc - Vn
SELECT TEST NUMBER
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