
R34, Range 1, 0.333V
R35, Range 2, 0.416V
R36, Range 3, 0.583V
R37, Range 4,
0.666V
R38,
Range 5,
1V
R39,
Range 6,
2V
R40,
Range 7,
4V Trim
R41,
Range 8,
8V Trim
Measure voltages at Pin 1
of U8
Figure 10-3: Range Switch Voltage Calibration Points
•
Set pattern switch 1 to “
ON
” or “
1
”.
•
Set pattern switches 2 through 16 to “
OFF
” or “
0
”.
•
Press the Manual Load Switch so that only the Stage 1 LED is illuminated.
•
Rotate the Stage 1 Programming Pot to full CW.
•
Ensure Programming Pots 2 through 16 are all set full anti-clockwise.
•
Refer to Table 10-1 and adjust trim pots so that the voltage at pin 1 of U8 to the
*exact* voltage listed for each position of the Range Switch.
Range Switch Position
Trim Pot
U8 Pin 1 Voltage
1 R34
0.333V
2 R35
0.416V
3 R36
0.583V
4 R37
0.666V
5 R38 1V
6 R39 2V
7 R40 4V
8 R41 8V
Table 10-1: Range Switch Calibration Table
112