NuDAQ ACL-8112 Series, User Manual

Page: 73 / 92

C Language Library
•
65
For ACL-8112DG card, the gain values only support 1, 2, 4, 8 four
levels. The relationship between analog input voltage range, gain and
input type are specified by table on next page.
** this table is suitable for ACL-8112DG ( low gain) card.
AD_INPUT GAIN
Input type
(Bipolar or Unipolar) Input Range
AD_B_5_V 1 Bipolar
±
5V
AD_B_2_5_V 2 Bipolar
±
2.5V
AD_B_1_25_V 4 Bipolar
±
1.25V
AD_B_0_625_V 8 Bipolar
±
0.625V
AD_U_10_V 1 Unipolar 0V ~ 10V
AD_U_5_V 2 Unipolar 0V ~ 5V
AD_U_2_5_V 4 Unipolar 0V ~ 2.5V
AD_U_1_25_V 8 Unipolar 0V ~ 1.25V
For ACL-8112DG card, the gain values suppst 1,2,4,8,and 16.
The initial value of gain is '1'. The relationship between gain and input
voltage ranges is specified by following tables:
when input voltage range is set to
±
5 V (JP9),
Gain Code Gain Input Range (V)
AD_GAIN_1 X 1
±
5 V
AD_GAIN_2 X 2
±
2.5 V
AD_GAIN_4 X 4
±
1.25 V
AD_GAIN_8 X 8
±
0.625 V
AD_GAIN_16 X 16
±
0.3125V
when input voltage range is set to
±
10 V(JP9),
Gain Code Gain Input Range (V)
AD_GAIN_1 X 1
±
10 V
AD_GAIN_2 X 2
±
5 V
AD_GAIN_4 X 4
±
2.5 V
AD_GAIN_8 X 8
±
1.25 V
AD_GAIN_16 X 16
±
0.625 V
Syntax
int _8112_AD_Set_Range( int ad_range )
int _8112pg_AD_Set_Gain( int ad_range )