Appendix D
– 46 –
PCI-1721 User’s Manual
Advantech Co., Ltd.
www.advantech.com
Table D-1 D/A binary code table
Note:
✎
1 LSB = FS / 4095 for Unipolar
(For example: 1LSB = 10 / 4095, while the range is 0 V to10 V)
1 LSB = +FS / 4095 for Bipolar
(For example: 1LSB = 10 / 4095, while the range is -5 V to +5 V)
D.3 Calibration Utility
The calibration utility, AutoCali, provides four functions - auto D/A
calibration and manual D/A calibration. The program helps the user to
easily finish the calibration procedures automatically, however, the
user can calibrate the PCI-1721 manually. The following steps will
guide you through the PCI-1721 software calibration.
Step 1: Access the calibration utility program AutoCali.exe from the
default location:
C:\Program Files\Advantech\ADSAPI\Utility\AutoCalibration
Note:
✎
If you installed the program to another directory, you can find this
program in the corresponding subfolders in your destination directory.
A/D code
Mapping Voltage
Hex.
Dec.
Bipolar
Unipolar
0000h
0
-FS
0
07FFh
2047
-1 LSB
0.5 FS - 1 LSB
0800h
2048
0
0.5 FS
0FFFh
4095
+FS - 1 LSB
FS - 1 LSB