ADLINK PCI-9810 - Manual (Page 75)

Calibration 63
7 Calibration
In data acquisition, you must calibrate your measurement devices
to maintain accuracy. You can calibrate the analog input and
analog output channels using your operating environment to
optimize accuracy. This chapter describes the calibration process
for the PCI-9812/9810 card.
7.1 Before You Proceed
You need the following equipment for the calibration process:
X Calibration utility. This application guides you through the
calibration process and is available from the card package.
X Voltage calibrator or a stable and noise-free DC voltage
generator.
7.2 VR Assignment
There are eight variable resistors (VR) on the PCI-9812/9810 card
that allows you to make accurate adjustments to the A/D
channels. The function of each VR is specified below.
VR1 A/D channel 0 offset adjustment
VR2 A/D channel 1 offset adjustment
VR3 A/D channel 2 offset adjustment
VR4 A/D channel 3 offset adjustment
VR5 A/D channel 0 full scale adjustment
VR6 A/D channel 1 full scale adjustment
VR7 A/D channel 2 full scale adjustment
VR8 A/D channel 3 full scale adjustment
Table 7-1: Functions of VRs