User`s guide

28 • Calibration
6
Calibration
In data acquisition process, how to calibrate your measurement devices to
maintain its accuracy is very important. This chapter will guide you to
calibrate your ACL-8113A to an accuracy condition.
6.1 What do you need
Before calibrating your ACL-8113A card, you should prepare some
equipment for the calibration:
1. Calibration program: once the program is executed, it will guide you
to do the calibration. This program is included in the delivered
package.
2. one 6 1/2 digit multimeter.
3. a voltage calibrator or very stable and noise free DC voltage
generator.
6.2 VR Assignment
There are four variable resistors (VR) on the ACL-8113A board to allow you
making accurate adjustment on A/D and D/A channels. The functionality of
each VR is listed below:
VR1 A/D Bipolar offset adjustment
VR2 A/D Bipolar full-scale adjustment
VR3 Programmable amplifier offset adjustment
VR4 A/D Bipolar full-scale adjustment