DASP-52282 Card User’s Manual
Calibration
47
C h a p t e r 5
Calibration
5.1 Calibration VR Description
There are ten variable resistors (VR) on the DASP-52282 to
adjust the A/D and D/A channels. A precision voltmeter with 4 1/2
digits should be used to take an accurate voltage reference. A
calibration program can be found on the DASP-52282 software
disk to perform the calibration steps. It is strongly recommended
to warm up the computer 30 minute before performing calibration.
Locations of individual VR are shown in Chapter 2. The
corresponding VR’s function is depicted as below.
VR Number
Description
VR1 Reserved
VR2
ADC Analog Input Span Adjustment
VR3
ADC Bipolar Analog Input Offset Adjustment
VR4
ADC Unipolar Analog Input Offset Adjustment
VR5
DAC Channel 1 Bipolar Offset Adjustment
VR6
DAC Channel 1 Unipolar Offset Adjustment
VR7
DAC Channel 2 Unipolar Offset Adjustment
VR8
DAC Channel 2 Bipolar Offset Adjustment
VR9
DAC Channel 1 Span Adjustment
VR10
DAC Channel 2 Span Adjustment
