NuDAQ ACL-8112 Series, Руководство пользователя

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Calibration & Utilities
6.4 D/A Adjustment
There are two steps to calibrate the analog output channels, D/A 1 and
D/A 2. The first step is to adjust the reference voltage, and the second
step is to adjust each channel of D/A.
D/A Channel Calibration
D/A CH1 calibration:
1. Connect VDM (+) to CN3 pin-30 ( AO1) and VDM(-) to A.GND.
2. Write the digital value 0x0FFF into registers ( BASE+ 4 and BASE+ 5)
3. Trim the variable resister VR3 to 5V reading in the DVM.
D/A CH2 calibration :
1. Connect VDM (+) to CN3 pin-32 ( AO2) and VDM(-) to A.GND.
2. Write the digital value 0x0FFF into registers ( Base + 6 and + 7)
3. Trim the variable resister VR4 to 5V reading in the DVM.
A calibration utility is supported in the software diskette which is included
in the product package. The detailed calibration procedures and
description can be found in the utility. Users only need to run the software
calibration utility and follow the procedures. You will get the accurate
measure data.