User`s guide

Calibration •67
6.4 D/A Adjustment
6.4.1 Unipolar Analog Output
1. Set JP1 to select unipolar. Connect VDM (+) to CN3 pin-30 (DAOut)
and VDM (-) to A.GND.
2. Write the digital value 0 to DAC. Trim VR2 to obtain 0V reading in
the DVM
3. Write the digital value 4095 to DAC. Trim VR1 to obtain 10V reading
in the DVM.
6.4.2 Bipolar Analog Output
1. Set JP1 to select bipolar. Connect DVM (+) to CN3 pin-30 (DAOut)
and DVM(-) to A.GND.
2. Write the digital value 2048 to DAC. Trim VR2 to obtain 0V reading
in the DVM.
3. Write the digital value 4095 to DAC. Trim VR1 to obtain +10V
reading in the DVM.
A calibration utility is supported in the software CD 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.
In normal condition, the PCI-9111 already calibrated by factor before it
is shipped out. So, users do not need to calibrate your PCI-9111 when
you get it.