User`s guide

Software Utility • 95
7.1.3 Calibration
This function is used to guide you though on how to calibrate the PCI-9111.
The calibration program serves as a useful test for the PCI-9111's A/D and D/A
functions and can aid in troubleshooting if problems arise.
Note: For an environment with frequently large changes in temperature and
vibration, a 3 months re-calibration interval is recommended. For
laboratory conditions, 6 months to 1 year is acceptable.
When you choose the calibration function from the main menu list, a calibration
sub-menu is displayed on the screen. After you select one of the calibration
items from the calibration sub-menu, a calibration window shows. The upper
window outlines procedures to follow when calibrating the board. The
instructions guide you through the calibration process step by step. Figure 19
shows the layout of PCI-9111. The correct adjusting Variable Resister (VR) will
blink to indicate the VR that requires to be adjusted for the current calibration
step.
****** PCI-9111 Calibration ******
<1> D/A (Bipolar) channel voltage full range adjusting
<2> D/A
(Unipolar) channel voltage full range adjusting
<3> A/D (Gain = 1, -10V ~ 10V) adjusting
<Esc> Quit
Select 1 to 3 or <Esc> to quit calibration.
Figure 19. Calibration Menu