User`s guide

70 • Software Utility
7.1.3 Calibration
This function guides you to calibrate the PCI-9111. The calibration
program serves as a useful test of 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 of 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 items menu is displayed on the screen. After you select one of
the calibration items from the calibration items menu, a calibration window
shows. The upper window shows the detailed procedures which have to
be followed when you proceed the calibration. The instructions will guide
you to calibrate each item step by step. The bottom window shows the
layout of PCI-9111. In addition, the proper Variable Resister (VR) will
blink to indicate the related VR which needs 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.
If you select 3, the following figure displays on the screen: