Data Translation DT9812 Series, User Manual

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Chapter 8
100
Calibrating the Analog Output Subsystem
This section describes how to use the DT9812 Series Calibration Utility to calibrate the analog
output subsystem of a DT9812-10V, DT9812-10V-OEM, DT9812A, DT9813-10V, DT9813A,
DT9814-10V, orDT9814A module.
To calibrate the analog output circuitry, you need to connect an external precision voltmeter to
analog output channels 0 and 1 of the module.
Do the following to calibrate the analog output circuitry:
1. Select the D/A Configuration tab of the DT9812 Series Calibration Utility.
2. Connect an external precision voltmeter to Analog Output 0 (DAC Ch0) of the module.
3. Adjust the offset by entering values between 0 and 63 in the DAC 0 Offset edit box, or by
clicking the up/down buttons until the voltmeter reads 0 V.
4. Connect an external precision voltmeter to Analog Output 1 (DAC Ch1) of the module.
5. Adjust the offset by entering values between 0 and 63 in the DAC 1 Offset edit box, or by
clicking the up/down buttons until the voltmeter reads 0 V.
Note: At any time, you can click Restore Factory Settings to reset the D/A calibration
values to their original factory settings. This process will undo any D/A calibration settings.
Once you have finished this procedure, the analog output circuitry is calibrated. To close the
DT9812 Series Calibration Utility, click the close box in the upper right corner of the window.