Calibrating The Voltage Offset And Gain - Data Translation DT9828 User Manual

Chapter 7

Calibrating the Voltage Offset and Gain

To calibrate the 24-bit A/D offset and A/D gain circuit on the DT9828 module, you must use a
precision voltage standard, such as the Krohn-Hite Model 523 or equivalent, and a shorting
plug.
To calibrate the voltage offset and gain, perform the following procedure:
1. Wire a shorting plug to analog input channel 0.
2. From the Voltage Calibration section of the dialog box, click Run.
3. Ensure that 0 V is applied to analog input channel 0, and then click OK.
4. Apply 140 mV to analog input channel 0, and then click OK.
Note: If you are not satisfied with the analog input calibration, you can load the factory
default settings stored in the EEPROM by clicking Restore Factory Settings.
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The voltage offset value is calibrated automatically.
The voltage gain value is calibrated automatically.