Texas Instruments PGA309EVM-USB - Manual (Page 33)

www.ti.com PGA309EVM-USB Software Overview
4.8.4 Temperature Error Compensation Functions
Figure 23 shows the Temperature Error Compensation sub-tab.
Figure 23. PGA309EVM-USB Software: Auto Calibrate Tab—Temperature Error Compensation
The Temperature Error Compensation sub-tab is divided into six separate measurements (refer to
Figure 23 ). When using the sensor emulator option, you can complete the calibration by pressing the
Read button six times. Each time the Read button is pressed, the sensor emulator adjusts the
temperature signal and the bridge signal automatically to correspond to the temperature and load
required. For real-world sensors, however, the EVM must be physically placed in an environmental
chamber; the user must then adjust the temperature and applied load as required by the table. When all
six measurements are completed, press the Calculate and download LUT button to update the
EEPROM look-up table (LUT). After pressing the Calculate and download LUT button, the module is
calibrated, and should output the desired voltage according to the specified load and temperature.
33 SBOU084 – February 2010 PGA309EVM-USB
Submit Documentation Feedback
Copyright © 2010, Texas Instruments Incorporated