For the first RTD measurement:
- Select multiplexer settings for AINP and AINN to measure leads 1 and 2 of the first RTD
- Enable the PGA, set gain to desired value
- Select data rate and digital filter settings
- Select reference input to measure RREF for ratiometric measurement
- Enable the internal reference (the IDAC requires an enabled internal reference)
- Set IDAC magnitude and select IDAC1 output pin to drive lead 1 of the RTD and select IDAC2 output pin to drive lead 2 of the RTD
For the second RTD measurement:
- Select multiplexer settings for AINP and AINN to measure leads 1 and 2 of the second RTD
- Set IDAC magnitude and select IDAC1 output pin to drive lead 1 of the RTD and select IDAC2 output pin to drive lead 2 of the second RTD
For the third RTD measurement:
- Select multiplexer settings for AINP and AINN to measure leads 1 and 2 of the third RTD
- Set IDAC magnitude and select IDAC1 output pin to drive lead 1 of the RTD and select IDAC2 output pin to drive lead 2 of the third RTD