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CY8CKIT-025 PSoC® Precision Analog Temperature Sensor Expansion Board Kit Guide, Doc. # 001-65791 Rev. *J 43
Example Projects
Figure 5-7. IDAC Configuration
5.2.3.3 Firmware Description and Flowchart
The temperature calculation flowchart for each sensor and the flowchart for calibrating RTD and
diode are explained in this section. A single point calibration is provided for RTD and diode.
5.2.3.3.1 Thermocouple
Figure 5-8 illustrates the steps involved in thermocouple temperature measurement.
This flowchart involves conversion of voltage to temperature and vice versa. The conversion is done
using thermocouple calculator component, which in turn uses the polynomial provided by NIST. The
mathematical conversion results in an error less than 0.07 °C.
The example project uses a K-type thermocouple. The component supports all thermocouple types
and provides application programming interfaces (APIs) for voltage to temperature conversion and
vice versa. IC (DS600) or thermistor can be used for cold junction compensation.