The transfer function is not specified in the documentation because our controllers are universal. They control using almost any temperature sensor, so the transfer function depends specifically on the sensor.

For example, if you use a 10 kΩ thermistor (follow this link for a 10 kΩ example Resistance vs. Temperature chart) and the 100 µA bias current, the voltage at 25°C will be 1 V.

For a 20 kΩ thermistor (20 kΩ example chart) with the same bias current, the voltage at 25°C will be 2 V.

If you let us know what sensor you’ll be using, we can also help determine the voltage-to-temperature relationship.