Hioki RM3548 - Appx. 6 Effect of Thermoelectromotive Force (Thermal EMF)

Hope Electronics Technology Manual Edition V1.0 81
For example, the temperature coefficient of copper at 20°C is 3930 ppm/°C,
so the constant k in this case is as follows, which shows almost the same value
as the constant for copper 235 defined by the IEC standard.