Section 13 of ASTM B267 covers the thermoelectric power test for resistance wire. This measures the thermal electromotive force generated at junctions between the resistance wire alloy and copper.
Thermoelectric power (thermoEMF) is measured in accordance with ASTM B77. This property is important for wire-wound resistors used in precision circuits where parasitic thermoelectric voltages can introduce measurement errors.
The test determines the voltage generated per degree of temperature difference between the resistance wire and copper connections, which is critical for applications requiring high accuracy and stability.