Measurement of Self-Heating Affected Dynamic Error of Precision Wire-Wound Resistors

Abstract

This paper presents the thermal dynamic model of wire-wound resistors. In order to identify the thermal model an active bridge circuit is discussed. The power step response of the wire-wound resistors can be measured with the resolution of 1 ppm using the detailed circuit. Experimental results are also presented.

Keywords

• Precision wire-wound resistor
• self-heating
• thermal dynamic error
• high precision instrumentation.