Determination of the Standard Resistor Temperature Coefficients and Their Uncertainties

Abstract

<p>SNSU TK-BSN’s capability in determining the temperature coefficients of a standard resistor has been improved. The temperature coefficient is one of the important parameter in determining the definition of the standard resistor. Currently, the measurement result has been reported together with the measurement uncertainty. The determination itself is based on a numerical approach of Taylor Series Approximation (TSA) instead of based on a fitting to a certain equation. And by this determination, the uncertainty was calculated. The determination was validated by comparing the measurement result committed by SNSU TK-BSN to that of by the manufacturer. The equation for the temperature coefficient follows the parabolic equation with an alpha coefficient of -5.30 x 10-8 Ω/Ω/°C and beta coefficient of -4.70 x 10-8 Ω/Ω/°C<sup>2</sup>, with the respective uncertainties of 2.4 x 10-8 Ω/Ω/°C and 1.6x 10-8 Ω/Ω/°C<sup>2</sup>, respectively. SNSU TK-BSN measurement results in determining the temperature coefficient in agreement with the manufacturer's measurement results show an appropriate value. This correspondence has an equivalent degree of 0.20 for the alpha temperature coefficient and 0.27 for the beta coefficient.</p>

A Methodology to Analyze and Evaluate the Uncertainty Propagation due to Temperature and Frequency and Design Optimization for EMC Testing Instrumentation

“…Any electrical component is affected by changes in temperature, humidity, geometry and the applied electrical field [1][2][3][4]. Depending on the operating conditions and the design chosen, each of the aforementioned quantities can have a stronger impact than others [8,9]. Since the instrument analyzed in this paper is an EMI receiver for measurements of conducted emission, its operating condition is not affected by geometry or environmental conditions since once designed its geometry cannot change and it is intended for use in environments, for example laboratories, where humidity is under control.…”

“…where R1 is the resistance at room temperature, R2 is the resistance at the operating temperature, T1 is the room temperature while T2 is the operating temperature. The reference, or room temperature, is usually set at +25 • C [9]. Every manufacturer sets their own method to evaluate and define the TCR.…”

“…It is well known how different parameters can affect electrical components, affecting not only their nominal value, but also increasing their degradation over time and consequently reducing their estimated lifetime [1][2][3][4]. Furthermore, frequency has a strong impact on electrical components and parasitic components can give rise to problems that were not considered in the design phase [5][6][7][8][9][10][11].…”

“…The paper is organized as follows: Section 2 provides an overview of the existing studies and works on how to evaluate the influence on the measurand of external factors and method commonly used [1][2][3][4][6][7][8][9][10][11]. Section 3 is dedicated at describing the proposed methodology and the instrument used for its verification.…”

Simulation of temperature dependence measurements of resistance measures by SVD

“…In papers [5,6] some aspects of the measurement of temperature coefficients are considered, and the obtained estimates of the measurement uncertainty based on the GUM guidelines [7] are analysed.…”