NIST Measurement Services: Error Analysis and Calibration Uncertainty of Capacitance Standards at NIST
This document presents the analysis of error sources that contribute to the total uncertainty of capacitance calibrations at the National Institute of Standards and Technology (NIST). Based on considerations of the measuring systems and calibration procedures, and data taken on NIST working and check standards and customer's standards, uncertainties in the calibrations for each model and nominal value of capacitor are estimated. The results of the analysis are expressed as expanded uncertainties using the coverage factor k = 2, in accordance with NIST Technical Note 1297. Also included are a detailed description and analysis for each component of error in the evaluation of Type A and Type B standard uncertainties.