Development and evaluation of an on-site calibration technique for energy meter reference standards

To address the challenges and time-consuming nature of the calibration process for electric energy meters, this paper proposes a method that involves calibrating energy reference devices directly at the customer’s site. This on-site calibration approach uses a traceable portable high accuracy reference standard. A software program is developed to simplify the process of taking readings and allow for efficient management of calibration data using a personal computer. In addition to the calibration itself, uncertainty budgets are estimated for both active and reactive electrical energy measurements. This provides a comprehensive understanding of the measurement uncertainties associated with the calibration process. Furthermore, the obtained results are validated using a conventional procedure and a normalized error tool to ensure the accuracy and validity of the proposed technique. Validation results indicate that the suggested method produces outcomes that are deemed satisfactory. Overall, this work offers a practical and reliable approach to on-site calibration, benefiting customers by saving time and effort while maintaining accurate measurement results.