Table of Calibration System for Frequency Voltage Proportioning Measuring Instruments

This document establishes the comprehensive framework for verifying measurement instruments dedicated to power-frequency voltage ratio calibration. It defines the structural requirements, performance criteria, and procedural methodologies essential for ensuring the traceability and accuracy of such metrological systems. The content outlines the necessary conditions for reference standards, permissible uncertainties, and the specific testing protocols that must be followed during periodic or initial verification processes. Detailed instructions are provided regarding the environmental conditions under which assessments should occur, as well as the equipment configurations required to maintain metrological integrity. The guidelines specify how measurement data must be recorded, analyzed, and interpreted to determine compliance with established accuracy classes. By adhering to these provisions, calibration laboratories can ensure consistent and reliable results across various applications involving power-frequency voltage measurements. The document serves as an authoritative reference for technicians and quality assurance personnel responsible for maintaining the operational validity of voltage ratio measurement systems within the national metrology infrastructure.