Обеспечение единства измерений толщины металлических покрытий вихретоковыми фазовыми толщиномерами при их градуировке и поверке

Abstract

The article is devoted to problems of assurance of uniformity of metallic coatings thickness measurement by phase-sensitive eddy-current method. The physical principles of method, design and metrological features of measuring instruments are analysed. The measurands variables and factors affecting measurement accuracy are considered, the dependences which describe their influence on accuracy of metallic coatings thickness measurements at graduation, verification and calibration of measuring instruments are considered. The requirements to electro-physical properties of metallic coating thickness standards are formulated.