Design Principle and Data Analysis of Clamp Meter

Clamp meter is widely used in the production. It is divided into the current clamp meter, voltage clamp meter and resistance clamp meter according to its function. In this article, design idea and design method of a resistance clamp meter are given. Taking the resistance clamp meter as the object, from signal generation, sensing, detection, filtering, and other aspects the design principle and circuit model is described, the actual data measured, and the reason of measurement error analyzed.