Article Details

Abstract

To address the issues of low efficiency, significant human errors, and difficulty in meeting the requirements of online and dynamic metrology encountered in traditional manual verification and calibration of digital multimeters, an automatic verification and calibration system for digital multimeters based on the GPIB interface is designed. The system uses the FLUKE 5522A multi-function calibrator as the main hardware, complies with calibration specification JJF1587—2016, Calibration Specification for Digital Multimeters, and adopts the direct measurement method to accomplish the calibration process. Communication, control, and data transmission between the host computer, the standard source, and the device under test are realized via the GPIB bus. The proposed system enables automated execution of the calibration procedure, effectively reduces potential errors introduced by manual operation, and improves both the efficiency and accuracy of metrological work. The proposed system holds practical application value for the development of online metrology and dynamic metrology.

Keywords

multi-function calibrator; GPIB interface; automatic calibration

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About the authors

Duan Xiaoqian (June 1994-), female, Han ethnicity, from Xi'an, Shaanxi Province, engineer, master's degree, research direction: metrology technology and automated testing.