Abstract: According to the fact that the digital multimeter was detected have problems like various types, multipex calibration items and after the calibration, the uncertainty of the evaluation results should be given within the whole test range. Manual uncertainty evaluation was proved to be time-consuming, laborious, inefficient and prone to errors. Based on the VEE Pro software-exploiting platform, the system of automatic evaluation of uncertainty of measurement result of indication error of digital multimeter was developed. The system contains two moulds, the evaluation of uncertainty of digital multimeter with interface and the evaluation of uncertainty of digital multimeter without interface. Besides, the system could be automatically evaluated and saved the uncertainty data. And the uncertainty evaluation results of the indication error of dc voltage with examples could be showed up. The results show that the system is easy to operate; it can improve the working efficiency, reduce the man-made error and ensure the accuracy of test data.

Key words: Measurement uncertainty, Digital multimeter, Automatic evaluation