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| Automatic Calibration System of Reference Level DC Standard Voltage Source |
| LI Jing-jing,WANG Qian-juan,SUN Zhi,JIN Hai-bin,LUO Chun-mei,HUANG Wen-yu |
| Beijing Oriental Institute of Measurement and Test, Beijing 100086, China |
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Abstract To calibrate high precision voltage source and simplify its calibration process, based on programmed low thermal potential switch matrix, an automatic calibration system for reference DC standard voltage source was developed. The composition of the system, the development of the low thermal potential switch matrix and the calibration method of the reference level DC standard voltage source were introduced. The uncertainty of the calibration system was also evaluated with DC voltage 100V reaching 2×10-6(k=2).
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