AC Voltmeter Calibration

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Chatchawan Pornpatkul


AC digital voltmeter utilization without knowing the value of error and uncertainty of measurement will affect the products quality. In this paper, the technic and procedure for AC digital voltmeter calibration and the expanded uncertainty calculation are presented. One of instrument from ten in same model is randomized first. Then the calibration procedure fallows the guide EA-10/15 and calculates the expanded uncertainty from the guide to the Expression of Uncertainty in Measurement. The results of calibration in range 600mV by standard source 540.00 mV 100.00 Hz are found that the average of measurement value is 540.066 mV and the expanded uncertainty of measurement is not over than ± 0.2 mV.

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Pornpatkul, C. (2023). AC Voltmeter Calibration. Journal of Advanced Development in Engineering and Science, 1(1), 65–70. Retrieved from
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ชลิต คุ้มทวี และ ชัชวาล พรพัฒน์กุล (2554). เอกสารประกอบการฝึกอบรมเชิงปฏิบัติการ การสอบเทียบเครื่องวัดทางไฟฟ้า. สถาบันเทคโนโลยีปทุมวัน. กรุงเทพมหานคร.

European Association of National Metrology Institute (1997). Guideline on the Calibration of Digital Multimeter. EA-10/15. Edition 1. London.

Guide to the Expression of Uncertainty in Measurement (GUM). first edition 1995. ISBN 92-67-10188-9.