Digital sampling setup for measurement of complex voltage ratio
| Autor: | Stanislav Maslan, Vera Novakova Zachovalova, Jiri Streit, Martin Šíra |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Acoustics Phase (waves) 02 engineering and technology 01 natural sciences 010309 optics High impedance Optics Sampling (signal processing) 0103 physical sciences Calibration 0202 electrical engineering electronic engineering information engineering Voltage source Electrical and Electronic Engineering Instrumentation Electrical impedance Physics Signal processing business.industry 020208 electrical & electronic engineering Phase angle Voltage divider Electrical engineering business Voltage Negative impedance converter |
| Zdroj: | 2016 Conference on Precision Electromagnetic Measurements (CPEM 2016). |
| Popis: | This paper describes a universal digital sampling setup for measurement of a complex voltage ratio. The setup was primarily designed for calibration of a phase angle error of current shunts, but it can be used for calibration of wide range of impedance standards in full complex plane. The setup allows calibration of impedances down to submegaohm range with compare currents up to 10 A and frequencies up to 100 kHz. The setup was also successfully used for comparison of inductive voltage dividers with ratio uncertainty approximately 1 $\mu \text{V/V}$ . Achieved expanded uncertainties are a few microvolts per volt for near unity voltage ratio and up to 35 $\mu \text{V/V}$ for voltage ratio 1:10 at 100 kHz. The phase uncertainty is below 1 $\mu $ rad at 1 kHz and below 50 $\mu $ rad at 100 kHz for ratio 1:10 (confidence level 95 %). Due to the used signal processing techniques, the setup can be used to measure complex voltage ratio even with just a few millivolt voltages at the inputs. |
| Databáze: | OpenAIRE |
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