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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Improved Power Coefficient of Sensitivity in a Series-Parallel Circuit of Thermal Converters
摘要： The power coefficient of sensitivity is a useful measure that can provide a deep insight into the improvement of the low-frequency ac–dc transfer difference. We have, therefore, derived the power coefficient of series–parallel connected thermal converters (TC) arranged in an m × m matrix, as a low-frequency ac-dc transfer standard. The obtained power coefficient of the m × m series–parallel connected TCs is found to decrease proportional to 1/m2, without any decrease in the sensitivity. The experimental results are in close agreement with the results of the analysis.
关键词： electrical variable measurement,numerical analysis,thermal converter,thermal voltage converter,AC–DC difference
更新于2025-09-10 09:29:36
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[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Modified Construction for Thermal Voltage Converter Multipliers Resistors
摘要： In this paper, a modification is done in the multipliers resistors of the thermal voltage converters (TVCs) to introduce a more accurate and precise standard for voltages higher than 0.5 V. The modified multiplier value which is designed and implemented at NIS, Egypt is 1 kΩ to cover the voltage range 5 V. The modified multiplier resistor (MMR) is built from ten metal-film resistors connected in series in a radial form. Modified TVC which is made by using this MMR is automatically calibrated at different frequencies. Its behavior is evaluated by the traditional TVC.
关键词： Thermal voltage converter,AC voltage calibration,Multipliers Resistors,Uncertainty,Ac-dc transfer difference
更新于2025-09-10 09:29:36