An Automatic RMS/DC Comparator
- 1 January 1974
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Instrumentation and Measurement
- Vol. 23 (4) , 322-325
- https://doi.org/10.1109/TIM.1974.4314303
Abstract
The design of an instrument for the automatic comparison of an ac voltage with a stable dc source is described. A differential multijunction thermal converter is used as an rms/dc converter with an FET-switched input amplifier for ac/dc substitution. The output voltages of the rms/dc converter with ac and dc input voltages are sampled and stored, and the difference amplified and displayed on a panel meter or chart recorder. Accuracy is ±20 ppm of input ranges of 10-200 V at frequencies of 50 Hz-1 kHz, and maximum full scale deflection sensitivity is 0.01 percent of input range. The instrument may be used either as an rms comparator with a linear voltage scale or as a mean-square comparator with a linear power scale.Keywords
This publication has 8 references indexed in Scilit:
- Dielectric Absorption in Memory CapacitorsIEEE Transactions on Instrumentation and Measurement, 1972
- Theoretical Analysis of the AC/DC Transfer Difference of the NPL Multijunction Thermal Convertor over the Frequency Range DC to 100 kHzIEEE Transactions on Instrumentation and Measurement, 1972
- A hybrid circuit RMS converterPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1971
- A New Wideband True Rms-to-Dc ConverterIEEE Transactions on Instrumentation and Measurement, 1967
- A System for Accurate Direct and Alternating Voltage MeasurementsIEEE Transactions on Instrumentation and Measurement, 1965
- Multijunction thermal convertor. An accurate d.c./a.c. transfer instrumentProceedings of the Institution of Electrical Engineers, 1965
- An Analysis of Certain Errors in Electronic Differential Analyzers II-Capacitor Dielectric AbsorptionIEEE Transactions on Electronic Computers, 1958
- Thermal converters as AC-DC transfer standards for current and voltage measurements at audio frequenciesJournal of Research of the National Bureau of Standards, 1952