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The measurement of spot-welding current
Electrical Engineering, 1940CURRENT is an essential factor in the complete specification of spot-welding conditions. Therefore, the need for the measurement of spot-welding currents arises, if optimum conditions determined in experimental laboratories are to be duplicated in production shops. Laboratory methods must be accurate and supplemented by facilities for ready calibration
Wendell F. Hess +2 more
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Impact of Coreless Current Transformer Position on Current Measurement
IEEE Transactions on Instrumentation and Measurement, 2019Magnetic sensors have been widely used for current measurements in diverse industries. In order to achieve a large current measurement without an iron core structure, magnetic sensors are often arranged to be a circular array for designing a new electronic current transformer (ECT).
Xiaoyu Ma +4 more
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Measuring the metabolome: current analytical technologies
The Analyst, 2005The post-genomics era has brought with it ever increasing demands to observe and characterise variation within biological systems. This variation has been studied at the genomic (gene function), proteomic (protein regulation) and the metabolomic (small molecular weight metabolite) levels.
Dunn, Warwick +3 more
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Techniques for Traceable Measurements of Small Currents
IEEE Transactions on Instrumentation and Measurement, 2007The Italian national standard of direct current is being extended down to the femtoampere range. Two current sources have been developed. The first one, working in the 100 pA to 100 fA range, is based on a low-frequency trapezoidal wave generator, measured with a sampling digital voltmeter at regular time intervals, which charges and discharges a gas ...
CALLEGARO, LUCA +3 more
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Fault-Current Measuring Device
Transactions of the American Institute of Electrical Engineers, 1946IN electric power system operation numerous problems are encountered in analyzing the results of short circuits and in the physical location of the trouble. Some devices now available for analyzing short circuits in a-c circuits are the oscillograph, the annunciator ammeter, and a magnetic link device requiring rectifiers.
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Current techniques for measuring motion
Applied Ergonomics, 1984The sports scientist and the ergonomist, although sharing a common disciplinary background, pursue fundamentally different goals. The patterns of approach to the analysis of movement they adopt are, nevertheless, similar and a model of this approach is presented.
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The Measurement of Large Varying Currents
Transactions of the American Institute of Electrical Engineers, 1946IN OSCILLOGRAPHIC STUDIES where it is necessary to measure current in the range of from 5 to 100 kiloamperes, one must often resort to the use of shunts ...
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The Precise Measurement of Current Ratios
IEEE Transactions on Instrumentation and Measurement, 1964The development of the current comparator, a three-winding current ratio transformer, is reviewed and its characteristics as an alternating current ratio standard are analyzed. Particular attention is given to the use of magnetic shielding and its effect on the accuracy and usefulness of the device.
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Workshop: Measurement techniques for lightning currents direct current measurements
2017 IEEE International Symposium on Electromagnetic Compatibility & Signal/Power Integrity (EMCSI), 2017Outline 1. Introduction, History and Overview 2. Requirements for current measuring systems 3. Current sensors 4. Systems for data transfer 5.
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