研究目的
To improve the accuracy of transient current sensor calibration for high current, short-circuit tests by developing a new system based on the Agilent (now Keysight) multimeter 3458A used as a digitizer.
研究成果
The new system allows the improvement of INRIM measurement capabilities. Further improvements are possible by investigating in detail the traceability characteristics of the digitalizer multimeter.
研究不足
Possible improvements include investigating the traceability of the multimeter in its use in digitization by means of an appropriate calibration in this acquisition method, referred to National Standard.
1：Experimental Design and Method Selection:
The study involves replacing the previous acquisition system with the Agilent 3458A multimeter used as a digitizer to improve calibration accuracy.
2：Sample Selection and Data Sources:
The system is tested with two different measuring systems based on Rogowsky coils.
3：List of Experimental Equipment and Materials:
Compensated current shunt, Agilent 3458A multimeter, high-speed cards (up to 100 kS / s) with 11 bits of effective resolution.
4：Experimental Procedures and Operational Workflow:
The multimeter's digitization parameters are automatically set, and raw data is read and scaled considering the shunt's scale factor.
5：Data Analysis Methods:
The software allows automatic recognition of the current peak, calculation of the integral of Joule over a set time interval, and creation of a calibration log.
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