Flavio Galliana

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At IEN, a guarded switching system for automatic selection of high value resistors under calibration was developed and metrologically characterized. By means of this system it is possible to select and connect to the measurement system [1, 2] high value resistors in three terminals configuration. As a matter of fact, its guard system allows to reduce the(More)
The capacitance-charging method is a well-established and handy technique for the generation of dc current in the 100 pA range or lower. The method involves a capacitance standard and a sampling voltmeter, highly stable devices easy to calibrate, and it is robust and insensitive to the voltage burden of the instrument being calibrated. We propose here a(More)
This paper describes a measurement circuit for the calibration of pico-ammeters in dc current. The system is based on a 100 MΩ Hamon network developed at INRIM to improve the traceability level of the maintained 1 GΩ standard. Besides the Hamon network, the measurement system, presented in this paper, consists of a precision dc voltage source and an(More)
(INRIM), a Hamon guarded 10×100 M network was developed to improve the traceability levels of dc resistance at 1 G level. Utilizing and revisiting this project, a Hamon 10×10 G network is developed to extend the capabilities of the Hamon scaling technique up to 100 G. The novelty of the 10 × 10 G network is its improved guard system, and the improvement for(More)
Recently at National Institute of Metrological Research (INRIM) a Hamon actively guarded 10×100 MΩ was developed to improve the traceability levels at 1 GΩ level. Utilizing and revisiting this project, a Hamon 10×10 GΩ network is now under realization to extend the capabilities of the Hamon method up to 100 GΩ. Moreover, by means of this Hamon network, it(More)
—A measurement technique to calibrate current clamp meters in ac current in the measurement range from 100 to 1500 A at 50 Hz has been developed at the National Institute of Metro-logical Research (INRIM) in addition to the primary reference measurement systems for ac current calibrations at INRIM. This technique is traceable to the national standards of dc(More)
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