Use of a 100 MΩ step Hamon resistor for calibration of pico-ammeters in dc current in the range 100 pA ÷ 100 nA

Pier Paolo Capra, Flavio Galliana, Milena Astrua, E. Gasparotto

Abstract:

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 electronic circuit used as voltage guard driver.
Keywords:
Download:

IMEKO-TC4-2007-012.pdf
DOI:

_unreg_tc4-2007.012

Event details:

IMEKO TC:

TC4
Event name:

TC4 Symposium 2007
Title:

XVth IMEKO TC4 International Symposium on Novelties in Electrical Measurements and Instrumentation (together with 12th IMEKO TC4 Workshop on ADC Modelling and Testing)
Place:

Iasi, ROMANIA
Time:

19 September 2007 - 21 September 2007