F. Galliana et Pp. Capra, A new automatic reference and switching unit for calibration of high valueresistors in the range 100 k Omega to 10 T Omega, MEASUREMENT, 29(4), 2001, pp. 269-277
We describe a Reference and Switching Unit (RSU), that, with a digital mult
imeter (DMM) and a de voltage calibrator, constitutes a system for calibrat
ion of standard resistors in the range 100 k Omega -10 T Omega at measureme
nt voltages up to 1000 V. This system represents an implementation of a DMM
-based system already developed at IEN. We report the characteristics of th
e DMM-based system, the metrological and electronic features of the RSU, th
e uncertainty levels that can be achieved with the DMM-based and whit the R
SU-based systems. Finally, we show the: obtained results in order to check
the compatibility of the two systems in the calibration of standard resisto
rs in the range 1 G Omega -1 T Omega. The 2 sigma best measurement capabili
ties of the RSU-based system span from 6.3 x 10(-6) for the calibration of
a 100 k Omega standard resistor at 10 V, to 1.2 x 10(-3) for tile calibrati
on of 10 T Omega standard resistor at 1000 V. (C) 2001 Elsevier Science Ltd
. All rights reserved.