학술논문
Flexible system for precision and automatic comparison of AC measuring devices
Document Type
Periodical
Author
Source
IEEE Transactions on Instrumentation and Measurement IEEE Trans. Instrum. Meas. Instrumentation and Measurement, IEEE Transactions on. 42(2):295-300 Apr, 1993
Subject
Language
ISSN
0018-9456
1557-9662
1557-9662
Abstract
A multipurpose modular system for comparison of AC-DC converters and other AC measuring devices was built at IEN. It allows the performance of measurements for a large set of devices in a wide range of voltages and currents. In particular, for currents up to 2 A, a special transconductance amplifier that supplies the current keeping the conjunction point of the two devices under comparison virtually at ground potential is integrated. The comparison system takes full advantage of automatic procedures, but with accuracy typical of the best manual systems. For example, groups of single-junction thermal converter comparisons show a typical spread (1 sigma ) of less than 1*10/sup -7/.ETX