Design, implementation, and characterization of a new resistance box fabricated with fifteen outputs decades. (April 2017)

• Record Type: Journal Article
• Authors: Raouf, M. Helmy A.
• Is Part Of: Measurement. Volume 101(2017)
• Page Start: 206
• Page End: 210
• Publication Date: 2017-04
• Subjects: New resistance box -- Automated resistance measurements -- Microcontroller technique -- Electronic reed relays -- Resistance box characterization; Weights and measures -- Periodicals; Measurement -- Periodicals; Measurement; Weights and measures; Periodicals; 530.8
• DOI: 10.1016/j.measurement.2017.01.038
• Languages: English
• ISSNs: 0263-2241

Abstract

Highlights: Three units of 15 output decade resistance have been designed to construct a new Resistance Box. Stability of the new fabricated RB is estimated to be around ±25 ppm. Maximum relative deviation from the nominal values of the new RB steps is ±50 ppm. Relative uncertainty because of the summation effect is less than ±6.0 ppm. The new RB is mainly used for fully automated calibrations of resistance meters. Abstract: Resistance boxes are used for calibration of devices that measure resistance at many electrical laboratories. In this research, a new automated Resistance Box (RB) has been presented that mainly consists of three decades. They have the same design, but each has four different internal resistive elements. Each decade generates 15 different output resistance values; therefore, it is more economical and practical compared to the other usual decades, which produce only 10 values by using 10 internal resistive elements per decade. 4096 resistance values can be obtained by the all possible combinations of the new RB decades. Design, fabrication process, and characterization of the new RB are demonstrated in detail including its main specifications and advantages. Maximum relative deviation from the nominal values of the new RB steps is ±50 ppm.