SIMPLE AND RELIABLE SYSTEM FOR ACCURATE MAINTENANCE OF VOLTAGE STANDARDS |
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| Damir Ilić, Alan Ε ala, Ivan Leniček |
- Abstract:
- A new automatic system is described whereby precise, simple and reliable intercomparison of electronic voltage standards is enabled by using a self-developed 16 channel low-thermal switch and digital nanovoltmeter, controlled by the computer. It enables faster and easier comparison, as well as optimisation of the whole procedure. The control software was developed using a LabVIEW, and the obtained parameters are pointed out. At the Primary Electromagnetic Laboratory, which is a part of the Faculty of Electrical Engineering in Zagreb, the maintenance of the unit of volt is one of its important tasks, due to its role as a holder of national standards of voltage. Although the best possible accuracy (or maintenance of the highest level) is attainable by means of Josephson voltage standards, due to its costs and limited availability it is not the most practical, specially when the utmost level of accuracy is not essential. For measurement of voltage differences at a level of microvolts crucial attention has to be paid to avoid any unstable and changeable TEMS. Therefore, in the construction of the mentioned multi-channel low-thermal switch and digital nanovoltmeter this was the very important task.
- Download:
- IMEKO-TC4-2008-113.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC4
- Event name:
- Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
- Title:
- XVIth IMEKO TC4 International Symposium on Electrical Measurements and Instrumentation (together with 13th IMEKO TC4 Workshop on ADC Modelling and Testing)
- Place:
- Florence, ITALY
- Time:
- 22 September 2008 - 24 September 2008