PREDICTION OF THE OUTPUT VOLTAGE OF DC VOLTAGE STANDARDS |
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| Damir Ilic, Alan Ε ala, Ivan Lenicek |
- Abstract:
- In this paper we report some methods which upgrade the measurement uncertainty evaluation in analysis of the prediction of the output voltage of DC Reference Standards (Fluke 732A at 1 V, 1.018 V and 10 V levels). The monitoring of long-term stability of Zener-based voltage reference standards is one of the main tasks of Primary Electromagnetic Laboratory (PEL), which is a part of the Faculty of Electrical Engineering and Computing of the University of Zagreb, and a holder of national standards of voltage in Croatia. The long-term stability of its DC Reference Standard has been analysed according to the calibration data obtained in different laboratories over a period of more than twenty years. The weighted least-squares fitting was used and the regression coefficients were calculated, by which the maintained voltages at all three outputs can be predicted for a moment of interest. This approach significantly reduces the uncertainties of the maintained voltages.
- Keywords:
- DC reference voltage standard, least-squares analysis, long-term drift
- Download:
- IMEKO-WC-2009-TC4-670.pdf
- DOI:
- -
- Event details
- Event name:
- XIX IMEKO World Congress
- Title:
Fundamental and Applied Metrology
- Place:
- Lisbon, PORTUGAL
- Time:
- 06 September 2009 - 11 September 2009