An Improved Design of a Fully Automated Multiple Output Micropotentiometer
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Abstract
This paper describes in details a new design of a fully automated multiple output micropotentiometer (?pot). A prototype has been built at the National Institute for Standards (NIS), Egypt to establish this highly improved AC voltage source in the millivolt range. The new device offers three different outputs covering a wide frequency range from only one outlet. This valuably supports the precise sourcing ranges of low AC voltage at NIS. The design and the operation theory of this prototype have been discussed in details. An automatic calibration technique has been introduced through specially designed software using the LabVIEW program to enhance the calibration technique and to reduce the uncertainty contributions. Relative small AC-DC differences of our prototype in the three output ranges are fairly verified. The expanded uncertainties of the calibration results for the three output ranges have been faithfully estimated. However, further work is needed to achieve the optimum performance of this new device.
- U. Pogliano, G. C. Bosco and M. Lanzillotti, “Precision Measurement of AC Voltages in the Millivolt Ranges,” Proceedings, XVII IMEKO World Congress, 22-27 June 2003, Dubrovnik, Croatia, pp. 625-629.
- J. Zinkernagel, “A Low-Voltage and High-Frequency ac-dc Transfer System Using Inductive Dividers,” IEEE Transactions on Instrumentation and Measurement, Vol. 43, No. 4, August 1994, pp. 544-548.
- U. Pogliano, B. Trinchera and F. Francone, “Reconfigur- able Unit for Precise RMS Measurements,” IEEE Transactions on Instrumentation and Measurement, Vol. 58, No. 4, April 2009, pp. 827-831.
- I. Budovsky and B. D. Inglis, “High-Frequency AC-DC Differences of NML Single-Junction Thermal Voltage Converters,” Institute of Measurement, IEEE Transactions on Instrumentation and Measurement, Vol. 50, No 1, February 2001, pp. 101-105.
- H. Laiz and M. Klonz, “A Simulation Tool for the AC-DC Transfer Difference of Thermal Converters at Low Frequencies,” IEEE Transactions on Instrumentation and Measurement, Vol. 48, No. 6, December 1999, pp. 1155-1160.
- H. Fujiki, “New Thin-Film Multijunction Thermal Converter Design for Improved High-Frequency Performance,” IEEE Transactions on Instrumentation and Measurement, Vol. 7, No. 9, September 2007, pp. 1243-1247.
- M. Klonz, Laiz and E. Kessler, “Development of Thin- Film Multijunction Thermal Converters at PTB/IPHT,” IEEE Transactions on Instrumentation and Measurement, Vol. 50, No. 6, December 2001, pp. 1490-1498.
- M. Klonz, H. Laiz, T. Spiegel and P. Bittel, “AC-DC Current Transfer Step-Up and Step-Down Calibration and Uncertainty Calculation,” IEEE Transactions on Instrumentation and Measurement, Vol. 51, No. 5, October 2002, pp. 1027-1034.
- H. Dintners, M. Klonz, A. Lerm, F. VBlklein and T. Weimann, “AC-DC-mV-Transfer with Highly Sensitive Thin-Film Multijunction Thermal Converters,” IEEE Transactions on Instrumentation and Measurement, Vol. IM-42, April 1993, pp. 612-614.
- I. Budovsky, “A Micropotentiometer-Based System for Low-Voltage Calibration of Alternating Voltage Measurement Standards,” IEEE Transactions on Instrumentation and Measurement, Vol. 46, No. 2, April 1997, pp. 356-360.
- T. Funck, M. Stojanovi´c and M. Klonz, “Improved High- Input-Impedance mV-Amplifiers with Gain Factors from 10 to 900,” IEEE Transactions on Instrumentation and Measurement, Vol. 58, No. 4, April 2009, pp. 859-862.
- J. R. Kinard, D. X. Huang and D. B. Novotny, “Integrated Thin-Film Micropotentiometers,” IEEE Transactions on Instrumentation and Measurement, Vol. IM-44, April 1995, pp. 374-376.