Journal ArticleDOI
Measuring thermoelectric effects in thermal converters with a fast reversed DC
M. Klonz,T. Spiegel,R. Zirpel,Barry D. Inglis,G. Hammond,H. Sasaki,K. Takahashi,B. Stojanovic +7 more
- Vol. 44, Iss: 2, pp 379-382
TLDR
In this paper, the AC-DC transfer differences of thermal converters due to thermoelectric effects in the heater circuit are directly measured with a fast reversed DC to an uncertainty of a few parts in 10/sup 7.Abstract:
The AC-DC transfer differences of thermal converters due to thermoelectric effects in the heater circuit are directly measured with a fast reversed DC to an uncertainty of a few parts in 10/sup 7/. This new and independent method allows former theoretical methods for evaluating thermoelectric effects in thermal converters to be checked. >read more
Citations
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Journal ArticleDOI
Development of thin-film multijunction thermal converters at PTB/IPHT
M. Klonz,H. Laiz,E. Kessler +2 more
TL;DR: The statistics of the mass production of the thin-film multijunction thermal converter show that PMJTCs built into a housing with an N-connector at the input can be reproducebly manufactured with an AC-DC voltage transfer difference smaller than 0.3 /spl mu/V/V at 10 Hz.
Journal ArticleDOI
AC-DC current shunts and system for extended current and frequency ranges
P.S. Filipski,M. Boecker +1 more
TL;DR: A new ac-dc current-shunt calibration system with a current range of 1 mA-100 A and a frequency range from 10 Hz to 100 kHz and a set of reference coaxial shunts with dedicated thermal voltage converters is described.
Journal ArticleDOI
Sensitivity enhancement of a silicon micro-machined thermal flow sensor
TL;DR: A micro-machined thermal flow sensor to measure a minute amount of gas flow rate is developed, and tested to quantify the flow measuring characteristics over the variation of flow rate as mentioned in this paper.
Journal ArticleDOI
Thermoelectric transfer difference of thermal converters measured with a Josephson source
Charles J. Burroughs,Samuel P. Benz,Clark A. Hamilton,Todd E. Harvey,Joseph R. Kinard,Thomas E. Lipe,H. Sasaki +6 more
TL;DR: The thermoelectric transfer difference of two thermal voltage converters using a Josephson source is measured and the results to similar measurements made with a conventional semiconductor source are compared.
Proceedings Article
Ac Josephson voltage standard : Progress report
TL;DR: In this article, a bias control circuit that provides output current amplification, transient suppression, and submicrosecond settling time is used with both superconductor-insulator-superconductor (SIS) and SNS junction arrays for fast, automated measurements of A/D converter linearity, a test for subnanovolt accuracy, waveform synthesis, and a preliminary measurement of the ac-dc difference of a thermal voltage converter.
References
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Journal ArticleDOI
Standards for AC-DC Transfer
TL;DR: In this article, the basic principles of ac-dc transfer measurements are presented together with background to the performance and basic limitations of thermal converters as transfer standards, with emphasis on developments since 1985.
Journal ArticleDOI
Accurate thin film multijunction thermal converter on a silicon chip (AC-DC standard)
M. Klonz,T. Weimann +1 more
TL;DR: In this paper, a planar, thin-film, multijunction thermal converter (MJTC) on a silicon chip containing a window with a SiO/sub 2/ membrane for low heat conductance underneath the thermal element is described.
Journal ArticleDOI
AC-DC transfer difference of the PTB multijunction thermal converter in the frequency range from 10 Hz to 100 kHz
TL;DR: In this article, the ac-dc transfer difference of the multijunction thermal converter (MJTC) developed at Physikalisch-Technische Bundesanstalt (PTB) has been evaluated for various heater resistances between 27 and 700 Ω.
Journal ArticleDOI
Theoretical Analysis of the AC/DC Transfer Difference of the NPL Multijunction Thermal Convertor over the Frequency Range DC to 100 kHz
TL;DR: In this paper, the authors examined the influence of both Thomson heating and the reactive components of the heater on the performance of the NPL multijunction convertor, and set out the theoretical analysis that supports the claim that its ac/dc transfer difference does not exceed 1 or 2 ppm up to a frequency of 100 kHz.
Journal ArticleDOI
AC-DC-mV-transfer with highly sensitive thin-film multijunction thermal converters
TL;DR: In this paper, the responsivity of the thin-film multijunction thermal converter is improved to 16 VW/sup -1/ in air and 120 VW /sup - 1/ in vacuum.