Bilateral comparison of CMI and SMU up to 900 MPa

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F23%3AN0000089" target="_blank" >RIV/00177016:_____/23:N0000089 - isvavai.cz</a>
Result on the web
<a href="https://www.nist.gov/system/files/documents/noindex/2023/05/22/CCM%20Program%20Book.pdf" target="_blank" >https://www.nist.gov/system/files/documents/noindex/2023/05/22/CCM%20Program%20Book.pdf</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Bilateral comparison of CMI and SMU up to 900 MPa
Original language description
A novel instrument on the market, type BH5-10000B by company Aréméca, was purchased by the CMI. It has a nominal working range from 0.02 GPa to 1 GPa. It was calibrated by the CMI up to 0.5 GPa in autumn 2021. However, due to the low range of this calibration, a question remained whether to use a linear or a quadratic approximation of effective area dependence on pressure. Meanwhile, the Slovak Metrology Institute (SMU) utilized a novel stand of its own design as a base for a commercial tungsten-carbide piston-cylinder by company Desgranges et Huot. The SMU calibrated it up to 0.2 GPa and tested up to 1 GPa. A bilateral comparison of both these new high-pressure standards took place in the laboratories of the CMI in November 2022. The original intended scope of the comparison was from 0.1 GPa up to 1 GPa but due to the leakage, piston fall-rate and sensitivity problems at the uppermost pressure point and the limited time for the measurements it was reduced to 0.9 GPa. The results of comparison were evaluated twofold – with a linear approximation for the Czech piston-cylinder and a quadratic one (a linear one for the SMU piston-cylinder in both cases). The results of both evaluations were satisfying but the quadratic approximation led to the values of the evaluation numbers to be lower by cca 20 % in average.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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