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Interlaboratory 'Pilot Run' Study of Small Heat-Flow-Meter Apparatus for ASTM C 518

Published

Author(s)

Robert R. Zarr, E S. Lagergren

Abstract

Thermal conductivity measurements of a high-density glass-fiber thermal insulation material near 24 C are presented for the determination of the precision and bias of ASTM Test Method C 518. The measurements have been conducted by 13 laboratories using small (305 by 305 mm) heat-flow-meter apparatus on three specimens of high-density glass-fiber thermal insulation material that were circulated among the laboratories. Test results are analyzed using ASTM Practice E 691 and subsequently compared to measurements of the same specimens conducted in a guarded-hot-plate apparatus using Test Method C 177. The 95% repeatability and reproducibility indexes for precision have been determined to be no worse than 1.1 % and 4.0 %, respectively. A method for estimating bias is presented.
Citation
Journal of Testing and Evaluation
Volume
27
Issue
No. 6

Keywords

bias, building technology, glass fiber, guarded hot plate, heat flow meter, interlaboratory, precision, repeatability, thermal conductivity

Citation

Zarr, R. and Lagergren, E. (1999), Interlaboratory 'Pilot Run' Study of Small Heat-Flow-Meter Apparatus for ASTM C 518, Journal of Testing and Evaluation, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860775 (Accessed March 1, 2024)
Created November 1, 1999, Updated February 19, 2017