A New Precise Apparatus for Solid Density Measurement up to 10 kg

Abstract:

A proposed design and construction for a new apparatus used in measuring the solid density of masses from 1 kg up to 10 kg in the National Institute for Standards (NIS) at Egypt are presented. The apparatus operates manually and automatically for measuring the density of masses of class E using the hydrostatic weighing principle (Archimedes) according to used international standard. The principle of operation of the Hydrostatic Weighing Apparatus (HWA-NIS) depends mainly on measure the masses of the standard and the under test objects both in air and in liquid. The HWA-NIS measures the solid density with uncertainty of ±0.8 kg.m^-3 at coverage factor k = 2.The HWA-NIS has been used for measuring different nominal masses to validate its performance along the measuring range. The obtained results compared with the standard values. The comparison showed a good agreement between the HWA-NIS outputs and the standard values.

• Periodical: Advanced Materials Research (Volume 909)
• Pages: 127-134
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.909.127
• Online since: March 2014
• Authors: B.M. Sayed*, Badr Sh. Azzam, M.Z. Abdou, A.A. Eltawil
• Keywords: Archimedes Principal, Hydrostatic Weighing Apparatus, Mass Standard, Solid Density

References

[1] Bowman H A, Schoonover R M and Carroll C L, A density scale based on solid objects, J. Res. Natl Bur. Stand., (1974) A 78 13–40.

[2] Saunders J B Ball and cylinder interferometer, J. Res. Natl Bur. Stand., (1972), C 76 11–20.

[3] Fujii K et al Evaluation of molar volume of silicon crystals for a determination of the Avogadro constant, IEEE Trans. Instrum. Meas., (2003), 52 646–51.

DOI: 10.1109/tim.2003.810018

[4] Fujii K et al, Present state of the Avogadro constant determination from silicon crystals with natural isotopic compositions, IEEE Trans. Instrum. Meas., (2005), 54 854–9.

DOI: 10.1109/tim.2004.843101

[5] International Organization of Legal Metrology Recommendation No. 111 (OIML): classes E1, E2, F1, F2, M1, M2, M3 ‏", France, (2004).

[6] Gupta, S. V. Practical Density Measurement and Hygrometry, Institute of Physics, Bristol, UK, (2002).

[7] Yang, F., Pan., S., Density Measurement System of 50 kg Weights by Method A in OIML R 111 (2004) at CMS, XIX IMEKO World Congress, Lisbon, Portugal, (2009).

[8] Davis, R.S., Equation for the Determination of the Density of Moist Air (1981/91), Metrologia, 29, 67, (1992).

DOI: 10.1088/0026-1394/29/1/008

[9] Picard, A., Davis, R.S., Fujii, K. 'Reversed Formula for the Density of the Moist Air, Metrologia45, 149, (2008).

[10] Tanaka, M, Girard, G, Davis R, Peuto A and Bignell N, ‏Recommended Table for the Density of Water Between 0 oC and 40 oC‏, (2001).

DOI: 10.1088/0026-1394/38/4/3

[11] Fujii, K, ‏Precision density measurements of solid materials by hydrostatic weighing‏, J. Meas. Sci. Technol. 17, (2006).

[12] Davis, Dr. R. Certificate for 1 kg mass standard in stainless steel, . France : BIPM, Sep, (2010). 43.

[13] Davis, Dr. R. Certificate for 1 kg mass standard in stainless steel, . France : BIPM, Sep, (2010). 42.

[14] Dott. W. Bich. Certificate of calibration, . Italy : INRIM, Oct., (1999). 507.

[15] ISO Guide 43-1: 1997 Proficiency Testing by Interlaboratory Comparisons – Part 1: Development and Operation of Proficiency Testing Schemes, (1997).

DOI: 10.3403/01649560u