PRECISE MASS AND VOLUME DETERMINATION OF THE SILICON SINKER FOR SEA WATER DENSIMETRY |
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| Y. Kayukawa, Y. Fujita |
- Abstract:
- In order to improve measurement performance in sea water densimetry which is important in global environmental monitoring, a hydrostatic weighing system is under development in the NMIJ. A 100 g silicon sinker is used as a density reference and it is required to calibrate its mass and volume with higher accuracy that the conventional calibration procedures. In the present study, sub multiple mass measurement was conducted by using 1 kg silicon sphere and newly designed silicon disc weight set. The mass uncertainty was decreased to less than 0.01 mg for the silicon sinker. The volume of the sinker was measured by using a pressure-of-floatation method (PFM) to realize the relative uncertainty of the volume being 0.17 ppm.
- Keywords:
- silicon single crystal, density, mass, submultiple, hydrostatic weighing
- Download:
- IMEKO-TC3-2014-022.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC3
- Event name:
- TC3 Conference 2014
- Title:
22nd Conference on the Measurement of Force, Mass and Torque (together with 3rd TC22 Conference on Vibration Measurement and 12th TC5 Conference on the Measurement of Hardness)
- Place:
- Cape Town, SOUTH AFRICA
- Time:
- 03 February 2014 - 06 February 2014