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Pressure balance cross-calibration method using a pressure transducer as transfer standard



Julia K. Scherschligt, Yuanchao Yang, Robert G. Driver, Douglas A. Olson


Piston gauges or pressure balances are widely used to realize the SI unit of pressure, the Pascal, and to calibrate pressure sensing devices. However, their normal operation is time consuming and requires a lot of technical expertise. In this paper, we propose an alternate method of performing a piston gauge cross calibration that incorporates a pressure transducer as an immediate in-situ¬ transfer standard. For a sufficiently linear transducer, the requirement to exactly balance the weights on the two pressure gauges under consideration is greatly relaxed. Our results indicate that this method can be employed without a significant increase in measurement uncertainty. Indeed, in the test case explored here, our results agreed with the traditional method within standard uncertainty, which was less than 6 parts per million.
NCSL International Measure


Piston Gauge, Pressure balance, transducer-aided calibration, cross-float


Scherschligt, J. , Yang, Y. , Driver, R. and Olson, D. (2016), Pressure balance cross-calibration method using a pressure transducer as transfer standard, NCSL International Measure, [online], (Accessed June 16, 2024)


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Created June 6, 2016, Updated November 10, 2018