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A. D. Rusin
Instrumental
and Systematic Errors of the Vapour Pressure Measurements with the Quartz
Bourdon Gage
Abstract
The
setup for vapour pressure measurements has been described. Sensitivities and
statistical estimates of instrumental errors in vapour pressure measurements
have been determined for three quartz Bourdon gauges up to 740°.
The thermal drift of the zero point of these gauges has been investigated. The
thermal drift of the zero point has been shown to be the main source of
systematic errors in pressure measurements at elevated temperatures. A method
for vapour pressure measurements with regard to the zero point thermal drift
has been suggested. Minimal possible errors with account of the zero point
thermal drift have been estimated to be in the range of 0.6-6 Torr at the
confidence level 0.95.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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