Issues relating to each element in the determination of a tank¿s contents are examined: level/density measurement, calibration, and its reverification. Systematic errors associated with dip tube pressures that are measured to derive level/density are investigated, experimentally. The conversion from these pressures to level/density is then addressed, and the simplest form is found to be adequate. A revised regression model is proposed to obtain a calibration from biased calibration data from one or more calibration runs. Severely biased calibration data can be eliminated, reducing the calibration error due to biases to a minimum. It is shown that a more accurate representation can be obtained using cubic splines. Finally, reverification issues are addressed by proposing a new continuous fill approach.
BINNER Robert;
HOWELL John;
JANSSENS-MAENHOUT Greet;
SELLINSCHEGG Dieter;
ZHAO Ke;
2008-05-20
AMER CHEMICAL SOC
JRC43943
0888-5885,
http://dx.doi.org/10.1021/ie0712636,
https://publications.jrc.ec.europa.eu/repository/handle/JRC43943,
10.1021/ie0712636,
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