Chases and escapes by Paul J. Nahin
A Coriolis flowmeter is operated to generate accurate output material flow information over a wide temperature range that includes cryogenic temperatures. Heretofore, temperature compensation was provided using linear expressions that erroneously assumed the value of Young's Modulus E varied linearly with temperature. This resulted in unacceptable output information errors. The Coriolis flowmeter of the present invention uses non linear compensation information stored in memory to generate accurate non linear temperature compensated material flow output information at all temperatures including cryogenic temperatures. In one embodiment, the stored non linear information represents measured values of Young's Modulus E that are used to generate accurate temperature compensated material flow output information. In another embodiment, the measured values of Young's Modulus E are curve fitted to derive non linear expressions that are stored for use in generating the accurate non linear temperature compensated output information.
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