| 摘要 |
PROBLEM TO BE SOLVED: To facilitate handling by simplifying calibration at customer site and to reduce time and cost required for calibration at the customer sites. SOLUTION: Density is measured through the use of a Coriolis mass flowmeter for measuring mass flow. The density of a fluid to be measured is obtained by detecting the oscillation period or oscillation frequency of a flow tube, through which the fluid to be measured flows, and using a function with at least two coefficients from the detected oscillation period or the oscillation frequency. At this time, at least two coefficients are obtained through the use of the oscillation period or oscillation frequency measured, by making only one known calibration fluid flow and a value determined commonly for each type of product, and the commonly determined value is corrected by variation factors based on individual products.
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