CALIBRATION AND TESTING OF 2- AND 3 1/2-IN. MAGNETIC FLOWMETERS FOR HIGH-TEMPERATURE NaK SERVICE

摘要

High-temperature calibration tests were made involving 12 magnetic flowmeters of 2-in. sched-40 pipe size and 12 magnetic flowmeters of 3£-in. sched-40 pipe size with NaK as the flow medium. Ten of each type of unit were calibrated against a venturi water-calibrated to an accuracy of 0.25%, over periods of operation to 3000 hr. The two remaining units of each type were not operated, but the magnet air gap flux density was monitored to detect changes for comparison with the operated units. The results of the calibration are tabulated and discussed.nBackground material on magnetic flowmeter application, design, and theoretical principles from the literature is included.