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How to correct the Reynolds number through the secondary meter
Implementation in the flow sensor (transmitter) The correction of the Reynolds number effect described above is in the flow secondary table Completed in the measurement system for the vortex flowmeter itself without correction capability. As computer technology penetrates into traffic once Table, some vortex flowmeters themselves also have this correction function. For example, Yokogawa's YF100 series E-type vortex flow In the gauge, this correction is achieved with a 4-segment polyline. The abscissa of the broken line is the vortex frequency factory, and its ordinate is the correction coefficient. A, correction value Correction value and vortex frequency In the example shown in the table, the characteristic point frequency fi can be obtained from the flow value g in Table 8.3: Fi=q, zK. Where q, i - volume flow. L/h or m3/h; K. - Flow coefficient, PlL or P/rri3 (1P = 0.1 Pa.s). Then fill in the frequency of each point and the corresponding correction value into the vortex flowmeter (transmitter) menu (Articles D21 to D30). And specify "1" (execution) in the "REYNOLDS ADJ" (Reynolds number correction) item. After the meter is running, the Reynolds number can be set. For the flow coefficient K. The effect is automatically corrected as follows. K (= AK. Where K: - corrected flow coefficient, P / L or P / lT13; A-correction value; K. - Uncorrected flow coefficient, PlL or P/rri3.