公开(公告)号：JPH02227614A

公开(公告)日：1990-09-10

申请号：JP33806189

申请日：1989-12-26

Applicant: CONOCO INC

Inventor： BIRII REI ADONII ,  CHIYAARUZU DABURIYU ARUWAASU ,  JIYON BII DAAKII ,  BURAISU TEII JIEFURIIZU

IPC: G01F1/86 ,  B60J10/00 ,  G01F1/00 ,  G01F1/78 ,  G01F23/14

Abstract: PURPOSE: To make it possible to accurately measure the flow rate of mass by setting the minimum deviated pressure in a vertical vessel, fully filling liquid in the vessel against the minimum set pressure, and monitoring the change of the mass at a measuring time interval. CONSTITUTION: First controllers 20 to 22 program to fully fill liquid in a cylinder (vertical vessel) according to need, measure set head change, integrate flow signals from a flowmeter FI and transmitter FT, calculate and output a correction coefficient, calculate correct flow rate, supply a flow control signal to a flow control valve 78 via a relay 14, supply a level signal to a level controller 23, and refill a column via charging valves 4, 5 in next cycle. In this case, the comparison of the column reference flow rate with the integrated flow rate from the flowmeter FI/transmitter FT is conducted by the controller 21. The control of the flow rate of the liquid is conducted by the controller 22.