Patent ID: 6721674
Filing Date: 2004-04-13
Classification: G01F

Abstract:
Method for in-situ calibration of quantity measurement of a fluid flowing in a channel, wherein the volume of the fluid flowing through is measured in a measuring means, wherein the measuring means of the volume of the fluid is disconnected from the fluid flow, measuring fluid is accumulated in a certified and pre-determined amount on site of the calibration, this certified and pre-determined amount of measuring fluid is led through the measuring means with a pre-determined volume flow, in the course of which the volume values measured by the measuring means are saved, then the measured volume values and the predetermined values of the fluid led through is compared to each other and, with this, the quantity measurement of the flowing fluid is calibrated, and wherein the measuring fluid is led through for more than one time, preferably under different flow velocities and flood wave shapes covering a whole measuring range of the measuring means, wherein a velocity range of the change of the volume flow of the flowing fluid permitted for the given measuring means in the given measuring arrangement is determined by experiments before start of the calibration.