Patent ID: 6453721
Filing Date: 2002-09-24
Classification: G01F

Abstract:
A method of calibrating a fluid flow meter temperature compensator of a gas meter, said method comprising the steps of:(a) supplying a stream of compressed gas to a vortex cooling tube to generate a cold gas stream and a hot gas stream; (b) adjusting the pressure of the compressed gas such that the temperature of the cold gas stream reaches a desired first temperature test point and whereupon the temperature of the hot gas stream is established at a second temperature test point; (c) bleeding a portion of the hot gas stream from the hot gas port through a bleed valve to fine tune the temperature of the hot gas stream such that it reaches a desired second temperature test point; (d) maintaining the temperature of the cold gas stream within a temperature tolerance range having a span of equal to or less than eight degrees Fahrenheit; (e) subjecting the temperature compensator to the desired first temperature test point; (f) maintaining the temperature of the hot gas stream within a temperature tolerance range having a span of equal to or less than eight degrees Fahrenheit; (g) subjecting the temperature compensator to the desired second temperature test point, and (h) monitoring the temperature compensation provided by the temperature compensator during steps (e) and (g).