Patent ID: 8402817
Filing Date: 2013-03-26
Classification: B67D,G01M

Abstract:
1. A system which monitors for leaks in a vapor recovery system of a fuel dispensing system including an underground storage tank and a plurality of dispensing points in fluid communication with the underground storage tank, the system comprising: a controller which continuously monitors the vapor recovery system for leaks by monitoring the vapor recovery system for a quiet time period wherein there is the absence of external changes to vapor recovery system; recording pressure data during the quiet time period; and determining whether the vapor recovery system contains a leak based on the recorded pressure data of a plurality of spaced apart independent quiet time periods, wherein the controller classifies each of the plurality of spaced apart independent quiet time periods as one of positive and negative and determines that the vapor recovery system contains the leak based on a measure of the number of quiet time periods classified as negative and the number of quiet time periods classified as positive.