Patent ID: 6082169
Filing Date: 2000-07-04
Classification: G01F

Abstract:
Process for the detection of malfunction of a water meter and for evaluation of the duration of said malfunction, comprising the steps of:measuring the mean flow rate of each unit of volume detected following the preceding unit of volume,comparatively analyzing this mean flow rate at two limit flow rates which are a first flow rate corresponding to minimum normal operating flow rate of the meter and a second flow rate corresponding to the minimum operating flow rate of the meter when the meter is operating in a submarine mode,computing, when a mean flow rate is detected higher than the first flow rate, the ratio between the sum of the units of volume (V1) counted between the first and the second flow rates and this said sum to which is added the sum of the units of volume (V2) counted at flow rates higher than the second flow rate,starting a clock when this ratio is below a threshold of submarine operation and stopping said clock when the ratio is again higher than this threshold of submarine operation.