Patent ID: 9377374
Filing Date: 2016-06-28
CPC Classification: G01M,G05D

Claim Text:
1. A method of leak testing a device under test (DUT) comprising the steps of: a. filling the DUT with a fluid to a predetermined pressure using a first regulator and a first valve disposed in series between a source of the fluid and the DUT; b. measuring with a high accuracy flow controller a measured flow waveform; and c. calculating with a microprocessor a leak rate for the DUT in dependence upon at least the measured flow waveform; wherein at least one of a first set of characteristics and a second set of characteristics were established using a process comprising the steps of: automatically operating a leak test system comprising at least an absolute test pressure sensor measuring the fluid pressure in proximity to the DUT, the high accuracy flow controller for controlling fluid provided to the DUT, and a controller processing the output of the absolute pressure sensor to generate a setting for the high accuracy flow controller; automatically executing a predetermined subset of test sequences of a plurality of test sequences with the leak test system; storing in a memory associated with a computer a plurality of measurements taken during each test sequence of the predetermined subset of test sequences of a plurality of test sequences; automatically determining in dependence upon a predetermined portion of the plurality of measurements at least one characteristic of a plurality of characteristics, each characteristic relating to at least one of the leak test system, the DUT, and an overall test time for performing a leak test to a predetermined specification.