METHOD OF DETERMINING LEAKAGE IN ARTICLES Russian patent published in 2011 - IPC G01M3/00 

FIELD: physics.

SUBSTANCE: article is put into an accumulation volume. Initial concentration of the control gas in the accumulation volume is measured using a control gas indicator. The article is filled with control gas until excess test pressure. The article is kept under excess test pressure of the control gas for a given period of time. Final concentration of the control gas in the accumulation volume is measured using the control gas indicator, and the degree of air-tightness of the article is determined from the difference between the final and initial concentration of the control gas in the accumulation volume. Before filling the article with control gas to excess test pressure, an air sample is taken from the accumulation volume into an additional closed standard volume. Initial concentration of the control gas in the accumulation volume is measured using a control gas indicator after measuring the final concentration of the control gas in the accumulation volume, while measuring concentration of the control gas in the air sample collected from the accumulation volume into an additional closed standard volume. The degree of air-tightness of the article is determined based on the measured value of concentration of the control gas in the air sample collected from the accumulation volume into the additional closed standard volume and is calculated using a mathematical relationship given in the formula of invention.

EFFECT: high accuracy of controlling air-tightness of articles.