초록 ▼

In order to improve existent methods for measuring the sealing of tanks (1), the temperature (q1) of the tank is measured when taking up a magnitude relative to the pressure (p) representative of a leak. A predetermined magnitude relative to a limit pressure (pG) to decide whether a tank fulfils the

In order to improve existent methods for measuring the sealing of tanks (1), the temperature (q1) of the tank is measured when taking up a magnitude relative to the pressure (p) representative of a leak. A predetermined magnitude relative to a limit pressure (pG) to decide whether a tank fulfils the required sealing conditions at a temperature (q2) is calculated for a measurement temperature (q1); the actual pressure value and the limit or ultimate pressure value at this measurement temperature (q1) are then compared. Thereby, pressure variations due to temperature variations are taken into account.

대표청구항 ▼

A method for leak testing containers, comprising the steps of: bringing a container into a pressure measuring unit; measuring a pressure value inside said container; brining said container out of said pressure measuring unit; and comparing said pressure value with a predetermined limit pressure valu

A method for leak testing containers, comprising the steps of: bringing a container into a pressure measuring unit; measuring a pressure value inside said container; brining said container out of said pressure measuring unit; and comparing said pressure value with a predetermined limit pressure value to determine whether said container is to be considered tight or leaky; wherein a temperature difference between a temperature of the determination of the limit pressure value and a temperature at the measurement of said pressure value, is taken into account, comprising the further steps of: measuring heat radiation of said container at least one of before and after it is brought into said pressure measuring unit; determining a time-span between a time at said measuring of said heat radiation and a time at said measuring of said pressure value; determining said temperature at the measuring of said pressure value from values of said measuring of said heat radiation, said determination of said time-span, and a heat radiation characteristic of said container versus time; comparing said pressure value and said limit pressure value; correcting one of said pressure value, said limit pressure value and a comparison of said pressure value and said limit pressure value from a temperature-relative value corresponding to the determined temperature and a temperature according to said heat radiation measured.