| 摘要 |
The invention relates to a technique for leak testing closed and filled containers, a method for producing closed and filled containers, and a leak testing apparatus. One aspect of the invention provides a method for leak testing at least one closed container, comprising applying a pressure difference across at least a part of the wall of the container, which part is to be leak tested, and monitoring the pressure on one side of the wall over a test time period as a leak indicative signal, and the method including: establishing a pressure reference signal; generating a dynamic signal range that represent an acceptable change across the part during the test period with respect to the pressure reference signal; monitoring whether a signal derived from the pressure monitored is, or is not, within the dynamic signal range; and enabling the signal derived from the pressure monitored to update the dynamic signal range, if the signal derived from the pressure monitored is within the dynamic signal range, thereby indicating the container to fulfill a predetermined condition of acceptable pressure change with respect to leakiness.
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