| 摘要 |
The invention relates to a system for monitoring systems, which in turn monitor the impermeability of a hollow body. A test body (2), which generates a defined increase in pressure in a measuring chamber (4) over a predetermined time period, is used in the system in place of the hollow body. Said defined increase in pressure corresponds exactly to the pressure increase generated by a hollow body with negligible leakage, the hollow body being thus recognised as leakproof. The test body can be configured as a glass capillary, which runs in a sealed manner between two chambers at different air pressures. Alternatively, the test body can consist of a substance, which during storage absorbs moisture from the ambient atmosphere in a defined manner. A vacuum created around the body removes moisture from the test body and said moisture evaporates at least partially in the vacuum, causing in turn an increase in pressure in the chamber. This pressure increase corresponds to the increase in pressure that is still acceptable for a hollow body to be tested.
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