利点
- High Precision
- High Resolution
- Fast Test
- Repeatability
詳細
The differential pressure method is to compare the product under test to a reference sample. During the test, both samples are filled to the same pressure.
The test cycle is divided into three phases:
- FILLING (time T1): the product being tested is subject to the programmed rated test pressure.
- SETTLING (time T2): the equipment waits for the pressure to settle in the product being tested.
- LEAK MEASUREMENT (time T3): it is measured by the difference in pressure between the test piece and the reference sample: a pressure drop inside the test piece, caused by a leak, makes the pressure difference measured increase.
The system accuracy is about 0.1 cm³/min. It is preferable to use as masterpiece, a similar object to the tested one in volume and features; in this case, the settling of the objects will be very similar.
It will be possible to obtain a significant settling time reduction, measuring the leak for comparison between the two parts, which behave in a very similar way.
