The vacuum decay method is a test method used to detect micro-aperture leaks, which is suitable for detecting the micro-pore size of packaging materials, such as vials, etc. In this method, the packaging material is placed in a vacuum environment and the pressure inside the package is observed to determine whether there is a leak.
In the vacuum decay test, the packaging material to be tested is first placed in a vacuum chamber, and then the pressure in the vacuum chamber is reduced to a certain value by vacuuming. Subsequently, pressure sensors are used to monitor the pressure changes inside the package. If there is a micro-pore leak, the gas will diffuse from the inside of the package through the leak aperture into the vacuum chamber, resulting in a gradual decrease in pressure inside the package. By monitoring and recording pressure change data, it is possible to determine the presence and extent of leaks.
The advantage of the vacuum decay method for testing vials for micro-pore leaks is its non-destructive and high sensitivity. The method does not cause damage to the sample being tested and is able to detect small pore size leaks. In addition, the vacuum decay test results are accurate and reliable, and can be widely used in the detection and control of packaging materials.
It is important to note that vacuum decay test results may be affected by factors such as test environment, temperature, type and thickness of packaging material. Therefore, when the LEAK-S1 vial micro-pore leak tester is tested, it is necessary to select the appropriate test conditions and parameters, and make a reasonable analysis and interpretation of the test results.
The steps to test vials for micro-pore leaks using the vacuum decay method are as follows:
a. Prepare test equipment: LEAK-S1 vacuum attenuation method vial micro-aperture leak tester, vacuum chamber, pressure sensor, vial to be tested, etc.
b. Put the vial to be tested into the vacuum chamber to ensure that the cap is well sealed.
c. Start the vacuum pump to pump the pressure in the vacuum chamber to a certain value.
d. Turn on the pressure sensor to monitor the pressure change in the vacuum chamber.
e. Observe and record the pressure change data, analyze the data change trend, and judge whether there is a small pore size leakage.
f. If there is a leak, analyze the extent of the leak and determine whether it needs to be treated or the packaging material needs to be improved.
g. After the test is completed, turn off the vacuum pump and pressure sensor, and clean the test equipment.
It should be noted that when using the vacuum decay method to test for micro-pore leakage in vials, it is necessary to select appropriate test conditions and parameters, such as vacuum pressure, test time, etc. In addition, to ensure the accuracy and reliability of the test results, multiple tests need to be performed and averaged. At the same time, it is also necessary to pay attention to the influence of factors such as temperature and humidity of the test environment.