How to use air tightness detector for waterproof testing according to different ipx waterproof testing levels, and how to achieve rapid air tightness testing

Then first we need to divide the IP waterproof detection levels:

• IPX0 waterproof rating means no waterproof protection.No waterproof test is required.
• IPX1 waterproof grade equipment can provide waterproof protection equivalent to 3-5 mm/min rainfall for 10 minutes under normal operating conditions.
• The IPX2 waterproof level is basically the same as IPX-1, but it can be passed up by 15 degrees in all directions.Waterproof test。
• The IPX3 waterproof rating is splash waterproof protection at a 60-degree angle, providing waterproof protection at a flow rate of 10 liters/second for 2-5 minutes and a pressure of 80-100n/m.
• IPX4 waterproof level is basically the same as IPX-3, but can provide all-round and angle splash waterproof protection.
• IPX5 waterproof level provides all-round and angle waterproof protection, providing 2-3 minutes of 12.5 liters/second flow rate and 30n/m pressure waterproof protection.
• IPX6 waterproof level, high-wave waterproof protection, can last for 2-3 minutes against a depth of 3 meters underwater, a flow rate of 100 liters/minute, and a pressure of 100n/m.Many products adopt IPX6 waterproof test level, such as cameras, mobile phones, etc., all use IPx6 waterproof test for waterproof performance.
• IPX7 waterproof level can be submerged under 1 meter of water for 30 minutes.
• IPX-8 is completely waterproof and can be used continuously in water for a long time.

How to use the precision of Shenzhen HiraysiAir tightnessThe tester detects products with different waterproof level requirements:

• 1. Among them, waterproof grade IPX0, which does not have waterproof requirements, generally does not require testing.
• 2. IPX8 requires absolute waterproofing, so its sealing performance must be very high. Its testing method is relatively simple. When testing, you only need to pass the Hai Ruisi test.Air tightness testing equipmentEach time a quantitative, isobaric gas is provided to the sealing fixture for flushing, and through a certain pressure stabilization time, the fluctuations in the internal or surrounding air pressure are filtered out. After the air pressure is stabilized, we only need to observe the changes in air pressure or gas volume through the air tightness testing equipment, and we can easily get the test results (OK or NG) and intuitively see the amount of gas leakage. The key point of this test is to ensure that the positive pressure or negative pressure provided for each test is absolutely the same pressure and volume for precision testing, and to achieveIPX8 waterproof testLevel testing.
• 3. The waterproof levels of IPX1--IPX7 are increasing. The larger the mantissa, the higher the waterproof test requirements. However, these waterproof levels are qualified for leakage within the scope allowed by the standard. At this time, the requirements for Hai Ruisi precision air tightness testing equipment are: the test precision and sensitivity must be high.Waterproof testerThe sampling frequency of the device must be high so that it can be accurately determined whether the air leakage rate is within the allowable range of the standard.
• 4. IPX1--IPX7 waterproof levels have different methods for simulating water splashing and immersion in the laboratory. However, when using Shenzhen Hiraysi's precision air tightness detector for non-destructive gas leak detection, the testing methods are similar. The difference is that the allowable leakage value and test pressure are different.
• 5.Air tightness detectorThe test methods are all by adjusting different test pressures and test times. (Usually the range of test air pressure is: negative pressure 0-100KP, positive pressure 0-700KP.) Whether through positive pressure or vacuum extraction, when the established test pressure is reached, the voltage stabilization process begins. The function of voltage stabilization is to filter out pressure fluctuations and prevent misjudgment of test results. Only after voltage stabilization does the actual operation begin.Air tightness testing, at this time, the precision air tightness detector performs high-frequency sampling based on the attenuation of its pressure, changes in volume, etc. through the 24-bit A/D conversion of the sensor, and transmits the sampling data to the 32-bit CPU. The CPU calculates the test results of the tightness of the surveillance camera under test based on the established test conditions (the test pressure and time are absolutely different for different waterproof levels).In angerTightness testerThe results can be displayed intuitively on the display screen.
• 6. Before testing, first select positive pressure, negative pressure or mixed pressure testing according to different products to be tested. For example: IP waterproof testing of speakers. If the positive pressure is too high, the speaker membrane may be damaged. At this time, we need to choose negative pressure or choose an appropriate positive pressure. Usually the positive pressure will not exceed 100KP.
7. After confirming the above two points, you need to choose a suitable sealing fixture. The so-called suitable sealing fixture is that the cavity of the air tightness detector fixture is the same or as close as possible to the outer dimensions of the product to be tested, because the higher the waterproof level, the leakage amount of the micro-leakage must be calculated.In principle, the more precise the fixture of the air tightness testing equipment, the more accurate the test results will be. To use a simple analogy, if a little water is dropped into a bowl of water, it is difficult to see the change in its volume. However, if the same drop of water is dropped into a small test tube, its volume will change significantly.Therefore, the more precise the fixture of the air tightness tester, the more precise the test results will be.
• 8. After selecting the appropriate sealing tester fixture, you can then proceed to the normalAir tightness testOkay, the testing principle is the same as point 5 above, so I won’t repeat it one by one.You only need to judge whether the condition meets the corresponding waterproof level requirements based on OK or NG on the display screen of the precision tester.
• 9. Of course, these are just ordinary testing principles and methods. Because the sealing structure of the product is different, more judgment conditions are used during testing, which must be limited based on actual experience. For example, the volume of an endoscope capsule is the same as that of a common cold capsule, but after the internal assembly, the excess space is only 0.5ML, that isEven in the case of a large leak, the amount of leakage is minimal. Therefore, in the ordinary test method, many conditions such as the conditions for large leak detection, the upper limit of air intake, the lower limit of air intake, the leakage rate, and the excess volume of the fixture for accurate air tightness testing equipment must be added.