in order to avoidAir tightness detector testIn the case of unqualified air tightness, we need to learn how to judge whether the air tightness detector is leaking and how to test the air tightness detector.Next, let’s take a look at its testing principle.

The principle of the air tightness detector: the instrument inputs compressed air with accurate pressure control into the test piece or test tooling, and then automatically shuts off the inflated air source. The solenoid valve accurately controls the air flow balance for the specified time, and then turns off the balancing solenoid valve (eliminating the fluctuation of air pressure). The air tightness test is based on subtle changes in air pressure in the test piece or test tooling. The attenuation of the pressure is measured within the specified time, and then the pressure drop caused by the actual leakage of the test piece is obtained through temperature compensation, thereby determining whether the test piece is leaking.

The air tightness of the specimen is one of the important factors to ensure the success and accuracy of the experiment.The main reason is that the internal space of the air tightness testing instrument must be small enough, otherwise the internal volume will reduce part of the air pressure fluctuations, thereby affecting the air tightness testing accuracy. The air tightness testing instrument of Shenzhen Hiraysi has less than 1.5cc, which is enough to ensure the measurement, stability and accuracy requirements.

Another important factor is that the detection tooling must be precise. If the detection tooling is not precise enough and the space is too large, such a small leakage cannot be accurately detected, because the internal space will eliminate part of the air pressure fluctuation, just like a little water flowing from the sea and the sky.Then the changes in the sea are too subtle, but if a drop of water leaks from a small container, its changes are very obvious. Therefore, the testing tooling of the air tightness detector must be precise, otherwise the air tightness testing effect will not be very ideal.

This article originates from Hiraysi Automation: Hiraysi Automation (http://www.hirays.com) Equipment pioneer focuses on sealing testing equipment and air tightness testing equipment such as mobile phone waterproof testing, camera waterproof testing, IP waterproof level testing, wire waterproof testing, speaker waterproof testing, etc.