[Favorite] An article to understand the accuracy of the air tightness tester and selection guide

What is airtightness testing?

Imagine what would happen if a car tire, a medical syringe or a pressure cooker at home leaked. It would be an anti-human experience or lead to a safety accident.Airtightness testing equipmentIt is an important line of defense to ensure the safe use of these products in everyday life.Airtightness testing plays the role of guardian in many fields such as home appliances, automotive, medical devices and aerospace.

So how does its accuracy affect the test results? Let's find out.

I. Basic concepts of airtightness testing

Gas-tightness testing is the use of specific methods to check for leaks in containers, piping, or other airtight products. Common testing methods includePressure decay testing, vacuum testing and helium detectionetc. TheirThe basic principle is to measure the leakage rate or the amount of leakage using pressure changes or special gas permeation.

Imagine a balloon with small holes, the air would slowly leak out and the balloon would not stay inflated.Airtightness testing equipmentWhat is done is to measure these small hole defects to ensure that the product does not leak during use.

Ⅱ.Airtightness Testertypes of

There are several mainstream on the marketleak detectorThe main ones arePositive Pressure Airtightness Tester,Negative Pressure Airtightness Tester,Volumetric Quantitative Airtightness Testercap (a poem)Differential Pressure Airtightness Testeretc. They work differently and have different application scenarios.

for examplepositive pressure detectorIt is to inject compressed air or gas into the product to be measured, and judge the airtightness by the pressure change;Negative Pressure DetectorInstead, a vacuum is drawn and then the sealing effect is checked by pressure changes;Volume Quantification TesterMeasurement is carried out using the principle of the volumetric method, while the differential pressure tester detects small leaks using the principle of the differential pressure method.

Enterprises can choose the right type according to the actual needs when purchasing.

III. Accuracy and error

Precision refers to theAirtightness testing equipmentThe degree of accuracy of the measured data.However, it is inevitable that any instrument will have some errors, mainly from the instrument itself, the reading process and environmental influences.

In order to improve the accuracy, the manufacturer will carry out precision calibration of the instrument, and the user's side also needs regular maintenance and repair. At the same time, good control of temperature and humidity and other environmental factors will also help to reduce errors and improve detection accuracy.

Standard leakage orifice: 1(±5%) ml/min Accuracy, 500kPa pressure.Differential Pressure Leak DetectorPassing the validation

IV. Precision indicators

judge (a competition)Airtightness TesterThe main indicators of accuracy are:

- Full Scale Error (F.S.):Error at full scale

- Reading error (%rdg):relative error value

- Resolution:The smallest value that can be distinguished

- Repeatability:Consistency of results from repeated measurements of the same product under the same conditions

- Stability:Fluctuation of measurement data under long-term use

The better these indicators are, the more accurate and reliable the measurements will be.

An excellentairtightness leak detector, these metric values are quite good, for example JC-C10005 Differential Pressure Leak TesterThe test accuracy is within 0.075%F.S., the repeatability and stability are very good, naturally the measured data is more accurate and reliable, which is key to ensure the airtightness of the product.

v. technological advances

Airtightness testing technology is also advancing. Automated testing, wireless data transmission and intelligent diagnostics have been realized, which can significantly improve testing efficiency and convenience.

For example, by utilizing the self-developed automatic pressure calibration technology, Precision Engineering can complete the automatic pressure calibration of the leak detector without manual participation, ensuring the traceability and authority of the detection data. After docking the wireless gateway and data management system, the remote real-time monitoring of data can be realized.Through the network mapping, you can control the instrument on PC screen, which can truly realize the intelligent management of the whole process of testing.

VI. Practical applications

Airtightness testing is becoming more and more widely used in new energy, household appliances, automotive parts, consumer electronics, medical devices, security lighting, valves and piping, wire connectors, and other industries, for example:

In the automotive industry to test the sealing of the body, engine, gas tanks, etc.; aerospace field to test the airtightness of the body and components to ensure flight safety; home appliance industry to test the airtightness of refrigerators, air conditioners, and other condensate tube parts; medical equipment industry to test the sealing of respiratory machines, hemodialyzers and other equipment. ......

The importance of this can be seen to be self-evident.

VII. Guidelines for selection and use

in choosingAirtightness testing equipmentWhen considering the test range, accuracy index, automation degree, non-standard customization ability and after-sales service and other factors.

Imported brands such as ATEQ have mature technology and superior precision, but are expensive; for local Chinese manufacturers, the national brand JCGK is more cost-effective and can provide personalized customization services, which are more in line with the actual needs.

in usingairtightness leak detectorWhen the instrument is operated, it should be operated according to the instruction manual, warming up the cold machine first, cleaning the connector, adjusting the measuring range, and doing the anti-vibration pad protection, and so on. Regular maintenance and calibration are also indispensable to maximize the performance of the instrument.

VIII. Future prospects

With the growth of industrial automation and the Internet of ThingsAirtightness testing is bound to evolve in the direction of intelligence, unmanned and integration.New technologies such as sensor arrays, big data analytics and cloud-based management will be widely used, theMake the inspection process more accurate, efficient and intelligentThe
In the future, JCGK and other national brands will continue to increase R & D efforts, and continue to break through the key detection technology, for the Chinese manufacturing industry to protect the quality of products!

Summarize

Airtightness testing is critical to ensure product reliability and safety. Accuracy, on the other hand, is a key indicator of the ability of the testing instrument. It is hoped that through the introduction of this article, you can better understand the airtightness testing technology and provide reference for the selection and use of leak detectors.

If you encounter any problems when performing airtightness testing, please consult withAirtightness TesterManufacturers or professionals such as Precision Engineering Airtight.