PCB Technical - Circuit board manufacturer: How to perform aging test and environmental test on instruments and meters?

Circuit board manufacturer: How to perform aging test and environmental test on instruments and meters?

An instrument frequently used in industry, after a certain period of use, will meet product aging, aging tests and environmental tests. It can detect a potential failure of the early documents, prepare solutions and solutions, especially common failures that can be found. Therefore, the same instruments and equipment were restored early by modifying the circuits and methods, which helped improve the durability and reliability of the tools.

1. Aging test:
In the general aging test, some instruments and meters are energized for a long time, and their average trouble-free working time is measured. The fault characteristics of these instruments and meters are analyzed and summarized, and their common problems are found to be solved. (PCB board)

2. Environmental test:
The environmental test generally determines the specific test content according to the working environment of the instrument, and conducts the test in accordance with the method prescribed by the state. Environmental tests are generally carried out on only a small part of the products. Common environmental test contents and methods are as follows:

(1) Temperature test. Temperature test is used to check the influence of temperature environment on instruments and meters, and to determine the adaptability of instruments and meters to work and storage under high and low temperature conditions. It includes high and low temperature load tests, and high and low temperature storage tests. High temperature test is used to check the influence of high temperature environment on instruments and meters, and to determine the adaptability of instruments and meters to work and store under high temperature conditions. It includes high temperature load test and high temperature storage test. Low temperature test is used to check the influence of low temperature environment on instruments and meters, and to determine the adaptability of instruments and meters to work and store under high temperature conditions. It includes low temperature load test and low temperature storage test. The temperature load test is to put the instrument in the temperature test box under the condition of unpacked, unpowered and normal working position, and carry out the test of the upper and lower limit working temperature for rated use.

(2) Vibration and shock test. The vibration test checks the stability of the instruments and meters subjected to vibration. The method is to fix the sample on a vibration table, and conduct tests in various vibration environments such as simulated fixed frequency (50HZ) and frequency conversion (5-2KHZ). After a cycle is completed within a certain frequency range, the inspection shall be carried out according to the regulations. For example, the zirconia oxygen content analyzer must avoid vibration and shock. Experiments have shown that the gas analysis instrument cannot work because the zirconium tube inside the zirconia probe is extremely vulnerable to vibration.

The impact test is used to check the adaptability of the instrument to withstand non-repetitive mechanical shocks. The method is to fix the sample on the test bench with a certain acceleration and frequency, and impact the sample several times in different directions. After the impact test, check whether the main technical indicators still meet the requirements and whether there is mechanical damage.

(3) Transport test. The transportation test is to check the packaging, storage, and transportation capabilities of the instrument. Method The sample is fixed on the test bench or can be installed on a truck to run. The specific method is in accordance with the relevant standards. The transportation test is based on the main technical indicators and performance of the prescribed detector.

Both the aging test and the environmental test are to check the reliability of the product. Generally, immediately after the PCBA processing process, there will be aging tests and environmental tests.