Criteria and purpose of high temperature aging test

Date：2022-09-20 15:02:54 Views：1654

Aging test is mainly a high-intensity test to simulate various harsh conditions of products in the actual use process. At the same time, it can reasonably predict the service life of products according to the use requirements. High temperature aging test is also used to determine the adaptability of products to storage, transportation and use under high temperature climate conditions. The severity of the test depends on the high temperature and exposure duration.

Purpose of high temperature aging test

High temperature aging test is a reliability test for high-performance electronic products (such as computer machines, automotive electronic products, power supplies, motherboards, monitors, etc.) to simulate high temperature and harsh environments. It is an important means to improve product stability and reliability, and an important production process for manufacturers to improve product quality and competitiveness.

Criteria for high temperature aging test

1. Temperature rise time test

Place the temperature sensor at any point in the working space of the high temperature aging test chamber, heat it with full power, and record the time when the temperature of the working chamber rises from room temperature to the highest working temperature for the first time. The result shall not exceed 120min.

2. Surface temperature test

After the working temperature of the high temperature aging test chamber reaches the maximum working temperature for the first time and stabilizes for 2h, use a thermometer to test the surface temperature of the chamber. If the maximum working temperature of the test chamber does not exceed 200 ℃, the surface temperature should not exceed room temperature plus 35 ℃; When the maximum working temperature exceeds 200 ℃, the surface temperature shall be determined according to the formula.

3. Insulation resistance test

The test shall be carried out according to the method specified in Article 6.2 of GB99 8, and the results shall conform to the insulation strength test of 1500V, 50H AC for 1min for the case when the electric heater terminal (including lead) and the control system are open circuited, and the insulation shall not be broken down.

4. Insulation strength test

The test shall be carried out according to Clause 6.3 of GB998, and the test results shall meet the requirements. When the electric heater terminal (including lead) is open circuited with the control system, the insulation strength test of the box shell shall withstand the voltage of 1500V, AC 50H for 1min, and its insulation shall not be broken down.

5. Noise test

The test is conducted according to the method specified in ZBN61012, and the noise of the whole machine is not higher than 70dB (A).

After high temperature aging under specific test conditions, measure the electrical parameters of the aging object, screen and remove the deteriorated or failed components, and try to eliminate the early failure of the product before normal use. In order to improve the reliability of electronic and electrical products and extend the service life of products, it is the principle of high temperature aging to conduct necessary assessment on the stability of products so as to eliminate potential "individuals" (components) with "premature death" defects and ensure the overall quality and expected life.

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