Electronic products in the development and manufacturing process may have various factors that lead to the appearance of defects. Some defects of electronic products can be eliminated by traditional inspection methods. However, these common methods cannot detect potential defects. Here, we need to conduct the experiment with a light house. To a certain extent, early failure and exposure to the design and manufacturing process of components and components can be eliminated by using a temperature effect room to conduct experiments on electronic products. The reliability of the product corresponds to the actual requirements, thus improving the reliability of electronic products.
Basic heating system
1. Selection criteria for temperature analysis
In general, electronic products that can be used in case of sudden changes in air quality must be seen from the room of the fire. In addition, the greenhouse is also an environmental research tool. It is used to achieve the goal of triggering the offense. Thermal shock refers to exposing the product to a high temperature zone and a low temperature zone sequentially within a limit of 1 min and as a certain number of cycles. In general, the goal is to uncover safety issues and potential defects in products that have high temperature fluctuations.
2. Heat shock test to determine condition
Basics of experience
Experimental temperature. The test conditions of the shock chamber must clearly reflect the expected implementation of the product.
The process of decision is as follows:
The test temperature response from the high and low test is used to determine the test conditions.
Based on the expected performance of the product and the relevant weather data of the storage area.
High duration and low temperature.
- The duration of the summer is high
Similarly, the time at which the product reaches temperature stability under high temperature storage conditions is determined. On the other hand, the time at which the product reaches the highest operating response temperature is determined during the daily cycle.
- The duration of summer is low
The low temperature period is determined by whether the product has reached a period of stability at the low temperature range.
Cycle time
Only one thermal shock test can be performed for products with low temperature fluctuations. However, three or more shock tests have been performed on products with rapid temperature changes. The number of power packs is determined by the number of expected working hours.
Test requirements for thermal shock
1. Temperature control is required
Any activity other than running the model can affect the results of the shock test. For example, opening the door of the room during an irregular period causes a large change in the temperature of the sample or the temperature of the room temperature (the temperature exceeds 2 ℃). Before proceeding with the temperature analysis test, it is important to ensure that the sample is adjusted to the specified temperature.
2. Assess internal control requirements
If the break occurs before the temperature changes, the heat shock test will be done through the break and return the sample to that state. If a break occurs during the transition from high to low temperature, the sample must be returned to the temperature before the transition.
