What is high and low temperature environment test? What tests are applicable to the high and low temperature test chamber?

Date：2023-02-28 16:03:45Views：427

What is high and low temperature environment test? High and low temperature test is a method to determine the adaptability of products to storage, transportation and application under high temperature or low temperature climatic conditions. The severity of the experiment depends on the temperature of high or low temperature and the duration of exposure. Basically, all products are stored in a certain temperature environment, or work and run. The temperature in some environments will change continuously, from high to low. This article has collected and collated some materials, hoping to be of great reference value to all readers.

High and low temperature cycle test

Generally speaking, it is a multiple of days. The common ones are 72H and 96H. It should be noted that there are fewer or higher requirements for different time. It is generally 72,96H.

High and low temperature environment test standard:

GB_ T 2423.2-2008 Environmental Testing for Electric and Electronic Products Part 2: Test Methods Test B: High Temperature

GBT 2423.1-2008 Environmental Testing for Electric and Electronic Products Part 2: Test Methods Test A: Low Temperature

IEC 60068-2-2 Basic environmental test procedures Part 2-2: Test B: Dry heat

IEC 60068-2-1:2007 Environmental tests for electrical and electronic products: low temperature

Scope of application

Electronic, component, circuit board, communication, LED, LCD screen, instrument, capacitor, vehicle, medicine, plastic, metal, chemical, building materials and other industrial products.

The high and low temperature test chamber can mainly carry out the following items:

(1) High temperature experiment

Experiment purpose: used to check the adaptability of the test sample to storage or use under high temperature conditions. Instruments and equipment used for operation under high temperature environment such as tropical weather or steel making plant.

Experimental equipment: high and low temperature (damp and hot) experimental chamber.

Experimental conditions: generally select a stable temperature stress and holding time.

Preferred common temperature: 200 ℃, 175 ℃, 155 ℃, 125 ℃, 100 ℃, 85 ℃, 70 ℃, 55 ℃, etc;

The preferred experimental time is: 2h, 16h, 72h, 96h, etc.

(2) Low temperature experiment

Experiment purpose: used to check the adaptability of the test sample to storage or use at low temperature. It is often used in the type test of products at the development stage and the selection test of components.

Experimental equipment: high and low temperature (damp and hot) experimental chamber

Experimental conditions: generally select a stable temperature and experimental time.

The preferred common temperatures are: - 65 ℃, - 55 ℃, - 40 ℃, - 25 ℃, - 10 ℃, - 5 ℃,+5 ℃, etc;

The preferred experimental time is: 2h, 16h, 72h, 96h, etc.

(3) Rapid temperature change experiment

Experiment purpose: rapid temperature change is a temperature change with regular temperature change rate, which often simulates the regional environment with large temperature difference between day and night. It can also be used for life test to evaluate the appearance, mechanical function and electrical function of components or products.

Test equipment: fast temperature change test box.

Test conditions:

1) High and low temperature value of temperature change scale;

2) Retention time of sample at high and low temperature;

3) Temperature change rate from low temperature to high temperature or between high temperature and low temperature;

4) Number of conditional test cycles.

(4) Temperature shock test

Test purpose: used to evaluate the adaptability of the product to rapid changes in ambient temperature. The intention of the thermal shock experiment is fundamentally the same as that of the temperature cycle experiment, but the conditions of the thermal shock experiment are much more severe than those of the temperature cycle experiment.

Test equipment: two cold and hot shock test boxes and three cold and hot shock test boxes.

Test conditions:

1) High and low temperature value of temperature change scale;

2) Retention time of sample at high and low temperature;

3) Change time from low temperature to high temperature or from high temperature to low temperature;

4) Number of conditional test cycles.

(5) Stable temperature and humidity test

Experiment purpose: check the adaptability of the product to use and store under humid and hot conditions, observe the impact of the experimental sample under stable temperature, no condensation, and high humidity at regular times, so as to speed up the evaluation of the effect of the experimental sample's resistance to humid and hot deterioration.

Experimental equipment: constant temperature and humidity box.

Experimental conditions: experimental temperature; Test humidity; Experiment time.

Preferred common temperature/humidity: 40 ℃, 85%; 40 ℃, 93%; 85 ℃, 85%, etc;

The preferred experimental time is 48h, 96h, etc

(6) Temperature and humidity cycle test

Experiment purpose: It is applicable to determine the adaptability of the application and storage of the experimental sample under the humid and hot conditions of temperature cycle change and condensation on the surface.

Experimental equipment: high and low temperature (damp and hot) experimental chamber.

Test conditions: select temperature, humidity, cycle times, temperature change rate and duration.

High and low temperature environment test cost

The price of high and low temperature test is quoted according to the test duration. Different size products use different size temperature boxes, and different size temperature boxes have different test prices, which are calculated according to the duration.

The above is the relevant content of high and low temperature test organized by the core breaking test team. I hope it can help you. Our company has a team of professional engineers and industry elites, and has three standardized laboratories with an area of more than 1800 square meters, which can undertake various test projects such as electronic component testing and verification, IC authenticity identification, product design and material selection, failure analysis, functional testing, factory incoming material inspection and tape weaving.