The constant temperature and humidity high and low temperature test chamber is a widely used equipment for product environmental adaptability testing. It can simulate different temperature and humidity environments to help test and evaluate the performance of materials, components, and equipment in extreme environments.

It is widely used in industries such as electronics, electrical, automotive, aerospace, home appliances, materials, etc., for product quality testing, research and development verification, and reliability testing. It is crucial to understand and master the usage method of the constant temperature and humidity high and low temperature test chamber in order to ensure the accuracy of the experiment and the long-term stable operation of the equipment. This article will provide a detailed introduction to the usage and operation process of the device.

1 Preparation work

Before officially using a constant temperature and humidity high and low temperature test chamber for testing, some preparation work should be done first to ensure that the equipment can operate normally.

• Check the power supply and grounding

Before starting the test chamber, the first thing to check is whether the power supply voltage is stable and meets the equipment requirements. The constant temperature and humidity high and low temperature test chamber needs to be grounded to ensure safe operation. The stability of the power supply is crucial for the normal operation of the equipment, as high or low voltage can cause damage to the equipment.

• Check the water source and drainage system

If the test chamber requires humidification function, check whether the water tank has enough water and ensure that the water quality meets the requirements. The drainage system of the equipment should be unobstructed to avoid water accumulation and system failure.

• Confirm the installation of the test sample

Place the test sample in the testing chamber to ensure its proper positioning. The placement of samples should ensure even distribution of insulation and humidity to avoid inaccurate test results due to improper positioning.

• Set temperature and humidity parameters

Set the temperature and humidity range according to the testing requirements. The constant temperature and humidity high and low temperature test chamber can usually adjust the temperature range from -70 ℃ to+150 ℃, and the humidity range is generally 20% to 98%. When setting up, the testing range for temperature and humidity should be determined based on the environmental conditions of the product’s use.

2 Operation method

After ensuring that all equipment and test samples are ready, formal testing operations can proceed. Here are some key operational steps and precautions:

• Select experimental mode

The constant temperature and humidity high and low temperature test chamber usually has different test modes, including temperature cycling mode, constant temperature and humidity mode, temperature and humidity alternating mode, etc. Select the appropriate mode according to the testing requirements. For example, the temperature cycling mode is suitable for testing the adaptability of products under temperature changes, while the constant temperature and humidity mode is suitable for conducting long-term stability tests on samples under stable environmental conditions.

• Set temperature and humidity parameters

Set the desired temperature and humidity values on the control panel. When setting up, consideration should be given to the product’s usage conditions. For example, automotive components may need to be tested within the range of -40 ℃ to+85 ℃, and electronic devices may need to be tested in a relatively mild environment (such as stable conditions of 25 ℃± 5 ℃).

• Start the experiment

After setting the temperature and humidity parameters, start the equipment for testing. At this point, the device will automatically adjust the environment according to the set temperature and humidity change pattern, and conduct simulated environmental adaptability testing on the test samples. During the testing process, real-time monitoring of temperature and humidity changes can be achieved through the device’s display screen.

• Temperature and humidity change control

Ensure that the temperature and humidity change rate of the equipment meets the standard requirements during testing. A change rate that is too fast or too slow can affect the accuracy of the test results. Usually, the device will set a reasonable temperature and humidity change rate (e.g. a change rate of 5 ℃/min or 0.5 ℃/min).

• Test cycle and time setting

Set the testing cycle and time according to the testing requirements. For example, temperature cycling testing may require multiple cycles, each cycle including the temperature rise and fall process. The length of testing time depends on the expected service life of the product and the testing standards.

3 Particular attention

During the use of the constant temperature and humidity high and low temperature test chamber, special attention should be paid to the following matters to ensure the accuracy of the test and the long-term stability of the equipment.

• Avoid excessive overload use

During use, avoid prolonged overload operation of the equipment. The test chamber should operate normally within the set temperature and humidity range. Excessive load may cause premature damage or malfunction of the equipment.

• Keep the equipment clean

During the experiment, both the interior and exterior of the test chamber should be kept clean. Especially for the humidity system, the water tank and pipes should be regularly cleaned to avoid blockage of the pipes by scale and impurities, which may affect the normal use of the equipment.

• Regularly check the equipment status

Regularly check the various indicators of the equipment, including temperature and humidity sensors, heating systems, cooling systems, etc. Ensure that all functions of the equipment are functioning properly and avoid inaccurate test results due to equipment malfunctions.

• Sample temperature monitoring

During the high and low temperature testing process, ensure that the sample is uniformly exposed to the set temperature and humidity environment. To avoid the influence of uneven or overheated internal temperature of the equipment on the test samples, which may cause distortion of the test data.

• Avoid frequent opening of doors

During the testing process, try to avoid frequently opening the test chamber door. Opening the door can cause sudden changes in temperature and humidity environment, affecting the stability of the test and even potentially damaging the equipment. The device can only be turned on after testing is completed or when sample replacement is required.

4 After the test

After the experiment is completed, proper post-processing is also crucial to ensure the maintenance of the equipment and the safety of the samples.

• Stop testing and restore to room temperature

After the testing is completed, the testing should be stopped promptly and the equipment should be restored to a normal temperature and humidity state. Avoid damage to equipment or test samples caused by rapid changes in temperature and humidity.

• Record and analyze test data

After the experiment is completed, the test data should be recorded and analyzed in detail. The test results can help R&D personnel understand the performance of samples in different environments and whether they meet relevant quality standards.

• Cleaning and maintaining equipment

After each use, the constant temperature and humidity high and low temperature test chamber should be cleaned, especially the water tank and humidification system. Regular maintenance of equipment can extend its service life and ensure the accuracy of test results.