Building a Safe Test Chamber Test Environment
Sep 16, 2025
The key to creating a safe testing environment for the Lab high and low temperature test chamber lies in ensuring personal safety, equipment safety, test piece safety and data accuracy.
1.Personal Safety Considerations
Before opening the high-temperature chamber door to take out the sample, it is necessary to wear the high and low temperature resistant protective equipment properly. When performing operations that may cause splashing or the leakage of extremely hot/cold gases, it is recommended to wear a protective face mask or goggles.
The test chamber should be installed in a well-ventilated laboratory and avoid operating in a confined small space. High-temperature testing may release volatile substances from the test piece. Good ventilation can prevent the accumulation of harmful gases.
Ensure that the power cord specifications meet the equipment requirements and the grounding wire must be reliably connected. Most importantly, it is strictly forbidden to touch power plugs, switches and samples with wet hands to prevent electric shock.
2. Install the equipment correctly
The minimum safety distance specified by the manufacturer (usually at least 50-100 centimeters) must be left on the back, top and both sides of the equipment to ensure the normal operation of the condenser, compressor and other heat dissipation systems. Poor ventilation can cause equipment to overheat, performance decline and even fire.
It is recommended to provide a dedicated power line for the test chamber to avoid sharing the same circuit with other high-power equipment (such as air conditioners and large instruments), which may cause voltage fluctuations or tripping.
The ambient temperature for the operation of the equipment is recommended to be between 5°C and 30°C. Excessively high ambient temperatures will significantly increase the load on the compressor, leading to a decline in refrigeration efficiency and malfunctions. Please note that the equipment should not be installed in direct sunlight, near heat sources or in places with strong vibrations.
3. Ensuring the Validity and Repeatability of Tests
The samples should be placed in the central position of the working chamber inside the box. There should be sufficient space between the samples and between the samples and the box wall (it is usually recommended to be more than 50mm) to ensure smooth air circulation inside the box and uniform and stable temperature.
After conducting high-temperature and high-humidity tests (such as in a constant temperature and humidity chamber), if low-temperature tests are required, dehumidification operations should be carried out to prevent excessive ice formation inside the chamber, which could affect the performance of the equipment.
It is strictly prohibited to test flammable, explosive, highly corrosive and highly volatile substances, except for explosion-proof test chambers specially designed for this purpose. It is strictly prohibited to place dangerous goods such as alcohol and gasoline in ordinary high and low temperature chambers.
4. Safety Operation Specifications and Emergency Procedures
Before operation, check whether the box door is well sealed and whether the door lock function is normal. Check if the box is clean and free of any foreign objects. Confirm whether the set temperature curve (program) is correct.
During the test period, it is necessary to regularly check whether the operation status of the equipment is normal and whether there are any abnormal noises or alarms.
Sample handling and placement norms: Wear high and low temperature gloves properly. After opening the door, slightly turn your body to the side to avoid the heat wave hitting your face. Quickly and carefully remove the sample and place it in a safe area.
Emergency response: Be familiar with the location of the emergency stop button of the equipment or how to quickly cut off the main power supply in an emergency. Carbon dioxide fire extinguishers (suitable for electrical fires) should be provided nearby instead of water or foam fire extinguishers.
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