High and Low Temperature Test Chamber

• Key Differences in Using Environmental Test Chambers Between Summer and Winter

  Nov 26, 2025

  The core difference lies in the impact of ambient temperature and humidity variations on equipment operating efficiency, energy consumption, and test accuracy. Targeted measures for temperature/humidity control, heat dissipation/anti-freezing, and maintenance are required. Specific differences and precautions are as follows: I. Core Difference Comparison Table Dimension Summer Operation Characteristics Winter Operation Characteristics Ambient Conditions High temperature & high humidity (room temp: 30-40℃, RH: 60%-90%) Low temperature & low humidity (room temp: 0-15℃, RH: 30%-60%) Equipment Load High refrigeration system load, prone to overload High heating system load; humidification compensation required for certain models (e.g., temperature-humidity chambers) Impact on Test Accuracy High humidity causes condensation, affecting sensor accuracy Low temperature leads to pipeline freezing; low humidity may reduce stability of humidity tests Energy Consumption High refrigeration energy consumption High heating/humidification energy consumption   II. Season-Specific Precautions (1) Summer Operation: Focus on High Temperature/High Humidity/Overload Prevention 1. Ambient Heat Dissipation Management Reserve ≥50cm ventilation space around the chamber; avoid direct sunlight or proximity to heat sources (e.g., workshop ovens, air conditioner outlets). Ensure laboratory air conditioning operates normally, maintaining room temperature at 25-30℃. If room temp exceeds 35℃, install industrial fans or cooling devices to assist heat dissipation and prevent refrigeration system overload protection triggered by high ambient temperatures. 2. Moisture & Condensation Control Regularly clean chamber door gaskets with a dry cloth to prevent sealant aging and air leakage caused by high humidity. After humidity tests, open the chamber door promptly for ventilation and wipe off condensation to avoid moisture damage to sensors (e.g., humidity sensors). 3. Equipment Operation Protection Avoid prolonged continuous operation of extreme low-temperature tests (e.g., below -40℃). Recommend shutting down for 1 hour after 8 hours of operation to protect the compressor. Periodically inspect refrigeration system radiators (condensers) and remove dust/debris (blow with compressed air monthly) to ensure heat dissipation efficiency. (2) Winter Operation: Focus on Anti-Freezing/Low Humidity/Startup Failure Prevention 1. Ambient Temperature Guarantee Maintain laboratory temperature above 5℃ (strictly follow 10℃ if specified as the minimum operating temperature) to prevent pipeline freezing (e.g., refrigeration capillaries, humidification pipes). For unheated laboratories, install an insulation cover (with ventilation holes reserved) or activate the "preheating mode" (if supported) before testing. 2. Humidification System Maintenance Use distilled water in the humidification tank to avoid pipe blockage from impurity crystallization at low temperatures. Drain water from the humidification tank and pipelines during long-term non-use to prevent freezing-induced component damage. 3. Startup & Operation Specifications In low-temperature environments, activate "standby mode" for 30 minutes preheating before setting test parameters to avoid compressor burnout from excessive startup load. If startup fails (e.g., compressor inactivity), check power voltage (prone to instability during winter peak hours) or contact after-sales to inspect pipeline freezing. 4. Low Humidity Compensation For low-humidity tests (e.g., ≤30% RH), winter dryness may cause rapid humidity. Adjust humidification frequency appropriately and use the "humidity calibration" function to reduce fluctuations. III. General Precautions (All Seasons) Calibrate temperature/humidity sensors quarterly to ensure data accuracy. Clean air filters monthly to maintain airflow circulation. Arrange test samples evenly to avoid blocking internal air ducts and ensure temperature/humidity uniformity. For long-term non-use: Run the chamber for 1 hour monthly in summer (moisture prevention) and drain pipeline water in winter (freezing prevention). By addressing seasonal environmental variations, equipment service life can be extended, and test failures caused by temperature/humidity fluctuations avoided—aligning with the high precision and stability requirements of the industrial test equipment industry.    

  hot Tags : High and Low Temperature Test Chamber High and Low Temperature Humidity Test Chamber Environmental Test Chambers Manufacturers Environmental Simulation Chamber Environmental Test Chambers Temperature Shock Test Chamber

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• Differences Between High-Low Temperature Test Chamber and Thermal Shock Chamber

  Nov 26, 2025

  In industrial product reliability testing, high and low temperature test chambers and temperature shock test chambers are core environmental testing equipment, both simulating extreme temperatures to verify product durability. However, they differ fundamentally: the former focuses on gradual temperature-humidity cycles, while the latter on instantaneous thermal shock. Clarifying these differences is key to matching test needs and ensuring data validity. 1. Rate High-Low Temperature Test Chamber: Slow, with a regular rate of 0.7∼1 ℃/min, and rapid versions can reach 5∼15 ℃/min. Thermal Shock Chamber: Abrupt, with instant switching. 2. Structure High-Low Temperature Test Chamber: Single-chamber structure, integrating heating, refrigeration, and humidification functions. Thermal Shock Chamber: Multi-chamber structure, including high-temperature chamber, low-temperature chamber, and test chamber. 3. Temperature Continuity High-Low Temperature Test Chamber: The temperature changes smoothly without any "shock sensation". Thermal Shock Chamber: The temperature changes by leaps and bounds, with a common temperature range of −40∼150℃. 4. Application High-Low Temperature Test Chamber: Suitable for temperature endurance testing of general products such as electronic devices, household appliances, and building materials. Thermal Shock Chamber: Suitable for shock resistance testing of temperature-sensitive products such as automotive electronics, semiconductors, and aerospace components. 5. Core Position & Test Purpose High-Low Temperature Test Chamber: Simulates gradual temperature (and humidity) changes to test product stability under slow thermal variation (e.g., electronic devices’ performance after gradual cooling to -40℃ or heating to 85℃). Thermal Shock Chamber: Simulates abrupt temperature switching (≤30s transition) to test product resistance to extreme thermal shock (e.g., auto parts adapting to drastic day-night temperature changes, aerospace components’ tolerance to sudden high-low temperature shifts). Summary The high and low temperature test chamber is a "slow-paced endurance test", while the temperature shock chamber is a "fast-paced explosive power challenge". Just based on whether the product will encounter "sudden cold and heat" in the actual usage scenario, the precise selection can be made.

  hot Tags : High and Low Temperature Test Chamber Thermal Shock Test Chamber Environmental Test Chambers Manufacturers Environmental Simulation Chamber Temperature Shock Test Chamber Environmental Chamber

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• What should we pay attention to when using a thermal shock test chamber (water-cooled)?

  Nov 22, 2025

  I. Before Operation Use deionized water or distilled water as cooling water (to prevent scale formation); control temperature at 15-30℃, pressure at 0.15-0.3MPa, flow rate ≥5L/min. Clean the Y-type filter element in advance to ensure unobstructed water flow. Inspect water supply/drainage pipelines for secure connections, no leakage or kinking; keep drainage ports unobstructed with a height difference ≥10cm. Ensure the environment is ventilated and dry, grounding resistance ≤4Ω, and power supply (AC380V±10%) stable. Keep the inner chamber and shelves clean. Sample volume ≤1/3 of effective capacity, with weight evenly distributed on shelves. Seal moisture-sensitive parts of non-hermetic samples to avoid condensation affecting test accuracy. II. During Operation Real-time monitor cooling water pressure, flow rate and temperature. Immediately shut down for troubleshooting (pipeline blockage, leakage or chiller failure) if pressure drops sharply, flow is insufficient or temperature exceeds 35℃. Set high/low temperature parameters per GB/T, IEC and other standards (not exceeding rated range); control heating/cooling rate ≤5℃/min. Prohibit instantaneous switching between extreme temperatures. Do not open the door arbitrarily during operation (to prevent scalding/frostbite from hot/cold air). Use protective gloves for emergency sample handling. Shut down immediately for maintenance upon alarm (overtemperature, water shortage, etc.); prohibit forced operation. III. After Test Turn off power and cooling water inlet/outlet valves; drain residual water in pipelines. Clean the water tank and replace water monthly; add special water stabilizer to extend pipeline service life. Wipe the inner chamber and shelves after temperature returns to room temperature. Clean the air filter (1-2 times monthly); inspect pipeline seals and replace aging/leaking ones promptly. For long-term non-use: Power on and run for 30 minutes monthly (including water cooling system circulation), inject anti-rust protection fluid into pipelines, and cover the equipment with a dust cover in a dry, ventilated place. IV. Prohibitions Prohibit using unqualified water (tap water, well water, etc.) or blocking filters/drainage ports (to avoid affecting heat dissipation). Prohibit overloading samples or unauthorized disassembly/modification of water cooling pipelines/core components. Repairs must be performed by professionals. Prohibit frequent start-stop (wait ≥5 minutes after shutdown before restarting). Prohibit placing flammable, explosive or corrosive substances.

  hot Tags : High and Low Temperature Test Chamber Thermal Shock Test Chamber Environmental Test Chambers Manufacturers Environmental Simulation Chamber Temperature Shock Test Chamber Temperature Environment Test Chamber

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• Differences between High and Low Temperature Test Chamber and Constant Temperature Test Chamber

  Nov 13, 2025

      In environmental reliability testing, high-low temperature humidity test chambers and constant temperature and humidity test chambers are easily confused due to similar names, but they differ significantly in testing capabilities, applications and technical characteristics. Accurate distinction and selection are key to ensuring valid test data. This blog will analyze the core differences and provide selection suggestions. I. Core Definition: Essential Distinction of Functional Boundaries     The core difference between the two starts with functional positioning, which directly determines the applicable scenarios.     The core of the constant temperature and humidity test chamber is "maintaining stability". It can accurately control and maintain the set temperature and humidity for a long time, and is used to simulate the long-term performance of products in specific environments, such as electronic component stability testing and textile temperature-humidity sensitivity testing. Its core requirement is "steady-state environmental performance verification".     The high-low temperature humidity test chamber focuses on "dynamic simulation". In addition to precise temperature and humidity control, it has a wide-range fluctuation capability, which can simulate environments such as high-low temperature cycles and alternating humidity and heat, such as extreme temperature differences during product transportation and diurnal temperature-humidity changes of outdoor equipment. Its core requirement is "dynamic environmental reliability verification". II. Key Differences: Multi-dimensional Analysis from Technology to Application 1. Temperature and Humidity Range and Fluctuation Capacity     The constant temperature and humidity chamber has a mild temperature and humidity range (temperature 0℃-100℃, humidity 30%-95%RH) and high control precision (temperature fluctuation ±0.5℃, humidity ±2%RH), but no extreme temperature-humidity impact capability.     The high-low temperature humidity chamber has a wider temperature and humidity coverage (temperature -70℃~200℃, humidity 10%-98%RH) and rapid change capability (heating rate 3℃/min-15℃/min, cooling rate 1℃/min-10℃/min), which can realize rapid cycle switching between "high temperature and high humidity - low temperature and low humidity"—a feature unavailable in the former. 2. Differences in Core Technical Architecture     The constant temperature and humidity chamber adopts single-stage compression refrigeration, conventional resistance heating, and steam or ultrasonic humidification. Its system design focuses on "energy saving and stability", with simple structure and low operating cost.     To meet extreme needs, the high-low temperature humidity chamber uses cascade refrigeration, rapid-heating tubes, and its humidity system includes a fast-response dehumidification module, with a thicker insulation layer on the chamber wall. Its technical complexity and manufacturing cost are much higher than the former. 3. Applicable Scenarios and Testing Purposes     The constant temperature and humidity chamber is used for steady-state environmental adaptability testing, such as electronic component aging and pharmaceutical storage simulation, to verify the performance consistency and durability of products in a fixed environment.     The high-low temperature humidity chamber focuses on dynamic reliability testing, such as high-low temperature cycling of auto parts and extreme environment simulation of aerospace products, to expose product defects (material aging, structural deformation, etc.) under drastic environmental changes.     In summary, the constant temperature and humidity chamber guards the steady-state environment, while the high-low temperature humidity chamber challenges the dynamic environment. There is no absolute advantage or disadvantage between the two. Only by matching needs, clarifying scenarios and budgets can the test truly guarantee product quality.

  hot Tags : High and Low Temperature Test Chamber Constant Temperature Test Chamber Humidity Test Chamber Environmental Test Chambers Manufacturers Environmental Simulation Chamber Temperature Environment Test Chamber

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• Lab Two-Chamber Thermal Shock Chamber

  Nov 03, 2025

  The two-chamber thermal shock chamber is a highly reliable environmental testing device specifically designed for evaluating the ability of products to withstand extreme temperature changes. It simulates harsh temperature shock conditions to rapidly expose the possible failures of materials, electronic components, automotive parts and aerospace equipment during rapid thermal expansion and contraction, such as cracking, performance degradation and connection faults. It is a key tool for improving product quality and reliability. The core design concept of this device lies in efficiency and harshness. It has two independently controlled test chambers inside: a high-temperature chamber and a low-temperature chamber, which are respectively maintained at the set extreme temperatures continuously. The sample to be tested is placed in an automatic mechanical basket. During the test, the basket will be rapidly switched between the high-temperature zone and the low-temperature zone under the program control, instantly exposing the sample to a huge temperature difference environment, thus achieving the true "thermal shock" effect. Compared with another mainstream three-chamber (static) impact chamber, the significant advantage of the two-chamber type lies in its extremely fast temperature conversion speed and short temperature recovery time, ensuring the strictness and consistency of the test conditions. It is highly suitable for testing samples with sturdy structures that can withstand mechanical movement, and the testing efficiency is extremely high. Its working principle determines that during the testing process, the temperature fluctuation of the high and low temperature chamber is small, it can quickly return to the set point, and is not significantly affected by the sample load. This equipment is widely used in fields such as semiconductors, integrated circuits, national defense science and technology, automotive electronics, and new material research and development, for conducting reliability tests as required by various international standards. Its main technical parameters include a wide temperature range (high temperatures up to +150°C to +200°C, low temperatures down to -40°C to -65°C or even lower), precise temperature control accuracy, and customizable sample area sizes. The Lab two-chamber thermal shock chamber, with its irreplaceable rapid temperature change capability, has become the ultimate touchstone for testing the adaptability and durability of products in extreme temperature environments, providing a strong guarantee for the precision manufacturing and reliability verification of modern industry.

  hot Tags : High and Low Temperature Test Chamber Thermal Shock Test Chamber Basket Impact Test Chamber Reliability Testing Equipment Two-chamber Temperature Test Chamber Lab Temperature Test Chamber

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• Dragon Heat Flow Meter Temperature Control Test

  Oct 29, 2025

  Temperature control tests are usually conducted under two conditions: no-load (without sample placement) and load (with standard samples or actual samples being tested placed). The basic testing steps are as follows:   1. Preparatory work: Ensure that the heat flow meter has been fully preheated and is in a stable state. Prepare high-precision temperature sensors that have undergone metrological calibration (such as multiple platinum resistance PT100), and their accuracy should be much higher than the claimed indicators of the heat flow meter to be measured. 2. Temperature uniformity test: Multiple calibrated temperature sensors are arranged at different positions within the working area of the heat flow meter's heating plate (such as the center, four corners, edges, etc.). Set one or more typical test temperature points (such as -20°C, 25°C, 80°C). After the system reaches thermal stability, simultaneously record the temperature values of all sensors. Calculate the maximum, minimum and standard deviation of these readings to evaluate the uniformity. 3. Temperature control stability and accuracy test: Fix a calibrated temperature sensor at the center of the heating plate (or closely attach it to the built-in sensor of the instrument). Set the target temperature and start the temperature control. Record the entire process from the start to reaching the target temperature (for analyzing response speed and overshoot). After reaching the target temperature, continuously record for at least 1-2 hours (or as per standard requirements), with a sampling frequency high enough (such as once per second), and analyze the recorded data. 4. Load test: Place standard reference materials with known thermal physical properties or typical samples to be tested between the hot plates. Repeat step 3 and observe the changes in temperature control performance under load conditions. Load will directly affect the thermal inertia of the system, thereby influencing the response speed and stability.   When you are choosing or using a heat flow meter, be sure to carefully review the specific parameters regarding temperature control performance in its technical specification sheet and understand under what conditions (no-load/load) these parameters were measured. Lab will provide clear and verifiable temperature control test data and reports.

  hot Tags : High and Low Temperature Test Chamber Temperature Test Chamber Reliability Testing Equipment Dragon Heat Flow Meter Programmable Test Equipment Temperature Control Testing Equipment

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• How is over-temperature protection carried out in a temperature test chamber?

  Oct 23, 2025

  The over-temperature protection of the temperature test chamber is a multi-level and multi-redundant safety system. Its core purpose is to prevent the temperature inside the chamber from rising out of control due to equipment failure, thereby protecting the safety of the test samples, the test chamber itself and the laboratory environment.   The protection system usually consists of the following key parts working together: 1. Sensor: The main sensor is used for the normal temperature control of the test chamber and provides feedback signals to the main controller. An independent over-temperature protection sensor is the key to a safety system. It is a temperature-sensing element independent of the main control temperature system (usually a platinum resistance or thermocouple), which is placed by strategically at the position within the box that best represents the risk of overheating (such as near the heater outlet or on the top of the working chamber). Its sole task is to monitor over-temperature. 2. Processing unit: The main controller receives signals from the main sensor and executes the set temperature program. The independent over-temperature protector, as an independent hardware device, is specifically designed to receive and process the signals from the over-temperature protection sensor. It does not rely on the main controller. Even if the main controller crashes or experiences a serious malfunction, it can still operate normally. 3. Actuator: The main controller controls the on and off of the heater and the cooler. The safety relay/solid-state relay receives the signal sent by the over-temperature protector and directly cuts off the power supply circuit of the heater. This is the final execution action.   The over-temperature protection of the temperature test chamber is a multi-level, hard-wire connected safety system designed based on the concepts of "redundancy" and "independence". It does not rely on the main control system. Through independent sensors and controllers, when a dangerous temperature is detected, it directly and forcibly cuts off the heating energy and notifies the user through sound and light alarms, thus forming a complete and reliable safety closed loop.

  hot Tags : High and Low Temperature Test Chamber Thermal Shock Test Chamber Humidity Test Chamber Temperature Test Chamber Temperature Testing Equipment Precision Ove

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• The Applicability of Temperature Test Chambers to the Testing of Household Environmental Products

  Oct 18, 2025

  A variety of products used in home environments (more common test objects) such as televisions, air conditioners, refrigerators, washing machines, smart speakers, routers, etc., as well as environmental protection products used to improve the home environment: such as air purifiers, fresh air systems, water purifiers, humidifiers/dehumidifiers, etc. No matter which category it is, as long as it needs to work stably for a long time in a home environment, it must undergo strict environmental reliability tests. The high and low temperature test chamber is precisely the core equipment for accomplishing this task.   The home environment is not always warm and pleasant, and products will face various harsh challenges in actual use. This mainly includes regional climate differences, ranging from the severe cold in Northeast China (below -30°C) to the scorching heat in Hainan (up to over 60°C in the car or on the balcony). High-temperature scenarios such as kitchens close to stoves, balconies exposed to direct sunlight, and stuffy attics, etc. Or low-temperature scenarios: warehouses/balconies without heating in northern winters, or near the freezer of refrigerators. The high and low temperature test chamber, by simulating these conditions, "accelerates" the aging of products in the laboratory and exposes problems in advance.   The actual test cases mainly cover the following aspects: 1. The smart TV was continuously operated at a high temperature of 55°C for 8 hours to test its heat dissipation design and prevent screen flickering and system freezing caused by overheating of the mainboard. 2. For products with lithium batteries (such as cordless vacuum cleaners and power tools), conduct charge and discharge cycles at -10°C to assess the battery performance and safety at low temperatures and prevent over-discharge or fire risks. 3. The air purifier (with both types of "environmental product" attributes) undergoes dozens of temperature cycles between -20°C and 45°C to ensure that its plastic air ducts, motor fixing frames and other structures will not crack or produce abnormal noises due to repeated thermal expansion and contraction. 4. Smart door lock: High-temperature and high-humidity test (such as 40°C, 93%RH) to prevent internal circuits from getting damp and short-circuited, which could lead to fingerprint recognition failure or the motor being unable to drive the lock tongue.   High and low temperature test chambers are not only applicable but also indispensable for the testing of household environmental products. By precisely controlling temperature conditions, it can ensure user safety and prevent the risk of fire or electric shock caused by overheating or short circuits. Ensure that the product can work stably in different climates and home environments to reduce after-sales malfunctions. And it can predict the service life of the product through accelerated testing. Therefore, both traditional home appliance giants and emerging smart home companies will take high and low temperature testing as a standard step in their product development and quality control processes.

  hot Tags : High and Low Temperature Test Chamber High and Low Temperature Humidity Test Chamber Cold and Hot Environment Test Chamber Low Humidity Environment Test Chamber High Temperature Aging Test Chamber Reliability Testing Equipment

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• The Principle of Balancing the Temperature inside the Test Chamber by the Air Valve

  Sep 22, 2025

  Its core principle is a closed-loop negative feedback system of "heating - measurement - control". In simple terms, it is to precisely control the power of the heating elements inside the box to counteract the heat dissipation caused by the external environment, thereby maintaining a constant test temperature that is higher than the ambient temperature. The process by which the air valve stabilizes the temperature is a dynamic and continuously adjusting closed loop:   First, set a target temperature. The temperature sensor measures the actual temperature inside the box in real time and transmits the signal to the PID controller. When the PID controller calculates the error value, it calculates the heating power that needs to be adjusted based on the error value through the PID algorithm. The algorithm will take into account three factors P (proportion) : How large is the current error? The greater the error, the greater the adjustment range of the heating power. I (integral) : The accumulation of errors over a certain period of time. It is used to eliminate static errors (for example, if there is always a slight deviation, the integration term will gradually increase the power to completely eliminate it). D (differential) : The rate of change of the current error. If the temperature is rapidly approaching the target, it will reduce the heating power in advance to prevent "overshoot". 3. The PID controller sends the calculated signal to the power controller of the heating element (such as a solid-state relay SSR), precisely regulating the voltage or current applied to the heating wire, thereby controlling its heat generation. 4. The circulating fan works continuously to ensure that the heat generated by heating is distributed rapidly and evenly. At the same time, it also quickly feeds back the signal changes of the temperature sensor to the controller, making the system response more timely.   The air valve balancer measures air volume, while the density of air varies with temperature. Under the same differential pressure value, the mass flow rate or volume flow rate corresponding to air of different densities is different. Therefore, the temperature must be stabilized at a known fixed value so that the microprocessor inside the instrument can accurately calculate the air volume value under standard conditions based on the measured differential pressure value using the preset formula. If the temperature is unstable, the measurement results will be unreliable.  

  hot Tags : High and Low Temperature Test Chamber Constant Temperature and Humidity Chamber Temperature Testing Equipment Environmental Simulation Test Chamber Core Components of Test Chamber High and Low Temperature Balance

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• 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.

  hot Tags : Constant Temperature and Humidity Test Chamber High and Low Temperature Test Chamber Temperature Cycling Box Test Chamber Test Environment Precision Oven Safety Precautions for Test Chambers

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• Lab Three-Combination Test Chamber Low Pressure Test Guide

  Sep 13, 2025

  The core system of the three-combination test chamber mainly consists of a pressure-bearing test chamber, a vacuum system, a special temperature and humidity control system, and a high-precision collaborative controller. Essentially, it is a complex set of equipment that highly integrates a temperature/humidity environment chamber, a vibration table, and a vacuum system (highly simulated). The process of conducting low-pressure tests is a precise collaborative control process. Taking the low-temperature - low-pressure test as an example, its test process is as follows:   1. Preparation stage: Firmly install the sample on the vibrating table surface inside the box (if vibration is not required, install it on the sample rack), close and lock the box door to ensure that the high-strength sealing strip is effective. Set the complete test program on the control interface, including:Pressure curve, temperature curve, humidity curve and vibration curve. 2. Vacuuming and cooling: The control system starts the vacuum pump set, and the vacuum valve opens to begin extracting the air inside the box. Meanwhile, the refrigeration system started to work, sending cold air into the box, and the temperature began to drop. The control system will dynamically coordinate the pumping speed of the vacuum pump and the power of the refrigeration system. Because when the air becomes thinner, the efficiency of heat conduction is greatly reduced, and the difficulty of cooling will increase. The system may not fully cool down until the air pressure drops to a certain level. 3. Low-pressure/low-temperature maintenance stage: Once both the pressure and temperature reach the set values, the system enters the maintenance state. As there is extremely tiny leakage in any box, the pressure sensor will monitor the air pressure in real time. When the air pressure exceeds the set value, the vacuum pump will automatically start to pump a little, maintaining the pressure within a very precise range. 4. Humidification is the most complex step. If it is necessary to simulate high humidity in a high-altitude and low-pressure environment, the control system will activate the external steam generator, and then slowly "inject" the generated steam into the low-pressure box through a special pressurization and metering valve, and the humidity sensor will provide feedback control. 5. After the test period ends, the system enters the recovery stage. The controller slowly opens the pressure relief valve or air injection valve to allow dry filtered air to slowly enter the box, enabling the air pressure to steadily return to normal pressure. When both the air pressure and temperature stabilize at room temperature and normal pressure, the controller will send a signal to indicate the end of the test. The operator can then open the box door and take out the sample for subsequent performance testing and evaluation.   The low-pressure test of the three-combination test chamber is a highly complex process, which relies on the precise coordination of its pressure-resistant chamber, powerful vacuum system and temperature and humidity control system specially designed for low-pressure environments. It can truly simulate the harsh tests that products simultaneously endure in high-altitude, high-altitude and other environments, including severe cold, low oxygen (low air pressure), and humidity. It is an indispensable key testing device in fields such as aerospace, military industry, and automotive electronics.

  hot Tags : High and Low Temperature Test Chamber Three-combination Test Chamber Large-scale Test Equipment Environmental Reliability Test System Vibration - Temperature and Humidity Comprehensive Test Chamber THV Series Three-Combination Test Chamber

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• How to Choose the Appropriate Cooling Method for Test Chambers？

  Sep 09, 2025

  Air cooling and water cooling are two mainstream heat dissipation methods in refrigeration equipment. The most fundamental difference between them lies in the different media they use to discharge the heat generated by the system into the external environment: air cooling relies on air, while water cooling relies on water. This core difference has given rise to numerous distinctions among them in terms of installation, usage, cost and applicable scenarios.   1. Air-cooled system The working principle of an air-cooling system is to force air flow through a fan, blowing it over its core heat dissipation component - the finned condenser, thereby carrying away the heat in the condenser and dissipating it into the surrounding air. Its installation is very simple and flexible. The equipment can operate simply by connecting to the power supply and does not require additional supporting facilities, thus having the lowest requirements for site renovation. This cooling performance is significantly affected by the ambient temperature. In hot summers or high-temperature environments with poor ventilation, due to the reduced temperature difference between the air and the condenser, the heat dissipation efficiency will drop markedly, resulting in a decline in the equipment's cooling capacity and an increase in operational energy consumption. Moreover, it will be accompanied by considerable fan noise during operation. Its initial investment is usually low, and daily maintenance is relatively simple. The main task is to regularly clean the dust on the condenser fins to ensure smooth ventilation. The main operating cost is electricity consumption. Air-cooled systems are highly suitable for small and medium-sized equipment, areas with abundant electricity but scarce water resources or inconvenient water access, laboratories with controllable environmental temperatures, as well as projects with limited budgets or those that prefer a simple and quick installation process.   2. Water-cooled system The working principle of a water-cooling system is to use circulating water flowing through a dedicated water-cooled condenser to absorb and carry away the heat of the system. The heated water flow is usually transported to the outdoor cooling tower for cooling and then recycled again. Its installation is complex and requires a complete set of external water systems, including cooling towers, water pumps, water pipe networks and water treatment devices. This not only fixes the installation location of the equipment, but also places high demands on site planning and infrastructure. The heat dissipation performance of the system is very stable and is basically not affected by changes in the external environmental temperature. Meanwhile, the operating noise near the equipment body is relatively low. Its initial investment is high. Besides electricity consumption, there are also other costs such as continuous water resource consumption during daily operation. The maintenance work is also more professional and complex, and it is necessary to prevent scale formation, corrosion and microbial growth. Water-cooled systems are mainly suitable for large, high-power industrial-grade equipment, workshops with high ambient temperatures or poor ventilation conditions, as well as situations where extremely high temperature stability and refrigeration efficiency are required.   Choosing between air cooling and water cooling is not about judging their absolute superiority or inferiority, but about finding the solution that best suits one's specific conditions. Decisions should be based on the following considerations: Firstly, large high-power equipment usually prefers water cooling to achieve stable performance. At the same time, the geographical climate of the laboratory (whether it is hot), water supply conditions, installation space and ventilation conditions need to be evaluated. Secondly, if a relatively low initial investment is valued, air cooling is a suitable choice. If the focus is on long-term operational energy efficiency and stability, and one does not mind the relatively high initial construction cost, then water cooling has more advantages. Finally, it is necessary to consider whether one has the professional ability to conduct regular maintenance on complex water systems.

  hot Tags : High and Low Temperature Test Chamber Temperature Test Chamber Test Chamber Air-cooled Heat Dissipation Test Chamber Water Cooling Heat Dissipation Refrigeration Equipment for Test Chamber Environmental Simulation Test Chamber

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