What do you know about test chamber safety protection settings?
Dec 04, 2025
Test chambers, as core equipment for environmental reliability testing across industries such as electronics, automotive, aerospace, and new energy, rely on a multi-dimensional, redundant safety protection system to ensure long-term operational stability, personnel safety, and the integrity of test samples and equipment. Beyond basic safety guarantees, these protection mechanisms are designed to adapt to complex test scenarios and extreme environmental conditions. Here’s a professional and detailed breakdown of the core protection settings:
1. Refrigeration System Protection
Compressor protection: Equipped with overpressure, overheating, and overcurrent triple protection mechanisms. Real-time monitoring of operating pressure, exhaust temperature, and working current prevents compressor burnout, cylinder scuffing, or seal damage caused by abnormal conditions such as refrigerant leakage, pipeline blockage, or voltage fluctuations.
Refrigerant protection: Integrated high/low pressure switches and overload protection devices continuously monitor the refrigerant circulation system. When pressure exceeds the safe threshold or the system is overloaded, the device automatically cuts off the corresponding circuit and triggers an alarm, ensuring stable refrigerant flow and avoiding system damage due to pressure anomalies.
2. Test Area Protection
Multi-layer over-temperature protection (redundant design):
1st layer: Adjustable high/low temperature over-temperature protection, dynamically linked to the set operating control temperature. When the test area temperature deviates from the set range by a preset value, the system automatically adjusts the heating/cooling module or pauses operation to prevent sample damage.
2nd/3rd layers: Independent electronic high-temperature over-temperature protection devices (double redundancy). Directly connected to the power supply circuit, these devices bypass the main control system to cut off power immediately if the 1st layer protection fails, eliminating potential fire hazards or equipment damage caused by excessive temperature.
Fan motor overcurrent protection: Monitors the operating current of the test area circulation fan. If the motor jams, wears, or experiences current surges due to other faults, the protection system triggers an alarm and cuts off power to avoid motor burnout and ensure uniform temperature distribution in the test chamber.
Fault alarm system: Integrates sound and light alarms with a digital display. When abnormalities occur (e.g., over-temperature, water shortage, or sensor failure), the system immediately cuts off the relevant power supply, activates the alarm, and displays the specific fault cause on the control panel for quick troubleshooting.
Active water shortage reminder: For humidity-controlled test chambers, a real-time water level monitoring sensor in the humidity water tank triggers an audible and visual alarm when the water level is too low. The system pauses the humidity control function to prevent dry burning of the humidifier and ensure the stability of the humidity control system.
Dynamic high/low temperature protection: Real-time adapts to the set test parameters (temperature range, rate of change). During rapid temperature rise/fall or extreme temperature tests, the protection system dynamically adjusts the safety threshold to avoid false triggers while ensuring comprehensive protection against temperature anomalies.
3. General Electrical Protection
Main power supply protection: Equipped with phase sequence and phase loss protection devices. Automatically detects the phase sequence and integrity of the three-phase power supply; if phase sequence reversal or phase loss occurs, the system locks the power supply and alarms to prevent damage to the compressor, fan, and other core components caused by incorrect power supply.
Short circuit & leakage/surge protection: Configured with high-sensitivity short circuit breakers to quickly cut off power in case of line short circuits, avoiding electrical fires or component burnout. Equipped with leakage circuit breakers and RC electronic surge protectors to prevent electric shock hazards caused by equipment leakage and suppress voltage surges from the power grid, protecting the control system and electronic components.
Sensor self-detection: Real-time self-inspection of temperature, humidity, and other key sensors. If a sensor malfunctions (e.g., signal loss, inaccurate measurement), the system immediately alarms and switches to backup sensor data (if equipped) or pauses operation to ensure the reliability of test data and prevent misoperation due to false sensor signals.
Dry heating protection (humidity water circuit): For the humidity water circuit and humidifier, a dedicated dry heating protection device monitors the water level and heating status. If the humidifier heats without water, the protection system cuts off the heating power immediately to avoid humidifier burnout and extend the service life of the humidity system.
Expandable protection: Reserved 2 fault detection input interfaces, supporting customized addition of special protection modules (e.g., gas leakage protection for flammable/explosive test samples, pressure protection for sealed test chambers) to meet the safety requirements of industry-specific test scenarios.
These multi-layered, redundant, and configurable protection mechanisms form a comprehensive safety barrier for test chambers. Whether in routine reliability testing or extreme environmental simulations, they ensure the equipment operates stably and reliably, while maximally safeguarding the safety of operators, test samples, and the equipment itself—becoming a key guarantee for the accuracy of test results and long-term operational efficiency.
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