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Written by Shirley
Product Manager, Doaho Test (DHT®)
Industry Challenges & Solution Background
Within China’s expansive rail transit communication signaling landscape, a core subsidiary of CRSC (China Railway Signal & Communication Corporation) stands as a nationally designated leader in signaling equipment manufacturing. Renowned for technological innovation and driving industry standard upgrades, this enterprise faced critical challenges in ensuring product reliability and environmental adaptability. Partnering with DHT® (Duohe Testing), they deployed a high-performance walk-in temperature and humidity aging test chamber, establishing a new benchmark for quality validation.
DHT® Test Chamber Technical Advantages & Case Studies
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Intelligent Test Management
Seamless integration with enterprise MES systems via RS485 industrial bus protocol enables:
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Remote Programming Control: Dynamic adjustment of temperature ramp rates (±3°C/min) and humidity fluctuations (±2%RH)
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Real-Time Data Visualization: Recording of temperature/humidity curves (0.1Hz sampling) and power consumption metrics, generating IEC 60068-3-5-compliant test reports
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Proven Impact: Achieved a 22% reduction in R&D cycle (from 45 days to 35 days) during testing of a train communication controller.
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Precision Environmental Simulation
A CFD-optimized multi-wing centrifugal fan system with layered airflow ducts delivers:
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Temperature Uniformity: ±1.5°C (exceeding GB/T 10592-2008 requirement of ≤±2°C)
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Humidity Accuracy: ±1.5%RH at 25°C
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Case Study: Simulated 5,000m altitude/-40°C conditions for plateau communication base stations, reducing failure rates to 0.3% (vs. 2.1% with conventional methods).
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High-Reliability Operation
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Triple Safety Protections: Class III overload current protection + refrigerant leak detection (10ppm sensitivity) + redundant power switching (<50ms response)
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Self-Diagnostic System: Fuzzy PID algorithm-based predictive maintenance alerts, achieving 8,000-hour MTBF
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Performance Validation: 99.98% system availability during 7×24 continuous testing.
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Energy Efficiency & Sustainability
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Eco Technologies: EC inverter compressors (IPLV 6.2) + VIP insulation panels (thermal conductivity ≤0.003W/m·K)
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Environmental Metrics: 35% lower carbon emissions (annual energy savings ≥120,000 kWh)
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Noise Reduction: ≤65dB(A) at 1m (per ISO 3744).
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Through this series of practical application cases, the DHT® walk-in high and low temperature aging chamber has not only helped enterprises break through technical testing bottlenecks, but also created significant value across multiple dimensions—such as efficiency, environmental sustainability, and user experience—jointly driving a major leap in the quality of global rail transit communication and signaling equipment.