Combined Temperature-Humidity-Vibration Environmental Test Chamber

Overview

The Combined Temperature-Humidity-Vibration Environmental Test Chamber is an integrated reliability testing platform engineered for simultaneous exposure of test specimens to controlled thermal, hygrothermal, and mechanical vibration stressors. It operates on the principle of synergistic environmental simulation—precisely coordinating climatic conditioning (via refrigeration, heating, and steam-based humidification) with electrodynamic or servo-hydraulic vibration excitation in a single, unified test volume. This tri-stress coupling enables accelerated life testing, failure mode analysis, and qualification validation per MIL-STD-810H Method 520.5 (Vibration + Temperature), IEC 60068-2-64 (Random Vibration), and IEC 60068-2-30 (Damp Heat Cycling). The chamber is designed for laboratory and production-line use in aerospace component validation, automotive ECU durability assessment, medical device sterilization packaging integrity verification, and high-reliability electronics burn-in under real-world operational stress profiles.

Key Features

• Hermetically sealed test compartment constructed from A3 carbon steel exterior (powder-coated) and SUS304 stainless steel interior (mirror-finish), insulated with high-density ultra-fine glass fiber (thermal conductivity ≤ 0.036 W/m·K)
• Dual-circuit refrigeration system featuring a hermetic Tecumseh (France) compressor, two-stage cascade cooling architecture, and critical components including Parker Sporlan (USA) dry filters, GY Oil Separator (Taiwan), and CASTEL (Italy) solenoid valves
• Uniform climate distribution ensured by top-mounted multi-blade centrifugal fan with adjustable airflow velocity (0.5–1.2 m/s), bottom return air ducting, and optimized internal baffle geometry to maintain ±0.5 °C temperature uniformity and ±2 % RH uniformity across the working volume
• Independent control loops for heating (stainless steel finned tubular heaters), cooling (refrigerant R404A/R23 cascade), and humidification (electric steam generator with PID-controlled water level and anti-scaling auto-drain)
• 7-inch TFT LCD color touchscreen controller with embedded programmable logic, supporting up to 100 multi-segment profiles (each with ramp/soak/humidity/vibration parameters), real-time trend logging, and password-protected user levels
• Modular vibration interface: standardized mounting flange (ISO 13373-2 compliant) accommodating optional shaker systems (e.g., LDS V875, TIRA TV 51120, or custom electrodynamic units) with dynamic force range 0–10 kN, frequency bandwidth 5–3000 Hz, and sealed feedthroughs for inertial mass coupling

Sample Compatibility & Compliance

The chamber accommodates specimens up to 600 mm × 600 mm × 600 mm (W×D×H) with maximum payload of 50 kg on the integrated vibration deck. Structural integration includes removable linear guide rails for vibration table insertion/retraction, multi-layer epoxy-silicone composite gasketing at the shaker interface, and double-lip high-tensile silicone door seals rated to 120 °C continuous operation. Observation is enabled via triple-layer laminated tempered glass viewport with embedded ITO conductive film (anti-fog, 92 % light transmittance). Electrical feedthroughs (Φ50 mm, left-side) support Class I IP2X-rated cable routing. Complies with EN 60068-3-5 (Environmental testing – Part 3-5: Supporting documentation and guidance – Confirmation of the performance of temperature chambers), ISO 16750-4 (Road vehicles – Environmental conditions and testing for electrical and electronic equipment – Climatic loads), and supports audit-ready data integrity per FDA 21 CFR Part 11 when paired with validated software.

Software & Data Management

The embedded controller provides native RS232/RS485 serial communication and optional Ethernet TCP/IP interface. Data export formats include CSV and XML; time-stamped logs record temperature, relative humidity, vibration acceleration (m/s²), displacement (mm), and drive voltage. Optional PC-based software (Windows 10/11 compatible) delivers full remote monitoring, alarm event correlation, statistical process control (SPC) charting, and automated report generation compliant with GLP/GMP documentation requirements. Audit trails capture all parameter changes, user logins, and calibration events with immutable timestamps.

Applications

• Accelerated aging of lithium-ion battery modules under thermal cycling + random vibration
• Qualification testing of avionics enclosures per DO-160 Section 25 (Vibration) and Section 10 (Temperature/Humidity)
• Validation of MEMS sensor packaging integrity during combined damp heat and resonant frequency sweep
• Reliability screening of automotive ADAS camera housings exposed to condensation cycles + road-spectrum vibration
• Testing of sterile barrier systems (e.g., Tyvek® pouches) per ISO 11607-1 under cyclic humidity + mechanical flex fatigue

FAQ

What vibration standards can this chamber support?
It natively supports IEC 60068-2-6 (sinusoidal), IEC 60068-2-64 (broadband random), and MIL-STD-810H Methods 514.8 and 520.5 when configured with certified shaker hardware and appropriate control algorithms.
Is the humidification system suitable for long-term 95 % RH operation?
Yes—the steam generator incorporates automatic scale inhibition, continuous water level feedback, and redundant overtemperature cutoff, enabling stable operation at 10–95 % RH across –70 to +150 °C.
Can the chamber be integrated into an existing MES or LIMS environment?
Via Modbus TCP or OPC UA protocol adapters (optional), raw sensor and actuator data streams can be ingested directly into enterprise manufacturing execution or laboratory information management systems.
What maintenance intervals are recommended for the refrigeration system?
Compressor oil and filter replacement every 24 months; refrigerant circuit leak inspection annually; full calibration of temperature/humidity sensors traceable to NIST standards every 12 months.
Does the system support unattended weekend testing?
Yes—equipped with dual independent safety cutouts (mechanical thermostat + digital limiter), UPS-compatible power input, and email/SMS alerting for critical fault conditions (e.g., refrigerant loss, door open >30 s, vibration overload).