English Product Name

Overview

The OK-TH Series Precision Temperature and Humidity Controlled Environmental Test Chamber is engineered for rigorous reliability validation, accelerated aging studies, and environmental stress screening in R&D laboratories, quality assurance departments, and manufacturing facilities. Operating on a dual-stage refrigeration architecture with cascaded compressors and optimized heat exchanger design, the chamber delivers stable, repeatable thermal and hygrothermal profiles across its full operational envelope—from deep cryogenic conditions (-70 °C) to high-temperature exposure (+150 °C), coupled with precise humidity control (20–98 %RH). Its performance is validated against internationally recognized test standards including MIL-STD-810G (implemented via China’s GJB 150.3 and GJB 150.4), IEC 60068-2 series, and GB/T 2423 family specifications—ensuring data integrity for compliance-driven industries such as aerospace, automotive electronics, medical device manufacturing, and defense systems integration.

Key Features

• Intelligent microprocessor-based controller with 7-inch color TFT touchscreen interface, supporting seamless English/Chinese language switching and real-time graphical trend display of temperature and humidity profiles.
• Full SUS#304 stainless steel construction—both interior chamber and outer casing—providing exceptional corrosion resistance, cleanroom compatibility, and long-term structural stability under cyclic thermal loading.
• Multi-layer insulated observation window with embedded ITO (indium tin oxide) conductive film, enabling unobstructed visual monitoring without condensation or electrostatic interference during high-humidity operation.
• Dual-stage hermetic refrigeration system utilizing environmentally compliant refrigerants (R404A for primary stage, R23 for sub-zero cascade stage), delivering low acoustic noise (<65 dB(A)) and minimized vibration transmission to sensitive test specimens.
• High-integrity sealing architecture featuring dual-lip high-tensile silicone gaskets at door interface, ensuring leak-tight performance and consistent chamber integrity over thousands of thermal cycles.
• Integrated safety interlock system with real-time fault diagnostics—including compressor overheat, sensor failure, door-open alarm, and power anomaly detection—triggering automatic shutdown and on-screen fault code display per IEC 61000-4-5 surge immunity requirements.

Sample Compatibility & Compliance

The OK-TH chamber accommodates diverse sample geometries through six standardized internal volume configurations (80 L to 1000 L), all customizable for non-standard DUT (Device Under Test) footprints. A single Ø50 mm test port—positioned on the left side wall—is fitted with a thermally insulated, vacuum-grade elastomeric seal, permitting safe feedthrough of power cables, thermocouple leads, or pneumatic lines without compromising environmental integrity. All models meet electromagnetic compatibility (EMC) Class B requirements per EN 61326-1 and are designed to support GLP/GMP-aligned validation protocols. Documentation packages include IQ/OQ templates traceable to ISO/IEC 17025 and FDA 21 CFR Part 11-compliant audit trails when paired with optional data logging software.

Software & Data Management

The embedded controller supports USB export of time-stamped CSV log files (up to 10,000 data points per channel) with configurable sampling intervals (1 s to 60 min). Optional PC-based software enables remote monitoring, multi-chamber synchronization, automated test sequence scripting (per IEC 60068-3-6), and report generation compliant with ISO 17025 calibration record formats. All logged data includes metadata tags for operator ID, test protocol version, chamber serial number, and environmental sensor calibration expiry dates—facilitating full traceability in regulated environments.

Applications

• Accelerated life testing of polymer components, PCB assemblies, and lithium-ion battery modules under combined thermal-hygric stress.
• Pre-conditioning of optical sensors and MEMS devices prior to functional verification per MIL-PRF-38534 Class K requirements.
• Environmental qualification of avionics enclosures per DO-160 Section 4 (Temperature) and Section 5 (Humidity).
• Stability testing of pharmaceutical packaging materials under ICH Q1A(R2) climatic zone IV conditions.
• Validation of HVAC control algorithms using programmable ramp-and-soak profiles with hold tolerance bands.

FAQ

What is the standard calibration interval recommended for this chamber?

Annual calibration is recommended per ISO/IEC 17025 guidelines, with verification of temperature uniformity, humidity accuracy, and ramp rate performance using NIST-traceable reference sensors.

Can the chamber be integrated into a factory MES or SCADA system?

Yes—RS485 Modbus RTU and optional Ethernet/IP interfaces enable bi-directional communication with industrial automation platforms for centralized environmental monitoring and alarm forwarding.

Is the R404A/R23 refrigerant blend compliant with current EU F-Gas Regulation (EU) No 517/2014?

The system complies with Phase-down Schedule Tier 3; R404A is permitted for servicing existing equipment until 2030, and R23 remains unrestricted under Annex I of the regulation.

Does the controller support user-defined test profiles with multiple segments and conditional branching?

Yes—the built-in program editor allows up to 120 segments per profile, with jump-to-step, loop count, and event-triggered transitions based on elapsed time or sensor thresholds.

What documentation is provided for regulatory audits?

Standard delivery includes Factory Acceptance Test (FAT) report, electrical safety certificate (IEC 61010-1), EMC test summary, material declarations (RoHS/REACH), and a comprehensive user manual with maintenance schedules and spare parts list.