OK-TH-80 Temperature and Humidity Controlled Environmental Test Chamber

Overview

The OK-TH-80 is a precision-engineered temperature and humidity controlled environmental test chamber designed for rigorous reliability validation, accelerated aging studies, and quality assurance testing across electronics, automotive components, aerospace subsystems, pharmaceutical packaging, and polymer materials. It operates on the principle of forced-air convection combined with dual-stage refrigeration and PID-controlled steam humidification to maintain stable, repeatable climatic conditions within its insulated stainless-steel chamber. Unlike basic thermal chambers, the OK-TH-80 integrates high-fidelity sensing (0.1°C / 0.1% RH resolution), tight uniformity control (±0.5°C / ±2.5% RH), and programmable ramp-soak profiles—enabling compliance-driven testing per international standards including IEC 60068-2 series, MIL-STD-810G, and GB/T 2423. Its modular architecture supports both steady-state (e.g., constant 40°C/93% RH per IEC 60068-2-78) and dynamic cyclic protocols (e.g., 12-hr humid heat cycles per IEC 60068-2-30), making it suitable for HALT pre-screening, qualification testing, and long-term stability monitoring under defined environmental stress.

Key Features

• Hermetically sealed dual-stage refrigeration system using environmentally compliant refrigerants R404A (high-stage) and R23 (low-stage), enabling operation down to −70°C without liquid nitrogen dependency.
• High-accuracy PT100 sensors with real-time feedback to a 7-inch full-color LCD touch controller supporting English/Chinese language switching, data logging, and USB export of test records.
• SUS#304 stainless-steel interior and exterior construction ensures corrosion resistance, cleanability, and structural integrity over extended operational lifecycles.
• Forced-air circulation via axial fans with adjustable baffle design guarantees uniform temperature and humidity distribution—validated at ±0.5°C and ±2.5% RH across the entire working volume.
• Standard configuration includes one φ50 mm unsealed cable port, two height-adjustable stainless steel shelves, four swivel casters with locking brakes, and four threaded leveling feet for precise horizontal alignment.
• Programmable ramp rates (configurable from 0.5 to 5.0°C/min) and soak dwell functions allow emulation of realistic thermal transients encountered in field deployment or transport environments.

Sample Compatibility & Compliance

The OK-TH-80 accommodates samples up to 40 × 50 × 40 cm (W×H×D) internal volume, with optional custom chamber modifications available for non-standard specimen geometries. Its chamber layout permits unobstructed airflow around test articles while minimizing thermal shadowing. The unit is certified to meet requirements of multiple international test standards: IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-78 (steady-state damp heat), and IEC 60068-2-30 (cyclic damp heat). It also satisfies Chinese national standards GB/T 2423.1–2001 (low temperature), GB/T 2423.2–2001 (high temperature), and GB/T 2423.4–1993 (damp heat, cyclic), as well as military specifications GJB 150.3–1986 and GJB 150.4–1986. While not pre-certified for FDA 21 CFR Part 11, its controller supports audit-trail-enabled data logging when integrated with validated third-party software platforms used in GLP/GMP-regulated laboratories.

Software & Data Management

The embedded controller provides local test programming, real-time parameter visualization, alarm history, and event-triggered data capture. All operational parameters—including setpoints, actual chamber values, ramp rates, and elapsed time—are recorded at user-defined intervals (1–60 sec) and stored internally for up to 30 days. Data export is supported via USB flash drive in CSV format for post-processing in Excel, MATLAB, or statistical analysis tools such as JMP or Minitab. Optional RS485/Modbus RTU or Ethernet (TCP/IP) interfaces enable integration into centralized lab management systems (LIMS) or SCADA networks for remote supervision and automated report generation. Firmware updates are performed offline via USB, ensuring system integrity during regulatory audits.

Applications

• Electronics: Thermal cycling of PCBAs, moisture sensitivity level (MSL) evaluation per JEDEC J-STD-020, and solder joint reliability assessment under combined thermal-humidity stress.
• Automotive: Validation of infotainment displays, battery management systems, and sensor housings per ISO 16750-4 (climate resistance) and SAE J2309 (humidity exposure).
• Pharmaceuticals: Stability testing of primary packaging (blister packs, vials) under ICH Q1A(R2) recommended conditions (e.g., 25°C/60% RH, 30°C/65% RH).
• Polymers & Composites: Accelerated weathering simulation, hygrothermal aging of fiber-reinforced resins, and coefficient of thermal expansion (CTE) correlation studies.
• Research & Development: Controlled environment experimentation requiring reproducible humidity gradients, dew point control, or condensation onset analysis.

FAQ

Is the OK-TH-80 compliant with ISO/IEC 17025 calibration requirements?
The chamber itself is not a measuring instrument; however, its integrated PT100 sensors can be externally calibrated per ISO/IEC 17025 by an accredited laboratory using NIST-traceable reference standards.
Can the controller generate electronic signatures for 21 CFR Part 11 compliance?
No—the standard controller does not include role-based access control, electronic signature capability, or audit trail features required for Part 11. Integration with validated third-party software is necessary for regulated environments.
What is the maximum load weight capacity of the standard shelves?
Each SUS#304 shelf is rated for 15 kg uniformly distributed load. Custom heavy-duty shelving (up to 30 kg capacity) is available upon request.
Does the unit support external signal triggering for synchronized testing?
Yes—via dry-contact inputs (start/stop/pause) and analog voltage outputs (0–10 V) for temperature/humidity feedback, enabling coordination with vibration shakers, power supplies, or data acquisition systems.
Is remote monitoring possible without additional hardware?
Remote viewing requires optional Ethernet module installation. Once configured, users can access live chamber status and historical trends through a secure web interface compatible with modern browsers.