OK-TH-800 Temperature and Humidity Controlled Environmental Test Chamber

Overview

The OK-TH-800 is a precision-engineered temperature and humidity controlled environmental test chamber designed for rigorous reliability validation of electronic components, automotive modules, aerospace materials, and medical devices under accelerated stress conditions. It operates on the principle of forced-air convection combined with dual-stage refrigeration and steam-based humidification to deliver stable, repeatable climatic profiles across an extended operational envelope. The chamber meets the physical and metrological requirements defined in IEC 60068-3-5 (Environmental testing – Part 3-5: Supporting documentation and guidance – Confirmation of the performance of temperature chambers) and ISO 16750-4 (Road vehicles – Environmental conditions and testing for electrical and electronic equipment – Part 4: Climatic loads), ensuring traceable compliance for engineering validation labs operating under GLP or ISO/IEC 17025 frameworks.

Key Features

• Robust chamber architecture featuring mirror-polished SUS304 stainless steel interior (electropolished finish) and A3 cold-rolled steel exterior with electrostatic powder coating for corrosion resistance and long-term dimensional stability.
• Dual-stage refrigeration system incorporating hermetically sealed compressors (selectable from Tecumseh/France or Copeland/Germany) and environmentally compliant mixed-refrigerant blend (R23/R404A), enabling reliable operation down to −65 °C without liquid nitrogen assistance.
• High-efficiency steam-type stainless steel humidifier with anti-scale design and automatic water level monitoring; integrated dehumidification via refrigerant coil bypass ensures precise RH control across full 20–95 % RH range.
• TEMI880 intelligent controller with 7-inch color TFT-LCD touchscreen, supporting 120 programmable segments, real-time trend graphs (setpoint vs. actual), multi-zone PID tuning, and event-triggered data capture at user-defined intervals.
• Optimized airflow design using backward-curved centrifugal blower and baffled ductwork to achieve ±2.0 °C temperature uniformity and ±3.0 % RH uniformity per IEC 60068-3-5 Annex D verification protocols.
• Multi-layer safety architecture including over-temperature cut-off, compressor high-pressure shutdown, humidity sensor fault detection, door interlock switch, and independent mechanical thermostat backup.

Sample Compatibility & Compliance

The OK-TH-800 accommodates standard test specimens up to 500 mm × 500 mm × 500 mm (W×D×H) with optional internal power feedthroughs (up to 30 A, 3-phase) for live-load testing of powered assemblies. Its chamber geometry and thermal mass distribution are validated per GB/T 5170.2–2017 (equivalent to IEC 60068-3-5) for temperature uniformity and recovery time. All models undergo factory calibration against NIST-traceable reference sensors prior to shipment. The system supports audit-ready documentation packages compliant with FDA 21 CFR Part 11 (electronic records/signatures), including IQ/OQ templates, calibration certificates, and deviation logs — essential for regulated industries including pharmaceutical packaging validation and implantable device qualification.

Software & Data Management

The TEMI880 controller embeds non-volatile memory capable of storing ≥10,000 hours of timestamped temperature/humidity data at 1-second resolution. Export is supported via USB 2.0 port in CSV format for post-processing in MATLAB, JMP, or Minitab. Optional PC-based software (OK-Link v3.2) enables remote monitoring, multi-chamber synchronization, statistical process control (SPC) charting, and automated report generation (PDF/Excel) aligned with ISO 9001 clause 8.2.4. Audit trails record all parameter changes, user logins, alarm events, and calibration interventions with immutable timestamps — satisfying GMP Annex 11 and EU GMP Chapter 4 requirements for electronic data integrity.

Applications

• Accelerated life testing of PCBAs under temperature cycling (−40 °C ↔ +85 °C) with concurrent humidity soak (85 % RH).
• Validation of moisture barrier integrity in flexible OLED encapsulation films per JEDEC J-STD-020D.
• Thermal shock preconditioning of lithium-ion battery cells prior to safety testing (UN 38.3).
• Stability assessment of polymer-based drug delivery systems under ICH Q1A(R2) long-term and accelerated storage conditions.
• Qualification of avionics enclosures per DO-160G Section 4 (temperature) and Section 5 (humidity) environmental categories.

FAQ

What is the standard lead time for delivery after order confirmation?
Standard delivery is 6–8 weeks from receipt of formal purchase order and advance payment, subject to final configuration review and factory scheduling.
Does the OK-TH-800 support custom test profiles compliant with MIL-STD-810H Method 502.7?
Yes — the TEMI880 controller supports user-defined ramp-soak-dwell sequences with variable rates and conditional triggers, fully compatible with MIL-STD-810H low-temperature storage, operating, and temperature shock profiles.
Is third-party certification (e.g., TÜV SÜD or UL) available for this model?
TÜV SÜD Factory Inspection and CE Declaration of Conformity (EN 61000-6-2/6-4, EN 61010-1) are included in base configuration; additional UL 61010-1 listing requires separate application and 4–6 week evaluation cycle.
Can the chamber be integrated into a central building management system (BMS)?
Yes — optional Modbus RTU (RS-485) or Ethernet/IP interface modules enable bi-directional communication with BMS platforms for real-time status reporting and alarm forwarding.
What maintenance schedule is recommended for optimal long-term performance?
Compressor oil analysis and refrigerant leak check every 12 months; humidity sensor recalibration and chamber seal inspection every 6 months; full system verification per IEC 60068-3-5 annually or after major component replacement.