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

Overview

The OK-TH-800 Temperature and Humidity Controlled Environmental Test Chamber is an engineered solution for precise, repeatable simulation of climatic stress conditions in laboratory and industrial quality assurance environments. Designed around a dual-stage mechanical refrigeration architecture with hermetically sealed compressors (typically Tecumseh or Copeland), the chamber delivers stable thermal and hygrothermal profiles across an extended operational envelope: −65 °C to +150 °C and 20–95 % RH. Its measurement fidelity—±0.5 °C temperature stability and ±1.5 % RH humidity stability—is validated under no-load, steady-state conditions per GB/T 5170 and IEC 60068-2 series standards. The system employs forced-air convection via centrifugal circulation fans, ensuring uniform heat/moisture distribution within the test volume while maintaining acoustic performance below 65 dB(A) through vibration-dampened mounting and insulated enclosure design.

Key Features

• Double-wall construction with 100 mm composite insulation (high-density glass fiber + rigid polyurethane foam) minimizes thermal bridging and supports rapid ramp rates.
• Interior chamber fabricated from electropolished SUS304 mirror-finish stainless steel—resistant to corrosion, easy to clean, and compliant with ISO 14644-1 cleanroom-grade surface requirements.
• Observation window composed of multi-layer tempered safety glass with integrated conductive film heating and Philips LED illumination—enables real-time visual monitoring without condensation interference.
• Dual-stage refrigeration circuit utilizing R23 (low-temp stage) and R404A (high-temp stage) ensures reliable sub-zero operation down to −65 °C without cryogenic consumables.
• TEMI880 intelligent controller featuring 7-inch color TFT-LCD touchscreen, 17-level backlight adjustment, real-time trend curves (setpoint vs. actual), and on-screen alarm diagnostics with timestamped event logs.
• Integrated load-powering capability (via rear-mounted terminal block) allows concurrent electrical biasing of DUTs during environmental stress testing—essential for HALT/HASS validation protocols.
• Four-point adjustable leveling feet and heavy-duty locking PU casters facilitate safe relocation and stable floor coupling—even on non-level surfaces.

Sample Compatibility & Compliance

The OK-TH-800 accommodates a broad range of physical sample configurations—including PCB assemblies, automotive ECUs, medical device housings, polymer components, and packaged consumer electronics—without requiring custom fixtures. Its internal dimensions (standard configuration: W800 × D800 × H800 mm) support typical industry-standard test specimens per IPC-J-STD-004, MIL-STD-810H, and AEC-Q200. All performance specifications are verified against national and international reference standards: GB/T 2423.1 (cold), GB/T 2423.2 (dry heat), GB/T 2423.3 (constant damp heat), GB/T 2423.4 (cyclic damp heat), and their IEC 60068-2 counterparts. The unit meets electromagnetic compatibility (EMC) Class B requirements per CISPR 11 and includes built-in over-temperature, over-humidity, compressor high-pressure, and phase-failure protections—fully documented in its Factory Acceptance Test (FAT) report.

Software & Data Management

Data integrity and regulatory traceability are ensured through the TEMI880 controller’s embedded audit trail functionality. All setpoints, sensor readings, alarm triggers, user logins, and parameter modifications are time-stamped and stored locally on SD card (optional USB export). The controller supports optional RS485/Modbus RTU or Ethernet TCP/IP interfaces for integration into centralized LIMS or MES platforms. Raw CSV-formatted logs can be imported directly into MATLAB, Python pandas, or JMP for statistical process control (SPC) analysis. While the base firmware does not include FDA 21 CFR Part 11 electronic signature modules, the system architecture permits third-party validation packages for GLP/GMP-regulated laboratories upon request.

Applications

• Accelerated life testing (ALT) of electronic assemblies under combined thermal cycling and humidity soak profiles.
• Material compatibility assessment—e.g., sealant adhesion loss, plastic warpage, or coating delamination at extreme RH levels.
• Pre-compliance screening for IEC 60068-2-14 (change of temperature), IEC 60068-2-30 (damp heat, cyclic), and JEDEC JESD22-A104.
• Validation of packaging integrity (e.g., blister packs, desiccant vials) under long-term storage conditions.
• Calibration lab support for reference sensor drift characterization across defined climate zones.
• Research-grade environmental aging studies in polymer science, battery electrochemistry, and aerospace composites.

FAQ

What is the standard internal volume of the OK-TH-800 chamber?
The nominal internal dimension is 800 mm (W) × 800 mm (D) × 800 mm (H), yielding approximately 512 L usable volume. Custom cavity sizes are available upon engineering review.
Does the chamber support programmable ramp-soak cycles?
Yes—the TEMI880 controller supports up to 120 segments per program, including linear ramps, dwell periods, and humidity modulation synchronized with temperature transitions.
Is remote monitoring possible without additional hardware?
Standard RS485 Modbus RTU enables basic telemetry; full web-based supervision requires optional Ethernet gateway module and dedicated server-side software license.
Can the unit operate continuously at −65 °C and 10 % RH?
The specified humidity range begins at 20 % RH; sub-20 % operation is not supported due to dehumidification system limitations. For dry nitrogen purging or ultra-low RH applications, consult factory for auxiliary gas interface options.
Are calibration certificates included with shipment?
A factory-issued as-built verification report (including temperature/humidity uniformity maps and controller calibration summary) is provided. NIST-traceable third-party calibration is available as an add-on service.