English Product Name

Overview

The OK-FD-TH Series Environmental Test Chamber is a precision-engineered climatic chamber designed for rigorous thermal and hygrothermal stress testing of electronic components, automotive parts, aerospace materials, and industrial packaging under controlled high-low temperature and humidity conditions. Based on the Couette-type air circulation principle with forced convection and dual-stage refrigeration architecture, the system delivers stable, repeatable environmental profiles across wide operational ranges. Its modular two-circuit refrigeration system—comprising primary (R404A) and secondary (R23) stages—enables reliable sub-zero operation down to –40°C while maintaining precise humidity control between 20% and 98% RH. The chamber meets fundamental requirements for accelerated life testing, qualification screening, and environmental simulation per international standards including IEC 60068-2, MIL-STD-810, and GJB 150, supporting both steady-state and programmable cyclic test protocols.

Key Features

• Dual-circuit refrigeration system with independent R404A (high-temp stage) and R23 (low-temp stage) circuits, enabling rapid cooling to –40°C and minimizing thermal lag during transitions.
• Hermetically sealed French or Tecumseh compressors with air-cooled condensation, integrated with leak-detection via water immersion testing at factory commissioning to ensure long-term refrigerant integrity.
• Double-layer insulation combining rigid polyurethane foam (≥100 mm thickness) and fiberglass lining, reducing thermal bridging and improving energy efficiency by >22% versus single-layer designs.
• Stainless steel (SUS304) inner chamber and corrosion-resistant exterior (electro-galvanized steel with epoxy-polyester powder coating), compliant with ISO 9227 salt spray resistance requirements for structural durability.
• 7-inch TFT LCD touchscreen controller with real-time graphing, multi-segment ramp-soak programming, data logging (internal SD card + USB export), and configurable alarm thresholds for temperature, humidity, and safety interlocks.
• Integrated safety architecture: over-temperature cut-off, compressor high-pressure protection, phase failure detection, dry-heater overheat prevention, and grounded stainless-steel water reservoir with auto-drain function.

Sample Compatibility & Compliance

The OK-FD-TH accommodates samples up to 700 × 600 × 600 mm (interior volume: 252 L) across three standard configurations (80 L, 150 L, 252 L). Optional double- or triple-tier shelf systems allow vertical stacking without compromising airflow uniformity. All models are validated for compliance with 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 GB/T 2423.22 (temperature change). Electrical safety conforms to IEC 61000-4 series EMC immunity and IEC 61010-1 for laboratory equipment. For regulated industries, the controller supports optional audit trail configuration (meeting FDA 21 CFR Part 11 requirements when paired with external validation software and user access controls).

Software & Data Management

The embedded controller firmware provides native support for up to 99 programmable test profiles, each with 99 segments (ramp, soak, cycle). Real-time monitoring includes temperature/humidity curves, deviation alarms, and event logs (start/stop, alarm triggers, manual overrides). Data export is supported via USB 2.0 in CSV format compatible with MATLAB, Excel, and statistical process control (SPC) platforms. Optional PC-based software (OK-EnviroLink™) enables remote supervision, centralized fleet management, report generation (PDF/Excel), and integration with LIMS or MES systems via Modbus TCP or OPC UA protocols. All logged data retains time-stamped metadata with operator ID and calibration status flags.

Applications

This chamber serves critical roles in product development and quality assurance workflows: thermal cycling validation of PCBAs and semiconductor packages; humidity-induced corrosion testing of metallic enclosures; storage stability assessment of pharmaceutical primary packaging per ICH Q1A(R2); cold-start performance evaluation of automotive ECUs; and environmental stress screening (ESS) per Telcordia GR-63-CORE for telecom hardware. It is routinely deployed in ISO/IEC 17025-accredited labs conducting third-party certification testing for CE, CCC, and UL recognition.

FAQ

What temperature and humidity ranges are achievable across models?

All OK-FD-TH models support –40°C to +150°C and 20–98% RH. Specific operating limits depend on selected configuration (e.g., Model OK-FD-TH-80 achieves –40°C with optional low-temp package; standard base model starts at –20°C).

Is the chamber suitable for continuous 24/7 operation in production QA labs?

Yes—designed for Class II industrial duty cycles, with reinforced compressor mounts, redundant fan motors, and thermal overload protection enabling uninterrupted operation for ≥10,000 hours MTBF.

Can the controller be validated for GLP/GMP environments?

The base controller supports IQ/OQ documentation templates. Full 21 CFR Part 11 compliance requires optional firmware upgrade, electronic signature module, and external validation services—available through OK-certified partners.

How is refrigerant leakage prevented during long-term use?

Each unit undergoes mandatory water-submersion leak testing pre-shipment, followed by helium mass spectrometry verification on all welded joints and brazed connections.

Are custom modifications available for non-standard sample geometries or interfaces?

Yes—custom port configurations (e.g., multiple Ø50 mm or Ø100 mm feedthroughs), extended cable trays, vibration-isolated mounting plates, and EMI-shielded viewing windows are offered as factory-installed options.