OK-FD-TH Series Low-Temperature Low-Humidity Environmental Test Chamber

Overview

The OK-FD-TH Series Low-Temperature Low-Humidity Environmental Test Chamber is an engineered solution for precise, repeatable simulation of extreme climatic conditions in laboratory and industrial quality assurance environments. Designed around a dual-stage refrigeration architecture and integrated humidity control, it delivers stable operation across wide thermal and hygrometric ranges — from -40°C to +150°C and 20–98% RH — with high reproducibility under dynamic and static test profiles. Its core function is to subject materials, components, and finished products to accelerated environmental stress, enabling evaluation of thermal expansion, condensation resistance, seal integrity, material embrittlement, and long-term reliability per international qualification protocols. The chamber employs a modular, maintenance-optimized design that separates refrigerant circuits, water management, and electrical distribution to minimize cross-contamination risk and ensure operational continuity during extended validation runs.

Key Features

• Dual-layer insulated construction using rigid polyurethane foam and fiberglass insulation, achieving low thermal leakage and energy-efficient stabilization.
• Modular binary refrigeration system with hermetically sealed compressors (French or Tecumseh origin), compatible with ozone-friendly R404A/R23 refrigerants (ODP = 0).
• 7-inch TFT color LCD touchscreen controller supporting bilingual (English/Chinese) interface, real-time graphical display of temperature/humidity curves, and programmable sequences up to 250 cycles and 12,500 segments.
• Integrated data acquisition with onboard 250-day historical logging, USB and RS-232 interfaces for direct export to Excel-formatted reports, and optional LAN-based remote monitoring.
• Enhanced safety architecture including over-temperature, over-humidity, compressor high-pressure, water-level, and electrical leakage protections — all independently monitored and interlocked.
• Large observation window with double-glazed, anti-fog tempered glass; removable stainless-steel (SUS#304) interior chamber; drawer-type water reservoir for easy cleaning and extended runtime.

Sample Compatibility & Compliance

The OK-FD-TH series accommodates diverse sample geometries via customizable internal dimensions (80 L, 150 L, and 252 L configurations), with standard 50 mm diameter cable/port access and adjustable SUS#304 shelves. It meets the full scope of environmental test standards required for product certification and regulatory submission, including GB/T2423.1–2423.4 (cold, dry heat, damp heat, cyclic damp heat), GB/T2423.22 (temperature change), IEC60068-2-1/-2 (cold/heat testing), and GJB150.3/4/9 (military-grade thermal and humidity endurance). Its performance stability — ±0.5°C temperature fluctuation and ±2.5% RH fluctuation — supports GLP-compliant test documentation when paired with audit-trail-enabled software add-ons. While not inherently 21 CFR Part 11 compliant out-of-the-box, the controller’s data export architecture and timestamped logging support integration into validated electronic lab notebook (ELN) or LIMS systems.

Software & Data Management

The embedded controller provides native support for both fixed-value and multi-segment programmed testing, with automatic power-loss recovery and scheduled start/stop functionality. All test parameters — setpoints, actual readings, alarms, and timestamps — are stored internally and retrievable via USB flash drive. Exported CSV/Excel files include columnar headers aligned with ISO/IEC 17025 reporting conventions (e.g., “Timestamp”, “Chamber_Temp_C”, “Chamber_RH_Pct”, “Deviation_Temp_C”). Optional Ethernet module enables TCP/IP communication for centralized chamber fleet monitoring within enterprise QA networks. Firmware updates are delivered via secure USB load, ensuring version traceability and configuration integrity.

Applications

This chamber serves critical roles across electronics (PCB solder joint reliability, battery thermal runaway screening), automotive (ECU housing sealing, sensor calibration drift analysis), aerospace (composite moisture absorption kinetics), medical device packaging (sterility barrier validation under cold-dry storage), and polymer R&D (crystallinity shift assessment below Tg). It is routinely deployed in third-party testing labs accredited to ISO/IEC 17025, as well as in-house QC departments performing incoming inspection, process validation, and accelerated life testing per IPC-9701, AEC-Q200, and MIL-STD-810G methodologies.

FAQ

What temperature and humidity ranges are supported?

Standard configurations cover -40°C to +150°C and 20–98% RH, with model-specific variants (A/B/C) offering different low-temperature limits.

Is the controller capable of automated data export for regulatory audits?

Yes — all test logs export to timestamped Excel files with raw sensor values, deviations, and event flags, facilitating traceability in GLP/GMP environments.

Can the chamber be integrated into a facility-wide environmental monitoring system?

With the optional LAN interface module, it supports Modbus TCP or custom API integration for centralized telemetry and alarm aggregation.

What refrigerant is used, and does it comply with global environmental regulations?

R404A and R23 are employed — both zero-ozone-depletion-potential (ODP = 0) refrigerants approved under the Montreal Protocol and EU F-Gas Regulation.

How is calibration verification performed?

The chamber includes dual PT100 sensors (control + independent monitoring) and supports external reference probe inputs for periodic verification against NIST-traceable standards.