Other Brands OK-FD-TH Series Dual 85 Environmental Test Chamber

Overview

The OK-FD-TH Series Dual 85 Environmental Test Chamber is a precision-engineered climatic simulation system designed for accelerated reliability assessment under combined high-temperature, high-humidity stress conditions—commonly referred to as “85°C/85% RH” testing in electronics qualification protocols. It operates on the principle of forced-air convection with dual independent control loops for temperature and relative humidity, enabling stable and repeatable exposure profiles across wide operational ranges. The chamber supports both steady-state and cyclic test modes per internationally recognized environmental stress standards, making it suitable for pre-compliance screening of components and assemblies prior to formal qualification per AEC-Q200, JEDEC JESD22-A101, or IPC-9701. Its robust thermal architecture ensures minimal thermal lag and uniform chamber-wide distribution, critical for evaluating moisture ingress, solder joint integrity, delamination, and electrochemical migration phenomena in PCBAs, encapsulated semiconductors, and conformally coated modules.

Key Features

• 7-inch full-color TFT touchscreen controller with intuitive English/Chinese bilingual interface and real-time trend graphing capability
• Dual-layer insulation system comprising rigid polyurethane foam (≥80 mm thick) and high-density glass fiber blanket, minimizing thermal leakage and improving energy efficiency
• High-efficiency hermetic compressor (French or Tecumseh brand) with eco-friendly refrigerants R404A (low-temperature stage) and R23 (ultra-low subcooling stage), compliant with Montreal Protocol requirements (ODP = 0)
• SUS#304 stainless steel interior chamber and observation window with integrated conductive film heating to prevent condensation during high-humidity operation
• Double-gasketed door seal using high-tensile silicone rubber rated for continuous use from −40°C to +150°C, ensuring leak-tight integrity over 100,000 cycles
• Standard 50 mm diameter cable port (left-side mounted) with removable brass gland fitting, supporting external power/signal feedthrough without compromising chamber sealing
• Integrated safety monitoring suite including over-temperature cutoff, compressor high-pressure shutdown, heater dry-run protection, and real-time fault logging with audible/visual alarms

Sample Compatibility & Compliance

This chamber accommodates diverse sample geometries up to 700 × 600 × 600 mm (L×W×H), with optional multi-tier shelf configurations for vertical stacking of test specimens. It is routinely deployed in laboratories performing accelerated life testing per MIL-STD-810G Methods 501.6 (High Temperature), 502.6 (Low Temperature), and 507.5 (Humidity), as well as IEC 60068-2 series for commercial and industrial equipment validation. The unit meets traceability requirements for GLP and GMP environments when paired with optional calibrated NIST-traceable sensors and audit-ready data logs. All models are constructed to comply with CE marking directives (EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU), and support optional factory calibration certificates aligned with ISO/IEC 17025-accredited procedures.

Software & Data Management

The embedded controller provides local data storage for up to 100 test programs and 30 days of continuous 1-second interval logging (temperature/humidity/time stamp). USB export functionality enables seamless transfer of CSV-formatted datasets for post-processing in MATLAB, Python Pandas, or statistical analysis platforms such as JMP or Minitab. Optional Ethernet or RS485 communication ports allow integration into centralized lab management systems (LIMS) or SCADA networks, supporting Modbus RTU/TCP protocols. For regulated environments, optional software add-ons provide 21 CFR Part 11-compliant user access controls, electronic signatures, and immutable audit trails—including operator ID, parameter changes, alarm events, and manual overrides.

Applications

• Qualification testing of automotive ECUs, ADAS sensors, and battery management systems under extended thermal-hygrometric stress
• Moisture sensitivity level (MSL) determination per JEDEC J-STD-020 for surface-mount packages prior to reflow soldering
• Validation of conformal coating adhesion and dielectric stability under cyclic damp heat per IPC-CC-830B
• Long-term aging studies of OLED displays, flexible printed circuits, and MEMS packaging under elevated humidity
• Material compatibility screening for potting compounds, encapsulants, and thermal interface materials exposed to humidified thermal cycling
• Reliability growth testing of medical device PCBs per ISO 14971 risk management framework

FAQ

What does “Dual 85” refer to in this chamber’s designation?

It denotes the chamber’s capability to maintain simultaneous 85°C temperature and 85% relative humidity—a benchmark stress condition widely adopted in semiconductor and electronics reliability testing to accelerate failure mechanisms related to corrosion and hygroscopic swelling.
Can the chamber perform rapid temperature transitions between extreme setpoints?

Yes—standard models achieve typical ramp rates of ~4.0°C/min (heating) and ~1.0°C/min (cooling) within the specified operating envelope. Customized versions with enhanced refrigeration capacity and airflow optimization can deliver faster transitions upon request.
Is third-party calibration documentation available?

Yes. Factory-installed PT100 sensors are supplied with optional NIST-traceable calibration certificates issued by an ILAC-MRA accredited laboratory, including as-found/as-left data and uncertainty budgets per ISO/IEC 17025.
How is humidity controlled at low temperatures (e.g., below 10°C)?

The system employs a dedicated steam-generation humidifier with PID-controlled nickel-chromium heating elements and ceramic insulation, ensuring stable RH delivery down to 20% even at sub-zero chamber setpoints, validated via chilled-mirror hygrometer reference.
Does the controller support automated test sequencing and pass/fail logic?

Yes—the built-in programming engine supports up to 99 segments per cycle, including dwell, ramp, and hold phases, with configurable pass/fail thresholds and automatic test termination upon violation of user-defined limits.