OK-FD-TH Series Environmental Test Chamber – High-Low Temperature & Humidity Climate Chamber

Overview

The OK-FD-TH Series Environmental Test Chamber is an engineered climate simulation system designed for precise, repeatable evaluation of material and component performance under controlled thermal and hygrothermal stress conditions. Based on forced-air convection principles with dual-stage refrigeration architecture, it delivers stable temperature and humidity profiles across a wide operational envelope—from sub-zero freezing (-40°C) to high-temperature baking (+150°C), coupled with programmable relative humidity control (20–98% RH). Its modular bimodal refrigeration system—comprising primary R404A and secondary R23 circuits—enables reliable low-temperature operation without frost accumulation over extended cycles (validated for continuous 1000-hour runs at -40°C). The chamber complies with core environmental testing standards including IEC 60068-2, GB/T 2423, and MIL-STD-810G methodology frameworks, making it suitable for qualification testing in electronics, automotive, aerospace, and polymer R&D laboratories.

Key Features

• 7-inch full-color TFT LCD touchscreen controller with intuitive bilingual (English/Chinese) interface, supporting both fixed-value and multi-segment programmable operation
• High-capacity data management: 250 user-defined test programs (12,500 total segments), real-time curve recording, and 250-day internal data storage with automatic timestamping
• Dual-layer thermal insulation combining rigid polyurethane foam (≥100 mm thick) and fiberglass blanket ensures low thermal leakage and energy efficiency—verified 20% power reduction versus conventional single-circuit designs
• Modular bimodal refrigeration system with hermetically sealed compressors (French Tecumseh or Chinese Taikang), air-cooled condensation, and leak-tested refrigerant circuits using DuPont-certified eco-friendly refrigerants (R404A/R23)
• Integrated safety architecture: over-temperature/over-humidity cutoffs, compressor high-pressure protection, phase failure detection, water-level monitoring, and door interlock with visual alarm
• Compact dual-tier structural layout minimizes floor footprint while maximizing usable chamber volume—ideal for space-constrained QC labs and university research facilities

Sample Compatibility & Compliance

The OK-FD-TH chamber accommodates a broad range of physical specimens—including PCB assemblies, lithium-ion battery cells, medical device housings, elastomeric seals, and composite laminates—via adjustable stainless-steel shelves and standardized 50 mm diameter cable/port access. All internal surfaces are fabricated from electropolished SUS304 stainless steel to prevent corrosion and facilitate cleaning under GLP-compliant maintenance protocols. The system meets essential regulatory prerequisites for environmental qualification: compliance with ISO/IEC 17025 documentation traceability requirements, compatibility with FDA 21 CFR Part 11–ready software add-ons (via optional Ethernet module), and alignment with ASTM D4332 (conditioning of plastics) and IEC 60068-2-1/2/14/30 test methods. Optional validation packages include IQ/OQ documentation templates and NIST-traceable sensor calibration certificates.

Software & Data Management

Standard configuration includes USB 2.0 and RS-232 interfaces for local data export: temperature/humidity curves, setpoint logs, and alarm history download directly to PC in native Excel (.xlsx) format—no proprietary viewer required. Optional LAN-enabled remote monitoring supports TCP/IP-based access via standard web browsers, enabling real-time parameter adjustment, live graph streaming, and event-triggered email alerts. Audit trail functionality (when paired with validated software extension) records all operator actions—including program edits, manual overrides, and calibration events—with user ID, timestamp, and IP address metadata—fully satisfying GLP and GMP electronic record retention mandates.

Applications

• Accelerated aging studies of polymers, adhesives, and packaging materials under cyclic thermal-hygric stress
• Pre-conditioning of electronic components prior to HALT/HASS testing or solderability assessment
• Stability testing of pharmaceutical primary packaging per ICH Q1 guidelines
• Environmental stress screening (ESS) of automotive ECUs and sensors per SAE J2245
• Material coefficient-of-thermal-expansion (CTE) correlation studies via dimensional metrology integration
• Reliability qualification of photovoltaic modules under damp heat (DH2000) and thermal cycling (TC200) profiles

FAQ

What temperature and humidity uniformity specifications are guaranteed across the working volume?

Temperature uniformity is maintained within ±2.0°C and humidity uniformity within ±3.0% RH across the entire test space, verified per IEC 60068-3-5 using calibrated reference sensors at nine spatial locations.

Is the chamber compatible with automated test sequencing and integration into MES or LIMS platforms?

Yes—via optional Modbus RTU or TCP protocol support, the controller enables bidirectional communication with factory automation systems for scheduled test initiation, status polling, and result ingestion.

Can the unit be customized for non-standard internal dimensions or special port configurations?

Absolutely—OK Instruments offers OEM engineering services for bespoke cavity geometry, additional observation windows, custom-sized feedthroughs, and explosion-proof variants (ATEX/IECEx certified upon request).

What is the expected service life of the refrigeration system under continuous operation?

With scheduled preventive maintenance (condenser coil cleaning every 6 months, refrigerant purity verification annually), the dual-compressor system demonstrates >15,000 hours MTBF in industrial QA environments.

Does the controller support data encryption and user role-based access control?

The base controller provides password-protected parameter modification; full AES-256 encryption and multi-tier user roles (Operator, Engineer, Administrator) are available with the validated LAN software package compliant with 21 CFR Part 11 Annex 11 requirements.