OK-TH Series Programmable Temperature and Humidity Environmental Test Chamber

Overview

The OK-TH Series Programmable Temperature and Humidity Environmental Test Chamber is an engineered solution for accelerated environmental stress testing of electronic components, aerospace subsystems, automotive ECUs, industrial coatings, and polymer-based materials. Based on precision-controlled convective air circulation and dual-stage refrigeration thermodynamics, the chamber delivers tightly regulated thermal and hygrothermal profiles in accordance with internationally recognized test standards. Its core architecture integrates a high-efficiency heat exchanger, PID-driven humidity generation via steam injection and solid-state desiccant drying, and real-time feedback from calibrated platinum resistance temperature sensors (PT100) and capacitive humidity transducers. Designed for laboratory-grade repeatability and long-term operational stability, the OK-TH series supports both steady-state conditioning and dynamic cycling protocols—including rapid temperature transitions and programmable humidity ramps—essential for qualification testing under MIL-STD-810, IEC 60068, and automotive OEM specifications.

Key Features

• 7-inch full-color LCD touchscreen controller with intuitive graphical interface and bilingual (English/Chinese) language support for seamless global operation
• Dual-stage hermetic refrigeration system using environmentally compliant R404A/R23 mixed refrigerant, enabling stable operation down to -70°C without external chillers
• Uniform airflow design with adjustable vane diffusers and rear-mounted centrifugal blower ensures ±0.5°C temperature uniformity and ±2.5% RH humidity uniformity across the entire working volume
• SUS#304 stainless steel construction (interior and exterior) resists corrosion, facilitates cleaning, and complies with ISO 14644 cleanroom-compatible surface requirements
• Multi-layer insulated observation window with integrated ITO (indium tin oxide) conductive film prevents condensation and enables unobstructed visual monitoring during high-humidity cycles
• Standard Ø50 mm test port on left side, sealed with silicone gasket, allows safe routing of power, signal, or sensor cables without compromising chamber integrity
• Comprehensive safety architecture including over-temperature cut-off, compressor high-pressure shutdown, humidity sensor fault detection, and emergency power disconnect relay

Sample Compatibility & Compliance

The OK-TH chamber accommodates diverse sample geometries—from PCB assemblies and battery modules to painted metal panels and elastomeric seals—via customizable internal shelving (two-tier SUS#304 trays included) and optional load-bearing turntables. All models meet structural and performance requirements outlined in GB/T 2423.1–2423.4 (IEC 60068-2 equivalents), GJB 150.3/4/9, and GB/T 10586. The system supports traceable calibration per ISO/IEC 17025 procedures and integrates with GLP/GMP-compliant validation protocols. Optional data logging modules provide time-stamped temperature/humidity records aligned with FDA 21 CFR Part 11 audit trail requirements when paired with validated software.

Software & Data Management

The embedded controller stores up to 100 user-defined test programs, each supporting multi-segment ramp/soak profiles with independent temperature and humidity setpoints, dwell times, and rate limits. USB export functionality enables CSV-formatted data retrieval for post-test analysis in MATLAB, Python, or statistical process control platforms. Optional PC-based software (OK-Link™) adds remote monitoring, real-time graphing, alarm notification via email/SMS, and automated report generation compliant with ISO 9001 documentation standards. All firmware updates are digitally signed and verified to ensure integrity and regulatory compliance.

Applications

• Qualification testing of avionics hardware per DO-160 Section 4 (Temperature) and Section 5 (Humidity)
• Accelerated aging studies of lithium-ion battery cells under combined thermal and humid conditions
• Coating adhesion and blistering evaluation for automotive OEM paint systems (e.g., VW TL 226)
• Validation of medical device packaging integrity per ASTM F1980 (Accelerated Aging)
• Reliability screening of semiconductor packages during HAST (Highly Accelerated Stress Test) protocol development
• Material property mapping of thermoplastics and composites across defined hygrothermal domains

FAQ

What temperature and humidity ranges are standard versus optional?

Standard configuration covers -20°C to +150°C and 20–98% RH. Extended low-temperature options (-40°C and -70°C) and extended humidity ranges (5–98% RH or 10–98% RH) are available as factory-configured options.

Is the chamber suitable for continuous 24/7 operation in a QA lab environment?

Yes. The dual-stage refrigeration system, reinforced bearing fans, and redundant safety circuits are rated for uninterrupted operation under Class II laboratory conditions per IEC 61000-4 immunity standards.

Can test data be exported in a format compatible with LIMS integration?

Raw time-series data is exportable as UTF-8 CSV files with UTC timestamps, column headers, and metadata fields—fully compatible with major LIMS platforms via scripted ingestion or OPC UA middleware.

Does the unit include calibration certificates traceable to NIST or equivalent national metrology institutes?

Factory calibration reports (as-shipped) are provided with PT100 and humidity sensor readings traceable to CNAS-accredited laboratories. On-site ISO/IEC 17025 calibration services are available upon request.

What maintenance intervals are recommended for optimal long-term performance?

Compressor oil inspection every 12 months, condenser coil cleaning every 6 months, and humidity system desiccant replacement every 18–24 months—detailed in the maintenance logbook supplied with each unit.