English Product Name

Overview

The OK-TH Series High-Low Temperature Cycling Environmental Test Chamber is an engineered solution for accelerated environmental stress testing of electronic components, automotive modules, aerospace subsystems, and industrial materials under rigorously controlled thermal and hygrothermal conditions. Based on the principle of forced-air convection with dual-stage refrigeration and precision PID-controlled heating, the chamber delivers stable, repeatable temperature and humidity profiles across wide operational ranges. Its architecture supports both steady-state exposure and programmable cycling protocols—including ramp-soak-hold sequences—enabling compliance verification against military, industrial, and international reliability standards. Designed for laboratory and production-line QA environments, the system prioritizes long-term stability, operator safety, and traceable test integrity.

Key Features

• Full-color 7-inch LCD touchscreen controller with intuitive graphical interface, supporting seamless English/Chinese language switching and real-time parameter monitoring.
• Dual-stage refrigeration system using environmentally compliant R404A/R23 mixed refrigerant, enabling rapid cooling down to –70°C while maintaining low acoustic emission (<65 dB(A) at 1 m).
• SUS#304 stainless steel construction for both inner and outer chambers—resistant to corrosion, oxidation, and cleaning agents used in GMP-compliant facilities.
• Multi-layer insulated viewing window with embedded conductive heating film prevents condensation and ensures unobstructed visual observation during sub-zero or high-humidity tests.
• High-integrity sealing system featuring dual-lip high-tensile silicone gaskets between door and frame, achieving leak rates <1.0 × 10⁻³ Pa·m³/s per ISO 10648-2.
• Integrated 50 mm diameter test port (left-side mounted) with removable rubber plug, facilitating external signal line or power feed-through without compromising chamber integrity.
• Comprehensive safety architecture: independent over-temperature cut-off, humidity sensor failure detection, compressor high-pressure shutdown, and real-time fault logging with on-screen alarm codes.

Sample Compatibility & Compliance

The OK-TH chamber accommodates a broad range of sample types—from PCB assemblies and lithium-ion battery packs to polymer housings and optical sensors—within its customizable internal volumes (80 L to 1000 L). Its thermal performance meets stringent uniformity and stability requirements defined in MIL-STD-810G Method 501.6 (high temperature), Method 502.6 (low temperature), and Method 507.6 (humidity cycling). It also satisfies IEC 60068-2-30 for cyclic damp heat, GB/T 2423.4 for alternating wet heat, and ASTM D4332 for conditioning of plastic specimens prior to mechanical testing. All control parameters—including setpoints, ramps, dwell times, and sensor readings—are timestamped and stored locally, supporting audit readiness under GLP and ISO/IEC 17025 frameworks.

Software & Data Management

The embedded controller provides non-volatile storage for up to 100 test programs, each supporting up to 99 segments with independent temperature/humidity setpoints, ramp rates, and hold durations. Data logging occurs at user-selectable intervals (1 s to 60 min), with all records saved to internal flash memory and exportable via USB 2.0 interface in CSV format. Optional PC-based software (OK-LogSuite v3.x) enables remote monitoring, multi-chamber synchronization, automated report generation (PDF/Excel), and integration with LIMS systems. Audit trails include operator ID, parameter changes, start/stop timestamps, and exception events—fully compliant with FDA 21 CFR Part 11 requirements when configured with user authentication and electronic signature modules.

Applications

• Qualification testing of avionics hardware per DO-160 Section 4 (Temperature) and Section 10 (Humidity).
• Thermal shock evaluation of solder joints and conformal coatings in electronics manufacturing.
• Accelerated aging studies of elastomers, adhesives, and composite laminates under combined thermal-hygric stress.
• Pre-conditioning of medical device packaging per ISO 11607-1 for sterile barrier validation.
• Environmental screening of EV battery modules under extreme cold-start and hot-soak scenarios.
• Material property stabilization prior to tensile, impact, or dielectric testing per ASTM D618.

FAQ

What temperature and humidity ranges are standard across OK-TH models?

Standard configurations support –20°C to +150°C (Model B) and 20–98% RH. Extended-range variants (Models C and D) achieve –40°C and –70°C minimum temperatures, respectively. Low-humidity options (5–98% RH) and ultra-low dew point capability are available as factory-installed options.

Is the chamber suitable for continuous operation in a certified cleanroom environment?

Yes—the SUS#304 interior, zero-oil compressor design, and absence of volatile organic outgassing materials meet ISO 14644-1 Class 7 (10,000) cleanroom compatibility requirements when installed with HEPA-filtered air supply and proper exhaust ducting.

Can test data be exported in formats compatible with statistical process control (SPC) platforms?

All logged data exports directly to CSV, which is natively ingestible by Minitab, JMP, and most MES/QMS platforms. Optional OPC UA server module enables real-time streaming to SCADA or Industry 4.0 analytics engines.

Does the system support third-party calibration traceability?

Yes—chambers ship with NIST-traceable calibration certificates for temperature and humidity sensors (per ISO/IEC 17025 accredited lab). Field recalibration services and annual verification packages are available under service agreement.

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

Compressor oil analysis and refrigerant pressure verification every 12 months; condenser coil cleaning every 3 months in dusty environments; gasket inspection and lubrication every 6 months; controller firmware updates per manufacturer release schedule.