English Product Name

Overview

The OK-TH Series High-Speed Thermal Cycling Environmental Test Chamber is an engineered solution for accelerated reliability testing of electronic components, automotive modules, aerospace subsystems, and industrial materials under dynamically varying thermal-hygric stress conditions. Based on the principle of controlled thermal shock and cyclic thermal gradient exposure, the chamber subjects test specimens to rapid transitions between extreme temperature and humidity boundaries—inducing thermo-mechanical strain at material interfaces, solder joints, encapsulants, and layered assemblies. This accelerates the manifestation of latent defects such as microcracks, interfacial delamination, coefficient-of-thermal-expansion (CTE) mismatch failures, and moisture-induced corrosion—enabling early detection prior to field deployment. Designed in strict alignment with international environmental stress screening (ESS) protocols, the system supports both steady-state conditioning and programmable multi-step thermal-humidity profiles with precise ramp rate control, making it suitable for qualification per MIL-STD-810H, IEC 60068-2-14, and JEDEC JESD22-A104.

Key Features

• Programmable thermal ramp rates from 5 °C/min up to 25 °C/min—configurable per test segment to replicate real-world transient thermal loads.
• Integrated dual-chamber humidity control with precision steam generator and dehumidification via cold trap, enabling stable 20–98% RH operation across the full temperature range.
• SUS#304 stainless steel interior construction ensures long-term corrosion resistance, non-outgassing performance, and compliance with cleanroom-compatible material standards.
• Hermetically sealed dual-stage refrigeration system utilizing R404A (low-temp stage) and R23 (ultra-low-temp cascade stage), optimized for energy efficiency and low acoustic emission (<65 dB(A)).
• Intuitive touchscreen controller with real-time graphing, profile editing, alarm logging, and USB data export—supporting bilingual (English/Chinese) UI without firmware modification.
• Modular chamber architecture allows customization of internal dimensions (225 L to 1000 L), door orientation, sensor porting, and optional accessories including LN₂ backup cooling and Ethernet-based remote monitoring.

Sample Compatibility & Compliance

The OK-TH chamber accommodates a broad spectrum of test articles—from PCB assemblies and battery packs to medical device housings and polymer-based sensors—without requiring sample-specific fixtures. Internal airflow design ensures uniform thermal distribution per ISO 16750-4 Annex A and ASTM E1512 criteria. All models are certified to meet GB/T 2423.1 (cold), GB/T 2423.2 (heat), GB/T 2423.22 (temperature change), GJB 150.3–150.5 (military environmental testing), and GB/T 10589/11158/10592 technical specifications for environmental test equipment. Optional validation packages include IQ/OQ documentation templates aligned with GLP and ISO/IEC 17025 laboratory accreditation requirements.

Software & Data Management

The embedded controller provides full-cycle test management: profile creation (up to 99 segments, 999 cycles), real-time deviation monitoring, automatic hold/resume on power interruption, and timestamped event logging. Export formats include CSV and PDF reports compliant with FDA 21 CFR Part 11 when paired with optional audit-trail-enabled PC software. Remote access via Ethernet enables integration into centralized MES or QMS platforms using Modbus TCP or OPC UA protocols. All data—including sensor readings, setpoint tracking, and compressor status—is stored internally for ≥30 days and can be retrieved via USB or network transfer without interrupting active tests.

Applications

• Qualification testing of automotive ECUs per ISO 16750-4 and AEC-Q200 stress profiles.
• Thermal cycling validation of lithium-ion battery cells and modules under combined temperature/humidity stress.
• Failure mode analysis (FMA) of MEMS devices and optoelectronic packages during reliability growth testing.
• Process validation for conformal coating adhesion and solder paste reflow robustness.
• Environmental stress screening (ESS) in high-reliability manufacturing lines for defense and avionics suppliers.
• Material compatibility studies involving hygroscopic polymers, adhesives, and composite laminates.

FAQ

What is the maximum achievable ramp rate with full load inside the chamber?

The specified ramp rates (5–25 °C/min) are validated under standard loading conditions (≤30% internal volume occupancy with aluminum reference mass). Actual performance may vary slightly depending on specimen thermal mass and emissivity; derating curves are provided in the technical manual.

Does the system support automated humidity ramping synchronized with temperature transitions?

Yes—the controller supports concurrent, independent programming of temperature and humidity setpoints within each segment, enabling complex profiles such as “soak at −40 °C/10% RH → ramp to +85 °C/85% RH in 10 min” with linear or logarithmic interpolation.

Is third-party calibration and certification available?

Certified calibration services—including NIST-traceable sensor verification and uniformity mapping—are offered through authorized metrology partners with ISO/IEC 17025 accreditation. Calibration certificates include uncertainty budgets and compliance statements.

Can the chamber be integrated into an existing factory automation system?

All OK-TH models feature standard RS-485 (Modbus RTU), Ethernet (Modbus TCP), and optional analog I/O (0–10 V / 4–20 mA) for seamless PLC or SCADA integration. Protocol documentation and driver libraries are supplied with the system.

What maintenance intervals are recommended for the refrigeration system?

Compressor oil and filter replacement is scheduled every 12 months or 4,000 operating hours—whichever occurs first. Preventive maintenance kits and service bulletins are available through the global distributor network.