Other Brands OK-TH Series High-Low Temperature Cycling Test Chamber

Overview

The OK-TH Series High-Low Temperature Cycling Test Chamber is an engineered environmental simulation system designed for precise, repeatable thermal cycling validation of electronic components, automotive modules, aerospace subsystems, and industrial materials. It operates on a dual-stage refrigeration architecture utilizing R404A/R23 eco-friendly refrigerants and a fully sealed, low-noise compressor assembly sourced from Europe and North America—ensuring stable operation across extreme thermal gradients. Unlike basic thermal chambers, this series supports programmable ramp-hold cycles, stepwise transitions between sub-zero and elevated temperatures, and optional humidity integration—enabling full compliance with MIL-STD-810G, IEC 60068-2, and GB/T 2423 standards for environmental stress screening (ESS) and accelerated reliability testing. Its microprocessor-based controller delivers real-time monitoring of chamber dynamics, including thermal inertia compensation and PID-tuned regulation to minimize overshoot during rapid transitions.

Key Features

• High-resolution 7-inch color touchscreen controller with intuitive GUI, supporting seamless English/Chinese language switching and multi-segment profile programming.
• Robust chamber construction using double-walled SUS#304 stainless steel for both interior and exterior surfaces—resistant to corrosion, thermal fatigue, and chemical exposure in QC labs and production environments.
• Optically optimized viewing window composed of multi-layer laminated tempered glass with integrated conductive film heating—eliminates condensation and ensures unobstructed observation during low-temperature or high-humidity operation.
• Dual-level sealing system: high-tensile silicone gasket at door interface plus secondary compression seal—achieving leak rates <1.0 × 10⁻⁴ Pa·m³/s under vacuum-assisted verification per ISO 10648-2.
• Standard 50 mm diameter feedthrough port (left-side mounted) with removable blanking plate—compatible with external power feeds, thermocouple leads, and signal cables up to 8 mm outer diameter.
• Integrated safety architecture: independent over-temperature/over-humidity cut-off, compressor discharge temperature monitoring, phase failure protection, and real-time fault logging with timestamped event codes displayed directly on the controller interface.

Sample Compatibility & Compliance

The OK-TH chamber accommodates test specimens ranging from PCB assemblies and battery packs to molded polymers and sensor housings. Internal dimensions span 80 L to 1000 L (OK-TH-80 to OK-TH-1000), with customizable internal configurations—including adjustable stainless steel shelves, leveling casters, and fixed leveling feet. All models meet structural and operational requirements for MIL-STD-810G Method 501.6 (High Temperature), Method 502.6 (Low Temperature), and Method 507.6 (Temperature Shock). Humidity-enabled variants comply with IEC 60068-2-78 (steady-state damp heat) and IEC 60068-2-30 (cyclic damp heat), supporting GLP/GMP-aligned validation protocols when paired with IQ/OQ documentation packages. The chamber’s thermal uniformity (±0.5°C) and humidity uniformity (±2.5% RH) are verified per IEC 60068-3-5 and ASTM E2297-22 calibration guidelines.

Software & Data Management

The embedded controller supports USB data export (CSV format) of time-stamped temperature/humidity logs at user-defined intervals (1 s to 60 min). Optional Ethernet or RS-485 interfaces enable integration into centralized lab management systems (LIMS) or SCADA networks. For regulated environments, optional software modules provide 21 CFR Part 11-compliant audit trails—including operator ID, parameter changes, profile execution history, and electronic signatures. Calibration certificates traceable to NIST or national metrology institutes are available upon request, and all firmware updates undergo version-controlled release validation per ISO/IEC 17025 Annex A.4.

Applications

• Thermal shock evaluation of solder joints and conformal coatings per IPC-9701 and JEDEC JESD22-A104.
• Pre-conditioning of lithium-ion cells prior to electrical performance testing (UN 38.3, IEC 62133).
• Material aging studies on elastomers, adhesives, and composite laminates under combined thermal-humidity stress.
• Environmental qualification of avionics enclosures per DO-160 Section 4 and RTCA/DO-160G.
• Reliability screening of automotive ECUs and ADAS sensors under ISO 16750-4 temperature cycling profiles.
• Validation of packaging integrity for sterile medical devices under accelerated aging per ISO 11607-1.

FAQ

What temperature and humidity ranges are standard versus optional?
Standard models support −20°C to +150°C with 20–98% RH. Extended low-temperature options (−40°C and −70°C) and expanded humidity range (5–98% RH) are available as factory-configured options.
Is the chamber suitable for continuous operation in a Class 10,000 cleanroom environment?
Yes—the SUS#304 construction, zero-oil compressor design, and absence of internal paint or organic gasket materials meet ISO 14644-1 particle generation requirements when installed with HEPA-filtered air supply and proper grounding.
Can the controller log data independently without external PC connection?
Yes—the onboard memory stores ≥30 days of 1-second-interval data. Export is performed via USB flash drive without requiring host software.
Does the system support custom test profiles with dwell times, ramps, and conditional branching?
Yes—the controller supports up to 99 segments per profile, with programmable ramp rates, hold durations, and loop counts. Conditional jumps based on measured chamber conditions are supported in advanced firmware versions.
What maintenance intervals are recommended for long-term reliability?
Compressor oil analysis every 2,000 operating hours; refrigerant circuit leak check annually; door gasket inspection and cleaning quarterly; controller calibration verification semiannually per ISO/IEC 17025.