English Product Name

Overview

The OK-TH Series Rapid Temperature Change Environmental Test Chamber is a precision-engineered thermal stress screening system designed for accelerated reliability testing of electronic components, automotive modules, aerospace subsystems, and industrial materials. It operates on the principle of controlled, high-rate thermal cycling—inducing cyclic expansion and contraction in test specimens through programmable transitions between extreme temperature limits. This accelerates latent defects such as interfacial delamination, solder joint fatigue, coefficient-of-thermal-expansion (CTE) mismatch failures, and moisture-induced degradation. Unlike standard thermal chambers, the OK-TH series delivers repeatable ramp rates up to 25 °C/min across its full operational range (−70 °C to +150 °C), enabling compliance with rigorous military, automotive, and industrial qualification protocols—including temperature shock (GJB 150.5), rapid transition (GB/T 2423.22), and combined temperature/humidity cycling.

Key Features

• High-fidelity dual-stage refrigeration architecture using OEM-certified hermetic compressors and environmentally compliant R404A/R23 blended refrigerant for stable low-temperature performance down to −70 °C
• Programmable ramp rate selection from 5 to 25 °C/min, calibrated and verified per IEC 60068-3-5 for thermal transition accuracy
• SUS#304 stainless steel interior chamber with seamless welds and non-porous surface finish—resistant to corrosion, condensation buildup, and cleaning agent exposure
• Advanced touchscreen controller with real-time graphing, multi-segment profile programming, and data logging at configurable intervals (1–60 sec)
• Integrated humidity control system with steam generator and solid-state dry-air bypass—capable of sustaining 20–98% RH with ±2.5% RH stability (±3.0% RH uniformity above 75% RH)
• Comprehensive safety architecture: over-temperature cutoff, compressor high-pressure protection, door interlock, and independent mechanical thermostat backup

Sample Compatibility & Compliance

The OK-TH chamber accommodates samples ranging from PCB assemblies and battery packs to sealed enclosures and molded polymer housings. Internal dimensions span 225 L to 1000 L (50×75×60 cm to 100×100×100 cm), with optional custom configurations available for oversized or fixture-mounted units. All models meet structural and metrological requirements of GB/T 10589 (low-temperature chambers), GB/T 11158 (high-temperature chambers), and GB/T 10592 (combined environmental test chambers). Thermal performance validation includes traceable calibration per ISO/IEC 17025-accredited procedures, with documented uncertainty budgets for temperature and humidity channels. The system supports audit-ready operation under GLP and GMP frameworks, including optional 21 CFR Part 11-compliant electronic signatures and audit trail functionality.

Software & Data Management

The embedded controller firmware enables full-cycle test definition—including dwell times, ramp profiles, hold conditions, and conditional branching based on sensor feedback. Exportable data logs (CSV/Excel format) include timestamped temperature, humidity, setpoint deviation, and alarm history. Optional PC-based software provides remote monitoring via Ethernet, automated report generation (PDF/HTML), statistical process control (SPC) overlays, and integration with MES/QMS platforms via Modbus TCP or OPC UA. All configuration changes and operator actions are recorded with user ID, timestamp, and parameter delta—ensuring full traceability for internal audits or regulatory submissions.

Applications

• Thermal shock qualification of automotive ECUs per AEC-Q200 and ISO 16750-4
• Accelerated life testing of lithium-ion battery cells and modules under dynamic thermal-humidity stress
• Reliability screening of avionics hardware against MIL-STD-810H Method 503.5
• Material compatibility testing for conformal coatings, adhesives, and encapsulants
• Process validation of reflow soldering and curing cycles in electronics manufacturing
• Environmental stress screening (ESS) and HALT/HASS pre-screening prior to formal qualification

FAQ

What standards does the OK-TH chamber support out of the box?

It natively complies with GB/T 2423.1, GB/T 2423.2, GB/T 2423.22, GJB 150.3–150.5, GB 10589, GB 11158, and GB 10592. Custom firmware patches can be applied for ASTM D4332 or IEC 60068-2-14 upon request.

Can the chamber operate continuously at −70 °C with 98% RH?

No. At sub-zero temperatures, humidity control is physically constrained by dew point limitations; the specified humidity range (20–98% RH) applies only above +10 °C. Below 0 °C, dehumidification mode is active and RH values are not actively controlled.

Is third-party calibration certification included with shipment?

A factory calibration certificate (traceable to NIM, China) is provided. ISO/IEC 17025-accredited field calibration with uncertainty reporting is available as an add-on service.

What is the typical lead time for a custom-sized OK-TH chamber?

Standard models ship within 6–8 weeks. Custom configurations (e.g., non-standard dimensions, extended temperature range, or special ingress protection) require 12–16 weeks from order confirmation and final mechanical drawing sign-off.

Does the controller support password-protected user roles?

Yes. Four hierarchical roles are implemented: Operator, Engineer, Calibration Technician, and Administrator—each with granular permissions for profile editing, parameter adjustment, calibration access, and system configuration.