English Product Name

Overview

The OK-TH Series High-Low Temperature Cycling Environmental Test Chamber is an engineered solution for accelerated environmental stress screening (ESS), reliability validation, and qualification testing of electronic components, automotive modules, aerospace subsystems, and industrial materials. Designed in accordance with the fundamental principles of thermodynamic control and thermal mass management, the chamber employs a dual-stage refrigeration architecture coupled with precision PID-controlled heating elements to achieve stable, repeatable, and traceable temperature profiles across wide operational ranges. Its core function is to simulate real-world thermal cycling conditions—including rapid transitions between extreme cold and high-temperature environments—to evaluate thermal expansion mismatch, solder joint integrity, seal performance, and long-term material stability. The system supports both steady-state and programmable ramp-hold cycling protocols, enabling compliance-driven test execution per MIL-STD-810, IEC 60068-2, and GB/T 2423 standards.

Key Features

• Microprocessor-based color touch-screen controller with intuitive GUI, supporting seamless English/Chinese language switching and real-time parameter monitoring.
• Dual-stage refrigeration system using environmentally compliant R404A (low-temp stage) and R23 (ultra-low-temp stage) refrigerants, delivering consistent cooling performance down to –70°C without oil carryover or frost accumulation.
• Full-spectrum internal construction from SUS#304 stainless steel—resistant to corrosion, non-outgassing, and compatible with cleanroom and GLP-compliant laboratory environments.
• Triple-sealed observation window featuring multi-layer tempered glass with embedded indium tin oxide (ITO) conductive film for anti-fogging and unobstructed visual inspection during operation.
• Integrated safety architecture including over-temperature, over-humidity, compressor high-pressure, phase failure, and door-open interlock protection—all triggering immediate power cutoff and on-screen fault diagnostics.
• Standard 50 mm diameter test port (left-side mounted) with silicone gasket, enabling secure feedthrough for power cables, sensor leads, or pneumatic lines without compromising chamber integrity.

Sample Compatibility & Compliance

The OK-TH chamber accommodates samples up to 1000 L internal volume (OK-TH-1000 model), with configurable shelf configurations and load-bearing stainless steel trays rated for ≥15 kg per level. Its thermal performance meets the metrological requirements of ISO/IEC 17025-accredited calibration laboratories when operated within specified ambient conditions (15–30°C, ≤80% RH). The unit complies with electromagnetic compatibility (EMC) per EN 61326-1 and safety standards per IEC 61010-1. It supports full traceability for regulated industries through optional audit trail logging, user access levels, and electronic signature readiness—aligning with FDA 21 CFR Part 11 and EU Annex 11 expectations where integrated software is deployed. Certified test reports are available for GJB 150.3/150.4, IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-78 (steady-state humidity), and IEC 60068-2-30 (cyclic humidity).

Software & Data Management

The embedded controller provides local data logging at user-defined intervals (1–600 sec), storing up to 100 test programs with 100 segments each (ramp, hold, loop). Optional PC-based software enables remote monitoring, real-time graphing, automated report generation (PDF/CSV), and export of raw time-series datasets with timestamp, setpoint, actual value, and alarm status columns. All logged data includes device ID, operator ID, and test ID metadata. When configured with network connectivity, the system supports SNMP traps and Modbus TCP integration into centralized MES or SCADA platforms. Audit trail functionality records all parameter changes, program starts/stops, and user logins—retained for ≥18 months unless manually purged under documented SOP.

Applications

• Thermal cycling qualification of PCB assemblies per IPC-9701 and JEDEC JESD22-A104.
• Environmental stress screening (ESS) of avionics enclosures prior to HALT/HASS.
• Material coefficient of thermal expansion (CTE) characterization under controlled humidity gradients.
• Validation of battery pack thermal management systems across charge/discharge cycles.
• Stability testing of pharmaceutical packaging under ICH Q1A(R3) climatic zone conditions.
• Accelerated aging of elastomeric seals, adhesives, and composite laminates.

FAQ

What temperature and humidity ranges are standard versus optional?

Standard configuration covers –20°C to +150°C and 20–98% RH. Models with –40°C or –70°C minimum temperature, and extended humidity range (5–98% RH), are factory-configured options requiring advance specification.

Is the chamber suitable for continuous 24/7 operation?

Yes—designed for Class II industrial duty cycle with reinforced compressor cooling, redundant fan controls, and thermal overload protection. Recommended maintenance interval is every 1,500 operating hours or annually, whichever occurs first.

Can the test port be customized for larger diameters or multiple ports?

Yes—custom port configurations (e.g., 80 mm, dual 50 mm, or NPT-threaded feedthroughs) are available as OEM engineering options; lead time and structural reinforcement requirements apply.

Does the system support third-party calibration traceability?

Yes—internal PT100 sensors are calibrated to NIST-traceable standards. Factory calibration certificates (as-tested) and uncertainty budgets are provided. On-site verification services are available via ISO/IEC 17025-accredited partners.

What power infrastructure is required for the OK-TH-1000 model?

AC 380 V ±5%, 3-phase 5-wire, 50 Hz ±0.5 Hz, with dedicated 63 A circuit breaker and proper grounding per IEC 60364-5-54. Voltage stabilization is recommended if supply fluctuation exceeds ±5%.