OK-ZTH-512 Walk-in Environmental Test Chamber

Overview

The OK-ZTH-512 Walk-in Environmental Test Chamber is an engineered climate simulation system designed for full-scale, system-level environmental qualification testing. Unlike benchtop or upright chambers, it provides a fully accessible, walk-in workspace—functioning as a precisely controlled thermal environment “room” rather than a sealed cabinet. Its core operational principle relies on forced-air convection combined with dual-stage cascade refrigeration and high-capacity resistive heating to achieve stable, repeatable temperature profiles across its internal volume. This architecture enables rigorous evaluation of large-format, integrated, or multi-unit test articles under sustained extreme thermal conditions—including cold soak, hot soak, and programmable thermal cycling per ISO 16750-4, ASTM D4332, and IEC 60068-2-1/2/14. The chamber is structurally optimized for industrial laboratory or production-line integration, supporting validation protocols required in automotive, aerospace, energy storage, and telecommunications sectors where physical size, thermal mass, and real-world operational fidelity preclude use of compact alternatives.

Key Features

• Robust modular construction using double-skin steel panels with 150 mm thick polyurethane (PU) insulation (thermal conductivity ≤ 0.022 W/m·K), ensuring low heat leakage and long-term dimensional stability.
• Reinforced structural steel frame with adjustable leveling feet—designed for floor-mounted installation and compatible with standard concrete foundations.
• Large access door with triple-layer tempered glass observation window, anti-frost electric heating film, mechanical safety lock, and automatic door seal compression mechanism.
• Cascade refrigeration system comprising separate high-temperature and low-temperature compressor stages, enabling reliable operation down to −70 °C without liquid nitrogen dependency.
• High-volume axial-flow circulation fans with aerodynamically optimized ductwork to maintain temperature uniformity of ±2 °C throughout the working volume (per IEC 60068-3-5).
• Industrial-grade programmable logic controller (PLC) with 10.4″ color touchscreen HMI, supporting up to 99 programmable segments, ramp/soak profiles, and real-time deviation alarms.
• Dedicated cable ports (4 × Φ100 mm, silicone-sealed) with removable grommets for power, sensor, and data lines—maintaining thermal integrity during active testing.

Sample Compatibility & Compliance

The OK-ZTH-512 accommodates test specimens up to 700 × 800 × 700 mm (D×W×H), making it suitable for battery energy storage systems (BESS), EV powertrain modules, telecom cabinets, photovoltaic inverters, avionics racks, and multi-unit production batches. It supports load-induced heat dissipation up to 3 kW (user-specified), with optional refrigeration capacity derating calculations provided during quotation. The chamber meets structural and performance requirements aligned with ISO 16750-4 (road vehicles), MIL-STD-810H Method 502.7 (low temperature) and 501.7 (high temperature), and complies with CE marking directives for electromagnetic compatibility (2014/30/EU) and low voltage (2014/35/EU). All control firmware includes audit-trail logging capability compatible with GLP/GMP documentation workflows.

Software & Data Management

The embedded controller records temperature data at configurable intervals (1–60 sec) and stores ≥30 days of continuous history internally. Optional Ethernet/Wi-Fi connectivity enables remote monitoring via web browser or OPC UA interface. Data export is supported in CSV format with time-stamped, channel-labeled columns. For regulated environments, optional 21 CFR Part 11-compliant software add-ons provide electronic signatures, user role-based access control, and immutable record archiving. Calibration certificates traceable to NIM (National Institute of Metrology, China) are supplied with each unit, and annual recalibration services are available under service agreement.

Applications

• Automotive: Full-system validation of EV battery packs, ADAS ECUs, and HVAC performance under climatic extremes.
• Energy Storage: Thermal runaway propagation studies and cycle-life testing of grid-scale BESS enclosures per UL 9540A.
• Aerospace & Defense: Environmental screening of UAV airframes, radar subsystems, and satellite payload components per DO-160G Section 4.
• Telecom Infrastructure: Thermal stress testing of 5G base station cabinets, edge computing nodes, and fiber distribution hubs.
• Industrial Electronics: Burn-in qualification of PLC controllers, motor drives, and industrial PCs under accelerated temperature cycling (e.g., 500 cycles, −40 °C ↔ +85 °C).
• Materials Science: Batch aging of polymer composites, adhesives, and conformal coatings under controlled thermal exposure per ASTM G151.

FAQ

Is the OK-ZTH-512 suitable for humidity-controlled testing?
No—this model is a dry-temperature-only chamber. For combined temperature and humidity testing, consider the OK-ZTS series walk-in恒温恒湿 chambers.
What electrical supply is required?
Three-phase 380 V AC ±10%, 50 Hz, with dedicated 63 A circuit breaker and proper grounding per IEC 60364-5-54.
Can the chamber be relocated or expanded after installation?
Yes—the modular panel design allows disassembly, transport, and reinstallation; additional sections can be added to increase volume if structural support permits.
Does the system include validation documentation?
Yes—each unit ships with Factory Acceptance Test (FAT) report, temperature mapping summary (9-point uniformity test), and calibration certificate for primary sensor.
What maintenance is required for long-term reliability?
Quarterly inspection of condenser coils, annual refrigerant leak check, biannual verification of door seal integrity, and controller firmware updates as released by OK Instruments.