Walk-in Environmental Test Chamber – OK-STH Series by Other Brands

Overview

The OK-STH Series Walk-in Environmental Test Chamber is an industrial-grade, modular climatic test system engineered for precise and repeatable evaluation of large-scale components, subassemblies, and finished products under controlled temperature and humidity conditions. Designed in accordance with international environmental testing standards—including IEC 60068-2-2 (high-temperature), MIL-STD-810D/GJB 150.3–4 (military-grade thermal cycling), and GB/T 5170.2 (Chinese national verification procedures)—this chamber delivers high reproducibility across wide operational ranges. Its core architecture employs a dual-refrigerant cascade cooling system (R404A/R23), eliminating ozone-depleting substances while maintaining stable sub-zero performance down to –60°C. The ceiling-mounted, low-velocity air distribution system ensures uniform thermal and hygrometric profiles—critical for validating thermal expansion, condensation resistance, seal integrity, and material aging behavior in aerospace, automotive, electronics, and defense applications.

Key Features

• Modular panel construction using PU foam-insulated, interlocking walk-in panels—enabling rapid on-site assembly, reconfiguration, or relocation without structural modification.
• Stainless steel (SUS304) inner chamber walls and floor pan resist corrosion and facilitate cleaning; outer cladding uses pre-painted galvanized steel for durability and aesthetic consistency.
• Dual-stage refrigeration system with semi-hermetic compressors and finned-tube evaporators serving both cooling and dehumidification functions—ensuring consistent dew point control and moisture removal efficiency.
• High-intensity explosion-proof interior lighting with large observation window (tempered glass, anti-fog coating) enables real-time visual inspection during extended tests without compromising chamber integrity.
• Integrated safety architecture includes redundant thermal cutoffs, compressor overpressure/overheat sensors, steam generator dry-run protection, water-level monitoring, and non-fuse overcurrent breakers—all logged with timestamped event history.
• Controller supports programmable ramp-soak cycles, multi-segment profiles, and alarm-triggered data capture; optional Ethernet or RS485 interfaces enable integration into centralized lab management systems (LIMS) or SCADA networks.

Sample Compatibility & Compliance

The OK-STH chamber accommodates full-size automotive ECUs, avionics enclosures, battery packs, HVAC units, and military-grade chassis—up to custom dimensions exceeding 5 m³. Its internal volume is fully scalable per client specification, with standardized access doors (≥900 mm width) and reinforced flooring (Q235 structural steel frame). All thermal and humidity performance metrics are verified per GB/T 5170.2–1996 and ISO/IEC 17025-accredited calibration protocols. The system meets electromagnetic compatibility (EMC) requirements per GB/T 18268 and supports GLP-compliant operation when paired with audit-trail-enabled controllers (optional FDA 21 CFR Part 11 software module available).

Software & Data Management

The standard controller provides real-time display of chamber setpoints, actual values, deviation alarms, and cycle progress via a 7-inch LED touchscreen. Data logging occurs at user-defined intervals (1 sec to 60 min), stored internally for up to 30 days or streamed continuously via optional analog/digital I/O modules. Export formats include CSV and PDF reports compliant with ISO/IEC 17025 documentation requirements. For enterprise integration, the chamber supports Modbus TCP and OPC UA protocols—enabling seamless synchronization with MES platforms, quality management systems (QMS), and automated test execution frameworks.

Applications

• Accelerated life testing of lithium-ion battery modules under thermal stress (–40°C to 85°C cycling per UN 38.3 and IEC 62660-2).
• Environmental stress screening (ESS) of printed circuit board assemblies (PCBAs) per IPC-9701 and JEDEC JESD22-A108.
• Validation of gasket and seal performance under combined thermal-hygrometric load (e.g., IP67/IP6K9K certification support).
• Pre-conditioning of composite materials prior to mechanical testing (ASTM D5229, ISO 527-4).
• Storage stability assessment of pharmaceutical packaging under ICH Q1A(R2) long-term and accelerated conditions.
• Military equipment qualification per MIL-STD-810G Method 502.6 (low temperature) and Method 501.6 (high temperature).

FAQ

What is the standard lead time for a custom-sized OK-STH chamber?
Typical manufacturing and commissioning lead time is 12–16 weeks from order confirmation, inclusive of factory acceptance testing (FAT) and on-site installation supervision.
Can the chamber be upgraded to support salt spray or UV exposure integration?
Yes—modular design allows retrofitting of auxiliary subsystems including mist nozzles (ASTM B117), UV-A/B lamps (ISO 4892-3), or combined thermal-hygro-salt cycling configurations upon engineering review.
Is third-party calibration certification included?
Calibration certificates traceable to NIM (China National Institute of Metrology) or equivalent national metrology institutes are available as an optional service—valid for 12 months post-installation.
Does the controller support remote diagnostics and firmware updates?
Yes—the embedded controller supports secure SSH-based remote access for troubleshooting and over-the-air firmware upgrades, subject to customer network security policies.
What maintenance schedule is recommended for sustained accuracy?
Biannual preventive maintenance is advised: refrigerant charge verification, sensor recalibration (temperature/humidity), condensate drain line inspection, and electrical contact torque validation per IEC 60204-1.