OK-STH-12.0005m² Walk-in Environmental Test Chamber
| Brand | OK Instruments |
|---|---|
| Origin | Guangdong, China |
| Manufacturer Type | Direct Manufacturer |
| Origin Category | Domestic |
| Model Code | OK-STH-12.0005m² |
| Internal Dimensions (D×W×H) | 3000 × 2000 × 2000 mm |
| Temperature Range Options | A: 0°C to +85°C |
| B | −20°C to +85°C |
| C | −40°C to +85°C |
| D | −60°C to +85°C |
| E | −70°C to +85°C |
| Temperature Uniformity | ±3°C |
| Temperature Control Accuracy | ±1°C |
| Heating Rate | 1.0–4.0°C/min |
Overview
The OK-STH-12.0005m² Walk-in Environmental Test Chamber is a fully engineered, custom-configurable climatic simulation system designed for rigorous physical property testing under controlled thermal conditions. Unlike standardized benchtop chambers, this walk-in platform operates on the principle of forced-air convection with dual-stage refrigeration and precision PID-controlled electric heating—enabling stable, repeatable, and traceable environmental profiles across wide temperature ranges. Its structural architecture complies with ISO 17025-accredited laboratory infrastructure requirements and supports validation protocols aligned with IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), and GB/T 2423.1–2423.2 test standards. The chamber is not a catalog item but a project-specific solution: each unit is built to a unique technical specification defined by internal volume, thermal performance envelope, load thermal mass, and control logic requirements—ensuring full alignment with end-user application constraints in automotive component validation, aerospace materials qualification, and industrial electronics reliability testing.
Key Features
- Modular stainless-steel insulated enclosure with 150 mm polyurethane foam core (thermal conductivity ≤ 0.022 W/m·K) and double-sealed gasketed access door for minimized thermal leakage
- Dual-refrigeration circuit design (cascade or single-stage depending on selected low-temp option) with environmentally compliant R404A/R23 refrigerant blends and oil management system
- High-efficiency axial fan array with variable-frequency drive (VFD) ensuring uniform airflow distribution and minimizing vertical/horizontal temperature gradients
- Industrial-grade PLC-based controller with 10.4-inch TFT touchscreen HMI, supporting up to 99 programmable segments and 999 cycles per profile
- Integrated real-time monitoring of chamber air temperature, wall surface temperature, and supply/return air differential—each logged at user-defined intervals (1 s to 60 min)
- Redundant safety systems including over-temperature cut-off, refrigerant high-pressure switch, door interlock, and emergency power-off (EPO) interface
Sample Compatibility & Compliance
This chamber accommodates large-format test articles—including assembled vehicle ECUs, battery modules, avionics enclosures, and structural composites—within its 12.0 m³ usable workspace (3000 × 2000 × 2000 mm internal dimensions). Thermal load capacity is configurable during engineering review: maximum sustained internal heat dissipation support ranges from 3 kW (for −20°C operation) to 1.2 kW (for −70°C operation), verified per ASTM E145 Annex A3 methodology. All configurations meet electromagnetic compatibility (EMC) requirements per EN 61326-1 and are designed for integration into GLP/GMP environments—with optional audit trail functionality compliant with FDA 21 CFR Part 11 when paired with OK-DataVault™ software suite.
Software & Data Management
The embedded OK-EnviroControl™ firmware enables local profile editing, real-time trending, and alarm event logging with time-stamped digital signatures. Optional PC-based OK-DataVault™ software provides centralized multi-chamber supervision, automated report generation (PDF/CSV), and secure database archiving with role-based access control. Data integrity features include electronic signature capture, change history tracking, and tamper-evident audit logs—all structured to satisfy ISO/IEC 17025 clause 7.5.2 and CNAS-CL01:2018 documentation requirements. Raw sensor data is recorded at ≥1 Hz resolution and exportable without proprietary codec dependency.
Applications
- Temperature cycling and storage tests per MIL-STD-810H Method 502.7 and RTCA DO-160G Section 4.1
- Thermal shock pre-conditioning prior to vibration or HALT/HASS testing
- Long-term aging studies of polymer seals, adhesives, and conformal coatings under sustained sub-zero exposure
- Pre-delivery environmental stress screening (ESS) of defense-grade power supplies and radar subsystems
- Validation of thermal management strategies for EV traction inverters operating at −40°C ambient start-up
- Calibration lab support for reference thermocouple and RTD characterization across extended temperature spans
FAQ
Is the OK-STH-12.0005m² model a stock item or custom-built?
It is a project-specific configuration. The “12.0005m²” designation reflects nominal floor area; final mechanical, electrical, and control specifications are finalized only after technical consultation and formal requirement sign-off.
Can this chamber be validated per IQ/OQ/PQ protocols?
Yes. Full qualification documentation packages—including sensor calibration certificates (NIST-traceable), installation drawings, FAT/SAT checklists, and uncertainty budgets—are available as optional deliverables.
What power supply options are supported?
Standard configuration requires 380 VAC ±10%, 3-phase, 50 Hz. Custom variants accommodate 400 V / 60 Hz, 480 V / 60 Hz, or dual-voltage auto-sensing inputs upon request.
Does OK Instruments provide on-site commissioning and operator training?
Yes. Commissioning includes chamber performance verification against agreed acceptance criteria (e.g., temperature uniformity per IEC 60068-3-5), followed by hands-on training covering profile programming, alarm response, data export, and routine maintenance procedures.
