Walk-in Environmental Chamber – Large-Capacity Temperature & Humidity Test Chamber

Overview

The Walk-in Environmental Chamber – Large-Capacity Temperature & Humidity Test Chamber is an industrial-grade climatic simulation system engineered for reliability, thermal stability, and long-term operational integrity in validation laboratories, automotive component testing facilities, and electronics manufacturing QA environments. Designed around a dual-stage cascade refrigeration architecture, the chamber achieves stable temperature control from –70 °C to +150 °C (with optional humidity range 20–98% RH), meeting the stringent thermal cycling and steady-state exposure requirements of IEC 60068-2, ISO 16750-4, and GB/T 2423 standards. Its walk-in configuration enables full-size product evaluation—including EV battery modules, aerospace avionics enclosures, and medical imaging subsystems—without spatial compromise. The structural design prioritizes thermal inertia reduction and uniformity: high-density polyurethane (PU) insulation (≥100 mm), seamless SUS304 interior cladding, and a rigid steel frame (6# channel + angle iron base) ensure minimal heat leakage and mechanical durability across decades of service.

Key Features

• Modular field-assembled construction allows flexible integration into existing lab infrastructure, including ceiling-height clearance adaptation and utility conduit routing through standardized panel joints.
• Dual-stage cascade refrigeration system using R404A (low-stage) and R23 (high-stage) enables rapid cooldown to –70 °C while maintaining sub-0.5 °C temperature uniformity (±0.3 °C at setpoint, per IEC 60068-3-5).
• TEMI 880 microprocessor-based controller with real-time graphical display, programmable ramp-soak profiles, and audit-trail-capable event logging—fully compliant with GLP and FDA 21 CFR Part 11 when paired with optional electronic signature modules.
• Top-mounted forced-air circulation system featuring SIROCCO-type impellers and extended-shaft AC motors ensures laminar airflow distribution and ≤±1.0 °C vertical/horizontal temperature deviation across the entire test volume.
• Triple-layer vacuum-insulated observation window (450 × 340 × 40 mm) provides optical clarity without thermal bridging—critical for in-situ visual inspection during prolonged thermal stress tests.
• Comprehensive safety architecture includes redundant overtemperature cutoffs (chamber and compressor), oil pressure monitoring, phase failure detection, ground fault interruption, and automatic water-level shutdown for humidification systems.

Sample Compatibility & Compliance

This chamber accommodates large-format test specimens up to 2000 mm (W) × 2000 mm (D) × 2200 mm (H), supporting static and dynamic environmental stress screening of automotive ECUs, server racks, military-grade power supplies, and Class III medical devices. All structural and control subsystems conform to CE marking directives (2014/30/EU EMC, 2014/35/EU LVD), RoHS 2011/65/EU, and UL 61010-1 safety requirements. Thermal performance verification follows ISO 17025-accredited procedures, with calibration traceability to NIST or national metrology institutes. Humidity control (if equipped) meets ISO 8503-1 surface roughness conditioning protocols and ASTM D2247 salt fog pre-conditioning sequences.

Software & Data Management

The TEMI 880 controller supports native data export via USB or RS485 to third-party SCADA platforms (e.g., Ignition, WinCC) and includes built-in CSV logging with timestamped temperature/humidity/pressure values at user-defined intervals (1 s to 60 min). Optional Ethernet connectivity enables remote monitoring, alarm SMS/email notifications, and integration with enterprise LIMS or MES systems. Audit trail functionality records all parameter changes, operator logins, and safety interlock activations—meeting FDA 21 CFR Part 11 Annex 11 requirements for electronic records and signatures when deployed with validated user access controls and password complexity policies.

Applications

• Automotive: Thermal shock validation of ADAS sensors, battery thermal management system (BTMS) endurance testing per ISO 16750-4.
• Aerospace: Environmental qualification of flight-critical avionics per DO-160G Section 4 (Temperature) and Section 5 (Humidity).
• Electronics Manufacturing: Burn-in testing of PCBAs under accelerated temperature-humidity bias (THB) conditions aligned with JEDEC JESD22-A110.
• Energy Storage: Cycle-life assessment of lithium-ion battery packs under variable ambient load profiles (e.g., simulated desert vs. arctic operation).
• Pharmaceutical: Stability chamber qualification per ICH Q1A(R2) and WHO TRS 992 Annex 9 for long-term and accelerated storage condition mapping.

FAQ

What is the standard lead time for custom-sized chambers?
Standard delivery is 12–14 weeks after order confirmation and final dimensional approval; expedited builds (8–10 weeks) are available with engineering review and premium logistics coordination.

Can this chamber be integrated with existing facility BMS systems?
Yes—RS485 Modbus RTU and optional BACnet/IP gateways enable seamless two-way communication with building management systems for centralized HVAC and alarm aggregation.

Is on-site commissioning and IQ/OQ documentation included?
Factory acceptance testing (FAT) is standard; on-site installation, SAT, and GMP-compliant IQ/OQ protocol execution are available as value-added services with certified metrologists.

What maintenance intervals are recommended for the cascade refrigeration system?
Compressor oil analysis every 2,000 operating hours; Danfoss expansion valve calibration annually; full refrigerant circuit leak check and moisture purge biannually.

Does the chamber support humidity control, and what is its accuracy specification?
Humidity capability is optional; when configured, it delivers ±2.0% RH accuracy (20–98% RH, 25–85 °C) per ISO 17025-calibrated hygrometer validation.