LED Large-Scale Temperature & Humidity Environmental Test Chamber

Overview

The OK-STH Series LED Large-Scale Temperature & Humidity Environmental Test Chamber is an engineered climatic simulation platform designed for rigorous reliability validation of industrial components and finished products under controlled thermal and hygrothermal stress conditions. Based on the Balanced Temperature and Humidity Control (BTHC) principle, the chamber maintains precise setpoints through real-time PID feedback regulation of refrigeration output, electric heating power, and steam humidification rate. Its operational envelope spans −70 °C to +150 °C and 20–98 %RH, enabling replication of extreme ambient profiles—including rapid thermal transitions, sustained high-humidity aging, and low-temperature dry storage—critical for accelerated life testing per IEC 60068-2, MIL-STD-810, and ISO 16750 standards. The chamber’s structural integrity, thermal efficiency, and long-term repeatability are validated for continuous operation in QC laboratories, R&D centers, and production line qualification environments.

Key Features

• Zero-ozone-depletion refrigerant configuration (R23/R404A), compliant with Montreal Protocol phase-out schedules and EU F-Gas Regulation (EU No 517/2014)
• Mirror-finish SUS304 stainless steel interior with radius-corner construction—ensuring corrosion resistance, non-contaminating surface properties, and ease of decontamination per ISO 14644 cleanroom maintenance protocols
• Integrated water recovery and multi-stage filtration system reduces consumable dependency and supports unattended 72-hour test cycles without manual refilling
• Top-exhaust heat dissipation architecture minimizes floor footprint and improves thermal management in constrained lab spaces
• P.P. (polypropylene) non-metallic door gasket design achieves >25 % reduction in conductive heat loss at seal interfaces, verified per ASTM C177 steady-state thermal transmission testing
• TEMI880 controller with GLP-compliant audit trail logging, password-protected parameter modification, and RS-232 interface for traceable data export to LIMS or MES platforms

Sample Compatibility & Compliance

The OK-STH chamber accommodates heterogeneous sample geometries—from automotive ECUs and PCB assemblies to textile swatches and polymer packaging—via its modular shelf system (two adjustable tiers standard; optional third tier available). All models meet EN 61000-6-3 (EMC emissions) and EN 61000-6-2 (immunity) requirements. Humidity control accuracy (±2.5 %RH fluctuation) satisfies USP and ISO 12780-2 criteria for pharmaceutical stability chambers. Thermal uniformity (±2 °C) aligns with IEC 60068-3-5 for environmental test equipment qualification. Optional calibration certificates (NIST-traceable Pt100 sensors) and IQ/OQ documentation packages support FDA 21 CFR Part 11 compliance for regulated industries.

Software & Data Management

The TEMI880 controller firmware supports full-cycle programmability—including ramp-soak profiles, cycling sequences, and conditional branching based on real-time sensor input. Each of the 120 stored programs can define up to 999 time-segment steps with independent temperature/humidity targets, dwell durations, and rate limits. All operational events—including alarm triggers, setpoint changes, and power interruptions—are timestamped and logged with user ID attribution. Data export via RS-232 enables direct ingestion into MATLAB, Python Pandas, or commercial SPC software for statistical process control analysis. Optional Ethernet module (OK-ETH-01) adds MODBUS TCP support for integration into SCADA systems.

Applications

• Electronics: Thermal cycling of solder joints (JEDEC JESD22-A104), moisture sensitivity level (MSL) preconditioning (J-STD-020), and condensation resistance testing
• Automotive: Climate endurance of infotainment displays, battery modules, and ADAS sensors per ISO 16750-4
• Pharmaceuticals: Accelerated stability studies under ICH Q1A(R3) conditions (e.g., 40 °C/75 %RH for 6 months)
• Materials Science: Hygrothermal aging of composites, adhesives, and elastomers to assess dimensional stability and delamination onset
• Food Packaging: Barrier property degradation assessment under tropical (37 °C/85 %RH) and arid (23 °C/40 %RH) storage simulations

FAQ

What is the maximum allowable sample mass load without compromising chamber performance?
Chamber thermal capacity is rated for ≤15 kg of inert mass per 100 L internal volume. Exceeding this may extend stabilization time beyond specification; consult the thermal load derating chart in Section 4.2 of the OK-STH Technical Manual.
Can the chamber operate continuously at −70 °C with 20 %RH?
Yes—this extreme low-temperature/low-humidity condition is supported across all OK-STH models, provided ambient room temperature remains ≤25 °C and relative humidity ≤60 %RH to ensure condenser efficiency.
Is third-party calibration certification included with delivery?
Factory calibration using NIST-traceable reference sensors is performed pre-shipment. Full ISO/IEC 17025-accredited calibration certificates are available as a value-added service upon request.
How is humidity controlled below 30 %RH?
Sub-30 %RH operation employs dynamic dehumidification via chilled mirror dew point control combined with precision hot-gas bypass modulation of the refrigeration circuit—not desiccant-based methods—to ensure long-term RH stability and avoid drift.
Does the system support remote monitoring via Ethernet or cloud interface?
Standard RS-232 supports local PC connectivity. Optional OK-ETH-01 Ethernet adapter enables MODBUS TCP communication and integration with building management systems (BMS); cloud telemetry requires customer-provided secure gateway infrastructure.