Labonce Labonce-1000JS High-Low Temperature Alternating Humidity Environmental Test Chamber

Overview

The Labonce Labonce-1000JS High-Low Temperature Alternating Humidity Environmental Test Chamber is an engineered platform for rigorous environmental stress testing of electrical and electronic components, materials, and finished products under controlled thermal and hygrothermal cycling conditions. Designed in strict compliance with GB/T 10592–2008 (“Technical Requirements for High-Low Temperature Test Chambers”), the system enables precise simulation of real-world storage, transportation, and operational environments—including extreme cold, elevated temperature, and high-humidity exposure. Its core function is to subject test specimens to programmable, repeatable thermal-hygrometric profiles to evaluate functional integrity, dimensional stability, material degradation, solder joint reliability, and insulation performance. The chamber operates on a forced-air convection principle with optimized airflow distribution, ensuring thermodynamic equilibrium across the entire 1000 L working volume—critical for achieving statistical validity in accelerated life testing and qualification protocols.

Key Features

• Robust dual-wall construction: Exterior carbon steel cabinet with epoxy-polyester powder coating; interior chamber fabricated from corrosion-resistant AISI 304 stainless steel for long-term resistance to humidity-induced oxidation.
• High-efficiency refrigeration system: Equipped with imported hermetic industrial compressors, copper-aluminum finned evaporators, and multi-stage cascade cooling architecture (standard for –60 °C capability), delivering stable low-temperature performance with acoustic noise <65 dB(A) at 1 m distance.
• Advanced air circulation design: Patented asymmetric wind tunnel layout with adjustable axial fans ensures uniform temperature distribution (±2.0 °C per IEC 60068-3-5) and minimal vertical/horizontal gradients—even during dynamic ramping phases.
• Intelligent control interface: 10.4-inch full-color TFT touchscreen controller supporting up to 99 programmable segments, 1000-step cycles, and real-time graphical trend display. Includes built-in PID auto-tuning, manual parameter override, and password-protected configuration levels.
• Comprehensive safety architecture: Dual independent overtemperature protection (mechanical backup cut-off + digital alarm), compressor discharge temperature monitoring, refrigerant pressure transducers, fan motor thermal sensors, and configurable deviation alarms for both temperature and humidity channels.

Sample Compatibility & Compliance

The Labonce-1000JS accommodates large-format test articles—including automotive ECUs, server racks, PCB assemblies, polymer enclosures, and aerospace structural composites—within its 1000 × 1000 × 1000 mm stainless-steel work area. Two adjustable 304 stainless steel shelves (standard), rated for 30 kg load per shelf, support flexible sample mounting. The chamber meets mechanical and operational requirements referenced in multiple international standards: GB/T 2423.1 (cold testing), GB/T 2423.2 (dry heat), GB/T 2423.3 (damp heat, steady state), IEC 60068-2-1, IEC 60068-2-2, and IEC 60068-2-30. While not certified to UL or CE as a complete system, its subsystems (compressor, controller, power supply) comply with RoHS directives and carry relevant component-level safety certifications (e.g., CCC, TÜV-marked relays). For GLP/GMP-regulated environments, optional audit trail logging and user access control modules are available upon request.

Software & Data Management

All operational parameters—including chamber setpoints, actual sensor readings (Pt100 RTDs ×3, capacitive RH sensors ×2), compressor status, fan speed, and alarm events—are continuously logged at user-selectable intervals (1 s to 60 min) into non-volatile internal memory (≥30 days at 1-min resolution). Data export is performed via standard USB 2.0 interface using FAT32-formatted flash drives, generating timestamped CSV files compatible with Excel, MATLAB, and LIMS platforms. Optional RS485 Modbus RTU or Ethernet TCP/IP communication enables integration into centralized facility monitoring systems (e.g., Siemens Desigo, Honeywell Experion). Firmware supports firmware update via USB and includes configurable data retention policies and cyclic overwrite logic to prevent storage overflow.

Applications

• Accelerated aging studies for conformal coatings, potting compounds, and encapsulants under combined thermal-hygric stress.
• Qualification testing of military-grade electronics per MIL-STD-810H Method 502.7 (low temperature), Method 507.6 (humidity), and Method 506.6 (temperature shock).
• Reliability validation of lithium-ion battery modules during thermal runaway propagation assessment.
• Material compatibility screening for gaskets, seals, and elastomers exposed to cyclic condensation and evaporation.
• Pre-compliance screening for consumer electronics prior to formal IEC 60950-1 / IEC 62368-1 environmental testing.

FAQ

What is the minimum achievable temperature for the Labonce-1000JS model?

The standard configuration supports –60 °C; optional ultra-low variants extend to –70 °C with enhanced cascade refrigeration.
Can the chamber maintain humidity at sub-zero temperatures?

Humidity control is disabled below +5 °C to prevent frost accumulation on sensors and humidifier elements; dew point tracking remains active for dry-cold profiling.
Is the controller compliant with FDA 21 CFR Part 11 requirements?

Out-of-the-box, the base controller does not include electronic signature or audit trail features; however, validated software add-ons meeting Part 11 Annex 11 criteria are available under separate qualification agreement.
How often does the system require preventive maintenance?

Compressor oil and refrigerant filter replacement is recommended every 24 months under continuous operation; quarterly inspection of door gaskets, sensor calibration verification, and airflow path cleaning are advised.
Does the Labonce-1000JS support remote monitoring via network?

Yes—via optional Ethernet module with HTTP/HTTPS web interface, SNMP v3 trap reporting, and RESTful API endpoints for third-party SCADA integration.