Labonce Labonce-1000GDJ High-Low Temperature Alternating Test Chamber

Overview

The Labonce Labonce-1000GDJ High-Low Temperature Alternating Test Chamber is an engineered environmental simulation system designed for rigorous thermal stress evaluation of industrial components, electronic assemblies, automotive parts, aerospace materials, and packaging systems under controlled non-humidified thermal cycling conditions. Unlike combined temperature-humidity chambers, the GDJ series is purpose-built for high-fidelity, stable, and repeatable dry thermal profiling—eliminating condensation-related artifacts while maintaining precise thermal gradients across large-volume test spaces. Its operation follows the fundamental principle of forced-air convection thermoregulation, where a dual-path air distribution system ensures uniform heat transfer across the entire 1000 L working volume (1000 mm × 1000 mm × 1000 mm internal cavity), minimizing spatial thermal stratification in accordance with GB/T 10592–2008 verification protocols. The chamber supports programmable alternating cycles between –60 °C and +150 °C (user-selectable configuration), enabling accelerated life testing, thermal shock screening, cold-start validation, and qualification per IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), and MIL-STD-810H Method 502.7.

Key Features

• Robust thermal architecture featuring dual-stage cascade refrigeration with imported hermetic industrial compressors—optimized for continuous operation at extreme low-temperature setpoints without performance degradation.
• High-precision programmable touchscreen controller supporting up to 99 segments, 999 cycles, ramp/soak profiles, and real-time deviation monitoring with configurable alarm thresholds.
• Thermally balanced airflow design with independent supply/exhaust ducts and adjustable vane diffusers—validated to achieve ≤±0.5 °C temperature fluctuation and ≤±2.0 °C spatial deviation across the full working zone.
• SUS304 stainless steel interior (fully welded, radius-cornered) paired with electrostatically powder-coated carbon steel exterior—resistant to oxidation, corrosion, and mechanical abrasion during long-term lab use.
• Comprehensive safety redundancy: independent over-temperature cut-off circuit (mechanical backup), compressor high-pressure/overheat interlocks, fan thermal cutoff, and real-time sensor fault detection with audible/visual alerts.
• Integrated data logging with non-volatile memory (≥30 days at 1-min intervals); export via standard USB-A interface in CSV format—compatible with LIMS, MES, and QA audit workflows.

Sample Compatibility & Compliance

The Labonce-1000GDJ accommodates large-format test specimens—including full-size PCB assemblies, EV battery modules, HVAC housings, and medical device enclosures—without compromising thermal stability. Its 1000 L capacity and symmetrical internal geometry support ISO/IEC 17025-compliant calibration traceability using NIST-traceable PT100 probes placed at designated ASTM E2297-defined locations (center, corners, mid-walls). The system complies with national standard GB/T 10592–2008 for performance verification and is routinely deployed in laboratories operating under GLP and GMP frameworks. While not humidity-capable (GDJ = “Dry Jacket”), its thermal repeatability meets requirements for pre-conditioning steps prior to humidity exposure in multi-stage reliability protocols (e.g., JEDEC JESD22-A104, IPC-9701).

Software & Data Management

Data integrity is maintained through timestamped, tamper-evident logging with automatic event tagging (e.g., power interruption, door open, alarm activation). The embedded controller firmware supports optional RS485 Modbus RTU or Ethernet TCP/IP communication for integration into centralized facility monitoring systems (BMS/SCADA). Exported CSV files include column headers compliant with 21 CFR Part 11 Annex 11 expectations—enabling straightforward import into statistical process control (SPC) platforms such as Minitab or JMP. Audit trails record all parameter changes, user logins, and calibration events—supporting FDA, ISO 9001, and IATF 16949 documentation requirements.

Applications

• Thermal cycling qualification of avionics components per DO-160 Section 4.5.
• Low-temperature functional validation of lithium-ion battery management systems (BMS) down to –40 °C.
• High-temperature aging of polymer-based insulators and encapsulants (e.g., epoxy, silicone) per UL 746B.
• Preconditioning of optical sensors and laser diodes prior to photometric stability testing.
• Stress screening of solder joints in high-reliability electronics per IPC-J-STD-004 and IPC-9701.
• Material coefficient-of-thermal-expansion (CTE) correlation studies using calibrated dimensional metrology fixtures mounted inside the chamber.

FAQ

What temperature ranges are available for the Labonce-1000GDJ model?

The Labonce-1000GDJ is offered in three standard configurations: –20 °C to +150 °C, –40 °C to +150 °C, and –60 °C to +150 °C. Selection is made at time of order and impacts compressor staging and insulation thickness.
Does this chamber support humidity control?

No. The GDJ series is strictly a dry thermal cycling chamber. For combined temperature/humidity testing, refer to the Labonce-1000JS series.
Can the chamber be integrated into a laboratory automation network?

Yes—via optional RS485 Modbus RTU or Ethernet TCP/IP interfaces. Full register mapping and command syntax are provided in the technical manual for SCADA and MES integration.
What is the validation protocol for temperature uniformity?

Uniformity is verified per GB/T 10592–2008 using nine calibrated PT100 sensors placed at standardized locations. A full validation report—including uncertainty budget and probe calibration certificates—can be supplied upon request.
Is external calibration support available?

Labonce provides on-site IQ/OQ/PQ support through authorized regional partners, including documented procedures aligned with ISO/IEC 17025 and ANSI/NCSL Z540-1.