HJ ZJFX-GDW Series High-Low Temperature Environmental Test Chamber

Overview

The HJ ZJFX-GDW Series High-Low Temperature Environmental Test Chamber is an engineered precision system designed for controlled thermal stress evaluation of materials, components, and finished products under reproducible laboratory conditions. Operating on the principle of forced-air convection with dual-stage refrigeration and PID-controlled resistive heating, this chamber delivers stable, uniform thermal environments across a wide operational range—from −70 °C to +150 °C—enabling rigorous simulation of real-world climatic extremes. Its architecture conforms to fundamental thermodynamic design principles for environmental testing, including optimized airflow distribution, minimized thermal bridging, and calibrated sensor placement per ISO 16750-4 and IEC 60068-3-5. The chamber is not intended for humidity control in all variants; models equipped with integrated humidification systems meet the requirements of GB/T 2423.34–2005 (IEC 60068-2-30) for damp heat cycling.

Key Features

• Triple-range temperature capability: Selectable configurations support −20 °C, −40 °C, or −70 °C minimum operating points—all with consistent +150 °C upper limit.
• High-fidelity thermal control: TEMI880 color touchscreen controller provides real-time graphical monitoring of setpoint and actual chamber temperature curves, supporting up to 120 independent test programs with segment-based ramp/soak logic.
• Robust thermal management: Dual-refrigerant (R404A/R23A) cascade refrigeration system featuring original Tecumseh compressors ensures rapid cooldown stability and long-term reliability under continuous duty cycles.
• Structural integrity: Inner chamber constructed from 1.0 mm SUS#304 mirror-finish stainless steel resists corrosion and facilitates cleaning; outer enclosure options include powder-coated cold-rolled steel or brushed stainless steel (1.2 mm).
• Comprehensive safety architecture: Integrated protections include compressor high-pressure cutoff, overtemperature limiter (independent from main controller), fan motor overload detection, dry-heater fail-safe, and automatic water shortage alarm for humidified operation.
• Ergonomic usability: Standard triple-layer vacuum-insulated viewing window, 50 mm left-side test port with silicone plug, four locking swivel casters, and detachable humidification tank with five certified wet-bulb gauzes.

Sample Compatibility & Compliance

The ZJFX-GDW series accommodates diverse sample geometries through seven standard inner chamber volumes (80 L to 1000 L), with customizable non-standard dimensions available upon request. Internal dimensions are optimized to maintain ASTM E145 Class II uniformity criteria (±1.5 °C) and IEC 60068-3-5 stability tolerances (±0.5 °C). The chamber satisfies national and international regulatory benchmarks including GB/T 10589–2008 (Low-Temperature Test Chamber Specifications), GB/T 10592–2008 (Climatic Test Chamber General Requirements), and GB/T 2423.1–2001 (IEC 60068-2-1, Test Aa/Ab), GB/T 2423.2–2001 (IEC 60068-2-2, Test B), and GB/T 2423.34–2005 (Damp Heat, Cycle). It supports GLP-compliant validation protocols when paired with external data loggers meeting FDA 21 CFR Part 11 audit trail requirements.

Software & Data Management

The TEMI880 controller supports full-cycle data logging (timestamped temperature values at user-defined intervals), export via USB to CSV format, and password-protected parameter modification. Firmware includes built-in calibration offset adjustment, firmware update capability via USB, and configurable alarm thresholds with relay output signaling. While the base unit does not include network connectivity, optional RS485/Modbus RTU interface enables integration into centralized facility monitoring systems compliant with ISO/IEC 17025 laboratory information management (LIMS) workflows. All test profiles are stored with versioned timestamps and operator ID fields—supporting traceability in GMP-aligned quality systems.

Applications

This test chamber serves critical qualification functions across multiple regulated sectors: accelerated aging and thermal shock evaluation of lithium-ion battery cells per UN 38.3 Section 38.3.4; thermal cycling validation of automotive ECUs per ISO 16750-4; shelf-life determination of pharmaceutical packaging under ICH Q1A(R2); dimensional stability testing of aerospace composites per MIL-STD-810H Method 501.7; and reliability screening of consumer electronics per JEDEC JESD22-A104F. It is routinely deployed in QC laboratories of Tier-1 suppliers, national metrology institutes, and university research centers conducting material science, polymer degradation, and electronic component failure analysis.

FAQ

What temperature ranges are available for the ZJFX-GDW series?
Standard configurations offer −20 °C, −40 °C, or −70 °C low-temperature limits, all with a consistent +150 °C upper bound. Custom extended ranges may be engineered upon technical review.
Is humidity control included as standard?
Humidification capability is model-dependent. Units designated with “H” suffix include integrated steam-type humidifiers meeting GB/T 2423.34–2005; non-humidified variants are available for pure thermal testing.
Can the chamber be validated for ISO/IEC 17025 compliance?
Yes—the chamber’s mechanical design, sensor layout, and thermal performance characteristics support IQ/OQ/PQ documentation packages. External calibrated reference sensors (e.g., Fluke 1524 with accredited calibration certificate) are recommended for formal validation.
What power supply requirements apply?
All models require three-phase 380 V AC ±10%, 50 Hz, with dedicated grounding and circuit protection per IEC 61000-4-5 surge immunity standards.
Are spare parts and service support available internationally?
HJ provides OEM-specified spare compressors, controllers, and sensors through authorized regional distributors. Remote diagnostics and on-site technician dispatch are supported under extended service agreements.