JianHu JH Series High-Low Temperature Environmental Test Chamber with Circulating Temperature Control System

Overview

The JianHu JH Series High-Low Temperature Environmental Test Chamber with Circulating Temperature Control System is an engineered solution for precise, repeatable thermal stress testing of materials and electronic components under controlled ambient conditions. Based on forced-air convection and dual-stage compressor refrigeration architecture, the system delivers stable thermal environments across a wide operational range—from cryogenic −70 °C to elevated +150 °C—enabling accelerated aging, thermal cycling, and qualification testing in accordance with international reliability standards. Its explosion-proof configuration complies with IEC 60079-0 and GB 3836.1, making it suitable for testing volatile or flammable samples in automotive electronics, battery modules, aerospace subsystems, and chemical-sensitive R&D applications. Designed for integration into GLP/GMP-compliant laboratories and ISO/IEC 17025-accredited test facilities, the JH Series supports traceable calibration, audit-ready operation logs, and long-term stability verification per ASTM E2293 and ISO 16750-4.

Key Features

• Explosion-proof certified chamber enclosure with intrinsically safe temperature control circuitry and pressure-relief venting
• Dual-stage cascade refrigeration system enabling rapid cooldown to −70 °C without liquid nitrogen dependency
• High-precision PID-controlled circulating air system ensuring thermal homogeneity within ±2.0 °C deviation and ≤±0.5 °C short-term fluctuation
• Modular construction supporting customizable internal dimensions, port configurations (e.g., cable feedthroughs, optical access), and auxiliary interfaces (RS485, Ethernet, analog I/O)
• Stainless-steel interior chamber with electrostatic-dissipative finish and removable insulated shelves for flexible sample loading
• Real-time monitoring of chamber pressure, dew point, and refrigerant saturation temperature via embedded sensors
• Compliance-ready firmware supporting 21 CFR Part 11–compliant user authentication, electronic signatures, and immutable audit trails

Sample Compatibility & Compliance

The JH Series accommodates diverse sample geometries—including printed circuit assemblies (PCBAs), EV battery cells, polymer composites, optical sensors, and sealed electronic enclosures—within its thermally isolated workspace. Its explosion-proof rating permits safe evaluation of lithium-ion battery modules during thermal runaway simulation, conforming to UN 38.3 T.4 and UL 1642 requirements. The chamber meets environmental test protocol prerequisites for automotive electronics per ISO 16750-4 (road vehicles), AEC-Q200 (passive components), and JEDEC JESD22-A104 (temperature cycling). For pharmaceutical and medical device validation, it supports ICH Q1A(R2) stability testing profiles when configured with humidity control add-ons (optional). All units are supplied with factory calibration certificates traceable to NIM (National Institute of Metrology, China) and include documentation packages aligned with ISO/IEC 17025 clause 6.4.10.

Software & Data Management

The integrated JianHuTest Control Suite provides deterministic thermal profile programming, multi-step ramp-soak-hold sequencing, and real-time graphical visualization of chamber parameters. Data logging occurs at configurable intervals (100 ms to 10 min resolution) with automatic export to CSV, PDF, or XML formats compliant with LIMS and ELN systems. Remote supervision is enabled via secure HTTPS web interface or Modbus TCP protocol, supporting integration into centralized test management platforms such as NI TestStand or Keysight PathWave. Audit trail records capture operator ID, timestamp, parameter changes, and alarm events—retained for ≥36 months with write-once-read-many (WORM) storage enforcement. Software validation documentation (IQ/OQ/PQ templates) and GAMP 5-aligned risk assessments are available upon request.

Applications

• Automotive electronics qualification: ECUs, ADAS sensors, infotainment systems, and powertrain controllers under extreme thermal cycling
• Lithium-based battery safety testing: Thermal propagation resistance, charge/discharge performance at sub-zero temperatures, and post-cycling capacity retention analysis
• Materials science research: Polymer glass transition (Tg) mapping, elastomer compression set evaluation, and adhesive bond strength degradation studies
• Semiconductor packaging validation: Die attach integrity assessment, wire bond fatigue under thermal shock, and mold compound delamination screening
• Aerospace component certification: Avionics box survivability per MIL-STD-810H Method 501.7 and 502.7
• Academic and national lab use: Reproducible climate simulation for physics, chemistry, and biophysics experiments requiring long-duration thermal stability

FAQ

What standards does the JH Series comply with for automotive testing?
It supports test execution per ISO 16750-4, AEC-Q100/Q200, and SAE J2380, with optional upgrade paths for full MIL-STD-810H compliance.
Can the chamber be integrated into an existing automated test system?
Yes—standard RS485 Modbus RTU and optional Ethernet/IP or Profinet interfaces enable seamless PLC and SCADA integration.
Is remote calibration verification supported?
Field calibration checks can be performed using external reference probes connected via dedicated sensor ports; full recalibration requires NIM-traceable service engineers.
What maintenance intervals are recommended for the refrigeration system?
Compressor oil and filter replacement every 12 months or 2,000 operating hours; annual leak detection and refrigerant purity analysis per ASHRAE Standard 15.
Does the explosion-proof version support inert gas purging?
Yes—integrated nitrogen purge manifold with mass flow controller and O₂ sensor is available as an option for Class I, Division 1 hazardous locations.