KS-TH Series Programmable Rapid Temperature and Humidity Cycling Chamber

Overview

The KS-TH Series Programmable Rapid Temperature and Humidity Cycling Chamber is an engineered environmental test system designed for accelerated reliability validation of electronic components, automotive modules, aerospace assemblies, and medical devices under dynamically varying thermal and hygrothermal stress conditions. Utilizing a dual-stage cascade refrigeration architecture, the chamber achieves precise, repeatable transitions between extreme temperature extremes—from −70 °C to +150 °C—while maintaining controlled relative humidity levels from 20 %RH up to 98 %RH. Its rapid thermal ramp capability (5–25 °C/min, user-selectable) enables simulation of real-world operational transients such as power-on surge, altitude-induced thermal shock, or diurnal cycling in outdoor electronics. Unlike conventional steady-state chambers, the KS-TH series supports programmable multi-segment profiles—including dwell, linear ramp, and step-change sequences—with full traceability of setpoints, actual chamber readings, and alarm events. All control logic is implemented via industrial-grade PLC firmware with PID auto-tuning algorithms, ensuring minimal overshoot and high long-term stability across extended test durations.

Key Features

• Industrial-grade 7-inch color TFT LCD touch controller with intuitive bilingual (English/Chinese) interface, supporting up to 96 independent test programs and cycle counts from 1 to 999
• Dual-stage cascade refrigeration system using environmentally compliant HFC-507 and R23 refrigerants (zero ozone depletion potential), paired with hermetically sealed, low-noise compressors from leading European and North American manufacturers
• Optimized airflow design with rear-mounted centrifugal fans and perforated stainless-steel baffles ensures uniform temperature distribution (±2 °C) and humidity homogeneity (±3.0 %RH at ≥75 %RH) throughout the working volume
• Standard 50 mm diameter access port on left side wall, fitted with silicone gasket and brass compression fitting, enabling external power supply, signal cabling, or sensor feedthrough without compromising chamber integrity
• Comprehensive safety architecture including over-temperature cutoff, compressor high-pressure shutdown, phase failure detection, ground fault interruption, short-circuit protection, and audible/visual alarm activation
• Full P.L.C.-based system monitoring with hardware-level interlocks; all critical actuator states (compressor, heater, humidifier, solenoid valves) are continuously logged and locked during fault conditions

Sample Compatibility & Compliance

The KS-TH chamber accommodates samples ranging from PCB subassemblies and handheld consumer devices to full-sized automotive ECUs and battery packs (up to 100 L internal volume). Its internal chamber walls, shelves, and insulation layers are constructed entirely from AISI 304 stainless steel—resistant to corrosion, non-outgassing, and compatible with cleanroom and ISO 14644-compliant environments. The system meets structural and performance requirements outlined in multiple international and national standards, including GB/T 2423.1 (cold testing), GB/T 2423.2 (dry heat), GB/T 2423.22 (temperature change), GJB 150.3/150.4 (military environmental test methods), and GB/T 10592 (general specification for climate chambers). While not pre-certified for FDA 21 CFR Part 11, the controller’s event logging, password-protected parameter editing, and time-stamped operation records support audit-ready documentation for GLP/GMP-regulated validation protocols.

Software & Data Management

The embedded controller provides real-time graphical display of temperature/humidity curves, deviation alerts, and program execution status. All test data—including setpoint history, actual chamber readings, alarm timestamps, and system status flags—are stored internally on non-volatile flash memory (minimum 30-day retention). Optional RS485/Modbus RTU or Ethernet TCP/IP interfaces enable integration with centralized lab management systems (LIMS) or SCADA platforms. Data export is supported via USB flash drive in CSV format, preserving column headers, UTC timestamps, and engineering units. Firmware updates are performed offline via secure signed binary files, ensuring version control and traceability per ISO/IEC 17025 Clause 5.9. No cloud connectivity or proprietary SaaS components are included—data sovereignty and network isolation are maintained by default.

Applications

• Accelerated life testing (ALT) of lithium-ion battery modules under combined thermal-hygral stress
• Thermal shock qualification of solder joints and wire-bonded IC packages per JEDEC JESD22-A104
• Environmental stress screening (ESS) of avionics hardware prior to flight certification
• Moisture sensitivity level (MSL) preconditioning and reflow simulation for surface-mount components
• Validation of sealing integrity and material compatibility for IP67-rated enclosures
• Pre-compliance testing against IEC 60068-2-14 (change of temperature) and MIL-STD-810H Method 503.5

FAQ

What is the minimum dwell time between temperature transitions?

The controller supports dwell times as short as 1 minute; however, optimal thermal equilibrium for most DUTs is achieved with ≥5-minute dwells at target setpoints.

Can the chamber operate at constant humidity without temperature cycling?

Yes—standalone humidity hold mode is fully supported across the full 20–98 %RH range, with automatic dew-point compensation and steam generator modulation.

Is remote monitoring possible without third-party software?

Basic remote status viewing and manual start/stop commands are available via built-in web server (HTTP); no additional licensing or cloud service required.

Does the system include calibration certificates?

A factory-assembled NIST-traceable temperature/humidity calibration report is provided with each unit; ISO/IEC 17025-accredited field calibration services are available upon request.

What maintenance intervals are recommended for the refrigeration system?

Compressor oil and filter-drier replacement is advised every 24 months under continuous operation; annual verification of refrigerant charge and leak integrity is recommended.