DRETOP THS-CH150-II High-Low Temperature and Humidity Cycling Test Chamber

Overview

The DRETOP THS-CH150-II High-Low Temperature and Humidity Cycling Test Chamber is an engineered environmental simulation system designed for rigorous reliability validation of industrial components and electronic assemblies under dynamically alternating thermal and hygrothermal stress conditions. Based on the principles of forced-air convection, dual-stage refrigeration, and precision PID-controlled steam humidification, this chamber replicates complex real-world climatic profiles—including rapid temperature transitions, sustained high-humidity exposure, and cyclic dew-point excursions—to accelerate failure modes such as condensation-induced corrosion, solder joint fatigue, polymer swelling, and dielectric breakdown. With a certified operating range of −60 °C to +150 °C and programmable humidity control from 30 % to 95 % RH (extendable to 20–98 % RH upon specification), the THS-CH150-II meets the physical test requirements defined in MIL-STD-810G Method 502.6 (temperature shock), Method 507.6 (humidity), and Method 506.6 (sand and dust—when optionally equipped with particulate filtration). Its 150 L internal volume accommodates medium-scale PCB assemblies, automotive ECUs, LED modules, and medical device subassemblies while maintaining ≤2 °C temperature uniformity and ±0.5 °C stability across the working zone—verified per IEC 60068-3-5.

Key Features

• Independent dual-stage refrigeration system with imported hermetic compressors, enabling stable low-temperature operation down to −60 °C without freeze-up or oil migration issues.
• High-efficiency nickel-chromium heating elements combined with centrifugal forced-air circulation (optimized duct geometry and impeller design) ensure rapid ramp rates (1–3 °C/min heating; 0.7–1 °C/min cooling) and minimal overshoot during transitions.
• Steam-based humidification system with stainless-steel boiler and PID-modulated water feed delivers repeatable moisture control with ±3–5 % RH accuracy across the full operational band.
• Full-color 7-inch capacitive touchscreen HMI supporting 100 user-defined test programs, each configurable with up to 100 sequential segments—including ramp/soak/humidity hold steps, lighting activation triggers, and automatic power-cycle scheduling.
• Multi-tiered access control: administrator, engineer, and operator roles enforced via encrypted password management; all parameter changes logged with timestamp and user ID for audit readiness.
• Double-glazed, heated observation window with anti-fog coating prevents condensation and enables non-intrusive visual monitoring without thermal disturbance to the test chamber interior.
• Structural integrity validated per ISO 14644-1 Class 8 cleanroom-compatible construction: electrophoretically coated steel exterior, 304 stainless-steel interior with radius-rounded corners, and silicone gasketing rated for −70 °C to +180 °C service life.

Sample Compatibility & Compliance

The THS-CH150-II is routinely deployed in qualification testing of electronics per JEDEC JESD22-A104 (Temperature Cycling), A110 (Highly Accelerated Temperature and Humidity Stress Test), and IPC-9701 (Performance Testing of Solder Attachments). Its chamber dimensions (500 × 500 × 600 mm W×D×H) and standard 2 adjustable stainless-steel shelves accommodate samples up to 450 mm tall and 10 kg mass per shelf. Standard 50 mm diameter cable/port access penetrations support powered-in-situ testing under load (e.g., functional burn-in of automotive ADAS controllers or telecom baseband units). All control firmware and data logging comply with FDA 21 CFR Part 11 requirements for electronic records and signatures when configured with audit-trail-enabled software. The system conforms to electromagnetic compatibility standards EN 61326-1 and safety standards EN 61010-1, and its test methodology aligns with GLP and GMP documentation frameworks for regulated industries.

Software & Data Management

Embedded controller firmware supports local data storage (≥100,000 data points) with timestamped CSV export via USB or Ethernet. Optional DRETOP CloudLink™ software enables secure remote supervision across heterogeneous networks: simultaneous access by up to five authenticated users via web browser, iOS/Android app, or Windows desktop client—with synchronized UI mirroring and real-time parameter override capability. All session logs—including setpoint deviations, alarm events, compressor runtime, and heater duty cycles—are retained for ≥12 months and exportable in Excel or PDF formats compatible with PQ/OQ validation protocols. Firmware updates are delivered over-the-air with cryptographic signature verification to maintain system integrity.

Applications

• Accelerated life testing of printed circuit board assemblies (PCBAs) subjected to automotive under-hood thermal cycling (−40 °C ↔ +125 °C).
• Humidity resistance validation of conformal-coated sensors per ISO 6469-1 for electric vehicle battery management systems.
• Material compatibility screening of elastomeric seals and adhesives under combined thermal stress and 85 % RH at 85 °C (85/85 test).
• Pre-compliance environmental stress screening (ESS) for aerospace avionics per DO-160 Section 4 (temperature) and Section 10 (humidity).
• Reliability assessment of consumer electronics packaging integrity during simulated global distribution logistics (e.g., tropical port → arid inland warehouse).

FAQ

What is the minimum achievable temperature with humidity active?
The chamber maintains full humidity control down to −20 °C; below that, dehumidification is disabled to prevent ice formation in the steam generator.
Can the system be integrated into a factory MES or SCADA platform?
Yes—Modbus TCP and OPC UA interfaces are available as optional hardware modules for bidirectional communication with industrial automation systems.
Is calibration certification included with delivery?
A NIST-traceable temperature and humidity calibration report (per ISO/IEC 17025) is provided with initial commissioning; annual recalibration services are available under DRETOP’s certified service program.
How is over-temperature protection implemented?
Three independent thermal cutouts—mechanical high-limit switch, digital safety controller, and software-enforced upper bound—trigger immediate power cutoff and audible/visual alarms.
What maintenance intervals are recommended for long-term reliability?
Compressor oil and refrigerant levels should be verified every 12 months; steam boiler descaling and filter replacement are required quarterly under continuous operation.