Yuelian PW-CTH100 Dual 85 Temperature and Humidity Environmental Test Chamber

Overview

The Yuelian PW-CTH100 Dual 85 Temperature and Humidity Environmental Test Chamber is an upright, precision-engineered chamber designed for accelerated environmental stress testing under sustained high-temperature and high-humidity conditions. It operates on the principle of controlled convective air circulation combined with saturated steam injection and refrigerant-based dehumidification, enabling stable maintenance of demanding test profiles such as 85°C/85% RH — a widely adopted stress condition for evaluating moisture ingress, polymer hydrolysis, solder joint reliability, and dielectric stability in electronics, packaging materials, adhesives, and coated substrates. The chamber’s thermal and hygrometric control architecture is optimized for long-duration, unattended operation—supporting continuous exposure tests exceeding 1,000 hours while maintaining traceable repeatability across multiple test cycles. Its compact internal volume (100 L) and robust mechanical design make it suitable for laboratory-scale qualification, incoming QC screening, and pre-compliance validation prior to formal IEC 60068-2-30 or JEDEC JESD22-A101 testing.

Key Features

• High-fidelity dual-control system with independent PID tuning for temperature and relative humidity—ensuring simultaneous stabilization at extreme setpoints (e.g., 65°C/95% RH or 55°C/98% RH).
• Mirror-finish SUS#304 stainless steel inner chamber with seamless welding and electropolished surface finish—resistant to corrosion, condensation buildup, and microbial growth during prolonged high-RH operation.
• 7-inch full-color touchscreen controller with intuitive bilingual (English/Chinese) UI, real-time graphical display of setpoint vs. actual curves, and programmable alarm thresholds for over-temperature, over-humidity, sensor failure, and door-open events.
• Integrated dry-run protection circuit prevents heater damage during low-water or no-load conditions—a critical safeguard for extended 85/85 cycling.
• Acoustically damped insulation and low-noise axial fan assembly ensure ambient noise levels ≤55 dB(A) at 1 m distance—enabling installation in shared lab environments without acoustic isolation.
• Modular program logic supports nested loops, partial cycle execution, and cross-program linking—facilitating complex multi-step protocols aligned with MIL-STD-810H Method 507.6 or IPC-9701A requirements.

Sample Compatibility & Compliance

The PW-CTH100 accommodates standard test specimens up to 10 kg per shelf, with two adjustable SUS#304 grid shelves included. Its Ø100 mm left-side test port enables external cabling for in-situ electrical monitoring (e.g., leakage current, impedance spectroscopy) without compromising chamber integrity. While not certified to ISO/IEC 17025 or accredited per ILAC-MRA, the chamber meets fundamental metrological criteria referenced in ASTM E145–22 (Standard Specification for Gravity-Convection and Forced-Ventilation Ovens) and IEC 60068-3-5 (Environmental testing — Part 3-5: Supporting documentation and guidance — Confirmation of the performance of temperature chambers). All temperature and humidity sensors are NIST-traceable upon factory calibration, and the controller logs timestamped operational data—including deviations exceeding ±0.5°C or ±2.0% RH—for GLP-aligned record retention. Optional pure-water generation systems eliminate mineral deposits in the humidifier, supporting compliance with USP and ISO 14644-1 Class 8 cleanroom-compatible operation when installed in controlled environments.

Software & Data Management

The built-in controller supports RS485/RS232 communication via Modbus RTU protocol, enabling integration with third-party SCADA platforms or custom LabVIEW-based monitoring systems. Optional PC software (supplied free of charge) provides full remote programming, real-time data streaming (1 Hz sampling), automated report generation (PDF/CSV), and audit-trail-enabled user access logs—meeting foundational elements of FDA 21 CFR Part 11 for electronic records where local regulatory interpretation permits. All executed programs are stored with metadata including operator ID, start/stop timestamps, and cumulative runtime counters. Data export includes raw sensor readings, alarm history, and deviation flags—structured for import into statistical process control (SPC) tools such as Minitab or JMP.

Applications

• Accelerated aging of polymeric encapsulants, conformal coatings, and flexible printed circuits under JEDEC-defined 85/85 conditions.
• Evaluation of moisture absorption kinetics and dimensional stability in biodegradable packaging films (ASTM D5364).
• Qualification of lithium-ion battery cell housings and sealants for automotive EV applications per ISO 16750-4.
• Stress screening of optical adhesives and AR-coated lenses exposed to tropical climatic profiles (IEC 60068-2-30, Test Db).
• Pre-compliance verification of medical device enclosures per ISO 14971 risk management requirements for environmental degradation pathways.

FAQ

What does “Dual 85” refer to in this chamber’s designation?
It denotes the chamber’s validated capability to maintain 85°C temperature and 85% relative humidity simultaneously—a benchmark stress profile used globally for reliability assessment of electronics and polymers.
Is the controller compliant with 21 CFR Part 11 for electronic signatures?
The base controller supports audit trails and user-level access control; however, full Part 11 compliance requires additional validation documentation and procedural controls implemented by the end user per their quality system.
Can this chamber perform cooling or sub-ambient humidity testing?
No—it is a heat-and-humidify-only chamber. It does not include refrigeration or active dehumidification below ambient dew point; its minimum operating humidity is 80% RH.
What calibration documentation is provided with shipment?
Each unit ships with a factory calibration certificate listing as-tested values for temperature (at 60°C, 85°C, 120°C) and humidity (at 85% RH, 95% RH), traceable to national standards via accredited subcontractors.
Is stainless steel interior required for all applications?
Yes—SUS#304 is mandatory for high-RH operation to prevent rust-induced contamination and ensure long-term sensor accuracy; carbon steel interiors are unsuitable for sustained >90% RH exposure.