Yaohua BPS Series Programmable Temperature and Humidity Controlled Chamber

Overview

The Yaohua BPS Series Programmable Temperature and Humidity Controlled Chamber is an engineered environmental test system designed for precise, repeatable simulation of climatic conditions in research laboratories, quality assurance departments, and industrial R&D facilities. Based on the principle of dual-loop feedback control—separate proportional-integral-derivative (PID) regulation for temperature and humidity—the chamber maintains stable thermal and hygrometric profiles across its working volume. It employs a forced-air convection system with optimized airflow distribution to minimize spatial gradients, ensuring compliance with ISO 17025 requirements for environmental condition monitoring during material aging, stability testing, and accelerated life-cycle evaluation. The chamber’s structural architecture integrates a seamless 304 stainless-steel interior with radius-rounded corners and removable shelving, supporting GLP-compliant cleaning protocols and residue-free sample handling.

Key Features

• 7-inch full-color capacitive touchscreen controller with intuitive graphical interface, supporting both English and Chinese language modes;
• Advanced fuzzy-PID control algorithm enabling dynamic compensation for load changes, ambient fluctuations, and door-opening events;
• Multi-stage programmability: up to 100 user-defined programs, each containing up to 1000 segments and 999 loop repetitions, with segment duration configurable up to 99 hours 59 minutes;
• Integrated safety architecture including independent over-temperature cut-off, compressor thermal overload protection, fan failure detection, refrigerant pressure monitoring, and low-water-level alarm for humidifier systems;
• Energy-efficient design utilizing R134a refrigerant and high-efficiency scroll compressors from globally certified OEM suppliers;
• Uniform air circulation via rear-mounted centrifugal blower and multi-directional baffle system, validated per ASTM E145 Annex A3 for temperature/humidity homogeneity;
• Lockable screen interface with password-protected parameter editing to prevent unauthorized modification during long-term unattended operation.

Sample Compatibility & Compliance

The BPS series accommodates a broad range of sample types—including pharmaceutical packaging, polymer films, electronic assemblies, battery cells, and biological specimens—within its thermally insulated workspace. Its stainless-steel chamber construction resists corrosion from saline mists, organic solvents, and repeated sterilization cycles. All models meet IEC 60068-2-1 (cold), IEC 60068-2-2 (dry heat), IEC 60068-2-30 (damp heat cyclic), and GB/T 10586 (Chinese national standard for environmental chambers). Optional validation packages support IQ/OQ documentation aligned with FDA 21 CFR Part 11 requirements, including electronic audit trails, user access logs, and tamper-proof data export functionality.

Software & Data Management

Standard communication interfaces include RS-232 and RS-485 ports for integration into centralized lab management systems, while the embedded USB port enables direct data transfer to external storage devices. Optional software (Yaohua ChamberLink™) provides remote configuration, real-time monitoring, historical trend analysis, and automated report generation in PDF or CSV format. All logged data—including timestamped temperature, relative humidity, setpoint deviation, and alarm events—is stored with checksum integrity verification. The system supports time-synchronized multi-chamber coordination for parallel test campaigns, and data files comply with ISO/IEC 17025 clause 7.5.2 for record retention and traceability.

Applications

• Accelerated stability testing of APIs and finished drug products per ICH Q1A(R2);
• Environmental stress screening (ESS) of printed circuit boards and automotive electronics;
• Moisture barrier performance evaluation of flexible packaging materials (ASTM F1249);
• Long-term aging studies of lithium-ion battery modules under variable thermal-hygrometric loads;
• Calibration and verification of hygrometers, thermometers, and data loggers;
• Material compatibility testing for aerospace composites exposed to tropical or arctic climatic profiles.

FAQ

What is the maximum allowable load volume inside the chamber without compromising uniformity?
The working chamber is rated for ≤70% volumetric loading; exceeding this threshold may reduce airflow efficiency and increase temperature/humidity gradient beyond ±1.0°C / ±3% RH specifications.
Can the BPS series be validated for GMP-compliant environments?
Yes—when equipped with optional validation accessories (e.g., calibrated reference sensors, IQ/OQ protocol templates, and electronic signature modules), the system meets EU Annex 15 and USP requirements for analytical instrument qualification.
Is remote firmware update supported?
Firmware updates require local USB-based installation using authenticated binaries provided by Yaohua Technical Support; network-based OTA updates are not implemented for security and regulatory reasons.
What is the typical recovery time after a 15-second door opening at 60°C / 85% RH?
Recovery to within ±0.5°C and ±2% RH of setpoint typically occurs within 8–12 minutes, depending on ambient conditions and internal load mass.
Are third-party calibration certificates available?
NIST-traceable calibration certificates (per ISO/IEC 17025) can be supplied upon request, covering temperature, humidity, and uniformity verification across three spatial points within the chamber volume.