YiHeng BPS Series Programmable Touchscreen Temperature and Humidity Controlled Chamber
| Brand | YiHeng |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Regional Classification | Domestic (China) |
| Model | BPS Series |
| Instrument Type | Upright Chamber |
| Temperature Range | L: −10 to 100 °C |
| A | −20 to 100 °C |
| B | −40 to 100 °C |
| Humidity Range | 35–95% RH (standard), 80–95% RH (high-stability mode) |
| Temperature Uniformity | ±0.5 °C (high-temp), ±1.0 °C (low-temp) |
| Humidity Deviation | ±3% RH |
| Heating Rate | 1–3 °C/min |
| Test Port | Φ25 mm |
| Controller Capacity | 100 programs × 1000 segments × 999 cycles |
| Segment Duration Max | 99 h 59 min |
| Communication Interface | RS-232 / RS-485 (optional) |
| Data Logging | Optional printer or PC interface for time-stamped温湿度曲线 export |
Overview
The YiHeng BPS Series Programmable Touchscreen Temperature and Humidity Controlled Chamber is an upright environmental test chamber engineered for precise, repeatable simulation of controlled thermal and hygrometric conditions. It operates on a dual-loop PID control architecture combined with TMHM (Temperature & Humidity Mutual Harmonization) balancing methodology—ensuring dynamic compensation between heating, cooling, humidification, and dehumidification subsystems. Designed for long-duration stability testing, accelerated aging studies, and material conditioning per ASTM D618, ISO 22088, and IEC 60068-2-78 standards, the chamber delivers high reproducibility in both laboratory and quality assurance environments. Its fully sealed refrigeration circuit uses eco-friendly R134a or R404A refrigerant (model-dependent), compliant with current EU F-Gas Regulation and China’s HCFC phase-out roadmap. The chamber’s structural integrity supports GLP-compliant operation when paired with validated software and audit-trail-enabled data acquisition.
Key Features
- Programmable touchscreen controller with 7-inch TFT-LCD display, supporting bilingual (English/Chinese) UI and real-time graphical visualization of temperature/humidity profiles.
- Triple-tier temperature range configuration: Standard (−10 to 100 °C), Extended Low-Temp (−20 to 100 °C), and Ultra-Low-Temp (−40 to 100 °C) variants—each calibrated per ISO/IEC 17025-accredited procedures.
- 304 stainless steel mirror-finish interior with radius-corner geometry and removable adjustable shelves—facilitating GMP-aligned cleaning validation and residue-free maintenance.
- Dual-stage safety architecture: Independent mechanical over-temperature cutoff (adjustable limit switch) plus electronic fault detection for compressor overheat, fan stall, phase loss, low refrigerant pressure, and water reservoir depletion.
- Energy-optimized air circulation system with axial flow blower and laminar duct design—achieving ≤±1.5% RH spatial uniformity and ≤±0.8 °C temperature uniformity across working volume (per IEC 60068-3-5).
- Power-failure recovery logic retains all setpoints, active program stage, and elapsed cycle count—resuming operation automatically upon mains restoration without manual reinitialization.
Sample Compatibility & Compliance
The BPS chamber accommodates diverse sample types—including polymer films, pharmaceutical packaging, electronic assemblies, textile specimens, and biological reference materials—within its standardized internal dimensions (configurable per BPS submodel; consult dimensional datasheet). All models comply with CE marking requirements under the EU Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. Humidity control performance meets ISO 12100 risk assessment criteria for condensation management, while refrigeration components adhere to ASHRAE Standard 15 safety protocols. For regulated industries, optional 21 CFR Part 11-compliant software modules support electronic signatures, user-level access control, and immutable audit trails—enabling qualification under FDA, EMA, and NMPA guidelines.
Software & Data Management
An optional PC-based monitoring suite provides remote supervision via RS-232 or RS-485 serial interface (Modbus RTU protocol). Users can define multi-step profiles offline, upload them to the controller, and download timestamped CSV logs containing temperature, humidity, alarm status, and cycle progression metadata. Data export supports traceability per ISO/IEC 17025 clause 7.5.2, including instrument ID, calibration due date, operator ID, and environmental context tags. When integrated with enterprise LIMS or MES platforms, the system enables automated report generation for IQ/OQ/PQ documentation packages.
Applications
- Accelerated shelf-life testing of moisture-sensitive pharmaceuticals and medical devices (per USP and ICH Q1A).
- Thermal cycling and humidity soak validation of automotive electronics per AEC-Q200.
- Dimensional stability evaluation of composite materials under cyclic RH/temperature stress (ASTM D5229/D5229M).
- Calibration verification of hygrometers and thermistors using NIST-traceable reference sensors.
- Pre-conditioning of test specimens prior to tensile, impact, or dielectric strength measurement (ISO 291, ASTM D618).
- Environmental stress screening (ESS) for aerospace components per MIL-STD-810H Method 507.6.
FAQ
What is the standard calibration certificate included with the BPS chamber?
Each unit ships with a factory-issued calibration report covering temperature (at three points: 25 °C, 60 °C, and −20 °C) and humidity (at 35%, 65%, and 90% RH), traceable to national metrology institutes.
Can the chamber maintain 80–95% RH at −40 °C?
No—high-humidity operation is not feasible below 0 °C due to physical condensation limits; the 80–95% RH range applies only within +10 °C to +85 °C ambient operating envelope.
Is remote firmware update supported?
Firmware updates require local USB connection using YiHeng’s authorized configuration tool; no over-the-air (OTA) capability is implemented for security and regulatory compliance reasons.
What is the maximum allowable load mass without compromising uniformity?
Maximum recommended payload is 20% of internal volume weight capacity (e.g., ≤15 kg for BPS-250); exceeding this may degrade spatial uniformity beyond specified tolerances.
Does the controller support custom alarm escalation protocols?
Yes—via optional Ethernet gateway module, users can configure SMTP email alerts, SNMP trap forwarding, or Modbus TCP event polling to external SCADA systems.
