AUCMA CX-1020 Chromatography Refrigerator

Overview

The AUCMA CX-1020 Chromatography Refrigerator is a purpose-engineered low-temperature storage and operational platform designed specifically for biomolecular separation workflows requiring precise, stable thermal control. Unlike general-purpose laboratory refrigerators, the CX-1020 integrates chromatographic process requirements—including column stability, reagent integrity, and operator accessibility—into its mechanical and control architecture. It operates on a forced-air convection system using R134a refrigerant, delivering uniform temperature distribution (±0.5 °C spatial deviation across load volume) within the 2–8 °C operating range—a critical band aligned with ICH Q5C stability guidelines for biopharmaceutical intermediates and USP recommendations for chromatographic mobile phase storage. Its 1020 L internal volume accommodates multiple large-format columns (e.g., ÄKTA-ready systems), fraction collectors, and ancillary tubing without compromising airflow or thermal homogeneity.

Key Features

• Microprocessor-based digital controller with 0.1 °C setpoint resolution and real-time display; supports password-protected parameter locking to prevent unauthorized adjustments during GLP-compliant runs.
• Redundant safety architecture: dual independent temperature sensors, audible/visual high/low temperature alarms, sensor fault detection, and compressor start-stop delay logic compliant with IEC 60335-2-89 for refrigerated medical equipment.
• EBM high-efficiency axial fans for evaporator and condenser circuits ensure rapid cooldown (<120 min from 25 °C ambient to 4 °C setpoint) and minimal temperature fluctuation (<±0.3 °C over 24 h under 50% load).
• Stainless steel interior (SUS304) with seamless welded corners, corrosion-resistant shelving supports, and fully removable multi-tier adjustable shelves (up to 6 levels, 30 kg capacity per shelf).
• Double-glazed low-emissivity tempered glass door with integrated anti-condensation heating strip and mechanical lock; UV-C germicidal lamp (254 nm, 15 W) with automatic cut-off upon door opening per IEC 62471 photobiological safety requirements.
• Two 50 mm diameter external access ports (left/right side), pre-sealed with silicone grommets, enabling uninterrupted connection of temperature probes, pressure lines, or fraction collector tubing without thermal leakage.

Sample Compatibility & Compliance

The CX-1020 maintains thermal integrity for a broad spectrum of chromatographic applications: size-exclusion (SEC), ion-exchange (IEX), hydrophobic interaction (HIC), and affinity chromatography of proteins, monoclonal antibodies, nucleic acids, and synthetic peptides. Its temperature uniformity profile meets the spatial stability criteria specified in ISO 15197:2013 Annex C for analytical cold chain instrumentation and aligns with FDA 21 CFR Part 11 requirements for electronic record retention when paired with optional data logger integration. The cabinet complies with Chinese national standard GB/T 20154–2014 for chromatography refrigerators and satisfies electromagnetic compatibility (EMC) per IEC 61000-6-3 and electrical safety per GB 4706.1–2005 (equivalent to IEC 60335-1).

Software & Data Management

While the CX-1020 features an embedded standalone controller, it supports analog voltage output (0–5 V DC) for external temperature logging via third-party DAQ systems. Optional RS485 Modbus RTU interface enables integration into centralized lab infrastructure (e.g., LabVantage, Thermo Fisher SampleManager) for audit-trail-enabled temperature monitoring. All alarm events—including duration, timestamp, and recovery status—are stored locally for ≥30 days and exportable via USB port. Firmware adheres to ALCOA+ principles: attributable, legible, contemporaneous, original, accurate, complete, consistent, enduring, and available—ensuring traceability in GMP/GLP-regulated environments.

Applications

• Continuous operation of preparative and analytical HPLC/UHPLC systems with column ovens and autosamplers requiring ambient-coupled cooling.
• Long-term storage of temperature-sensitive affinity resins (e.g., Protein A, Ni-NTA) and immobilized enzymes without activity loss.
• Buffer and mobile phase conditioning at controlled temperatures to minimize viscosity drift and improve retention time reproducibility.
• Post-run fraction collection and intermediate storage prior to lyophilization or further purification steps.
• Backup cold storage for QC/QA reference standards, calibration materials, and biological controls under ISO/IEC 17025 clause 5.8.2.

FAQ

What is the maximum column height compatible with the CX-1020’s interior configuration?
The internal height clearance is 1720 mm (after accounting for base plate and top insulation layer), accommodating standard 100 cm preparative columns with additional space for fittings and drip trays.
Does the unit support validation documentation packages (IQ/OQ/PQ)?
Yes—AUCMA provides factory-issued calibration certificates traceable to NIM (National Institute of Metrology, China) and can supply customizable IQ/OQ protocols aligned with ASTM E2500 and EU Annex 15 requirements.
Can the UV-C lamp be operated independently of the main refrigeration cycle?
Yes—the UV disinfection function is manually activated via dedicated front-panel button and operates only when the door is fully closed and locked.
Is remote monitoring possible without additional hardware?
No—remote access requires optional RS485-to-Ethernet gateway or integration with existing building management systems (BMS) via Modbus TCP.
What maintenance intervals are recommended for optimal performance?
Condenser coil cleaning every 6 months (or more frequently in dusty environments); annual verification of temperature sensor calibration and alarm response thresholds by authorized service personnel.