Memmert UFE500AO Forced-Convection Drying Oven

Overview

The Memmert UFE500AO is a precision-engineered forced-convection drying oven designed for demanding laboratory and industrial applications requiring thermal stability, reproducible heating profiles, and long-term operational reliability. Built upon Memmert’s decades-long heritage in climate-controlled instrumentation, the UFE500AO employs a robust convection architecture with adjustable airflow management to ensure uniform temperature distribution across its 108 L chamber. It operates on the principle of actively driven air circulation—using a high-efficiency fan and manually or motorized adjustable fresh-air dampers—to minimize thermal gradients and support consistent drying, curing, aging, and conditioning protocols. With a maximum operating temperature of 300 °C (excluding glass-door configurations), it complies with DIN 12880 for temperature homogeneity and is validated for use in GLP-compliant environments where traceable thermal performance is essential.

Key Features

• Chamber constructed entirely from 1.4301 stainless steel (ASTM 304 equivalent), deep-drawn for structural integrity and corrosion resistance; fully recyclable and wipe-clean
• Forced-air convection system with manual or servo-controlled fresh-air damper and 10% incremental fan speed adjustment (0–100%)
• E-Class (Excellence) control system featuring fuzzy-logic PID temperature regulation, triple overtemperature protection (TB Class 1, TWW Class 3.1, TWB Class 2), and dual 4-wire Pt100 A-class sensors with automatic self-calibration
• Integrated 1024 KB circular memory buffer storing all setpoints, actual values, timestamps, and error logs at 1-minute intervals—retaining ≥6 months of continuous data
• RS232 interface standard; compatible with Memmert’s Celsius 2007 software for PC-based programming, real-time monitoring, and audit-trail generation compliant with FDA 21 CFR Part 11 requirements
• Comprehensive safety architecture: mechanical temperature limiter, electronic overtemperature cutoff, microprocessor-based fault-diagnostic monitoring, and audible/visual alarm activation
• Configurable weekly scheduling with up to 40 ramp-hold segments per program; supports delay start, temperature hold, cooling phases, and repeat cycles (1–99 or infinite)

Sample Compatibility & Compliance

The UFE500AO accommodates a wide range of sample types—including polymer specimens, pharmaceutical excipients, ceramic precursors, metal coatings, and biological matrices—within its 108 L chamber. Five sliding stainless-steel shelves (max. load 30 kg per shelf; total chamber load 60 kg) provide flexible configuration. Its thermal performance meets DIN 12880 specifications for chamber uniformity (≤±2.2 °C at 150 °C) and stability (≤±0.25 °C deviation over time). The unit ships with a factory-issued calibration certificate verifying center-point performance at 160 °C. It is suitable for applications governed by ISO 17025, USP , ASTM D5423, and EN 61000-6-3 electromagnetic compatibility standards. Optional STERI chip cards enable automated sterilization cycles (e.g., 4 h at 160 °C) for incubator decontamination workflows.

Software & Data Management

Celsius 2007 software provides full remote control, validation support, and electronic recordkeeping. Users can define unlimited temperature ramps, damper positions, and fan speeds; export CSV-formatted logs; generate PDF reports with digital signatures; and configure user access levels. The system supports audit trails with timestamped operator actions, change history, and electronic signature capture—meeting GMP/GLP documentation requirements. Data integrity is reinforced via cyclic redundancy checks (CRC) and non-volatile memory backup. Parallel printer interface (PCL3-compatible) enables direct hardcopy output; USB adapters are available as accessories for modern peripheral integration.

Applications

• Moisture content determination per AOAC 950.46 and ISO 5530-1
• Thermal aging studies of elastomers and composites (ASTM D573, ISO 188)
• Pre-conditioning of test specimens prior to tensile, impact, or adhesion testing
• Drying of filter papers, crucibles, and volumetric glassware in analytical labs
• Stability testing of active pharmaceutical ingredients (APIs) under ICH Q1A guidelines
• Curing of powder coatings and epoxy resins in R&D and QC settings
• Residual solvent removal from synthesized organic compounds

FAQ

What is the maximum operating temperature for the UFE500AO?
The UFE500AO achieves a maximum temperature of 300 °C when equipped with a stainless-steel door; glass-door variants are limited to 250 °C.
Does the oven include built-in data logging capability?
Yes—it features an internal 1024 KB ring-buffer memory that records temperature setpoints, actual chamber values, timestamps, and error events at user-defined intervals (default: 1 minute), retaining approximately six months of continuous data.
Is the UFE500AO compliant with FDA 21 CFR Part 11?
When used with Celsius 2007 software and configured with electronic signatures, audit trails, and role-based access control, the system supports Part 11 compliance for regulated pharmaceutical and biotech environments.
Can the airflow be precisely controlled during operation?
Yes—the fan speed is adjustable in 10% increments (0–100%), and fresh-air intake is managed via either manual damper levers or optional servo-motor actuation for programmable segment-specific ventilation control.
What calibration documentation is provided with the unit?
Each UFE500AO ships with a single-point calibration certificate verifying temperature accuracy at the chamber center (160 °C for U-series models), traceable to national standards via DAkkS-accredited laboratories.