Memmert UN plus Series Dual-Display General Purpose Laboratory Drying Oven

Overview

The Memmert UN plus Series Dual-Display General Purpose Laboratory Drying Oven is engineered for precision thermal processing across research, quality control, and industrial validation environments. Based on forced or natural convection principles—selectable per application—the oven employs quadrilateral heating elements to ensure rapid thermal response and exceptional temperature uniformity (±0.5 °C) throughout the stainless steel (AISI 304) chamber. Its operational range spans from ambient +20 °C to 300 °C, making it suitable for drying, sterilization, annealing, moisture determination, polymer curing, and stability testing in accordance with ISO 17025, ASTM E145, and USP . The dual-TFT display architecture enables simultaneous visualization of setpoint/actual values, airflow status, and program progress—critical for GLP-compliant documentation and operator situational awareness.

Key Features

• Quadrilateral heating system with independently controlled zones ensures homogeneous heat distribution and minimizes thermal gradients across all chamber volumes (30–750 L).
• Dual high-resolution TFT touch displays provide real-time access to temperature profiles, fan speed, damper positions, and alarm history without menu navigation.
• Motorized, programmable air inlet and outlet dampers enable precise regulation of air exchange rates—from near-static conditions (e.g., powder drying) to defined volumetric flow (e.g., cable insulation aging per IEC 60811-501).
• Fresh air preheating module thermally equilibrates incoming ambient air prior to chamber introduction, eliminating cold-air-induced thermal shock and reducing process deviation during long-duration tests.
• ControlCOCKPIT™ firmware supports multi-step temperature ramp/soak programs, event-triggered damper adjustments, and configurable safety limits—including overtemperature cut-off and door-open detection with automatic power reduction.
• Compliance-ready architecture includes audit trail logging, user-level access control (admin/operator), and optional electronic signature support aligned with FDA 21 CFR Part 11 requirements.

Sample Compatibility & Compliance

The UN plus accommodates diverse sample geometries and material sensitivities through its modular chamber design and airflow adaptability. For granular or low-density samples (e.g., sand, grains, pharmaceutical excipients), reduced air exchange prevents particle displacement and mass loss artifacts. For high-thermal-mass specimens (e.g., coated wires, composite laminates), forced convection with optimized damper positioning ensures reproducible surface heat transfer coefficients. All models are CE-marked and comply with EN 61000-6-2 (immunity) and EN 61000-6-4 (emission) standards. Optional IQ/OQ documentation packages support installation and operational qualification under GMP and ISO 9001 frameworks.

Software & Data Management

AtmoCONTROL software (Windows-based, USB/Ethernet interface) enables remote configuration of temperature sequences, airflow schedules, and data export in CSV or PDF format. Logged parameters include timestamped chamber temperature, fan RPM, damper opening %, and preheat chamber delta-T. Data integrity is preserved via cyclic redundancy check (CRC)-protected internal memory and tamper-evident file encryption. Exported datasets meet ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) for regulatory submission.

Applications

• Moisture content analysis per AOAC 950.46 and ISO 5530-1 using gravimetric drying protocols.
• Thermal aging of elastomers and insulating materials per ASTM D573 and IEC 60216.
• Pre-conditioning of test specimens prior to tensile or impact testing (ISO 291, ASTM D618).
• Drying of filter papers, crucibles, and glassware in analytical chemistry workflows.
• Stability storage of reference standards and calibration materials under controlled thermal stress.
• Post-curing of adhesives and coatings where volatile organic compound (VOC) management requires regulated ventilation.

FAQ

What convection modes are available, and how do they affect thermal uniformity?
Natural convection is recommended for heat-sensitive or loosely packed samples requiring minimal air movement; forced convection delivers faster equilibration and tighter uniformity (±0.3 °C typical) across larger loads.
Is fresh air preheating mandatory, or can it be bypassed?
Preheating is always active—ambient air passes exclusively through the integrated preheat chamber before entering the main chamber. This eliminates uncontrolled thermal transients and is non-bypassable by design.
Can multiple UN plus units be synchronized for parallel testing?
Yes—via Ethernet-connected AtmoCONTROL networks, users can initiate identical programs across up to 16 ovens with centralized monitoring and consolidated reporting.
Does the dual-display interface support multi-language operation?
Yes—ControlCOCKPIT firmware includes English, German, French, Spanish, Italian, Chinese, and Japanese language packs, configurable per user profile.
What validation documentation is provided with the instrument?
Each unit ships with a factory-issued calibration certificate traceable to DKD/DAkkS standards, plus optional IQ/OQ templates compliant with EU Annex 15 and FDA guidance for laboratory equipment qualification.