IKA ROTAVISC me-vi HELI Complete Rotational Viscometer

Overview

The IKA ROTAVISC me-vi HELI Complete is a high-precision benchtop rotational viscometer engineered for reliable, traceable viscosity characterization of medium-to-high-viscosity Newtonian and non-Newtonian fluids across R&D, quality control, and production environments. Based on the Couette principle, it measures dynamic viscosity by quantifying the torque required to rotate a spindle (e.g., SP7–SP12) at a defined angular velocity within a fluid sample under controlled thermal conditions. Its integrated HELISTAND motorized lift system enables programmable, repeatable immersion and withdrawal of the measuring spindle—critical for eliminating operator-induced variability and ensuring consistent measurement geometry per ASTM D2196 and ISO 2555. Designed and manufactured in Staufen, Germany, the instrument complies with IEC 61000-6-3 (EMC), IEC 61010-1 (safety), and meets essential requirements for CE marking under the EU Machinery Directive.

Key Features

• Motorized HELISTAND lift mechanism with 142 mm vertical travel and 61 mm active stroke—enables precise, reproducible spindle positioning and automated immersion cycles.
• 4.3″ full-color TFT touchscreen interface with intuitive menu navigation, real-time graphical display (viscosity vs. time, shear rate vs. shear stress), and built-in electronic level calibration for rapid horizontal alignment.
• Continuous speed control from 0.01 to 200 rpm with ±0.01 rpm resolution; supports ramped speed profiles (RAMP function) for structured shear-thinning/thickening analysis.
• Integrated PT100 temperature sensor input and optional external cryo/high-temp bath compatibility support viscosity measurements across an extended thermal range (−100 to +300 °C) with ±0.1 K accuracy.
• Comprehensive torque sensing (0.7187 mN·m full scale) and real-time torque display, enabling direct detection of yield points, thixotropic recovery, and structural breakdown.
• Dual communication interfaces (RS-232 and USB) for seamless integration into LIMS or MES systems; supports GLP/GMP-compliant data export with timestamp, operator ID, and method metadata.

Sample Compatibility & Compliance

The ROTAVISC me-vi HELI Complete accommodates standard cylindrical sample containers (up to 600 mL volume) and accepts all IKA SP-series spindles—including low-shear T-type geometries for structured gels and pastes. Its modular design permits use with coaxial cylinder, cone-plate, and vane geometries via optional adapters, extending applicability to emulsions, polymer melts, pharmaceutical suspensions, and battery slurries. The system meets key regulatory expectations for analytical instrumentation: audit-trail-ready data logging aligns with FDA 21 CFR Part 11 principles when used with validated software; temperature and speed calibration routines satisfy ISO/IEC 17025 traceability requirements; and mechanical construction adheres to DIN EN 60529 (IP40) for protection against solid ingress in laboratory settings.

Software & Data Management

While the instrument operates autonomously via its embedded firmware, raw and processed data—including viscosity, torque, temperature, shear rate, and shear stress—are exportable in CSV format via USB or RS-232. Timestamped measurement records include instrument serial number, spindle ID, speed profile, thermal setpoint, and user-defined batch ID. Optional IKA Labworldsoft™ software (v4.0+) provides advanced rheological modeling (e.g., power-law, Herschel-Bulkley fitting), multi-curve overlay, statistical process control (SPC) charting, and automated report generation compliant with internal QA templates. All data files retain immutable metadata required for GLP audits and ISO 9001 documentation workflows.

Applications

• Quality assurance of adhesives, sealants, and coatings where batch-to-batch consistency of flow behavior dictates application performance.
• Rheological profiling of food products (e.g., ketchup, mayonnaise, dairy creams) to correlate viscosity hysteresis with sensory texture attributes.
• Characterization of lithium-ion battery cathode/anode slurries during formulation development, including settling stability and pumping viscosity at low shear.
• Monitoring thermal degradation of thermoplastics and reactive resins under isothermal or programmed temperature ramps.
• Pharmaceutical excipient screening—e.g., hydroxypropyl methylcellulose (HPMC) solutions—under USP gelation testing protocols.
• Academic research in soft matter physics, focusing on transient viscoelastic responses and time-dependent structural recovery.

FAQ

Does the ROTAVISC me-vi HELI Complete support ASTM D1092 or ISO 3219 compliance?
Yes—when operated with certified spindles, calibrated temperature probes, and documented SOPs, it fulfills the instrumental requirements of both standards for rotational viscosity measurement.
Can the instrument perform yield stress determination?
It supports indirect yield estimation via controlled-stress ramp tests using torque and speed data; for definitive yield value reporting, optional vane spindle kits and dedicated rheology software modules are recommended.
Is the HELISTAND lift system compatible with third-party temperature baths?
Yes—the 16 mm diameter support column and standardized mounting interface allow secure mechanical coupling with most commercial Peltier or circulating baths equipped with lift-compatible fixtures.
What calibration certificates are supplied with the system?
Each unit ships with a factory-issued calibration certificate for viscosity (using NIST-traceable silicone oils), speed, and temperature; additional accredited calibration services are available through IKA’s global service network.
How is data integrity ensured during long-duration measurements?
The embedded controller logs all parameters at ≥1 Hz with internal timekeeping synchronized to UTC; power-loss recovery preserves current measurement state and resumes logging upon reconnection without data gaps.