CANNON Ravenfield BS/C+ High-Temperature High-Shear (HTHS) Viscometer
| Brand | CANNON |
|---|---|
| Origin | USA |
| Model | Ravenfield BS/C+ HTHS Viscometer |
| Instrument Type | Benchtop Fixed-Position Viscometer |
| Viscosity Range | 0–30 cP |
| Temperature Range | 40 °C to 180 °C |
| Temperature Resolution & Accuracy | ±0.02 °C |
| Shear Rate Range | 1×10⁵ s⁻¹ to 2×10⁶ s⁻¹ |
| Test Cycle Time | <5 min per sample |
| Repeatability | ≤2% RSD |
| Compliance | ASTM D4741, ASTM D4683 (correlative), SAE J300, ACEA Specifications |
| Optional Accessories | DR-Series Automated Sampler (up to 22 samples), LIMS Interface Module, Integrated Thermal Printer |
Overview
The CANNON Ravenfield BS/C+ High-Temperature High-Shear (HTHS) Viscometer is a precision-engineered benchtop instrument designed for the standardized measurement of dynamic viscosity under high-shear, elevated-temperature conditions—critical for evaluating the shear stability and rheological performance of engine oils, gear lubricants, and advanced synthetic formulations. It operates on the principle of capillary flow rheometry under controlled pressure-driven laminar flow, where sample viscosity is derived from the pressure drop across a precisely dimensioned capillary tube at defined temperatures and shear rates. This methodology directly aligns with the physical demands experienced by lubricants in journal bearings, piston ring zones, and other high-shear engine components. The system is fully compliant with ASTM D4741 (“Standard Test Method for Measuring Viscosity of Engine Oils at High Temperature and High Shear Rate Using a Tapered Bearing Simulator”), exhibits documented correlation with ASTM D4683 (“Standard Test Method for Measuring Viscosity of Engine Oils at High Temperature and High Shear Rate Using a Controlled-Stress Capillary Viscometer”), and satisfies the mandatory HTHS viscosity requirements outlined in SAE J300 (for SAE viscosity grade classification) and ACEA European oil sequences (e.g., ACEA A3/B4, C3, E9).
Key Features
- Microprocessor-controlled temperature regulation with dual platinum resistance thermometers (PRTs), delivering ±0.02 °C resolution and accuracy across the full 40 °C to 180 °C operating range—programmable in 0.1 °C increments.
- High-frequency variable-speed drive motor enabling precise shear rate control from 100,000 s⁻¹ to 2,000,000 s⁻¹, replicating real-world mechanical shear environments without extrapolation.
- Integrated viscosity calculation engine that automatically acquires pressure differential, flow time, and temperature data to compute kinematic and dynamic HTHS viscosity (in cP) per ASTM D4741 Annex A1.
- Built-in non-volatile memory stores complete test logs—including timestamps, calibration coefficients, operator ID, and raw sensor outputs—for traceability and audit readiness.
- Intuitive Windows-based software interface guides users through calibration, method selection, sample loading, and report generation—reducing operator dependency and minimizing procedural error.
- Modular architecture supports seamless integration of optional hardware: DR-Series automated sampler (22-position carousel), LIMS-compatible RS-232/USB output module with 21 CFR Part 11–ready audit trail logging, and embedded thermal printer for immediate hard-copy documentation.
Sample Compatibility & Compliance
The Ravenfield BS/C+ accommodates standard 10 mL or 20 mL glass vials and is validated for use with mineral, semi-synthetic, and full-synthetic engine oils—including low-SAPS (Sulfated Ash, Phosphorus, Sulfur) formulations required for modern aftertreatment systems. All test protocols adhere strictly to GLP (Good Laboratory Practice) and GMP-aligned documentation practices. Calibration is traceable to NIST-certified reference oils, and the system supports multi-point calibration verification per ASTM D4741 Section 8. Data integrity is reinforced via electronic signatures, user access levels, and immutable timestamped records—facilitating FDA 21 CFR Part 11 compliance when configured with the LIMS module. Routine verification checks for temperature uniformity, pressure transducer linearity, and capillary geometry integrity are built into the software’s maintenance scheduler.
Software & Data Management
The proprietary CANNON ViscoControl™ software provides a validated, password-protected environment for method development, instrument configuration, and result review. Each test generates a structured XML-based data file containing raw sensor readings, calculated viscosity values, metadata (operator, date/time, method ID), and digital signatures. Export formats include CSV, PDF (with embedded calibration certificates), and direct database push to LIMS platforms via ODBC or HL7-compliant drivers. Audit trails record all user actions—including parameter edits, calibration events, and report deletions—with IP address, workstation ID, and action timestamp. Software validation documentation (IQ/OQ/PQ protocols) and electronic signature templates are provided for regulated laboratory deployment.
Applications
- HTHS viscosity certification for API SP, ILSAC GF-6, and ACEA 2021 specifications.
- Shear stability assessment of polymer-thickened multigrade oils during formulation development.
- Quality control release testing of finished lubricants prior to shipment.
- Research into viscosity index improver (VII) degradation kinetics under accelerated thermal-shear stress.
- Correlation studies between HTHS behavior and field performance metrics such as wear scar diameter (ASTM D5183) or oxidation resistance (ASTM D2896).
- Supporting OEM-specific lubricant qualification protocols requiring repeatable, high-fidelity shear-rate-dependent viscosity data.
FAQ
What standards does the Ravenfield BS/C+ officially comply with?
It is fully compliant with ASTM D4741 and meets the technical requirements of SAE J300 and ACEA specifications. Correlation data supporting equivalence with ASTM D4683 is available upon request.
Is the instrument suitable for regulatory submissions?
Yes—when deployed with the LIMS Interface Module and validated software, it supports 21 CFR Part 11 compliance, including electronic signatures, audit trails, and data integrity controls required for FDA or EMA submissions.
Can the system operate unattended overnight?
With the DR-Series automated sampler installed and properly configured, up to 22 samples can be processed sequentially without manual intervention, including automatic cleaning cycles between runs.
What maintenance is required to ensure long-term accuracy?
Daily verification using certified reference oils, quarterly capillary inspection, and annual calibration of pressure transducers and temperature sensors per ASTM D4741 Section 9 are recommended. Full service kits and NIST-traceable calibration services are available directly from CANNON.
Does the system support custom test protocols beyond standard methods?
Yes—the software allows creation of user-defined methods with programmable temperature ramps, shear rate profiles, dwell times, and pass/fail criteria, enabling application-specific research workflows.
