HX-VIS1050 Spectra Invent Grease Apparent Viscosity Tester
| Brand | Spectra Invent (Chinainvent) |
|---|---|
| Origin | Beijing, China |
| Model | HX-VIS1050 |
| Power | 2000 W |
| Capillary Dispensing Accuracy | ±0.2 mL |
| Compliance | SH/T 0048 |
Overview
The HX-VIS1050 Spectra Invent Grease Apparent Viscosity Tester is a precision-engineered laboratory instrument designed for the standardized determination of apparent viscosity of lubricating greases under controlled shear and thermal conditions. It operates on the principle of capillary flow rheometry—measuring the time required for a defined volume of grease to pass through a calibrated capillary tube under gravity-driven flow at specified temperatures. This method aligns with the fundamental physical definition of apparent viscosity as the ratio of shear stress to shear rate under non-Newtonian flow conditions, which is critical for characterizing semi-solid lubricants where structural breakdown and thixotropic recovery significantly influence flow behavior. The system integrates a dual-module architecture: a fully automated capillary viscometer unit and a dedicated low-temperature cooling source engineered to maintain stable bath temperatures from –20 °C to +100 °C with ±0.1 °C stability—essential for replicating service-relevant thermal environments in bearing, gear, and chassis lubrication applications.
Key Features
- Automated capillary viscometry platform compliant with SH/T 0048, the Chinese national standard equivalent to ASTM D1092 and ISO 2176 for grease apparent viscosity measurement.
- Dual-zone temperature control architecture: independent regulation of cooling bath and capillary immersion zone ensures thermal homogeneity across sample and orifice during measurement cycles.
- High-stability refrigerated cooling source with PID-controlled compressor-based circulation, capable of sustained operation at –20 °C without external chiller dependency.
- Motorized capillary positioning and programmable dispensing mechanism with ±0.2 mL volumetric accuracy, minimizing operator-induced variability in sample loading.
- Integrated digital timing module synchronized with optical flow detection, eliminating manual stopwatch error and enabling repeatable dwell-time capture per ASTM D1092 Annex A1.
- Rugged stainless-steel construction with IP54-rated enclosure for long-term reliability in QC laboratories operating under GLP-compliant workflows.
Sample Compatibility & Compliance
The HX-VIS1050 accommodates NLGI grades 000 through 3 greases—including lithium, calcium, polyurea, and complex soap-thickened formulations—as well as organoclay- and PTFE-fortified specialty greases. Sample volume requirements range from 15–25 mL depending on NLGI grade and capillary selection. All operational protocols adhere strictly to SH/T 0048, which specifies conditioning procedures (e.g., 30-min homogenization at test temperature), capillary geometry tolerances (inner diameter 1.02–1.06 mm), and allowable flow time windows (30–600 s). Instrument validation includes traceable calibration against NIST-traceable reference oils and certified capillary constants. The system supports audit-ready documentation for ISO/IEC 17025-accredited labs and meets baseline data integrity requirements aligned with FDA 21 CFR Part 11 when paired with validated Spectra Invent DataLink software (optional add-on).
Software & Data Management
While the base HX-VIS1050 operates via embedded microcontroller with LED interface for standalone use, optional Spectra Invent DataLink v3.2 software enables full PC-based control, real-time viscosity trend visualization, and automated report generation in PDF/XLS formats. DataLink enforces electronic signature workflows, user role-based access control (admin/operator/auditor), and immutable audit trails—including timestamps for parameter changes, calibration events, and result exports. Raw timing data, temperature logs, and calculated apparent viscosity values (in mPa·s or cP) are stored with SHA-256 hashing to ensure forensic data integrity. Exported reports include metadata fields compliant with ISO 17025 clause 7.8.2 (result reporting) and support direct integration into LIMS platforms via CSV or ODBC drivers.
Applications
- Quality control of incoming grease batches against supplier specifications and internal NLGI grade targets.
- Formulation development for high-temperature wheel bearing greases requiring stable apparent viscosity below –15 °C.
- Stability assessment of biodegradable calcium sulfonate greases under extended thermal cycling (–10 °C ↔ 80 °C).
- Comparative analysis of thickener efficiency across lithium-12-hydroxystearate vs. bentonite-clay systems at identical base oil viscosities.
- Regulatory submission support for OEM lubricant approvals requiring SH/T 0048 or ASTM D1092 test records.
- Root-cause investigation of pumpability failures in cold-climate automotive chassis lubrication systems.
FAQ
What standards does the HX-VIS1050 comply with?
It is fully compliant with SH/T 0048 and technically aligned with ASTM D1092 and ISO 2176 for grease apparent viscosity testing.
Can the instrument measure greases thicker than NLGI Grade 3?
No—it is optimized for NLGI 000 to 3; higher grades require alternative methods such as cone penetration or rotational rheometry.
Is external refrigeration required for sub-zero operation?
No—the integrated compressor-based cooling source achieves and maintains –20 °C without auxiliary chillers.
How is calibration verified?
Using NIST-traceable reference oils and certified capillary constant certificates provided with each delivery.
Does the system support multi-user environments with audit trails?
Yes—when used with optional DataLink v3.2 software, it provides role-based access, electronic signatures, and 21 CFR Part 11–compliant audit logging.
