OLYMPUS MHVSX-50 Automatic Turret Digital Vickers Hardness Tester

Overview

The OLYMPUS MHVSX-50 is a fully automated digital Vickers hardness tester engineered for precision metallurgical and materials quality control laboratories. It operates on the principle of diamond pyramid indentation under controlled static load, where hardness is calculated from the surface area of the residual impression measured optically. The instrument employs a high-stiffness one-piece cast aluminum frame to eliminate mechanical drift and thermal deformation—critical for long-term repeatability in regulated environments. Its electromechanical loading system features a closed-loop force control architecture with high-resolution load cell feedback, ensuring accurate and consistent application across the full test force range (typically 0.3 kgf to 50 kgf, per ISO 6507-1). Unlike traditional dead-weight systems, this design enables real-time force compensation and dynamic stability during dwell time, minimizing overshoot and settling error. The MHVSX-50 meets the metrological requirements of ASTM E92, ISO 6507-1, and JIS Z 2244 for Vickers hardness testing of metals, ceramics, thin films, and case-hardened layers.

Key Features

• One-piece cast aluminum base structure for dimensional stability and vibration damping
• Electromechanical closed-loop loading system with automatic force compensation per test step
• Motorized automatic turret with precise positioning of Vickers indenter and optical objectives (10×, 20×, 40×)
• Dual-axis linear encoders integrated into the eyepiece assembly for direct D1/D2 diagonal measurement—eliminating parallax and operator-dependent reading errors
• 7-inch capacitive touchscreen interface with intuitive menu-driven navigation and multilingual GUI support
• 10-step adjustable high-CRI LED illumination for optimal contrast across reflective, matte, or coated surfaces
• Onboard calculation and display of HV, HB, HRB, and HRC values with traceable conversion algorithms per ASTM E140
• USB 2.0 port for direct export of test records—including indentation images, load/dwell parameters, D1/D2 values, hardness results, and statistical summaries—to Excel-compatible .xlsx files

Sample Compatibility & Compliance

The MHVSX-50 accommodates flat, polished, or ground specimens up to 150 mm in height and 200 mm × 200 mm in footprint. Its stage travel (X/Y: 100 × 100 mm) and Z-axis clearance allow for large components, cross-sectioned welds, and heat-treated parts. Specimen preparation follows ISO 6507-1 guidelines: surface finish ≤ 0.8 µm Ra, minimum thickness ≥ 10× indentation depth. The system supports GLP/GMP workflows through optional PC software with 21 CFR Part 11–compliant audit trail, electronic signatures, and user-access-level controls. Calibration verification is performed using certified reference blocks traceable to NIST or PTB standards, with documented uncertainty budgets available upon request.

Software & Data Management

While the MHVSX-50 operates autonomously via its embedded firmware, optional PC connectivity (RS-232 or USB virtual COM) enables remote control, batch test scheduling, and centralized data archiving. The companion software provides raw data logging, statistical process control (SPC) charts (X̄-R, Cp/Cpk), histogram generation, and customizable report templates compliant with internal QA protocols or external accreditation bodies (e.g., ISO/IEC 17025). All measurement events—including force application, dwell start/end, encoder readings, and manual overrides—are timestamped and logged with operator ID and instrument serial number. Data integrity is preserved through write-once export and encrypted local storage.

Applications

This instrument is routinely deployed in aerospace component certification (e.g., turbine blade coatings, Ti-6Al-4V substrates), automotive powertrain validation (gear teeth, camshafts, bearing races), electronics packaging (solder joint hardness, Cu pillar strength), and academic metallurgy research (grain boundary hardening, diffusion layer quantification). Its encoder-based measurement capability ensures reliability for shallow indentations (200 tests/day under ISO 17025 surveillance.

FAQ

Does the MHVSX-50 support ASTM E384 microhardness testing?
Yes—the system is configurable for loads down to 0.01 kgf when equipped with appropriate optics and calibration verification; however, standard configuration begins at 0.3 kgf.
Is the encoder measurement traceable to national standards?
Yes—dual-axis linear encoders are factory-calibrated against laser interferometry standards, with certificate of calibration included.
Can test data be integrated into LIMS or MES platforms?
Yes—via ASCII or CSV output formats over serial/USB; custom API integration is supported under OEM agreement.
What maintenance intervals are recommended for GLP compliance?
Annual verification of force accuracy and optical magnification calibration is advised, with daily verification using certified reference blocks prior to critical testing.
Is thermal drift compensated during extended test sequences?
The cast aluminum frame and low-power LED illumination minimize thermal gradients; no active temperature compensation is required within 20–26°C ambient range per ISO 6507-1.