Accredited UTM Calibration Services

The accuracy of your tensile and compression data is only as reliable as the calibration of your Universal Testing Machine. At DRS Technologies, we provide comprehensive, ISO/IEC 17025 accredited UTM calibration services. We ensure your load frames, whether hydraulic or electromechanical, provide the precise force and displacement measurements required for ASTM, ISO, and DIN material testing standards.

Why Compliance with ASTM E4 and ISO 7500-1 is Mandatory

In the automotive, aerospace, and construction industries, structural integrity is paramount. A UTM that is out of calibration can lead to overestimating material strength, resulting in product failure and liability. Calibration by DRS Technologies ensures your machine meets the $\pm$1.0% error limit (or better) required by ASTM E4, providing legally defensible data for your quality control systems.

Our Technical UTM Calibration and Verification Process

Our metrology experts perform on-site calibrations using high-precision master load cells and laser interferometers:

  1. Force Verification (Tension/Compression): We verify the load frame at multiple points across its range (e.g., 10%, 20%, 40%, 70%, 100% of capacity) in both tension and compression modes to ensure linearity and repeatability.

  2. Crosshead Speed and Displacement: We verify the accuracy of the crosshead movement speed and travel distance, which are critical for calculating strain rates and elongation.

  3. Extensometer Calibration (ASTM E83): If your testing requires high-elongation accuracy, we calibrate your extensometers to ensure precise strain measurements within their specific Class (e.g., Class B-1 or C).

  4. Alignment and Grip Inspection: We audit the axial alignment of the grips to ensure that the force applied is perfectly centered, preventing “side-loading” errors that can skew results.

  5. Certification and Traceability: You receive a detailed Calibration Report featuring “As-Found” and “As-Left” data, uncertainty budgets, and documented NIST traceability for all reference standards used.

Specialized Support for Leading UTM Manufacturers

DRS Technologies provides elite-level field service for all major testing brands, including:

  • Instron: Electromechanical and hydraulic force models (3300, 5500, 5900 series).

  • MTS: Insight and Criterion series, including high-capacity hydraulic frames.

  • Tinius Olsen: Support for both benchtop and floor-standing universal testers.

  • Shimadzu & ZwickRoell: Precision calibration for high-speed and micro-testing systems.

Frequently Asked Questions

What is the difference between ASTM E4 and ASTM E83?

ASTM E4 covers the verification of the force-measuring system of the UTM (the load cell and electronics). ASTM E83 covers the verification of the extensometer, which measures the actual strain or deformation of the specimen itself. For a complete material profile, both systems must be calibrated.

How often should a UTM be calibrated?

Standard industry requirements and ISO 17025 guidelines mandate a twelve-month calibration interval. Additionally, your machine must be recalibrated if it is moved to a new location, undergoes a major repair, or if a load cell is replaced.

Can you calibrate UTMs with high-capacity loads (e.g., 600kN)?

Yes. DRS Technologies maintains a fleet of high-capacity reference load cells and hydraulic calibration kits capable of verifying machines from low-capacity benchtop models up to massive industrial frames used for concrete and steel testing.