Hardness Tester Calibration

Hardness Tester CalibrationHardness tester calibration should be performed on a periodic basis to verify that the accuracy of the instrument is within the manufacturer’s stated tolerances for the grade or model. As a hardness tester repeatedly measures the relative resistance of materials to denting, bending, or scratching, it can become misaligned. Calibration and adjustment will be required to restore its reliability.

LTI Metrology, near Philadelphia PA (USA), offers a complete package of services for your hardness testing equipment:

  • On-site calibration at your facility in PA, NJ, DE, MD and NY
  • Preventative maintenance and repair services
  • New indenters, blocks and hardness testers from our suppliers

Expertise to Calibrate Most Hardness Testers

Our A2LA accredited laboratory is qualified and equipped to calibrate most models of micro-hardness, Vickers, Knoop, Rockwell and other hardness testers per the applicable ASTM Standard. Special capabilities include:

  • Rockwell Hardness Tester calibration to C, B, A and E Scales
  • Superficial Rockwell Hardness Tester calibration including 15, 30, 45 N&T Scales

During hardness tester calibration, the expert technicians do the following:

  • Determine the accuracy of the tester
  • Make the necessary adjustments to bring the tester within the manufacturers’ tolerances
  • Perform preventative maintenance and repair services, if requested.

We’ll also provide a Certificate of Calibration and certify that results are traceable to NIST.

LTI Metrology Capabilities

Calibration services for the following models:

  • Rockwell scales C, B, A and E
  • Superficial Rockwell to 15, 30, 45 N&T Scales
  • Vickers & Knoop
  • Brinell
  • Micro-hardness testers
  • Leeb testers
  • Durometer testers
  • Analog manual and digital load cell types
  • Portable testers

The Hardness Tester Calibration Process

Prior to hardness tester calibration, the machine is leveled and inspected for chips, breaks or cracks. The calibration process involves verifying the condition of the anvil and indenter, then running five hardness tests on three certified hardness test blocks, representing the high, middle and low ranges on all scales being verified. If the instrument reads within the tolerances of the test blocks, the machine is deemed certifiable. This method of verification takes into account and combines all of the variables that produce the actual hardness number, just as would be done during actual testing.

Schedule All Your Calibration Services During One Visit

Our field calibration specialists also provide many other services in the field, including calibration for masters, measuring hand tools, gages and a variety of equipment that is generally not practical to ship for service. Make the most of your time and budget by scheduling services for all of your instruments and equipment in one visit.

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“Everything from quote to delivery went great, even had a brief tour of your facilities. Nice people, clean environment, and professional staff members…what more can I say? I am very happy I found your firm.”

Lee Cressman
Lab Analyst


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