Hardness Tester Calibration
Hardness 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, offers a complete package of services for your hardness testing equipment:
- On-site calibration at your facility
- Preventative maintenance and repair services
- Indenters, blocks and new 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
- Certify the tester back to the National Institute of Standards and Technology (NIST)
Don’t forget to ask for preventative maintenance and repair services, if needed.
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
- 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.