All you need to
know.

When relevant measurements are taken on components, the standard-compliant functionality and accuracy of the hardness testing machine and all measurement-related components must be ensured. The hardness testing standards (ISO, ASTM) define clear rules for how this must be demonstrated and monitored. This requirement for monitoring applies to every test method used and every degree of loading.

As an initial check of the accuracy of a hardness tester, for example for new machines or after changes have been made, calibration is required.

The precision of the hardness testing machine must also be checked regularly as part of a periodic daily or weekly test, even after calibration. How these tests are performed and the permissible deviations of the results are precisely defined for each test method and series of standards (ASTM, ISO).

All standard-compliant tests performed for monitoring the hardness tester must be documented.