Testing accuracy
Test accuracy is the degree to which measured values such as hardness or strength agree with the true values. It depends on calibration and execution.
Physical-Chemical Mechanism of Action
Test accuracy refers to how close a measured value is to the true physical value. This comparison can be made for hardness, strength, or other mechanical properties.
Metallurgical Relevance & Welding Risks
Poor test accuracy leads to wrong results in the workshop. This can cause unsuitable material selections, faulty welding procedures, or dangerous crack formation. For example, if a hardness tester reads too high, it can lead to excessive safety measures and unnecessary costs.
Workshop Practice & Instructions
To ensure test accuracy, measuring equipment must be calibrated regularly. This involves comparing the measurement result with a known standard or reference specimen. Measurements must be done according to manufacturer instructions to minimize systematic errors. An example of calibration could be that a hardness tester is calibrated every 6 months using a standard specimen, and the results are documented.