JJG 610 - 2013 is a verification specification for type A Barb hardness tester. It specifies the scope of application of type A Barb hardness tester in detail, covering the technical requirements of the hardness tester, including key indicators such as measurement accuracy. It clarifies the standard equipment and environmental conditions required for verification, and describes the specific verification items and method steps, such as the selection and use of hardness blocks. At the same time, it explains the processing and judgment criteria of the verification results, providing a comprehensive and standardized basis for ensuring the accuracy and reliability of type A Barb hardness tester, and ensuring its effective application in the relevant hardness measurement field.