ISO 6508-2:2015规定了根据ISO 6508-1:2015测定洛氏硬度的试验机（直接和间接）的两种单独验证方法，以及洛氏硬度压头的验证方法。 直接验证方法用于确定与机器功能相关的主要参数，如施加的力、深度测量和测试循环时间是否在规定公差范围内。间接验证方法使用多个校准的参考硬度块来确定机器测量已知硬度材料的能力。 间接方法可单独用于运行中机器的定期例行检查。 如果试验机也用于其他硬度试验方法，则应对每种方法进行单独验证。 ISO 6508-2:2015适用于固定式和便携式硬度试验机。 值得注意的是，球压头使用碳化钨复合材料被认为是洛氏压头球的标准类型。只有符合ISO 6508‑1:2015附录A的要求，才能继续使用钢压头球。

ISO 6508-2:2015 specifies two separate methods of verification of testing machines (direct and indirect) for determining Rockwell hardness in accordance with ISO 6508‑1:2015, together with a method for verifying Rockwell hardness indenters. The direct verification method is used to determine whether the main parameters associated with the machine function, such as applied force, depth measurement, and testing cycle timing, fall within specified tolerances. The indirect verification method uses a number of calibrated reference hardness blocks to determine how well the machine can measure a material of known hardness. The indirect method may be used on its own for periodic routine checking of the machine in service. If a testing machine is also to be used for other methods of hardness testing, it shall be verified independently for each method. ISO 6508-2:2015 is applicable to stationary and portable hardness testing machines. Attention is drawn to the fact that the use of tungsten carbide composite for ball indenters is considered to be the standard type of Rockwell indenter ball. Steel indenter balls may continue to be used only when complying with ISO 6508‑1:2015, Annex A.