JIS B 7724:2017规定了根据JIS Z 2243测定布氏硬度所用试验机的直接和间接验证方法。本标准适用于固定位置和便携式硬度试验机（以下简称试验机）。对于无法满足规定力-时间曲线的机器，可使用附录B修改力和试验循环的直接验证。

JIS B 7724:2017 specifies methods of direct and indirect verification of testing machines used for determining Brinell hardness in accordance with JIS Z 2243.This Standard is applicable to both fixed location and portable hardness testing machines (hereafter referred to as testing machines).For machines that are incapable of satisfying the specified force-time profile, the direct verification of force and testing cycle can be modified by the use of Annex B.