ISO 230的这一部分规定了对角线位移试验，该试验允许估计机床的体积性能。机床体积性能的完整测试是一个困难且耗时的过程。对角线位移测试减少了与体积性能测试相关的时间和成本。 对角线位移试验本身不是诊断试验，尽管有时可能从结果中得出诊断性结论。特别是，当包括面对角线测试时，可以直接测量轴的垂直度。 根据ISO 230-2，身体对角线上的对角线位移试验可通过正面对角线上的试验、平行于机器轴的试验或ISO 230-4中定义的三个坐标平面上的轮廓性能评估来补充。 对角线位移试验可用于验收目的，并作为机器性能的保证，其中试验参数用作比较指标。

This part of ISO 230 specifies diagonal displacement tests which allow the estimation of the volumetric performance of a machine tool. Complete testing of the volumetric performance of a machine tool is a difficult and time-consuming process. Diagonal displacement tests reduce the time and cost associated with testing the volumetric performance. A diagonal displacement test is not in itself a diagnostic test, although conclusions of a diagnostic nature may sometimes be possible from the results. In particular, when face diagonal tests are included, a direct measurement of the axes squareness is possible. Diagonal displacement tests on body diagonals may be supplemented by tests in the face diagonals, by tests parallel to the machine axes in accordance with ISO 230-2, or by the evaluation of the contouring performance in the three coordinate planes as defined in ISO 230-4. Diagonal displacement tests may be used for acceptance purposes and as reassurance of machine performance where parameters of the test are used as comparison index.