4.2.1.动作距离测定；当动作片由正面靠近接近开关的感应面时，使接近开关动作的距离为接近开关的动作距离，测得的数据应在产品的参数范围内。 EX-22B/EX-24A/EX-24B/EX-26A/EX-26B/EX-28A/EX-28B/ EX-15E/EX-17E//EX-11A（EX-11AD/EX-22B/EX-24A/EX-24B/EX-26A/EX-26B/EX-28A/EX-28B/ EX-15E/EX-17E//EX-11A（EX-11AD/
4.2.2.释放距离的测定；当动作片由正面离开接近开关的感应面，开关由动作转为释放时，测定动作片离开感应面的距离。
4.2.3.回差H的测定；动作距离和释放距离之差的绝对值。
EX-22B/EX-24A/EX-24B/EX-26A/EX-26B/EX-28A/EX-28B/ EX-15E/EX-17E//EX-11A（EX-11AD/EX-22B/EX-24A/EX-24B/EX-26A/EX-26B/EX-28A/EX-28B/ EX-15E/EX-17E//EX-11A（EX-11AD/EX-22B/EX-24A/EX-24B/EX-26A/EX-26B/EX-28A/EX-28B/ EX-15E/EX-17E//EX-11A（EX-11AD/EX-22B/EX-24A/EX-24B/EX-26A/EX-26B/EX-28A/EX-28B/ EX-15E/EX-17E//EX-11A（EX-11AD/4.2.4.动作频率测定；用调速电机带动胶木圆盘，在圆盘上固定若干钢片，调整开关感应面和动作片间的距离，约为开关动作距离的80%左右，转动圆盘，依次使动作片靠近接近开关，在圆盘主轴上装有测速装置，开关输出信号经整形，接至数字频率计。此时启动电机，逐步提高转速，在转速与动作片的乘积与频率计数相等的条件下，可由频率计直接读出开关的动作频率