The special requirement for the inspekt table 20 kN compression testing machine ordered is that cardboard boxes yield or buckle during the compression test. This causes bending forces to act on the compression surfaces and the load cell, which can damage them. To prevent lateral forces from being transferred to the pressure plate or the load cell, the upper pressure plate of the testing machine is mounted so that it can be tilted. In addition, an electrical switch-off device, consisting of 4 limit switches, monitors the angle of inclination. As soon as the inclination exceeds a critical value, the test is stopped.