Acceleration Pickup Frequently Asked Questions

The instruction manual states that the "horizontal sensitivity is 5% or less." When measuring vertical vibrations, the accelerometer should be fixed perpendicular to the vibration surface as shown in the diagram. However, if there are significant horizontal vibrations in this state, it will affect the voltage output of the accelerometer. The manual expresses this impact as horizontal sensitivity, stating it as "no more than 5% of the maximum vertical sensitivity."

For example, in the case of an acceleration pickup that states "vertical sensitivity of less than 5%", if there is a horizontal acceleration of 1m/s ² in addition to vertical vibration, the maximum voltage corresponding to this 5%, or 0.05 m/s ², will be included in the output as an error. If the horizontal vibration is also significant, it is recommended to use a 3-axis acceleration pickup such as the NP-3560B, which can measure horizontal acceleration as well.