Limitations of Using DAQ Cards for Absolute Vibration Measurement in Hydraulic Machines

Vibration measurements are a frequently used tool in technical issues. They are widely used in operation and for testing irregularities in the operation of machines and devices, including hydraulic machines (turbines, pumps, and pump turbines). This article considers the possibility of using measurement cards to measure the absolute vibrations of hydraulic machines. Basic information related to vibrations and their measurement, as well as requirements specified in standards related to vibrations of hydraulic machines, are presented. Then, six measurement cards are tested, and the possibility of their use in vibration measurements of hydraulic machines using accelerometers is analyzed.