How to measure vibrations with WinMLS?

Vibrational measurements can be performed with WinMLS.

 

To find the levels in one-third octave bands, go to Setup->Load… and select the setup Level (noise)_Leq (dBA, dBC, etc. ,third oct. bands). You can also load a suitable setup in the General section if you want to do other types of measurements..

 

If you want to measure the absolute values, you need to calibrate the input. Click the  button on the Standard Toolbar to open the calibration dialog as shown below.

 

 

In section 1b. above, select the type of transducer. Follow the sections below for detailed information about the calibration procedures, or click the  button in the dialog box.

 

Note: When plotting these quantities in the frequency domain, a reference is used. The most known reference is 20 microPa which is used to determine SPL (94 dBSPL equals 1 Pascal). There are standards for such references, e.g., ISO 1683. The references we are using are as follows:

Displacement: no reference is used and the data is plotted as RMS meters.

Velocity: The reference is 10-9 m/s and the quantity is named Lv.

Acceleration: The reference is 10-6 m/s2 and the quantity is named La.

Force: The reference is 10-6 Newton and the quantity is named Lf.

 

More:

Measuring with an accelerometer or a velocity/displacement measuring device

Measuring with a force hammer