The torsional vibration module doesn't have any pre-set displays, so we need to add them on our own. I have added analog and digital meter for frequency as well as recorder for frequency and rotational angle. On the upper right side, we can see the xy recorder running in a special mode called Angle based x-y. For the x axis, we need to select the Sensor 1 Angle (a reference angle from 0 to 360 degree indicating the current shaft angle) and the rotational angle for the y axis. This xy recorder now displays the rotational angle of the current revolution. It is like a scope, but with an angle reference instead of a time reference.

Rotational vibration measurement

On the lower recorder we can see the natural frequency region around 1800 RPMs. It would be nice to also see the extracted orders of this data. To do this, we need to use the order extraction module.