Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
PC Vibration Measurement System VibroMetra

Signal

 
This control tab offers settings for the signal to be measured.
 
Signal
1

Channel

 
1. Channel
VM-FFT 3D is a one-channel analysis tool. If more channels shall be viewed simultaneously, the instrument can to be cloned.
By right-clicking on the channel, its color in the diagram can be adjusted (Change color).
2

Signal input

 
2. Signal input
Signal source selects the physical input for the vibration signal. Gain is used for the manual range selection.
3

Measurand and unit

 
3. Measurand and unit
 
The connected sensor determines the available options. Velocity and displacement are calculated from acceleration by integration (VM-FFT 3D+ only). The unit should be selected in a way that the measuring value does not drop below 0.001 permanently.
4

Characteristic

 
4. Characteristic
 
The following characteristics are available:
Peak value:
The height of the FFT line represents the amplitude of the corresponding sinusoidal signal.
Peak-to-peak value:
The height of the FFT line represents the peak-to-peak amplitude of the corresponding sinusoidal signal.
True RMS value:
The ehight of the FFT line represents the true RMS value of the corresponding sinusoidal signal.