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

Overall values

For overall vibration values VM-REC measures analog input signals from the USB devices.
Overall values

Signal input

1. Signal input
Selects the physical input and the gain of the USB device.


2. Filter
Here you adjust the frequency range of the displayed value fmin to fmax.

Measurand and unit

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


4. Characteristic
The following options are available:
Instantaneous value
Shows the current value of the switching signal
4 peak values:
Positive, negative, absolute, peak-to-peak
True RMS:
Root mean square value
Main frequency:
Frequency with the highest magnitude
Mono harmonic:
Total harmonic distortion, deviation from pure sine-wave
Crest factor:
Ratio of absolute peak and RMS

Time window

5. Time window
Time interval for calculating the characteristic value.