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

Signal settings

Signal settings

Band pass filter

1. Band pass filter
The vibrations caused by damages on bearings occur at high frequencies. Low frequency effects, e.g. unbalance, are suppressed. The first value of the bandpass filter is a high pass value which suppresses these low frequency parts.
The upper band limit allows for instance to suppress the resonant frequency of the sensor. However, it is often taken into consideration because the sensor is particularly sensitive to bearing damages at this frequency.

Type of enveloping

2. Type of enveloping
The type of enveloping can be selected. The fast enveloping is performed with rectification. The precise enveloping uses a Hilbert transform and estimates more computing capacity.

Source for rotation speed

3. Source for rotation speed
For allocating damage characteristics, it is essential to know the exact rotational frequency.
  • It is especially comfortable to use an rpm sensor, which moves the damage markers in real-time. Select the option Measurement if you use such an rpm sensor.
  • If the rotation speed is known and constant, you can do without measuring the rotational frequency. In this case, it is possible to enter the rotation speed manually.