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

Signal settings for VC and Nano lines

 
This panel shows the relevant settings for the measuring channel. They are identical for VC and Nano lines.
 
Signal settings for VC and Nano lines
1

Channels

1. Channels
Signal conditioning can be set for each channel individually. VM-OCT can display different characteristics for one sensor.
 
The number of tabs depends on the entered channel number. The channel color can be changed by right mouse click.
 
2

Signal input

2. Signal input
Selects the used M302/M312 device and the inputs with connected accelerometers.
The gain setting determines the measuring range.
 
 
3

Measurand and unit

3. Measurand and unit
For the measurement of VC and Nano lines vibration velocity in ┬Ám/s is the relevant measurand.
It is preset and cannot be changed.
 
4

Characteristic value

4. Characteristic value
 
The diagram can display RMS and peak values simultaneously. Peak values are indicated in brighter color on top of the RMS bars.
The following calculation modes are available:
 
RMS  (calculated for the entered time window), relevant for measurements according to VDI 2038-2.
... with rectangular time window
Displays the mean value during the past sliding time window
... with exponential time window
Higher mean values are indicated immediately and decay with the entered time
Peak value (measured during the entered time window)
off
No peak display
... with rectangular time window
Displays the peak value during the past sliding time window
... with exponential time window
Higher peak values are indicated immediately and decay with the entered time
Peak hold
Maximum peak value since start of VM-OCT
 
5

Time window

 
5. Time window
Time window for RMS and peak calculation, 0.1 to 100 s