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


In acoustic mode a frequency dependent limit line can be entered. It helps to identify critical values visually and is also usable for triggering alarm messages.
Free adjustable limit line in Acoustic mode
Linear intervals can be entered. Interruptions are allowed.
Fixed limit lines for the modes VC lines and Nano lines
Perception limit, VC criteria (VC-A  ... VC-G) and Nano criteria (Nano D, Nano E and Nano EF) to VDI 2038-2 are available. VC-OCT measures the RMS of vibration.


1. Channel
Limit lines can be entered for each channel.

Limit line on/off

2. Limit line on/off
Switch the limit curve on or off

Table with limit line values

3. Table with limit line values
The table includes the corner points of the limit line. Only the "From" value can be edited. Limit values can also be changed by the mouse pointer in the diagram. The "To" value is taken from the next point.
The checkboxes select whether the line section is drawn or not. If it is unchecked the line will be interrupted.
Right click in a line allows to delete the point.

Announce exceedance

4. Announce exceedance
If activated annunciators are triggered when the limit line is exceeded.

Add a new point

5. Add a new point
Adds a new point to the table. The new point inherits the coordinates of the previous line.

Save limit line

6. Save limit line
Save a limit line to a file.

Load limit line

7. Load limit line
Load a limit line from a file.