PRÜFTECHNIK VIBXPERT II, Руководство по эксплуатации

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5-13
VIBXPER
T II 05.2012
Starting the measurement and displaying the shaft centerline plot
• Click on the measurement task icon and then on 'Start' (see p. 5-6).
During data collection, the values for the DC component are dis-
played in the measurement data dialog window (see p. 5-7).
• After measurement, press the F key and click on 'Shaft centerline'.
The shaft centerline plot appears (see below).
Static shaft position
By default, the DC component at the smallest rpm defines the static
shaft position in the shaft centerline plot. The static shaft position can
also be set after measurement using other methods:
• Press the MENU key in the results screen.
• Select 'Shaft centerline' and click on 'Get shaft rest position'.
• Select one of the following methods:
- c
urrent
c
ursor
: Cursor position indicates the rest position.
- e
nter manual
: Enter the coordinates for every channel.
- m
easure
: Use the 'Static shaft position' measurement task.
- c
hoose from file
: Import from a 'Static shaft position' result file.
Sensor arrangement
The arrangement of the sensor relative to the direction of rotation in-
fluences the position and orientation of the shaft displacement in the
diagram. Because the direction of the shaft displacement with respect
to the direction of rotation is a characteristic of certain fault types in
journal bearings, the correct sensor arrangement in the diagram is im-
portant. If necessary, the arrangement of the sensors and the direction
of rotation can be mirrored:
• Press the MENU key.
• Select 'Shaft centreline' and click on 'Fit sensor adjustment'.
• In the next window (sensor geometry, at right), click on 'Flip A-B'.
Shaft bearing - does not contain abso-
lute bearing dimensions
Sensor A and B at 90° to each other
Direction of shaft rotation
Shaft centerline displacement during
measurement
rpm at cursor position
Shaft centerline plot
Channel A Channel B
Static shaft position
'Advanced' tab
Mirroring the sensor arrangement
Measurement tasks
Shaft rest position
Methods for reading in the rest position