5-17
Measurement tasks
The signals of both sensors are displayed either as individual
signals or as an orbit in a polar chart. The maximum and minimum
phase vectors and the order filter are displayed in the data field on
the orbit display. The angular coordinate of the cursor indicates the
angular distance to Keyphaser point*, which is marked in the orbit
with an arrow. To check the phase stability, multiple rotations of the
shaft can be displayed in the orbit diagram (see p. 3-23).
Cursor and Zoom
A main and delta cursor are available for evaluation. Details of their
function and operation are described in the section 'Evaluating
results - Time waveform' on page 4-5. The Zoom function is
controlled with the '+/-' key or with the navigation keys ('Phase
measurement', P. 5-15)
Changing the diagram type
After the measurement,
• Press the F key, and click on 'Individual signals' or on 'Orbit'
respectively, or..
• Open the Display Setup and select the diagram type (see below).
Changing the order filter
After measurement, press the F key, and select the required order in
the 'Order' field. The order of '0' corresponds to the unfiltered signal
and can only be adjusted if the measurement parameters in the
measurement setup and the transducer setup are the same.
Orbit, unfiltered
If a keyphaser is not available, record an 'unfiltered' orbit. The
angular displacement of the sensors for this measurement task must
equal 90°! To stop the measurement, press the 'Enter' key.
For time-based average enter the shaft RPM value and the
number of rotations, if necessary: Press the MENU key and select
'Postprocessing / Timesynchronous average' (see also p. 4-7).
Left:
Change diagram type
Right:
Change order
* Keyphaser point: Point in the orbit, at
which the reference mark on the shaft
passes the Keyphaser.
Summary of Contents for VIB 5.310
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