5-30
Measurement tasks
DC measurements
For the following measurement tasks, the DC component in the
signal can be recorded in addition:
- Time waveform with the measuring quantity set to vibration
displacement or user-defined*.
- Spectrum with the measuring quantity set to vibration
displacement or user-defined*.
- Phase with the vibration displacement measuring quantity .
- Coastdown, amplitude/phase with the measuring quantity set to
vibration displacement or user-defined*.
- Orbit (unfiltered), with the measuring quantity set to vibration
displacement or user-defined*.
- Time waveform recorder, with vibration displacement measuring
quantity.
Application examples
The DC component in the
time waveform
can be evaluated when
process parameters or distances are measured.
When a
2-channel coastdown curve
is measured with the
vibration displacement
measuring quantity, the shaft centerline
plot during runup or coastdown in a machine with journal bearings
can be calculated from the DC component of the signal (see p.
5-12).
Setting up a measurement task for measuring the DC components
You can activate a DC measurement in the measurement setup
using the 'Lower frequency = DC' parameter (see p. 3-21 / 3-23).
You must also set up the 'Vibration displacement' or 'User-defined'
measuring quantity and assign a suitable sensor.
Setting up a DC measurement
Measuring quantity = 'Displacement'
or 'User'
Lower frequency = 'DC'
* see page 5-19
Summary of Contents for VIB 5.310
Page 1: ...Data Collector Vibration Analyzer VIBXPERT II Users Manual ...
Page 9: ...1 8 Empty page ...
Page 51: ...2 38 Empty page ...