Note
Cross Channel Phase is not available on the single-channel analyzer.
Issue Sensor location
Misalignment Measure across a coupling.
Looseness/weakness Measure across mechanical interface.
Coherence One sensor on each machine.
Procedure
1.
Create a job.
2. From the Analyze main menu, press F1 Manual Analyze > F1 Set Analyze Mode.
3. Use the up and down arrow keys to select Cross Channel Phase.
4. Press Enter.
The Analyze Setup screen appears.
5. Set the following options as necessary.
Option Description
F2 Set Spectra
Params
Set the Fmax, Fmin, and lines of resolution. See Section 6.7.1 and
Section 6.7.2.
F3 Set Freq In Single Frequency mode, enter a value between 0 and 80,000 to set the
phase frequency to calculate the cross channel phase and coherence. This
option appears in Single Frequency mode only. The default is 60 Hz.
F3 Set Average
Count
In Full Spectrum mode, enter a value between 0 and 10,000 to set the
number of averages to collect. Enter 0 to collect data until you press Stop.
This option appears in Full Spectrum mode only. The default is 1.
F4 Set Window In Full Spectrum mode, select either the Hanning or Uniform window. See
Section 6.7.3. This option appears in Full Spectrum mode only. The default is
Hanning.
F5 Set Mode Single Frequency calculates the cross power phase relationship between the
channels at a frequency, and calculates a coherence value for this
relationship. In Full Spectrum mode, two or four channel spectral data is
collected with a specified number of averages and plots the phase,
coherence, as well as the spectral data for each channel. The default is Full
Spectrum.
F7 Tach Setup Set up the tachometer parameters. See Section 6.6.1.
F11 Ref Input Select the input to use as your reference. If you disable the reference input
from the Input Setup screen, "???" appears until you press F11 Ref Input.
F12 Input Setup Set up the input channels, the sensor type, and the units for the
acquisition type.
6. Press Enter to collect the data.
Analyze and Advanced Analyze
MHM-97432 Rev 7 151
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