Section 4 — Measurement Types and their Uses
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3 — Take Cross Channel Spectrum (ODS) Recording
Once you have selected your parameter set you can start taking Cross
Channel Spectrum (ODS) recordings according to the labeled machine
test plan you have created. Your instrument keeps track of the
recordings for each point. However, when you save your recordings you
will need to specify the points and directions you used for these so keep
your test plan close at hand.
To take a Cross Channel Spectrum (ODS) recording:
1. Position your reference sensor at a location on the machine where
there is a strong vibration signal at all frequencies of interest.
Position your roving sensor according to the measurement plan you
drew up.
2. Select the required parameter set listed on the left.
3. Press to start a recording with these parameters.
4. Wait for the sensor to settle — Recording will start automatically.
5. Press or to display the cursor — Use the navigation
arrows to move the cursor to a peak of interest.
TIP: To hide the cursor, Press > Press Clear Cursors.
(Press to display the instrument labels).
6. Press to toggle between displaying:
• Two graphs, one showing data from the reference channel, the
other showing data from your second channel.
• The default view of three graphs showing coherence, FRF, and
Phase data.
7. Press to save the recording.
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