User's Manual

Collect data until the magnitude is stable and phase varies by no more than 5
degrees in the Data Stability graph.
9.
Press Accept Data to save the data.
If you selected Auto for the mux option, the Balance program automatically accepts
the data and moves to the next point when the phase and magnitude are good for 3
consecutive averages. See Section 9.4.5.
10. Repeat steps 5-9 for all measurement points at each speed, if you set up more than
one speed.
11. Repeat all steps in this procedure for each trial run, if you set up more than one trial
run.
12. Press Next Step when you have collected data for all trial runs.
13. Press Enter to remove the trial weights, or press Back to keep the trial weights.
After you complete all trial runs, an X appears next to the trial run measurement on
the Acquire Data screen.
Watchdog checks to validate trial run data
After you acquire the last trial run measurement, the Watchdog application checks the
data for any potential problems using the criteria below. If a problem exists, a message
displays.
1xRPM end-to-end phase difference is less than 100 degrees
On a two-bearing, two weight-plane system, if the phase of the trial weight vector on the
first bearing is not at least 100 degrees from the trial weight vector on the second bearing,
the rotor pivot point is not between the bearings. You may be unable to complete a two-
plane balance. If balancing does not resolve the 1xRPM vibration, do a single-plane balance
instead of a two-plane balance.
1xRPM end-to-end phase difference is greater than or equal to 100 degrees
On a two-bearing, single weight-plane system, if the phase of the trial weight vector on the
first bearing is 100 or more degrees from the trial weight vector on the second bearing,
the pivot point of the rotor is between the bearings. You may be unable to complete a
single-plane balance. If balancing does not resolve the 1xRPM vibration, do a two-plane
balance instead of a single-plane balance.
9.7.5 Redo a measurement
1. From the Acquire Data screen, select a measurement.
For trial runs, press Enter on the Enter Trial Weights screen to display the Select
Measurement Point screen.
2. Use the up and down arrow keys to select the measurement point.
3. Press Enter or Start Data Acq.
Balance
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DRAFT