Manual Chapter 5

6-15
Otherwise, you are warned the data is “Unfit” (less than 85%). At this point
you should either repeat the data acquisition or try to manually condition
or edit the data. This built-in check helps alert you to the data losing reli-
ability in the misalignment calculations. Refer to “Additional Data Detail”
on page 5-34 for more information.
Note
For the greatest accuracy and repeatability, all readings should
be acquired using the same direction of rotation. In addition, it
is best to use the same direction of rotation as the machine nor-
mally operates.
Note
Remember, when shaft movement due to causes other than
misalignment is present in the data this will appear as a ran-
domness (noise) in the data. This is not normally a problem
when the misalignment great, but will increasingly interfere as
the misalignment decreases. Therefore, the better the align-
ment the more likely the chance of seeing the Unfit data
warning.