Atlas Copco PowerMACS 4000, User Manual

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Basic Functions
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If there is a subgroup, which has possible corrupt data, you can delete it. Click in the diagram on the
subgroup you want to delete. Press
Delete Subgroup . This is possible only when the selection SPC and
TDA is active.
To the left current capability values are displayed. The window is automatically updated whenever a new
cycle is completed. Values displayed are calculated over same data as shown in the curve, for subgroups
or for short-term trend.
If Cp or Cpk is not presently within limits, a warning message is presented.
If you select Histogram you will be presented the following view:
This form displays the frequency distribution of the selected variable. The X-axis, displayed in the unit of
the variable, is divided in 20 classes scaled so that 25% of the screen is left of LTL, and 25% is right of
UTL.
The boundaries of each class are marked using dashed vertical lines where green indicates classes in
between LTL and UTL.
On Y-axis is shown the count of values with in each of the classes.
If you want to have the current view on paper, press Print .
The viewed statistics is updated cyclically when online.