Measurement Computing Medallion Rotate rev.2.3 - Manual (Page 30)

30
Medallion Rotate Manual October 2000
2. From the Analysis menu,
choose RPM from Waterfall.
This displays a color contour
plot of the waterfall.
3. Enter the order you want to use
to find the machine speed. For
this example, leave the value at
1 for the first order.
4. Zoom in on the area around the first order.
5. Working from the bottom of the
plot to the top, click the peaks
for the order. Medallion Rotate
Plus draws a line for the order
by estimating the location of
the order. You can change the
location of the line by clicking
on the plot.
If you want to start over, simply choose Cancel.
6. When the line on the plot connects the peaks for the order, click OK.
Medallion Rotate Plus calculates a smoothed machine speed curve
based on the order number and
the line on the plot.
7. You can select the smoothed
speed curve and the waterfall
data in the Channel List
window, then click the Plot
button to display the Waterfall.
This allows you to use the
order tracking features of the
Waterfall plot.
T
HEORY
The RPM from Waterfall function
uses the assumption that an order of
running speed generates a distinct series of peaks in a Waterfall plot. After you
identify the peaks for the order, Medallion Rotate Plus determines the RPM
versus time function and generates a smooth RPM curve of the instantaneous
speed.