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4)
Click the
Vibration
tab and the Vibration Trace screen is displayed.
The gridded area of the display on the right shows the traces. When the AMS is turned on and has a
connection to the computer running MultiView, the AMS transmits vibration data in nearly real time.
5)
Give the AMS a light tap. A spike in the traces will appear at the far right of the MultiView screen. New
readings always appear at the far right edge of the display. As more readings are displayed, the spike scrolls to
the left and eventually disappears. The trace area of the display is described below.
•
X, Y, and Z Axes
These traces show the vibration measured in each of three directions. Looking down on the AMS with the logo
at the top, the X trace shows horizontal movement to left and right, the Y trace shows horizontal movement to
top and bottom, and the Z trace shows vertical movement.
The AMS measures vibration in units of g-force, which is actually a measure of acceleration. One g is the
acceleration of gravity (approximately 32 ft/s
2
9.81 m/s
2
), with a range from -2 g to +2 g. The number
displayed below the label (X, Y, or Z) at the far right of the screen is the current value: the value displayed at
that instant at the far right of edge of the trace. The default vertical scale shows units of g-force, but you can
change the units to galileos (1 Gal = 0.01 m/s
2
). You can also change from displaying acceleration to displaying
the signal energy (g
2
-s). To change the displayed readings and scales, see
Changing the Time-Domain Format
on page
