Measurement Computing eZ-TOMAS rev.11.0 - Manual (Page 67)

Waterfall Displays
Data Source
History File
Waterfall
Display
Display
Cursor
Values RPM
Annotation
Peak Cursor
Update Spectral Bands
(1, 3, 5, 7 shown selected)
Waterfall Display
Waterfall Displays show a series of Spectrums on a 3D graph. The X Axis is Frequency either Hz or CPM. The Y Axis is
Vibration Amplitude. And the Z Axis is time. The following factors apply to this figure.
Spectral Bands 1, 3, 5, and 7 are overlaid.
"1" is the spectrum for the current historical record pointer, "3" is the first order
(1x) amplitude, "5" and "7" are the user defined spectral bands. (2x and 4x respectively)
Selected History Range is selected and a Skip Record Factor (SRF) is automatically determined to show the entire selected
history range. In this example, the requested history range includes 634 records, the Waterfall displays 100 records. In this
example
SRF = History Records / (Waterfall Records - 1) = 634 / 99 = 6.4 records.
Cursor Value and Peak Cursor Update options are selected. The cursor with annotation will be placed on the highest
amplitude value on the current spectrum.
RPM annotation is selected. RPM values are shown on the right side of the waterfall display. 10 annotation labels are
supported.
Note A: To adjust the Latitude Angle (Vertical Pitch) of the Waterfall display, Right Click in the Y-axis area and enter a
value between 0 and +75 degrees. This is indicated in the upper left corner of the display (see figure). Unless you
right-click in the Y-axis region, this feature will remain hidden.
Note B : To adjust the Longitude Angle (Horizontal Pitch) of the Waterfall display, Right Click in the X-axis area and enter a
value between -75 and +75 degrees. This is indicated in the lower right corner of the display (see figure). Unless
you right-click in the X-axis region, this feature will remain hidden.
eZ-TOMAS 937594 Display Menu … Plots Plot Examples 7-5