Measurement Computing eZ-TOMAS rev.11.0 - Manual (Page 37)

Spectral Bands Tab
Up to 10 Spectral Bands can be selected for each dynamic channel. The bands named Overall, DC Gap V,
1x Amplitude and 1x Phase are pre-defined and cannot be modified. However, you can modify “User
Defined” bands 5 through 10, customizing them for your specific application.
Spectral Band values are displayed on the dynamic instrument gauges on the eZ-TOMAS main window.
All gauges are vertical, with exception of circular phase gauges. When “1x Amplitude or 1x Phase is
selected both a vertical gauge [for 1x Amplitude] and circular phase gauge [for 1x Phase] are displayed.
Spectral Bands Tab
Default Tach Refers to the tach channels being used in the project. You must select the tach of
interest.
Channel Name is the name you assigned to the input channel in the Channels Panel.
Band is the Spectral Band Number of interest. Only the “User Defined” bands
[5 through 10] can be modified.
Spectral Band is the name you assign to a spectral band. It is displayed on the dynamic instrument
gauge in the main window.
Freq Units can be either Frequency or Orders. If you do not have a tach defined, the Orders
option will not be available.
Freq LO
Freq HI Used to set the range of the frequency or order. It is a good practice to set the range
2 to 4 spectral lines wider than the frequency of interest. This is due to the FFT
window. For example, if your frequency of interest is the 3
rd order. You should
specify a range of 2.9 to 3.1 orders
CALC Specifies to calculate Peak, Overall, or Phase.
Peak is the highest spectral amplitude within the specified range.
Overall is the sum of vibrations of each spectral amplitude within the specified range.
Phase is the time relationship between the vibration probe and tach signal.
Amp LO
Amp HI Used to set the low and high amplitudes. These high and low values define the gauge
range.
eZ-TOMAS 947394 Edit Menu 4-9