Measurement Computing eZ-TOMAS version 7.1.x - Manual (Page 41)

eZ-TOMAS & eZ-TOMAS Remote 887591 Edit Menu 3-15
Input Channels Panel
Selected channels have green backgrounds. Non-selected channels appear with white backgrounds.
Selected channels are listed by channel number and name. The channel name is the one that is
assigned in the Input Channels tab of the Edit menu’s Setup Configuration window, under the
“Name” column.
Spectral Bands Panel
Band
(A thru N) is the Spectral Band of interest. Only the “User Defined” bands [E through N] 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. A, B, C, and D are pre-defined.
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, Phase, or Unused.
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.
Unused
Amp LO
Amp HI
does not calculate a value for the spectral band.
Used to set the low and high amplitudes. These high and low values define the gauge
range.
The lower potion of the Spectral Bands Window consists of a Spectral Band Toolkit panel. The toolkit
includes a field to enter machine speed in RPM, selection for 50 or 60 Hz line frequency, and selection
for a band scale in Hz or Orders. Aside from these, the toolkit includes 5 tabs: Bearing Faults, Motors,
Gears, Pumps / Fans, and Belts.
Spectral Band Toolkit Panel
Nominal
Machine Speed
(RPM) Enter the machine’s nominal running speed.
Line Frequency Select 60 Hz or 50 Hz, depending on the frequency of the power supply.
Band Scale Choose Hz or Orders.
Examples from the toolkit tabs follow.