26
In the time signal, the analog electrical output from
the sensor is digitized, showing how vibration changes
over time. The time domain signal can be a useful
complement to spectrum analysis to reveal valuable
additional information on machine condition, especially
for troubleshooting of gearboxes and low-speed ap-
plications (<100 RPM).
Time signal display
To view a time signal:
1. In the Measurement display (A), press the RIGHT
arrow key.
2. In the display shown next (B), use the UP/DOWN
arrow keys to highlight the ‘Time signal’ checkbox
and press ENTER.
The Time signal display (C) shows time samples of the
raw vibration signal. The length of the time signal in
milliseconds is determined by the resolution selected
under Spectrum settings (for more information, see
the ‘Spectrum resolution settings’ section):
200 lines = 200 ms
400 lines = 400 ms
800 lines = 800 ms
The time signal is zoomable; see below.
Zoom
The zoom functionality works as follows:
- To zoom in, use the UP arrow key. Please be obser-
vant that the Y scale will change, adapting to the
zoomed-in view.
- To zoom out, use the DOWN arrow key.
- To move the zoom window along the X axis, use the
LEFT/RIGHT arrow keys.
T1 and T2 indicate the start and end positions of the
the time signal portion currently shown in the display,
and a red marker indicates the approximate center
position and its amplitude.
To return to the Measurement display, press the BACK
key twice.
Time signal analysis
A
B
C
End position
Start position
Zoom in
Zoom out
Move
right
Move
left
To Next Page
Loading...
