CEMB USA N500 - Manual (Page 28)

5 - 4 Vibrometer mode
10. amplification status of the channel
N.B.
The values obtained in this mode can be reused to evaluate the operating status of
the instrument by using, for example, the tables and graphs given in Appendix B
of this manual.
The default measurement is that of the total vibration value, but by pressing it is
possible to switch to measurement of the synchronous value: in this mode, information
appears concerning the modulus, phase and speed of rotation. Pressing of
allows
return to measurement of the overall. value. N.B. To perform a synchronous measurement,
it is necessary to connect the photocell and make sure that it is positioned correctly (see
Speed monitoring 5-6).
Direct printing of the vibration value (optional).
By connecting the portable printer supplied (optional) then pressing
it is possible
to print directly in field the vibration values displayed in the VIBROMETER PAGE
Monitoring in time
The monitoring in time function allows observing (and memorizing if necessary) of the
trend of the overall vibration value plotted against time. For such purpose, it is necessary to
preset a value which is adequate for the parameter by selecting from the following
possibilities:
–
1'' - one second
–
10'' - ten seconds
–
1' - one minute
–
15' – fifteen minutes
After pressing a measurement is made of the overall value, indicated by a
point on the graph; such measurement is automatically repeated according to the preset
time step, and a new point is represented in the graph. Availability of a new measurement is
signalled by momentarily displaying the time step in white on black background
(under the icon with metronome ).
When the number of measurements made exceeds forty, just the most recent forty
measurements are shown in the graph.
Monitoring is stopped by a further pressing of and the typical control
functions of the graphs become available (see 2-5 Functions operating on the graphs).
- Set scale (with which it is also possible display all the measurements made)
- Show cursor
-
Change of channel displayed
- List of peaks