SPM leonova emerald, Руководство пользователя

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B:38
General measurement functions
B
HD Order tracking is an optional Leonova function
primarily used for SPM HD and vibration
analysis on
variable speed machines.
The method uses multiples of rotational speed (orders),
rather than absolute frequency (Hz). The number of
orders to be shown is input by the user. Leonova will
then automatically set the sampling frequency to an
exact multiple of the measured rpm. Order tracking
will also minimise the risk of smearing when using
FFT averaging.
The purpose of using orders is to lock the display to
the rotational speed (1X) and its multiples, which means
that the ordered components in the spectrum always
remain in the same position in the display, even if the
rotational speed varies between the measurements.
Two or several spectra from the same machine with
variable speed can therefore more easily be compared
if they are expressed in orders. Using order tracking,
the frequency range will always cover the symptoms
of interest, regardless of the rotational speed of the
machine.
To activate Order Tracking, go to MENU in the
measurement window > ‘Measuring point data’ (1)
and select ‘Order tracking’ (2). Press ENTER to mark
the ‘Order tracking’ checkbox (3). Enter the desired
number of orders (4) and press F1 to save and BACK
to return to the measurement window.
The lower frequency is input in Hz or CPM under
‘Measuring point data’. The upper frequency is shown
in orders. ‘Variable speed’ must be marked and rpm
has to be measured.
Other graphical functions and settings are the same as
for spectrum, see ‘Spectrum functions’ earlier in this
chapter of the manual.
Setup of order tracking assignments in Condmas-
ter requires one of the following optional software
modules:
• MOD134 (FFT with symptoms)
• MOD135 (EVAM)
• MOD193 (Vibration Expert)
• MOD197 (Vibration Supreme)
• MOD195 (SPM HD Expert)
• MOD140 (HD Analysis)
HD Order Tracking
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