Variable speed
The alternative ‘Variable speed’ implies that the shock pulse
measurement is preceded by a measurement of the rpm.
The NORM no. will be shown in the measurement window
after the speed measurement.
Measure RPM simultaneously
‘Measure RPM simultaneously’ (8) is normally not used. With
this setting on, you are forced to first measure the rpm again
before you can repeat the shock pulse measurement.
ACCUM (accumulation) is set to 3 or higher on low speed
bearings (rpm < 600) and in all cases where extra accuracy
is required. Leonova will measure as many times as stated
here and then return an average value.
COMP means compensation number, see page D:26. This
number, if used at all, can first be set after studying the
measuring result in Condmaster.
To calculate a new COMP number, select COMP, press Edit (F1) and select “Calculate on next reading”.
Perform a new measurement. When saving, both the new and the old number is displayed. When
transferring to Condmaster you have the option to accept the new or retain the previous COMP number.
RPM Trigger
When measuring on variable speed machines, an ‘RPM trigger’ can be used to determine when to
start a measurement, ensuring that it is carried out at an appropriate speed. The RPM trigger can be
used on applications where useful readings can be obtained only within a limited RPM range, such
as in cranes.
‘RPM trigger’ (9) can be set to ‘RPM run up’ or ‘RPM run down’. ‘RPM run up’ means Leonova will
initiate the measurement, then wait for the machine to speed up to the level input under ‘Trigger level’
before it starts recording the signals. With ‘RPM run down’, Leonova waits for RPM to slow down to
the ‘Trigger level’ setting.
Under ‘Delay time’, you can specify a number of seconds during which Leonova will delay the start of
measurement. This setting is optional.
SPM Spectrum
An SPM spectrum measurement can be carried out along with the LR/HR measurement. It is measured
in addition to the ordinary shock values.
Mark the ‘SPM Spectrum’ row (10). Press ENTER and set ‘SPM Spectrum’ to ‘Yes’. Settings for SPM
Spectrum are described on page D:33.
LR/HR HD
The LR/HR technique takes advantages from the SPM HD technique provided that both techniques
are active in the Leonova. The LR/HR HD technique utilizes the SPM HD algorithms for time signals
and spectrums. Input data for the FFT calculation is the same as for SPM HD.
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