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E
Vibration measurement
E:21
Making HD ENV assignments
HD ENV is an ideal complement to conventional vibration
techniques. Capable of detecting at a very early stage such
machine problems which are generally difficult to find in
good time with non-enveloping techniques, for example
bearing damages and gear damage, the method utilizes
cleverly engineered algorithms for digital signal processing
to obtain optimal data for trending purposes.
To follow an impact related damage throughout its
development in all stages, from initial crack to loose parts
and spalling, it is recommended to set up three vibration
measuring assignments:
• one HD ENV assignment with filter 4 for detection of
early faults
• one HD ENV assignment with filter 3 for detection of
more developed faults
• one velocity vibration assignment for detection of far
advanced faults
A proper measuring point for HD ENV has to be made in
Condmaster and downloaded to Leonova. However, it is
possible to open the ‘HD ENV’ default file in the Vibration
window (1) and configurate all measuring parameters.
You can rename the file with a descriptive name. Mark the
vibration default file (1) with the LEFT/RIGHT arrow keys.
Press SHIFT+F2 and select ‘Rename’ (2). Input as name via
the keyboard window and save with ENTER. The new name
will show up in the measurement window. The default file
(1) will have the new name after restarting the instrument.
Select the ‘HD ENV’ default file (1) and press ENTER to
open.
Press SHIFT+F3 to open ‘Measuring point data’.
Before starting vibration measurements, make sure that
the vibration transducer you are using with your Leonova is
properly selected.
Default transducer
Default vibration transducers for the vibration techniques
are set up via the transducer register. Default transducer
is the active transducer when ‘Portable’ transducer is
selected under ‘Measuring point data’. To select a default
transducer, see Chapter A page 15.
1
2
3
The transducer data become editable after you switch ‘Transducer’ (3) from ‘Portable’ to ‘Remote’.
Provided you know the transducer’s frequency range and its upper and lower bias range, you can
input the data here.
The actual sensitivity of the individual transducer is written on its calibration card. This data should
always be input in the transducer register. When several transducers are in use, they should be
marked to assure that the readings are calibrated.