BRUEL & KJAER VIBROPORT 80 - 9 Setup Parameters for the Measuring Modules; General; Important Notes on the Modules; Vibration Acceleration and Vibration Displacement Measurements

Translation of the Original Operating Instructions
VP-80/VP-80 E
98
9 Setup Parameters for the Measuring Modules
9.1 General
The following tables will help you to understand and set the
options and setup parameters for the individual modules.
A setting option and an explanation are provided for each pa-
rameter. The setup parameters are called up in the modules
with the SETUP softkey or with the fire key.
9.2 Important notes on the modules
9.2.1 Vibration acceleration and vibration displacement measurements
In the case of an acceleration measurement and subsequent
single integration of the measuring signal for vibration velocity
or double integration for vibration displacement, the signal to
noise ratio must be noted if parameter settings are selected in
the setup with high-pass filter limit frequencies below 10 Hz.
In these cases, the background noise of the device together
with the noise components of the measuring chain can e.g.
result in vibration displacements, which are in an order of ma-
gnitude of roughly 50 to 100 μm or more. Moreover, this beha-
vior occurs increasingly the lower the high-pass filter limit
frequency selected. In order to obtain reliable measuring valu-
es, an adequately high signal to noise ratio should be provi-
ded for the application.
i
Note!
The settings described in the following are also based on the
System Setup and the Sensor Setup.
i
Note!
Parameters which can be seen as standard are shown in
bold in the table. The EXPAND function key has not yet been
activated here.
All other parameters are listed directly afterwards. These
depend on the specific setting.
The EXPAND function key has already been activated here.