Svantek SVAN 948, User Manual

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SVAN 948 USER MANUAL
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measurement performed in the free field conditions. In order to make the measurements in the diffuse
field conditions the user has to switch on an additional correcting filter. The frequency characteristic of this
filter is given in App. D. The
FREE option selection means that the correcting filter for the diffuse field
conditions is switched off. For the measurements performed with the use of the microphones for the
diffuse field conditions the option
DIFFUSE should never be used.
The view of the displays in the
SETUP
list
(path: MENU / SETUP)
, the FIELD CORRECTION text highlighted
(displayed inversely) and the available options of the FIELD CORRECTION filter
The REFERENCE LEVEL sub-list enables the user to set the reference level of the vibration signal.
The values which are set here are taken into account during the calculations of the measurement results
expressed in the logarithmic scale (with the dB as the units) in the case of acceleration, velocity and
displacement (vibration measurement). In the case of sound measurements the
REFERENCE LEVEL
sub-lists is used only to inform the user that the reference level of the acoustic signal is equal to 20
µ
Pa.
a) b)
The view of the display in the
SETUP
list
(path: MENU / SETUP / REFERENCE LEVELS / VIBRATION or SOUND)
and the setting of the REFERENCE LEVELS in the case of vibration measurement (a) and in the case of
sound measurement (b)
The VIBRATION UNITS position enables the user to select the units for the vibration
measurements. It is possible to select the METRIC units (e.g. m/s
2
, m/s , m etc.) or NON-METRIC units
(e.g. g , ips , mil etc.).
The view of the display in the
SETUP
list
(path: MENU / SETUP)
and the VIBRATION UNITS settings