Svantek SVAN 948, User Manual

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SVAN 948 USER MANUAL
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The window is closed and the instrument returns to the
SETUP
list after pressing any push-button
with an exception of the <SHIFT> one.
Selection of detector’s type in the LEQ (RMS) calculations - RMS INTEGRATION
The RMS INTEGRATION
(path: MENU / SETUP / RMS INTEGRATION)
position enables the user to
select the detector type for the calculations of the LEQ function (in the case of sound measurements) or
the RMS function (in the case of vibration measurements). In order to enter this position the user has to
select the RMS INTEGRATION text in the SETUP list, using the < > , < > (or < > , < > ) push-buttons
and press the <ENTER> .
The view of the display in the
SETUP
list with the RMS INTEGRATION text highlighted (displayed
inversely)
Two options are available: LINEAR and EXPONENTIAL . The required parameter can be selected
by means of the < > , < > push-buttons. The position is closed and the instrument returns to the
SETUP list after pressing the <ENTER> (with the confirmation of a change made in the position) or the
<ESC> push-button (ignoring a change made in the position).
The expressions used for the LEQ or RMS calculations are given in Appendix D. Setting LINEAR is
required for the IEC 61672-1 standard (for getting the true RMS value of the measured signal). When this
option is selected in the case of sound measurements, the value of the
LEQ and SEL function (the SLM
case) does not depend on the detector time constant (the results are displayed without the indicator of
the detectors selected in the profiles).
The view of the displays with the available options of the RMS INTEGRATION position
Setting EXPONENTIAL enables the user to fulfil the requirements of the IEC 804 standard for the
LEQ measurements. When this option is selected in the case of sound measurements, the value of the
LEQ and SEL function (the SLM case) depends on the detector time constant (the results are displayed
with the indicator of the detectors selected in the profiles).
In the case of sound measurements, setting EXPONENTIAL enables the user to fulfil the
requirements of the IEC 804 standard for the RMS measurements. When this option is selected the value
of the function depends on the detector time constant (the results are displayed with the indicator of the
detectors selected in the profiles).
Setting the reference signal in vibration measurements - REFERENCE LEVEL
The REFERENCE LEVEL
(path: MENU / SETUP / REFERENCE LEVEL)
sub-list enables the user to
set the reference level of the signal in vibration or sound measurements. The values which are set here