SVAN 948 USER MANUAL .
4 - 2
• In the case of the presentation of 1/1 OCTAVE or 1/3 OCTAVE statistical analysis results (see
above for the acoustic signal), pressing the <SHIFT> and <
> or <SHIFT> and <
> push-
buttons enables the user to present the results of the analysis for different 1/1 OCTAVE or
1/3 OCTAVE filters. Pressing the <
>, <
> push-buttons results in the changing of the cursor
position for which the value of LN is displayed.
The acoustic measurement channel consists of the instrument, the preamplifier SV 12L and the
microphone SV 22. These channels are factory calibrated and prepared for the work in the standard
environmental conditions. The calibration of the measurement channels has to be done when the absolute
sound pressure level value is important. It is because the microphone sensitivity is a function of the
temperature, ambient pressure and humidity. The calibration procedure is described in Chapter 4.1.
The vibration measurement channel consists of the instrument and a transducer (e.g. Dytran
3143M1 IEPE type with the nominal sensitivity 10 mV / ms
-2
). This channel is factory calibrated and
prepared for the work in the standard environmental conditions. The calibration of the measurement
channel has to be done in non-standard conditions. It is because the transducer sensitivity is a function of
the temperature, ambient pressure and humidity. The calibration procedure is described in Chapter 4.1.
The main function of the instrument is the measurement of sound level (in the case of acoustic
signal) and the measurement of vibration level (in the case of vibration signal). 1/1 OCTAVE or
1/3 OCTAVE analysis, narrow-band frequency analysis (FFT) etc., are the optional functions, which
broaden the applications of the instrument. They can be supported by the producer or purchased later.
The producer activates the optional functions bought with the instrument. The user should activate by itself
the functions purchased later.
The detailed description of
• the calibration procedure is given in Chapter 4.1,
• the measurement of signal’s level is described in Chapter 4.2,
• The way, in which this activation is performed, is presented in Chapter 4.3,
• 1/1 OCTAVE analysis is given in Chapter 4.4,
• 1/3 OCTAVE analysis is described in Chapter 4.5,
• DOSE analysis is presented in Chapter 4.6.
The optional functions are described in the Apps. The additional functions of the instrument,
namely: the available ways of the measurement results presentation (DISPLAY list), the settings (SETUP
list) and the storing of the measurement results (FILE list), are described in Chapter 5.
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