100
integration time "t" and calculate the time needed for the bands in which you are interested
to stabilise.
8.6.2 Beginning measurement
First of all, ensure that the sound level meter has no measuring operation in progress ( ). If
it has ( or ) press
to stop it.
Next, set the SC310 in FFT narrow band frequency analysis and choose the screen you want
to display with the following keys:
Once you have selected your screen, press
to set the measurement process in
motion.
8.6.3 Functions display
The
SC310
measures all functions simultaneously.
The value of the measured functions is refreshed each time that the consecutive integration
time, each T. Less in case that it is chosen the “t” integration time, then it will be actualised
each second.
Described below are the different ways of displaying the acoustic functions while
measurement is in progress. If you choose to change the kind of display (screen) or FFT line,
this will not stop the measurement process. While measurement is being carried out, you
cannot switch from one measurement mode to another. When the frequency range of display
changes then the cursor is placed at the central point of the screen.
Graphic FFT narrow band frequency analysis, zoom x1
This screen displays the following information in real time:
•
Visualization of the whole frequency range analysis (0 Hz – 20 kHz) in only one screen.
The line with the greatest value from each group of 5 lines of the frequency analysis is
showed (the frequency analysis consists on 430 effective lines and 86 display lines.
•
Graph of the continuous equivalent sound-pressure levels with integration time T (bars )
in real time.
•
Numerical value of the continuous equivalent sound-pressure level with integration time T
for the chosen FFT line (bar ) (without frequency weighting).
•
Frequency of the chosen FFT line (bar ).
