96
Next, set the SC310 in extended spectrum analyser 1/3 mode and choose the screen you
want to display (numerical or graphic) with the following keys:
Once you have selected your screen, press
to set the measurement process in
motion.
8.5.3 Functions display
The
SC310
measures all functions simultaneously.
The value of the measured functions is actualised 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 decide to change the kind of display (screen) or one-third
octave band, this will not halt the measurement process. While measurement is being carried
out, however, you cannot switch from one measurement mode to another.
Graphic extended spectrum analyser 1/3 screen
This screen displays the following information in real time:
•
Graph of the continuous equivalent sound-pressure levels with integration time T (bars )
in real time for one-third octave bands centred on the frequencies 10, 12.5, 16, 20, 25,
31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600,
2000, 2500, 3150, 4000, 5000, 6300, 8000, 10000, 12500, 16000 and 20000 Hz (without
frequency weighting).
•
Numerical value of the continuous equivalent sound-pressure level with integration time T
for the chosen one-third octave band (bar ) (without frequency weighting).
•
Central frequency of the chosen one-third octave band (bar ).
•
Numeric overall value of the equivalent continuous sound pressure level with T integration
time and frequency weightings A, C and Z.
To change the chosen one-third octave band (bar ) press
(left) and
(right).
By pressing
you access the numerical extended spectrum analyser 1/3 screen.
The SC130 measures "short" (125 ms) functions, although these are not displayed on-
screen. They may be viewed only through the software, through real-time connection with the
sound level meter or by making a recording and subsequently downloading it by means of
the software into a PC. These functions are:
