36
•
Finally, select the time units: seconds ( ’’ ), minutes ( ’ ) or hours ( H ) with the help of
and
and press
to confirm. Use
to cancel or return to the
menu.
•
If you choose "t" as your numerical integration time value (it lies between values 1 and 99)
the integration time will coincide with measuring time. This option is useful when it comes
to evaluating ideal integration time. To apply the option, make a measurement with
integration time "t" and calculate the time needed for the bands in which you are interested
to stabilise.
2.5.2 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 spectrum analyser 1/3 mode and choose the screen you want to
display (numerical or graphic spectrum analyser 1/3) with the following keys:
Once you have selected your screen, press
to set the measurement process in
motion.
2.5.3 Functions display
The
SC310
measures all functions simultaneously. 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 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 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 and 10000 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 ).
Содержание SC310
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Страница 2: ...NOTE This version of the manual is valid for instruments with serial number from T224599 ...
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