CESVA SC310, Руководство пользователя

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SC310
User’s Manual
95
To turn back to the measurement mode press:
8.5 Measuring in 1/3 extended Spectrum Analyser mode
In this mode, the SC310 makes a frequency analysis in real time in the one-third octave band
from 10 Hz a 20 kHz. Measuring the continuous equivalent sound-pressure level with a
programmable integration time for all the bands without frequency weighting and the overall
continuous equivalent sound-pressure level for the programmable integration time with
frequency weighting A, C and Z.
8.5.1 Prior adjustments: Integration time
Before beginning measurement in spectrum analyser mode, the following parameters should
be set:
• Integration time (T) used in the evaluation of spectral and overall levels. This integration is
carried out in consecutive intervals of T time.
To set this parameter, select the SETTINGS Î MEASURING Î SPECTRUM ANALYSER
option from the SC310 menu.
• Press the key to begin setting the T parameter and then follow the procedure
below:
•
Select your numerical value using and and confirm by pressing .
Integration time T may be set from:
o
1 to 59 seconds (1’’ – 59 ’’)
o
1 to 59 minutes (1’ – 59’)
o
1 to 99 hours (1H – 99 H)
• 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.
8.5.2 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.