SC310
User’s Manual
99
8.5.6 Overload indicator
The SC310 is equipped with an overload indicator for each function. If overloading occurs
during measurement, the
^
sign will appear before the function affected by overloading.
When a function registers overload, its corresponding measurement will be incorrect.
When overloading occurs, the
indication will appear in the bottom right-hand corner of the
screen.
8.6 Measuring in FFT Narrow Band frequency Analyser Mode
This mode of the SC310 sound level meter carries out a FFT frequency analysis in real time.
As a result a spectrum of 430 effective lines is obtained, 86 of them are displayed on the
screen. Each line shows the continuous equivalent sound-pressure level with integration time
T (without frequency weighting).
To ease its display on the screen and the access to the desired frequency bands, the SC310
has a zoom tool of x1, x2.5 and x5.
8.6.1 Prior adjustments: Integration time
Before beginning a 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
