CESVA SC310, Руководство пользователя

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This type of recording is very practical in that it saves the basic sound-measurement
functions: Short Leq, Fast every 125 ms (as from here you may calculate statistical data), the
peak level and three sound-measurement functions to choose from.
The following table shows the memory storage capacity of the different types of recording in
sound level meter mode:
Type of recording Storage capacity
1s functions 4 days 16 hours
125ms functions 3 days 5 hours
1s + 125ms functions 1 days 22 hours
F1 each second 8 months 14 days
F1, F2 and F3 each second 3 months 19 days
F1, F2 and F3 each second (+) 18 days 22 hours
L
T
+ L
IT
and partial percentiles every T
T= 1 s Î 28 days 18 hours
T= 1 min Î 4 years 9 months
F1, F2 and F3 are the acoustic functions chosen by the user on the preferential screen.
They may be any of those that the SC310 measures in sound meter mode.
3.3.2 Recording in spectrum analyser 1/1 mode
Recording in spectrum analyser 1/1 mode may be set through the SETTINGS
Î
RECORDING Î RTA RECORDING option, in which by means of the following options you
may set the periodicity and functions to be stored in the memory:
• T functions : once each integration time T has come to an end, the following values are
stored in the memory:
o
L
T
for each of the octave bands centred on frequencies 31.5, 63, 125, 250,
500, 1000, 2000, 4000, 8000 and16000 Hz
o
Overall L
T
with frequency weightings A, C and Z.
o
L
peak
with frequency weighting A, C and Z
o
1, 5, 10, 50, 90, 95 and 99% partial percentile levels corresponding to the
integration interval T for each of the octave bands and for the overall level with
frequency weighting A.
This kind of recording is conceived for long-duration measurements such as studies of
environmental noise and traffic noise, for which average noise spectral information is
needed.
• 125ms functions : saves the following 'short' functions every 125 ms:
o
L
T
with 125 ms consecutive integration time for each of the octave bands
centred on frequencies 31.5, 63, 125, 250, 500, 1000, 2000, 4000, 8000 and
16000 Hz