Manual

42
Global
SPL Slow
Statistics
A, C or Z
SPL Fast
SPL Impulse
SPL Peak
Leq and SEL
Average
1/3 Octave Spectrum
SPL Slow
Statistics
A, C and Z
SPL Fast
SPL Impulse
Leq and SEL Average
A, C and Z
FFT Spectrum
Leq and SEL Average
A, C and Z
Note: Only Z weighting is recorded for spectrums as frequency weighting can be applied in post-
processing.
Post-Processing Options
The available operations for this record mode on post-processing are:
• Limited event masking on the time-history
• Limited redefinition of averaging periods
• Calculating statistics on SPL
8.4.2 Sampling Rate
8.4.2.1 Instantaneous Record Mode
In Instantaneous Record Mode, the data rate can go from 10 ms to 1 s.
Some sampling rates may not be suitable for some measure types. If such a combination occurs, a
warning is displayed but does not prevent the user from proceeding with measurement. For
example, a sampling rate of 1 s is not suitable to correctly reproduce the Fast SPL as it is subject to
vary more rapidly in time.
The FFT rate is set automatically from 256 ms, 512 ms or 1024 ms according to the selected Sampling
Rate.