User`s manual

Table Of Contents
16.3 Leq SETTINGS
Time resolution
Selects the time resolution of the measurement. It is possible to choose a value
among 1s, 1/2s, 1/4s, 1/10s, 1/100s and 1/1000s. Normally choose the least
resolution possible as this choice directly reflects on the measured data size
(.leq binary files). This setting is not influencing the sampling frequency that
remains 48000Hz.
Frequency weighting
Selects the frequency weighting applied; you can choose either No Weight or A-
Weighting.
Peak mode
Selects how the peak is measured. You may select between the two:
- Max. The peak is the maximum value acquired given the particular time
resolution and frequency weighting.
- LUser.The peak is the maximum value of the LUser measurement.
Capture time data to disk
If active, during the measurement the acquired time data is saved to the hard
disk. It is then possible to create a standard wave file of the event measured for
later post processing. Be extremely careful when activating this feature as it
requires a huge amount of disk space: circa 6MB/min or 0.35GB/hour.
Maximum recordable time is 12 hours.
LUser integration
Selects the time integration of the user definable level measurement. You may
choose among the following:
- No. No integration is applied; the result is that the classical time history is
displayed.
- Impulse. Classical Impulse integration, 35ms time constant with 2.9dB/s
decay rate.
- 35ms. Modified impulse integration; only 35ms time constant.
214 16 Leq LEVEL ANALYSIS