5 Make some measurements
5.1 Conventional sound level meter function
The sound level meter processes the signal and displays sound pressure and at the same time following informations :
• Temporally weighted sound pressure level.
• Maximum and minimum values of levels on the measurement time.
• Level of maximum peak sound level on the measurement time.
5.1.1 Adjustment prior to measurement
1 – Select L mode : move the cursor with arrow keys to 1 and select 'L' with the scrolling knob key.
2 – Select the weighting frequency and the time weighting.
For each weighting frequency, the sound level meter proposes the measurement according to three time
weightings : Fast (F) – Slow (S) – Impulse (I). Possible choices are :
A frequency weighting : LAF – LAS – LAI
C frequency weighting : LCF – LCS – LCI
Z frequency weighting : LZF – LZS – LZI
Place the cursor with arrow key on the area 2 and select with scrolling knob identified measurement
criteria among the possibilities listed above.
3 – Select the weighting frequency of peak level of sound pressure : move the cursor with the arrows
to 3 and select C or Z with the scrolling knob key.
5.1.2 Launch the measurement
The measurement is immediate, yet it is interrupted and reset with each change.
5.1.3 During measurement
During the measurement, two actions are possible :
• Reset memorized levels.
• Fix the measurement thanks to Pause function.
To reset all the values :
➢ Press OK icon, RAZ function is activated and concerns :
• LAF maximum and minimum levels
• Value of the maximum peak pressure
• Informations about overload
Pause function allows to stop the current measurement to avoid an unwanted event or to make a manual
record of results.
Press icon to stop the measurement then press it again to resume measuring.
Note : When the sound level meter is paused, no action is specified in the "Peak" at the top of the
screen.
Make some measurements 10
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Procedure
RAZ activation
Pause
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