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Percentiles [USER Ln]
Model ‘L’ and ‘E’ instruments have one user selectable percentile level and two
fixed percentile levels. Percentile is commonly abbreviated to Ln where n
denotes the actual dB (A Weighted) level exceeded n% of the time, example
L99.
On model ‘L’ instruments percentiles are only available if the User Mode is set to
ALL or ENV. See
User Mode
for further information.
Fixed percentile levels are:-
•
L10
•
L90
In the
SETUP
display screen use the
arrow keys as required until the
following is displayed: -
Press
and the instrument will display the currently selected User Ln
indicated with an asterisk *.
Scroll through the available User Selectable Percentiles using the
arrow
keys: -
Display
Description
1
L1 – dB(A) Level exceeded 1% of the time
5
L5 – dB(A) Level exceeded 5% of the time
50
L50 – dB(A) Level exceeded 50% of the time
95
L95 – dB(A) Level exceeded 95% of the time
99
L99 – dB(A) Level exceeded 99% of the time
Press
to confirm a change and the instrument will briefly display: -
Or press
to cancel and return to the Sound Pressure Level display screen.
Percentile levels can only be accurately calculated after a given period governed
by various factors, they are therefore only shown for recordings greater than 5
minutes.
C
OK
OK
USER Ln
95*
DONE
