5.4 Sound level meter and averager integrator with storage function
The sound level meter processes the acoustic signal for each elementary integration time and stores results in a saved memory.
Measured and stored data for each integration time:
•
LXeq, DI : equivalent continuous sound level of acoustic pressure on the logging time and frequency weighted.
•
LUpk : level of maximum peak of sound pressure on the elementary integration time.
•
Measurement time expressed in DD/HH:MM:SS
Integration time :
Data storage is made according to logging time (DI) to choose from : 1s, 2s, 3s, 5s, 10s, 15s, 30s, 60s.
Note : In order to have permanent control of the sound pressure level before the launch of measurement, the sound level meter
calculates and displays the equivalent continuous level of acoustic pressure on a logging time of 0.5s.
5.4.1 Adjustment prior to measurement
1
– Select
Leq-St
mode
: move the cursor with arrow keys to
1
and select
'Leq-St'
with the scrolling knob key.
2
– Select the weighting frequency.
Possible choices are :
A
frequency weighting -
C
frequency weighting -
Z
frequency weighting.
Place the cursor with arrow key on the area
2
and select with scrolling knob
A
,
C
or
Z
.
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.
4
– Select the DI logging time :
Place the cursor on 4 and select with the scrolling knob among :
1s, 2s, 3s, 5s, 10s, 15s, 30s, 60s.
5.4.2
Launch the measurement
In
manual
mode : directly press icon ,the timer starts and shows the measurement time
In
I/O
mode : see chapter « Launching a measurement in I/O mode ».
5.4.3 During measurement
During measurement,
three screens
inform the current measurement. They are accessible through the
scrolling knob key.
E1 :
it is the main screen that displays the instantaneous measurements.
•
LXeq0,5 :
equivalent continuous level of acoustic pressure over a systematic integration time of
0,5s.
•
LXeqDI :
equivalent continuous level of acoustic pressure over the scheduled elementary
integration time
•
LXeq :
equivalent continuous level of acoustic pressure on ongoing measurement time.
•
LUpk :
level of maximum peak of sound pressure on the measurement time.
•
Measurement time
expressed in DD/HH:MM:SS
15
Make some measurements
Procedure
1
2
3
4
Screen 1
