7 Perform some measurements
7.1 Conventional and averaging integrator sound level meter with storage
function
Select
L-Leq mode:
move the cursor with arrow keys on icon then press
OK
.
7.1.1
Conventional or classical mode
The measurement is immediate, yet it is interrupted and reset with each change. The sound level meter processes the sound pressure
signal and displays simultaneously the following information on S1and S2 screens.
•
LXY:
sound pressure levels weighted temporally
•
LXYmax and LXYmin:
maximum and minimum values of sound pressure level
since the beginning of the measurement.
•
LUpk:
maximum peak level of sound pressure.
•
09:16:50
: current time
Info
: Integrating-averaging mode starts only after pressing pictogram.
LAeq
and
LCeq
values are integrated on 1/16s in conventional mode for instantaneous
information, the timer remains at zero.
7.1.2
Possible selection for the measurement
1
– Select the weighting frequency and the time constant in direct visualization on the analog indicator
with hand.
For each time weighting, the sound level meter proposes the measurement according to 3 time constants: Fast (F) - Slow (S) –
Impulse (I). Possible selections are:
A-weighting
:
LAF
–
LAS
–
LAI
C-weighting
:
LCF
–
LCS
–
LCI
➢
Place the cursor with arrow key on the area
1
and select with scrolling knob identified measurement
criteria among the possibilities listed above.
2
– The selection of the frequency weighting for the sound peak pressure level
C
or
Z
is performed in the main
menu
“PROG.MESURE”.
3 –
During measurement, two actions are possible:
➢
Reset the memorized levels, mainly the peak pressure level
LCpk
➢
Go to
S2
screen to read the different values: instantaneous, minimum or maximum
values.
4-
To reset all the values:
➢
Press
OK
key,
RST
function is activated and is about:
•
Maximum and minimum sound pressure levels available on
S2
screen
•
The maximum peak pressure value and the linked bargraph
•
Overload information
24
Perform some measurements
103.6
LpK
C
dB
LAF
LAS
LAI
88.7
61.4
78.6
88.7
61.4
78.6
dB
dB
dB
Inst.
E2
LCF
LCS
LCI
dB
dB
dB
RAZ
1
RST activation
