Measurement duration:
T
left to the initiative of the user according to the manual start/stop mode (with the keyboard)
Predefined
T
to select between the durations:
3 s, 5 s, 10 s, 15 s, 30 s, 60 s.
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 1/8 s.
7.4.1
Settings to perform before a measurement
1
– Select the
T mode
or the
predefined mode
Move the cursor in
1
and select with the scrolling knob key:
T
or
3 s, 5 s, 10 s, 15 s, 30 s, 60 s
.
T mode:
by selecting
T
the measurement begins with a manual start
Data are stored at he end of the measurement with a manual stop.
Predefined mode
: by selecting a value between
3 s, 5 s, 10 s, 15 s, 30 s, 60 s
, the measurement begins with
a manual start.
2
– Select the launching mode in
2
with the scrolling knob key:
Man
(manual) –
Tim
(timer) –
I/O
(with I/O
signals):
In predefined mode of the measurement duration (3 s, 5 s, 10 s, 15 s, 30 s, 60 s), only the manual mode is
accessible.
Tim. and I/O modes:
(see page 37)
Note
: current time is displayed before launching the measurement
7.4.2
Launch the measurement
Type of launch:
Manual
Tim. and I/O mode:
(see page 37)
1
– Select the measurement duration:
➢
Move the cursor in
1
and select with the scrolling knob key:
T
or a predefined duration between
3 s and 60 s
➢
Press key, the timer starts and indicates the measurement duration.
7.4.3
During the measurement
During the measurement, three screens give information about the ongoing measurement. They are accessible with the scrolling knob
key.
S1:
it is the main screen, it displays values and graphical representation (spectrum type):
The different bars stand for:
•
LXeq:
equivalent continuous levels of sound pressure on the measurement duration filtered by octave bands from 31.5 Hz to
8 kHz
•
Measurement duration in DD/HH:MM:SS
S2:
this screen displays the results of values that will be stored at the end of the measurement.
•
LCpkMax:
maximum peak pressure level of the ongoing measurement
•
LAeq
-
LCeq - LZeq:
equivalent continuous levels of sound pressure A, C and Z-weighted on the duration of the ongoing
measurement.
•
LXeq:
equivalent continuous levels of sound pressure on the duration of the ongoing measurement filtered by octave bands
from
31.5Hz to 8 kHz
Perform some measurements
33
1
110
090
080
070
050
030
010
31.5 63 250 1k 4k 8k
--
NR
.
T
00/00:00:00
Man
110
090
080
070
050
030
010
31.5 63 250 1k 4k 8k
--
NR
.
E1
00/00:00:05
