8 Modes of measurement launching
8.1 Generalities
DB300
instrument
has four modes of measurement launching:
•
Immediate mode
: manual launching with the keypad.
•
Delayed mode - Tim.
: programmable launching and stop on a free duration
•
Repetitive delayed mode – Tim.:
launching from 2 to maximum 10 times of a daily programming limited to 24H59M00S.
•
I/O mode:
launching by order of an electronic signal (Example: industrial controller)
The following modes:
Delayed – Tim mode / Repetitive delayed – Tim mode and I/O mode
are related to the following
measurements modes.
Integrating – averaging with storage sound level meter – A and C weightings
Integrating – averaging with storage sound level meter – A, C and Z weightings and analyzer by filters of octave
bands from 16 Hz to 16 kHz (class 1) or from 31.5 Hz to 8kHz (class 2)
Analyzer sound level meter to measure the noise of equipment in correspondence with NR curves (as per NF S
30-010 standard)
Integrating-averaging sound level meter
, and
A, C and Z weighted and analyzer by third octave bands filters
(option)
Information:
When using the instrument in analyzer mode for the measurement of noise equipment in correspondence with NR curves (as per NF S
30-010):
•
Measurement start in
Tim.
mode only works for a T free duration programming and not for predefined durations (3 – 5 – 10 –
15 – 30 – 60 s).
•
When 0 VDC electrical voltage of control is reached in I/O mode or generally with the delayed programming
Tim
.:
•
The measurement stops after at least one elementary logging time (from 1 s to 60 s). The current last elementary logging time
is not taking into account in data.
•
The instrument saves metrological and audio data (if activated) at the end of the session
•
Every other start linked to a back of 5 VDC of control voltage in I/O mode or to a
Tim.
programming is performed after the end
of storage (see page 37).
8.2 Immediate mode
➢
Press key to launch the measurement.
8.3 Delayed – Tim. mode
It is possible to program the beginning and the end of the
measurement (date-time) of a free duration that can exceed several
days. For example: preparing the instrument for measurement during
the night.
➢
Select icon
Tim.
at the bottom right of the screen when set
the instrument before the measurement.
➢
Press
OK
to go the programming screen.
Modes of measurement launching
37
89,1
LpK
C
dB
1/2 s
.
88.7
61.4
-------
-------
dB
dB
01s
Tim.
LAeq
LCeq
dB
dB
00/00:00:00
LAeq,T
LCeq,T
E1
130
110
090
080
070
050
030
010
A C Z 63 250 1k 4k 16K
63.4
.
63
.
dB
1/8s
00/00:00:20
Hz
Tim.
1s
130
110
090
080
070
050
030
010
31.5 63 250 1k 4k 8k
---------
NR
.
T
1/8s
00/00:00:00
Tim.
