CEL-6842 dB24 SOFTWARE PACKAGE
OVERVIEW
CEL-6842 dB24 Software for the CEL-24X Digital Sound Level
Meter series
Introduction
The recent introduction of the
CEL-24X Digital sound level
meter now provides a low cost
fully compliant general purpose
sound level meter with a variety
of measurement capabilities.
One of the strongest features of
the meter range is the digital
output that is available for use
with the user’s laptop or desktop
computer. Every second the
meter sends the A and C
frequency weighted sound level
values with the selected time
response to the dB24 software
that builds up a text file tagged
with the actual date and time
stamp for complete noise
identification purposes.
live display of noise levels with final data table
Applications & Operation





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
Regular data logging for
noise investigation purposes
Time history trending
Hard copy for archive
purposes
Analysis of short duration
significant events such as
pile driving or aircraft flyovers
Remove unwanted samples
when it is not required to
gather information
Investigation of
neighborhood noise nuisance
complaints
Unattended noise monitoring
at inconvenient times of the
day
Provide input to official
reports
The CEL-24X sound level meter
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text output in tabular format to
cut and paste into other
documents
CEL-6842 dB24 SOFTWARE PACKAGE
OVERVIEW
Downloading from the
CEL-24X meters
The CEL-242 and CEL-246
versions feature on board
memory to store noise levels on
site. Up to 100 separate runs can
be saved each tagged with the
date and start time of each run.
In the CEL-246 the time average
level Leq (Q5) or Lavg (Q5) can
be saved at any of 1, 2 5 or 10
second intervals.
A short header is also saved
showing the individual meter
serial number and the setup of
the meter at the time run was
started. An example is shown
below.
<CEL-242
Data>
Version
035-07
<Run>
11/4/2009
Start
23:02
Duration
0:10:44
Serial
Number
3691212
Run
2
Range
30-100 dB
Overload
No
Battery Low
No
Interval
Seconds
1
<Broadband>
LAFmax
79.7
Header information stored in a
run showing key details of the
overall measurement.
Casella Drive is a small utility
that is installed and loaded in the
background with dB24. After the
CEL-242
or
CEL-246
is
connected with the CMC51 USB
cable the Casella Drive utility
automatically starts up and
downloads the stored runs. The
connected sound level meter is
recognized automatically and
Windows establishes a new drive
allocation for it. Run data are
translated into standard csv
delimited text files in Casella
Drive.
The connected CEL-242 has
been recognized and added as a
new logical drive to the
computer, in this case as drive
letter H: Runs can be viewed in
the properties window when drive
H is selected in Windows
Explorer. Double clicking on the
run opens it in standard
spreadsheet packages if this has
been setup as the default action.
Typical spreadsheet example
programs are MS Excel and the
equivalent Open Office version
called Open Office Calc.
Office noise levels
<Profile LAFmax>
100
1 second max values (dBA)
In the CEL-242 basic sound level
meter the 1 second maximum
values of the A and C frequency
weighted noise levels are stored.
90
80
70
60
50
40
30
>
3
4
5
7
6
8
9
0
2
1
ax
:0
:0
:0
:0
:0
:0
:0
:1
:1
:1
m
23
23
23
23
23
23
23
23
23
23
F
9
9
9
9
9
9
9
9
9
9
A
L
00
00
00
00
00
00
00
00
00
00
e
/2
/2
/2
/2
/2
/2
/2
/2
/2
/2
fil
/4
/4
/4
/4
/4
/4
/4
/4
/4
/4
ro
1
1
1
1
1
1
1
1
1
1
P
1
1
1
1
1
1
1
1
1
1
<
time
Example of time history trace from MS Excel
Ordering information
CMC51
CEL-6842
Mini USB cable to computer 6 ft (no special drivers are required)
dB24 software supplied on CD (Windows XP, Vista & Win 7
compatible)
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