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CASELLA USA
CEL-240 DIGITAL SOUND LEVEL METER
FREQUENTLY ASKED QUESTIONS
What accuracy is the instrument designed to fulfil?
The CEL-240 instrument complies with the international standards in the type 2 classifications that
classify the sound level meter as general-purpose instruments. This specifies an overall expected
accuracy of +/- 2 dB under normal measurement conditions. Use of the instruments as dosimeters by
visually averaging fluctuating noise levels may produce wider tolerances than this depending on how
well the "on time" of a notional average level is measured.
Are any results saved when using the SLM mode?
Results are not saved in the instrument when any of the available display modes are used. The CEL-
240 is intended to allow the instruments to be used as a simple sound level meter for quick hand held
surveys or as a simple front end to a data logging system in conjunction with a personal computer
running the optional dB24 software.
What markets is the instrument designed for?
There are three main markets for the CEL-240.
-
a simple meter for monitoring noise exposure in the workplace
-
a general purpose sound level meter for many environmental nuisance sources
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a short term noise meter for quick measurements on specific noise sources
How are these markets catered for by the CEL-240?
For many basic noise measurements the A weighted Slow response sound level will be all that is
required. For more specific noise measurements of sounds with a transient nature the C weighting
and the maximum hold feature will be of help. The meter can also be used as a simple teaching aid
in many noise or general sound studies especially with the optional digital output to a computer. The
tripod mount allows the meter to be fixed at a chosen location for longer term measurements that are
not likely to be adversely affected by the weather conditions.
For more details on the CEL-240 series, or any of the other Casella USA products, please contact
us:
Casella USA
(800) 366-2966
Info@CasellaUSA.com
FAQ's: ACCURACY & RESULTS
FAQ's: APPLICATIONS
Casella USA
17 Old Nashua Road, #15
Amherst, NH 03031
(800) 366-2966
Info@CasellaUSA.com
www.CasellaUSA.com
Page 6 of 6
31 Jan 2008
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