Casella USA CEL 240 Series Frequently Asked Questions Manual

CASELLA USA
CEL-240 DIGITAL SOUND LEVEL METER
FREQUENTLY ASKED QUESTIONS

CEL 240 Series

Digital Sound Level Meter

Frequently Asked Questions

Casella USA is proud to announce the CEL-240 sound level meter. These
FAQ’s help to give an overview of the current models, answer some of the
more typical questions that arise and describe how they fit into the overall CEL
product portfolio of noise measurement instruments.

INTRODUCTION

How does the instrument fit into the CEL range?

COMPARISON OF MODELS

What models are there in the range?
What are the main features & benefits of the CEL-240?

OPERATION

How long will standard alkaline batteries last in a CEL-240?
Can rechargeable batteries be used in a CEL-240?
How can the instrument be powered from an external source?
Can the microphone of a CEL-240 be removed?
Can the CEL-240 be used for outdoor measurements?
How quickly does the digital display update during measurements?
Is the time history trace stored in the CEL-240?
What outputs are available from the CEL-240?
What are the characteristics of the ac output?
What are the characteristics of the dc signal?
What are the characteristics of the digital output?

INSTRUMENT FUNCTIONS

What measurement ranges does the CEL-240 cover?
What results can be measured in a CEL-240?
What rms frequency weightings are available in the CEL-240?
What time weightings are available in the CEL-240?
What exchange rates or Q values are available in the CEL-240?
How do I calibrate the CEL-240?

ACCCURACY & RESULTS

What accuracy is the instrument designed to fulfil?
Are any results saved when using the SLM mode?

APPLICATIONS

What markets is the instrument designed for?
How are these markets catered for by the CEL-240?

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[phone] 31 Jan 2008
[e-mail]

CEL-240

“EZ does it”

CASELLA USA
CEL-240 DIGITAL SOUND LEVEL METER
FREQUENTLY ASKED QUESTIONS

FAQ’s: INTRODUCTION

How does the instrument fit into the CEL range?

CEL-200 Series

The simplest meters in the CEL range remain the CEL-200 series including the
existing CEL-231 and 254 models and now the new CEL-240. These 3 models are
ANSI type 2 accuracy sound level meters with Sound Pressure Level (SPL),
Maximum Noise Level (Max) and Impulse response (not CEL-231) measurement
capabilities.

CEL-300 Series

The intermediate range of convertible personal noise dosimeters or logging
sound level meters is in the form of the CEL-320 or CEL-360. Simply swap out
the microphone inputs to convert the dosimeter into the sound level meter or vice
versa. Both models feature ANSI type 2 accuracy for overall measurements. The
new CEL-350 dBadge dosimeter adds a small badge style dosimeter with cable­less microphone to the range for added convenience.

CEL-400 Series

The mid range sound level meters are the CEL-430, 450 and 490 providing
recording of level against time or level against frequency. The 450 and 490
instruments are fitted with parallel (real time) frequency analysis capability in
either full octave or third octave bands. ANSI type 1 and type 2 / data logging or
non-data logging models are available for the CEL-400 sound level meter range.

CEL-500 Series

The top of the range meters are the CEL-553, 573 and 593 real time analyzers which
feature parallel capture of level against time and frequency. A range of versatile upgrade
options for such specific tasks as Rapid Data Storage, Building Acoustics, Sound
Quality and Long Term Logging measurements are also available. All models meet the
ANSI type 1 models are available.

Casella USA Page 2 of 6
[phone] 31 Jan 2008
[e-mail]