Casella Real Time Octave Band Type 1 Analyzer and Accessories

CEL-490-B1 Real Time Octave Band Type 1 Analyzer and Accessories by Casella

The CEL-490 is the ultimate instrument for long term community noise measurements where wide changes in levels are expected to occur. Previous generations of noise meters require the user to make a decision on the likely noise levels to be expected during the measurement. Select too high a range and the low background levels will be missed. Choose to low a range and the important peak levels will cause overloads and consequent errors. The single 140 dB range available in the CEL-490 enable worry free measurements over the whole audio range without changing range. A wide range and all the frequency information collected simultaneously with the power of DSP filters.

Key Benefits

• Single ultra wide 140 dB dynamic range
• A, C & Z plus whole octave or third octaves depending on model variant
• Full data logging as standard
• Over 800,000 data point nonvolatile memory
• Cumulative results for the whole of the run
• Regular periodic results at user specified intervals
• Time history profiles for builtin graphic level recording
• Storage intervals up to 100 spectra per second for rapid data capture of transients
• Slow, Fast & Impulse rms. responses plus Peak
• Simple menu operation using keypad and icon controls
• Menus in English, French, German, Italian and Spanish

Applications

• Long term noise surveys
• Reverberation time measurements
• All types of general noise measurements
• Frequency analysis of transient noise impulses
• Workplace noise surveys
• Transportation noise studies
• ANSI/IEC type 1 & 2 models

The CEL-490 comes into its own for difficult noise applications when rapid data recording is required. Spectral data capture as fast as 10 millisec per octave or third octave band spectrum ensures that even the most difficult transient sounds will be measured correctly with no loss of acoustic data integrity.

Remote control of the full operation of the meter from a pc using the included dB23 software enables stored runs to be quickly downloaded and the start and stop of new measurements to be made with a few mouse clicks. Connection can be direct by the included pc cable or by regular and GSM modems.

Operation and use

Every CEL-490 comes with a factory default measurement setup pre-configured for ready to go measurements. Additionally, up to 4 user-defined setups can be stored for specific measurement needs with a few or as many parameters chosen form the extensive list in order to customize the way a measurement is captured.

Community noise surveys can cover a total of 24 hours for a single run with hourly period results plus 1 minute profile data saved to show more detail. Up to 999 separate runs can be stored with up to 99,999 periods per run. Four key parameters can be saved as short time history profiles for traditional graphic level recorder operation.

Simple noise surveys can be captured with the overall ‘A’, ‘C’ and ‘Z’ weighted level plus all 33 third octave bands for continuous or impulsive noise sources making this an ideal instrument for the professional acoustics engineer. Statistical noise parameters such as the Ln10% and Ln90% levels are measured in broadband and third octaves.