Operation & Use
The 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 octave.
Benefits
- Single 140 dB ultra wide dynamic range
- A, C & z plus whole octave or third octaves depending on model variant
- Full datalogging as standard
- Over 800,000 data point non volatile memory
- Cumulative results at user specified intervals
- Regular periodic results at user specified intervals
- Time history profiles for built in graphic level recording
- Storage intervals up to 100 spectra per second for rapid data capture or transients
- Slow, Fast & Impulse rms. responses plus Peak
- Simple menu operation using keypad and icon controls
- Menus in English, French, German, Italian and Spanish
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.
Specifications
| Broadband Measured Parameters |
Instantaneous level, Lxy, maximum level Lxymx, minimum level Lxymn, peak level Lxpk, average level (Q=3) Lxeq, average level (Q=4) Lavg, average level (Q=5) Lavg, takmaximal levels Ltm3 & Ltm6, exposure level LxE, LCeq-LAeq, LEPD |
| Octave and Third Octave Band Measured Parameters |
Instantaneous level Lxy, maximum level Lxymx, minimum level, Lxymn, average level Lxeq, peak level Lxpk, 5 user selectable LN% values |
| Acoustic Accuracy |
ANSI S1.4 (R1997) type 1 & type 2, IEC 61672:2002, IEC 60651:1994, IEC 60804:2000, IEC 61260:Class 0 |
| Microphone Details |
CEL-250 precision electret capsule for type 1 models, CEL-485 combined electret microphone and preamplifier for type 2 models` |
| Broadband Frequency Weightings |
'A', 'C' and 'Z' (linear, un-weighted, all pass level) |
| Frequency Response (Hz) |
6.3 Hz to 30 kHz for -3 dB down points |
| Octave Band Center Frequencies |
11 simultaneous bands with center frequencies 16 Hz to 16 kHz |
| Third Octave Band Frequencies |
33 simultaneous bands with center frequencies 12.5 Hz to 20 kHz |
| Time Weightings (Response) |
Slow and Fast and Impulse for rms |
| Peak Frequency Weighting |
'A', 'C' or 'Z' separate from rms weighting |
| Dynamic Range for Display |
140 dB |
| Noise Floor (dB) |
16.5 'A' weighted, 19.7 'C', 23.4 'Z' weighted |
| Maximum Noise Level (dB) |
140 dB rms, 143 dB peak (with standard 50 mV/Pa cel-250 mic) |
| Resolution (dB) |
0.1 dB across whole range |
| DSP Sampling Rate (Hz) |
67,200 Hz sampling with true rms. values calculated digitally |
| Histogram Classwidth (dB) |
143 x cells at 1 dB steps for full 140 dB range plus over range and user range cells (user selectable for broadband measurements) |
| Memory Storage Capability |
2 Mbytes (over 800,00 data points) 25,000 full octave spectra |
| Sampling Intervals in Periods Up to 14 Parameters (User Selected) |
19 times from 10, 20, 50, 100, 250, 500n mmsec, 1, 5, 10, 15, 20, 30 sec, 1, 5, 10, 15, 20, 30 min (p-rofile interval time must be </= period times) |
| Sampling Intervals, Up to 4 Broadband Time History Profiles (User Selected) |
18 times from 10, 20, 50, 100, 250, 500 msec, 1, 5, 10, 15, 20, 30 sec, 1, 5, 10, 15, 20, 30 min |
| Duration for Measurement |
12 durations from 1, 5, 10, 15, 20, 30 min, 1, 2, 4, 8, 12, 24 hour |
| Delayed Start & Stop for Runs |
Up to 7 pairs of delayed timers can be set up to 30 days in advance |
| Calibration Method |
Manual or automatic set to user entered dB level, last 4 calibration details saved for review and verification of stability |
| Configurations Saved in Memory |
1 factory defaults plus 4 user configured setups per bandwidth |
| Analog Output |
AC signal 0.5 V rms at 94 dB with 114 dB FSD (plus optional log DC output 0 to 2 V for 0 to 140 dB at 14.28 mV/dB) |
| Digital Output |
Download or remote control of operations of meter via dB23 software |
| Baud Rate for Digital Transfer |
8 settings from 9600 to 115200 baud |
| Screen Languages for Display |
English, French, German, Italian, Spanish menu selectable |
| LCD Screen Display |
128 x 64 pixel monochrome backlit display with icon indicators |
| Battery |
4 AA alkaline cells, 15 hours typical life or 12 VDC at 150 mA nominal via 2.1 mm power connector |
| Dimensions |
13.4" x 4" x 1.5" |
| Weight |
19.3 ounces |
Ordering Information
For pricing, please call AFC International at 1-800-952-3293, 219-987-6825 or fax 219-987-6826 or email sales@afcintl.com
| Description |
Catalog No.
|
| Broadband, ANSI Type 1 |
CEL-490.A1
|
| Broadband, ANSI Type 2 |
CEL-490.A2
|
| Octave Band , ANSI Type 1 |
CEL-490.B1
|
| Octave Band, ANSI Type 2 |
CEL-490.B2
|
| Third Octave Band, ANSI Type 1 |
CEL-490.C1
|
| Third Octave Band, ANSI Type 2 |
CEL-490.C2
|
| Broadband, ANSI Type 1 Kit includes calibrator, windscreen & case |
CEL-490.A1/K1
|
| Broadband ANSI Type 2 Kit includes calibrator, windscreen & case |
CEL-490.A2/K1
|
| Octave Band, ASNI Type 1 Kit includes calibrator, windscreen & case |
CEL-490.B1/K1
|
| Octave Band, ANSI Type 2 Kit includes calibrator, windscreen & case |
CEL-490.B2/K1
|
| Third Octave Band, ANSI Type 1 Kit includes calibrator, windscreen & case |
CEL-490.C1/K1
|
| Third Octave Band, ANSI Type 2 Kit includes calibrator, windscreen & case |
CEL-490.C2/K1
|
| Type 1 Acoustic Calibrator |
CEL-110/1
|
| Type 2 Acoustic Calibrator |
CEL-110/2
|
|
