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Casella Sound Level Meter Type 2 Kit with Standard Accessories Including Insight Database Software
Item #:
CEL-631-B2-K1
Brand:
Casella
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CEL-631-B2-K1 Sound Level Meter Type 2 Kit with Standard Accessories Including Insight Database Software by Casella
While many industrial hygiene professionals are interested in noise measurements inside the workplace there is also an increasing demand to measure environmental noise outdoors as well. The CEL-631 environmental noise analyzer has been designed to satisfy this need by providing overall data storage of varying noise levels during the day. The comparison of the different LN% values is useful in describing the variability of the noise over time. A super wide 120 dB dynamic range means that the user does not need to worry about selecting scales as the meter will always be on the right range. The provision of all the popular frequency & time weightings and exchange rates allow many different noise measurements to be taken by new and experienced users alike. The CEL-631 has a full-color, graphic LCD for complete clarity.
Key Benefits
- Wide dynamic range from 20 to 140 dB on single span
- A, C and Z simultaneous frequency weightings
- Slow, Fast and Impulse rms. simultaneous time responses
- Q=3, Q=4 and Q=5 simultaneous exchange rates
- Large 240 x 320 pixel color ¼ VGA graphic display
- Easy to use menu structure
- Storage of complete overall run results inc. 5 x LN%
- Manual or fixed duration recording possible
- Available in ANSI/IEC class 1 and class 2 accuracy
- Available as B or C version with real time octave & 1/3 octave band
- Storage of all results simultaneously in a huge non-volatile memory
- Up to 999 runs stored
- Available as complete measurement kits with acoustic calibrator and case
Applications
For measurements of many industrial noise levels the time average sound pressure level is often adequate. However, in many situations noise levels are variable or changing too quickly to accurately estimate the background level over a representative time period. The CEL-631 is designed to assist in the correct interpretation of these non-steady noise climates by including the percentile noise levels that have occurred during the run. The changing noise levels are sampled and the various percentile values such as the LN10%, LN50% and LN90% are calculated. This enables the CEL-631 to correctly record the key maximum, minimum, time average and 5 x percentile noise levels for comparison with national or international limits. Additionally, octave and third octave band filters in the B and C versions of the CEL-631 provide real time frequency analysis of tonal noise levels that are important for the correct prescription of hearing protectors or noise reduction applications such as barriers or earth bunds.Technical Specification - General | |
Accuracy | ANSI S1.4 & S1.43, IEC 61672-1 2002-5 |
Frequency filters comply with | ANSI S1.11 and IEC 61260 |
Microphone type | ½” Free field Electret microphone & preamplifier Type 1 or Type 2 on a removable CEL-495 preamplifier |
Reference Conditions | 68°F (20°C) air temperature 65% Relative Humidity 1013 mbar (101.325 kPa) atmospheric pressure |
Operating Temperature Range | 14 to 122°F (-10 to 50°C) (Class 1) 32 to 104°F (0 to 40°C) (Class 2) |
Effect of Humidity | Less than ±0.5dB over the range 30 to 90% RH (non-condensing), rel. to value at ref. conditions |
Operating pressure range | 650 to 1080 mbar (65 to 108 kPa) |
Batteries | 3 x AA Alkaline or NiMH rechargeable types |
Battery Life (hours) | Up to 12 hours without backlight |
Dimensions w x h x d (in/mm) | 2.8 x 10.5 x 1.2 in (71.5x 267.0x 31.0mm) including preamplifier and microphone |
Weight including batteries (oz/gm) | 10.1 oz (< 291g) |
Tripod socket for fixed measurements | Yes via standard camera thread (1/4” size) |
Operator controls | 8 buttons for power On/Off + 2 x context sensitive menu selection + 4 navigation + confirm selection |
Technical Specification – Performance | |
Total measurement range (dB) | 20 to 140 |
Dynamic range on single measurement span (dB) | 120 |
Noise floor (A weighted dB) | < 20 (Class 1), < 25 (Class 2) |
Frequency weightings | Simultaneous A, C & Z (unweighted) |
Time weightings | Simultaneous Slow, Fast and Impulse |
Amplitude weightings (Exchange rate) | Simultaneous Q=3, Q=4 and Q=5 dB |
Displayed parameters available as per user selected list or using pre-configured setups | Lp, Lmx, Lmn, Lpk Leq, LIeq, LDOD, Lavg, LAE, Ltm3, Ltm5 4 fixed LN% values plus 1 user selectable % value |
Narrow band real time measurements | (B version) 11 octave bands 16 Hz to 16 kHz (C version) 33 third octave bands 12.5 Hz to 20 kHz with cursor readout plus A & C & Z broad band levels |
Display of octave and third octave band levels | Graphical spectrum including broad band values With listing of individual band levels in tabular format |
Measurements in octave (& 1/3) band mode include | Lmx and Leq with selected freq and time weightings Plus 5 LN% spectra |
Display type | 240 x 320 full color dot matrix LCD digital including real-time analog bar graph scale |
Data storage 1 Gb internal memory | 999 run maximum memory storing all parameters over the whole of the run – overall results are recorded |
Direct printing of results on site | To portable battery operated printer on 3 in paper roll |
Displayed time span for time history graph on LCD | Last 60 seconds |
Signal detected when calibrator placed over microphone at 1 kHz frequency | Calibration level set to 114.0 or 94.0 dB With +/-1 dB span and 0.1 dB resolution by user |
External power option (12 Vdc) or via USB 5V line | Yes via universal CEL-PC18 unit |
Analog outputs | AC (and optional DC) via 2.5 mm jack socket |
AC output characteristics - (Provided for DAT tape / PC wav file recording or headphone applications) | Approx 0.85V RMS FSD output on selected
sound level measurement range. Minimum load impedance 22k. |
DC output characteristics - (Provided at time of order as option for connection to chart recorder or pc data logging system) | 0 to 1.3V DC for FSD on selected range. Output corresponds to selected frequency and time weighting. 2k Output impedance |
Digital output of stored result sets | Via USB 2.0 mini B connector to Casella Insight program |
Audio recording | Voice notes can be stored at the start of a run in wav file format for later identification and annotation |