Casella CEL 63X Series Octave Band Sound Level Meters

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The CEL-63X series includes the CEL-630, CEL-631, CEL-632 and the CEL-633 models with additional features compared to the similar CEL-62X series meters. One key addition in the CEL-63X series is the ability to remorely attach the microphone and preamplifier by means of a suitable extension cable. Another key advantage is the ability to specify a model with time history data logging  recording to collect noise samples at regular intervals during a measurement survey.

The CEL-63X series is a range of sound level meters designed to appeal to those users looking to do advanced noise studies in industrial noise or environmental noise situations or to investigate specific noisy products with a view to controlling the noise output to meet mandated limits.

The CEL-63X series is available to satisfy both the ANSI/IEC type 1 and Type 2 accuracy classifications by the choice of the appropriate microphone capsule. Both of the standard half inch diameter microphones give the CEL-63X series a single wide measurement range from 20 to 140 dB without the need to change ranges. This will greatly simplify the collection of results since it removes the requirment to select the right range before starting to record the changing noise levels.

Three models are available designated as A, B and C versions. These differ in the amount of detail they are able to display as far as the frequency content of the noise is concerned. A version meters provide the overall broadband results with the A, C and Z (unweighted) channel for all measurements. B version meters add the capability to record 11 simultaneous octave bands from 16 Hz to 16 kHz while the C version models add 33 third octave band measurements from 12.5 Hz to 20 kHz.

All the CEL-63X meters measure with the Slow, Fast, Impulse and Peak responses simultaneously and calculate the time average noise level with the 3, 4 and 5 dB exchange rates in every run. The maximum, minimum and time average noise levels are calculated and stored for all measurements with all the valid combinations of frequency weightings and time responses so that the user will always have a full picture of what happened without having to be concerned about the correct setup configuration to use for a specific measurement. Measurements can be paused to remove unwanted noises from a survey and up to 99 separate measurements can be saved into the memory of the meter for later download to computer.

All results are viewed on the high resolution quarter VGA LCD that uses color as an indicator to guide the new (or experienced) user through the measurement procedure. A backlight function allows viewing the meter display even in very low light levels and can be activated with a fixed timer or by a simple button press. Color bars at the top and bottom of the screen indicate to the user which mode the meter is currently in for clarity and ease of use. Red means the instrument is in standby mode, green means running and collecting data and blue shows recalled answers from the memory.

Calibration is extremely easy too and virtually foolproof. Simply place the calibrator over the microphone and switch on, the meter will recognize the tone and prompt the user to accept or decline the calibration. Press the accept button to acknowledge the calibrator signal and the meter adjusts to the correct level and stores the fact for inclusion in the following measurements. Pre and post measurement calibration can be carried out too.

Run results can be stored for later retrieval by the user using the integral high speed USB interface. Measurement files can be read using the CEL-63X plugin which is available for the Casella Insight Database Management Software. Results that include audio files where they have been captured can be downloaded so that results from the sound level meter and CEL noise dosimeters can be integrated into a single comprehensive report for management use if required.

The CEL-63X meters can be powered from an external 12 Vdc source such as a mains supply or car battery for extended measurements and an ac (or optional dc) output signal is available to feed other recording instruments if required.

Included in a CEL-63X instrument

• CEL-63X Wide range integrating sound level meter includes a set of 3 x AA batteries for up to 10 hours use, a wrist strap and a USB connection cable to computer. A calibration and conformance certificate is provided for all meters in the series.

Included in a CEL-63X instrument kit

• The standard CEL-63X/K1 sound level meter kit includes the required meter (CEL-63X.A1 or 2, CEL-63X.B1 or 2 or CEL-63X.C1 or 2 meter and microphone) plus a matching acoustic calibrator in a small foam lined kit case with a copy of the Casella Insight software.
• The advanced CEL-63X/K2 kit includes a slightly larger attache kit case plus a portable printer and cable for on site printout of the measured noise results.

Features Applications Specifications Downloads Casella CEL-630 The CEL-630 is incredibly powerful yet amazingly simple to operate.  For any advanced sound level measurement requirement the CEL-630 is an excellent choice. Its durable construction makes it ideal for workplace noise measurement or environmental noise studies – it’s used worldwide by environmental engineers for ambient noise monitoring and industrial hygienists for analyzing hazardous noise sources in the workplace. A digital integrating sound level meter, the CEL-630 is engineered to satisfy more detailed noise studies and is an aid in implementing engineering noise controls to meet mandated exposure limits. Casella CEL-631 The CEL-631 meter is a developed version of the CEL-630 and adds the capability to measure 5 statistical parameters for environmental noise measurements. Casella CEL-632 The CEL-632 real time logging noise analyzer is the best choice for a logging noise meter that will give both overall and regular time histories of captured noise levels over extended periods of time. It has all of the features of the CEL-630 model in the CEL-63X range plus the ability to record regular noise samples at fixed intervals during a measurement making it the ideal choice for many basic environmental surveys or for use by industrial hygienists. Casella CEL-633 *Available for Rental* The CEL-633 real time logging environmental noise analyzer is the top of the range of the CEL-63X series. It has all of the features of the other models in the CEL-63X range making it the ideal choice for comprehensive environmental surveys or for use by consultants. Broadband Sound Measurement Whole Octave Sound Measurement Third Octave Sound Measurement OSHA Sound Studies Workplace Noise Monitoring Industrial Hygiene Environmental Noise Monitoring CEL 633 Specifications 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 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 Displayed parameters available as per user selected list or using pre-configured setups Lp, Lmx, Lmn, Lpk Leq, LIeq, LDOD, Lavg, LAE, Ltm3, Ltm5 LDN, LDEN, CNEL, 5 x LN% 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 Display type 240 x 320 full color dot matrix LCD digital including real-time analog bar graph scale Data storage for time history logging – periods and profiles (depending on model) 1 Gb internal memory 999 run maximum memory, long term recording is separated into "24 hr days" that can be recombined in Insight software for later analysis and review Timed interval for regular data storage in periods and profiles 1 sec to 1 hour in 13 fixed intervals for Periods 1 sec to 30 mins for Profiles Event capture above user selectable level with audio recording in wav format for identification User selectable trigger level 40 – 140 db in 1 dB steps Wav file stored at hi, med or lo resolution 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 - 0 to 1.3V DC for FSD on selected range. Digital output of stored result sets Via USB 2.0 mini B connector to Casella Insight program Title Description Download CEL-63X Manual Operator's Manual CEL-630 Datasheet Datasheet CEL-631 Datasheet Datasheet CEL-632 Datasheet Datasheet CEL-633 Datasheet Datasheet Noise Glossary Reference Guide Intro to Industrial Noise Measurements Reference Guide