Environmental Monitoring Equipment & Supplies • Sales, Rental & Service by Enviro-Equipment — Charlotte, North Carolina USA
The CEL-633C series is an easy to use instrument designed to undertake the measurement requirements of workplace and environmental noise. It also complies with the latest IEC and ANSI international standards for sound level meters. Just switch on the instrument, auto-calibrate and start measuring with one of the predefined views. Regardless of the view selected, all data is measured and stored simultaneously so no mistakes can be made.
By implementing the latest digital technology, the meter has a single measurement range so no range adjustment is required, ensuring the highest levels of performance with all noise sources. The CEL-633C can be used for environmental and/or occupational noise with the availability of frequency analysis and advance functions such as data markers, timers and logging of time history data. Even with such advanced functionality, the CEL-633C Series remains very simple to use.
Audio recording is a standard feature of the CEL-633C, all models having a voice notes capability. This allows you to speak into the microphone before or after a measurement in order to annotate the result, so you don't need to write things down. Data can also be 'marked' during a measurement to signify either an anomalous or significant event and audio is also recorded for later noise source identification. If the instrument is used for unattended measurements, audio recording can be triggered by a condition such as a given level being exceeded for a period of time. In this case additional data will be collected along with the audio. This can be especially useful where the noise source of interest is transient.
When the unit is calibrated with the CEL-120 calibrator, the calibration dates and times are stored and downloaded to Casella insight software, validating the accuracy of measurements. Average, peak, and octave band measurements are performed at the same time, so only one measurement needs to be made for all workplace noise applications. Data can be marked to signify any significant events, the data from which can be removed afterwards in insight software.
Meets ANSI type 1 requirements
Results can be downloaded into the Casella Insight Software. Records can be manipulated, such as changing the governing body from ISO to OSHA.
A cumulative measurement produces a single set of results for the entire measurement duration. The cumulative data set alone does not provide time history information. To include time history information for the measurement, you can enable Profile recording.
Periodic measurements allow the total measurement duration to be divided into separate fixed time intervals. In Periodic mode, a full set of results is stored at the end of each time interval, whereas in Cumulative mode a single full set of results is stored at the end of the measurement run. You can set the Periodic Interval to one of the following: 1, 2, 5, 10, 15, 20, 30 or 60 minutes; 2, 4, 6, 8, 12 or 24 hours
The profile recording supports a more limited set of functions, including LAeq, LAIeq, LCpk, LAFmax, LASmax, LAImax, and optional Ln% statistics (Broadband Fast A-weighted Lns only). When you use profile recording, you can set the interval of each of the profile measurements to one of the following: OFF; 1, 2, 5, 10, 15, 20, 30, 60 seconds; 2, 5, 10, 15, 20, 30, 60 minutes
|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|
|CEL 633C Octave Band Analyzer Manual||Operator's Manual|