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Casella Sound Level Meter Type 2 Printer Kit with Standard Accessories Including Insight Database Software

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Casella Sound Level Meter Type 2 Printer Kit with Standard Accessories Including Insight Database Software


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Casella Sound Level Meter Type 2 Printer Kit with Standard Accessories Including Insight Database Software

Casella Sound Level Meter Type 2 Printer Kit with Standard Accessories Including Insight Database Software



CEL-633-C2-K2 Sound Level Meter Type 2 Printer Kit with Standard Accessories Including Insight Database Software by Casella

Noise measurements from complex sources require a complete knowledge of the variable noise climate over an extended period of time. The CEL-633 model is designed to satisfy this need by providing overall, periodic and profile time history recording to suit almost any industrial or environmental measurement requirement.

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 and time weightings simultaneously allow many different noise measurements to be taken by new and experienced users alike. The fullcolor, high-precision, graphic LCD enhances the user experience with this new meter. Audio recording is possible.

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. time responses
  • Large 240 x 320 pixel color VGA graphic display
  • Easy to use menu structure
  • Optional data logging capability (model specific)
  • Regular timed or event triggered recording possible (model specific)
  • Available in ANSI/IEC class 1 and class 2 accuracy
  • Available with real time octave & 1/3 octave band filters plus 3 broad band results A, C & Z
  • Storage of all results simultaneously in a huge non-volatile memory
  • Period and time history profile recording
  • Noise event recording


For measurements of outdoor noise levels over extended periods of time the CEL-633 will be the most appropriate model. It provides all the required parameters for comprehensive EPA, HUD or similar studies. It provides the popular max, min, and time average levels in addition to the statistical or LN% parameters. The CEL-633 is designed to provide all the key results for these difficult environmental noise climates. Regular periodic recording at fixed intervals is provided in the CEL-633 model plus the addition of extra time history profile recording. The changing noise intervals are stored with the overall time average answer and displayed annotated with the time they occurred. Significant events can be triggered by noise level exceedances providing even more detail about what has happened. The audio signature is captured and can be used to identify the cause. Additionally, octave and third octave band filters in the B and C versions can provide frequency analysis of tonal noise levels that are important for the correct prescription of hearing protectors or noise reduction applications.
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
Input preamplifier/microphone CEL-495 removable preamp. plus ½” mic. capsule
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 (depending on model) Lp, Lmx, Lmn, Lpk
Leq, LIeq, LDOD, Lavg, LAE, Ltm3, Ltm5
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 -632 & 633 models 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

Datasheets & User Manuals

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