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Casella CEL-633A1 Sound Level Meter Casella CEL Get Quote
 
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The CEL-633 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. Models are available for both 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-630 Series remains very simple to use.

Audio recording is a standard feature of the CEL-633, 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.

Key Features

  • A, C and Z simultaneous frequency weightings
  • Slow, Fast and Impulse rms. time responses
  • Large 240 x 320 pixel color ¼ 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
  • Wide dynamic range from 20 to 140 dB on single span

Applications

  • Period and time history profile recording
  • 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 ¼ 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
  • Noise event recording

Technical 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\nType 1 or Type 2 on a removable CEL-495 preamplifier
Reference Conditions 68°F (20°C) air temperature\n65% Relative Humidity\n1013 mbar (101.325 kPa) atmospheric pressure
Operating Temperature Range 14 to 122°F (-10 to 50°C) (Class 1)\n32 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
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\nLeq, LIeq, LDOD, Lavg, LAE, Ltm3, Ltm5\nLDN, LDEN, CNEL, 5 x LN%
Narrow band real time measurements (B version) 11 octave bands 16 Hz to 16 kHz\n(C version) 33 third octave bands 12.5 Hz to 20 kHz with cursor readout plus A & C & Z broad ban
Display of octave and third octave band levels Graphical spectrum including broad band values\nWith 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
Timed interval for regular data storage -632 & 633 models 1 sec to 1 hour in 13 fixed intervals for Periods\n1 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\nWav 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\nWith +/-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.\nMinimum 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

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