CEL-620 Integrating Real Time Analyzer from Casella USA

Many industrial measurements of complex noises require a complete knowledge of the variable noise level climate over a period of time. The CEL-620.A meter is designed to satisfy this need and to enhance it by providing the capture and display of the highest maximum level and lowest maximum level together with the integrated time average level.

A super wide 120 dB dynamic range means that the user does not need to worry about changing scales as it will always be on the correct scale and the provision of all the popular frequency and time weightings allow many different measurements to be taken by new and experienced user alike. A full color high precision, graphic LCD enhances the user experience with this new meter.

Applications

For measurements of simple noise levels the instantaneous sound pressure level is often adequate. However, in many real workplace situations the noise levels are variable of changing too quickly to accurately visually estimate the average level over a representative time period.

The CEL-620 is designed to assist in the correct interpretation of these difficult noise climates by providing the time average noise level with both the 3 and 5 dB exchange rates. Changing noise levels are properly integrating into the overall time average answer and displayed as the Leq (with Q=3) or the Lavg (with Q=5) exchange rates. This enables the CEL-620 to correctly assess changing noise levels.

Comparison of the results to the requirements of OSHA or ACGIH or NIOSH. Additional octave band filters in the B version of the CEL-620 provide for a comprehensive frequency analysis of difficult noise levels that is so important for the correct prescription of hearing protectors or other noise control applications.

Benefits

Wide dynamic range from 20 to 140 dB on a single setting
A, C and Z simultaneous frequency weightings
Slow, fast and impulse time responses at the same time
Large 240 x 320 pixel color 1/4 VGA graphic display
Easy to use menu structure
Integrating capability for time average values
Pre Configured setups
Available in ANSI/IEC class 1 and class 2 accuracy depending on application
Available in A version with broad band levels only
Available in B version with 11 real time octave band filters from 16 Hz to 16 kHz plus broad band results
Storage of all results simultaneously in a huge non volatile memory
Available as complete measurement kits with acoustic calibrator and case

Specifications

Accuracy	ANSI S1.4 & S1.43, IEC 61672-1, 2002-5 Filter comply with ANSI S1.11 and IEC 61260
Frequency Weightings	A, C & Z, unweighted
Time Weightings	Slow, Fast, Impulse
Microphone Type	Removable ½" free field electret microphone on fixed preamplifier, type 1 or 2 as specified on fixed preamplifier
Total Measurement Range	20 to 140 dB
Noise Floor (A weighted dB)	< 25, Class 1 < 30, Class 2
Dynamic Range on single measurement span (dB)	120 dB
Displayed Parameters Always Available on All User Available Screens	Instantaneous level - Lp, peak level Lpk
	Maximum level - Lmx
	Minimum level - Lmn
	Average levels, Leq, LDOD, Lavg, Ltm3, Ltm5
Display	Type: 240 x 320 full color dot matrix LCD screen including real time analog bar graph
	Resolution numeric (dB) - 0.1
	Resolution graphical (dB) - 1
Update Rate for Display	0.5 seconds
Displayed Time Span for Time History Chart	Last 60 seconds
Narrow Band Real Time Measurements	(B Version) 11 octave bands 16 Hz to 16 kHZ (C Version) 33 thrid octave bands 12.5 Hz to 20 kHz plus A & C & Z broad band levels
Display of Octave Band Levels	Auto scaled to optimize available screen resolution with listing of band levels in tabular format
Measurements Made in Octave (& 1/3) Band Mode Include	Lmx and Leq with selected freq and time weighting
Reset of Max/min/average Level from Key Press by User	Yes with non-decaying max/min hold
Calibration Method	Automatically recognized by meter
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	Yes via Universal CEL-PC18 Unit
Analog Outputs	AC and optional DC via 2.5 mm jack socket
AC Output Characteristics	About 0.85V RMS FSD output on selected sound level measurement range. Minimum load impedance 22kΩ
DC Output Characteristics	0 to 1.3 VDC for FSD on selected range. Output corresponds to selected frequency and time weighting. 2kΩ output impedance
Digital Output	USB 2.0 format of instantaneous sound level via "mini A" USB
Digital Output Characteristics	Instantaneous SPL output, software required, as per selected frequency and time weighting
Temperature Range	14 - 122ºF, Class 1 32 - 104ºF, Class 2
Effect of Humidity	Less than ±0.5 dB over the range of 30 to 90% RH non condensing
Operating Pressure Range	650 to 1080 mbar
Batteries	3 x AA alkaline or rechargeable types
Battery Life	Up to 12 hours without backlight
Dimensions	2.8 x 9.0 x 1.2"
Weight	10.1 ounces
Screen Languages for Display	English, French, German, Italian, Spanish menu selectable

Ordering Information

For pricing, please call AFC International at 1-800-952-3293, 219-987-6825 or fax 219-987-6826 or email sales@afcintl.com.

Description	Catalog No.
CEL-620 Type 1 with wrist strap and windscreen	CEL-620.A1
CEL-620 Type 1 with wrist strap, windscreen, calibrator, USB cable & case	CEL-620.A1/K1
CEL-620 Type 1 Octave Band Analyzer with wrist strap and windscreen	CEL-620.B1
CEL-620 Type 1 Octave Band Analyzer with wrist strap, windscreen, calibrator, USB Cable and Case	CEL-620.B1/K1
CEL-620 Type 2 with wrist strap and windscreen	CEL-620.A2
CEL-620 Type 2 with wrist strap, windscreen, calibrator, USB cable & case	CEL-620.A2/K1
CEL-620 Type 2 Octave Band Analyzer with wrist strap and windscreen	CEL-620.B2
CEL-620 Type 2 Octave Band Analyzer with wrist strap, windscreen, calibrator, USB Cable and Case	CEL-620.B2/K1
Acoustic Calibrator	CEL-120/1

Downloads

CEL-620 Integrating Real Time Analyzer Literature

CEL-120 Acoustic Calibrator Literature

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