Casella Environmental Sound Level Meter Type 1 with Standard Accessories

CEL-631-A1 Environmental Sound Level Meter Type 1 with Standard Accessories by Casella

While many industrial hygiene professionals are interested in noise measurements inside the workplace there is also an increasing demand to measure environmental noise outdoors as well. The CEL-631 environmental noise analyzer has been designed to satisfy this need by providing overall data storage of varying noise levels during the day. The comparison of the different LN% values is useful in describing the variability of the noise over time. 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 & time weightings and exchange rates allow many different noise measurements to be taken by new and experienced users alike. The CEL-631 has a full-color, graphic LCD for complete clarity.

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. simultaneous time responses
• Q=3, Q=4 and Q=5 simultaneous exchange rates
• Large 240 x 320 pixel color ¼ VGA graphic display
• Easy to use menu structure
• Storage of complete overall run results inc. 5 x LN%
• Manual or fixed duration recording possible
• Available in ANSI/IEC class 1 and class 2 accuracy
• Available as B or C version with real time octave & 1/3 octave band
• Storage of all results simultaneously in a huge non-volatile memory
• Up to 999 runs stored
• Available as complete measurement kits with acoustic calibrator and case

Applications

For measurements of many industrial noise levels the time average sound pressure level is often adequate. However, in many situations noise levels are variable or changing too quickly to accurately estimate the background level over a representative time period. The CEL-631 is designed to assist in the correct interpretation of these non-steady noise climates by including the percentile noise levels that have occurred during the run. The changing noise levels are sampled and the various percentile values such as the LN10%, LN50% and LN90% are calculated. This enables the CEL-631 to correctly record the key maximum, minimum, time average and 5 x percentile noise levels for comparison with national or international limits. Additionally, octave and third octave band filters in the B and C versions of the CEL-631 provide real time frequency analysis of tonal noise levels that are important for the correct prescription of hearing protectors or noise reduction applications such as barriers or earth bunds.