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CASELLA/CEL-231 & CEL-254 Sound Level Meters
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| Economical instruments for quick and easy noise measurements! |
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Key Features
- 3 models meeting IEC & ANSI Type 2 requirements
- Fast, Slow & Impulse Time Weightings
- Suitable for steady, impulsive and variable noise measurement
- Large, easy to read digital display
- AC & DC outputs to other devices
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| Applications |
CEL-231
The CEL-231 Digital Sound Survey Meter will appeal to everyone new to noise measurement as it is simple to use and understand.
It is suitable for spot checks around work areas as it provides readings in dB(A) the measurement criteria that most closely represents the way human hearing reacts to noise levels.
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CEL-254
The CEL-254 Digital Impulse Sound Level Meter has additional functions including the "C" frequency weighting, an impulse time weighting and a maximum hold feature.
Maximum hold will detect the highest level of noise and hold this on the screen.
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| Most suitable for steady noise levels |
Suitable for steady and fluctuating noise levels |
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| Constant noise or step-change levels with very little variation |
Impulsive noise or levels with minor variations over time |
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| The range of functions for each model is given in the tables below.
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| Specifications - Common Features |
| Accuracy |
+/-1dB under IEC 651, 804 Type 2 and ANSI S1.4 Type 2 reference conditions |
| Microphone |
1/4" Electret capsule with fixed preamplifier |
| Reference Conditions |
114 dB SPL, free field perpendicular incidence, 1 kHz, 20° C, 65%RH |
| Operating Temperature Range |
-10°C to +50°C operating (-20°C to +60°C storage) |
| Effect of Humidity |
<0.5dB 30% to 90% RH |
| Batteries |
4 x AAA Manganese Alkaline Cells |
| Battery Life |
20 hour typical (low battery indicator) |
| Dimensions |
258 mm x70 nm x 21 mm, 10.2 x 2.8 x 0.8 in. |
| Weight |
230 grams, 8 oz (with batteries) |
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| Specification |
CEL -231 |
CEL-254 |
| Leq measurement capability |
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| 30 - 135 dB(A) measurement range for instaneous sound level |
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| 70 dB overall dynamic range in 2 sub-ranges: 30-100dB and 65-135dB |
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| Frequency Weighting "A" |
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| Frequency Weighting "C" |
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| Time Weightings "Slow" and "Fast" |
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| Time Weightings "Impulse" |
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| Time Weightings Maximum Hold |
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| Pre-Weighting overload detector |
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| Compliance with ANSI S1.4 Type 2A Standard |
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| Compliance with IEC 651 Type 2 Impulse |
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| Compliance with IEC 804 Integrating Averaging SLM |
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| 3 1/2 digit Display, 12.7 mm high character LCD |
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| Customized Display, LCD showing measurement mode |
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| AC Conditioned 7.25 V RMS FSD Auxiliary Output. Minimum load impedance 39 kOhm |
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| DC Log RMS output nominally 25 mV/dB. Minimum load impedance 27 KOhm |
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| Ordering Information
Kits are available that include all of the equipment necessary to carry out an effective noise assessment. These include the specified sound level meter, a CEL-282 Class 2 Calibrator, CEL-4672 Wind/Dust microphone cover, operating instructions and CEL-5894 carrying case. Kits can be specified by adding /K1 after the instrument description e.g. CEL-254/K1. |
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