CEL/CEL-254/數(shù)字式（脈沖）聲級計

• CEL/CEL-254/數(shù)字式（脈沖）聲級計
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詳細資料：

The CEL-254 has additional functions to the CEL-231 including both A and C frequency weighting. It has Slow, Fast and an Impulse time weighting and a maximum hold feature.
The maximum hold will detect the highest level of noise and hold this on the display.
The CEL-254 is suitable for steady and fluctuating noise levels. An overload indicator and a low battery warning are included in the display. It is possible to check the battery condition anytime during operation. Both analogue AC and log DC outputs are available for feeding tape recorders or chart recorders. The CEL-254 features a 70 dB measurement range covering the range from 30 to 100 on the LO setting and 65 to 135 dB on the HI setting.
Common Features for the CEL-231, 254 and 269
Accuracy +/-1 dB under reference conditions IEC 60651:1996
Type 2, ANSI S1.4 1983 Type 2A
Display 3 1/2 digits 12.7 mm high character LCD
Auxiliary outputs: AC Conditioned 7.25V RMS. FSD
Minimum load impedance 39kohm
DC log RMS. output nominally 25mV/dB
Minimum load impedance 27kohm

Reference conditions: 114 dB SPL, free field perpendicular incidence 1kHz, 20 degree C, 65% RH
Temperature range: -10 degree C to +50 degree C operating
-20 degree C to +60 degree C storage
Humidity effect: < 0.5dB 30% to 90% RH
Batteries: 4 x AAA Manganese Alkaline Cells
Battery Life: 20 hrs typical - low battery indicator
Dimensions: 258mm x 70mm x 21mm
Weight: 230 grams ( with batteries)

儀器保證：

我們的大多數(shù)設(shè)備在裝運之前均經(jīng)過嚴(yán)格的質(zhì)量檢測與校驗。也可申請國家計量證書。