產品簡介 :
聲級計又叫(噪音計)是噪聲測量中最基本的儀器。
聲級計一般由電容式傳聲器、前置放大器、衰減器、放大器、頻率計權網(wǎng)絡以及有效值指示表頭等組成。?
聲級計的工作原理是:由傳聲器將聲音轉換成電信號,再由前置放大器變換阻抗,使傳聲器與衰減器匹配。?
放大器將輸出信號加到計權網(wǎng)絡,對信號進行頻率計權(或外接濾波器),然后再經衰減器及放大器將信號放大到一定的幅值,最后經過數(shù)字電路處理器處理后,在LCD上顯示相應的數(shù)值。
技術參數(shù)
?傳感器 | 1/2英寸電容式麥克風? |
?測量范圍 | 30~130dBA 35~130dBC |
?測量精確度 | ±1.5dB? |
?頻率響應 | 31.5HZ~8.5KHZ |
?頻率計權 | A/C? |
?數(shù)據(jù)通信 | ?--- |
?數(shù)據(jù)分析 | --- |
?數(shù)據(jù)存儲 | --- |
?AC/DC信號輸出 | 有? |
?低電提示 | 有? |
?過載提示 | 有? |
?位數(shù)和分辨率 | 5位數(shù) & 0.1dB |
?時間計權 | Fast/Slow? |
?值鎖定 | 有 |
?
包裝規(guī)格
?電源 | 9V 電池? |
?產品凈重 | ?126g |
?產品尺寸 | ?207*70*29mm |
?包裝方式 | ?彩盒包裝 |
?標準外箱容量 | ?20pcs |
?標準外箱尺寸 | ?45*32*55cm |
?標準外箱毛重 | ?14kg |
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