| general features & specifications | 一般功能和規(guī)格 | | | ar-814 | ar-824 | | measuring range | 30～130dba | 30～130dba | | 測量范圍 | 35～130dbc | 35～130dbc | | accuracy | ±1.5db | ±1.5db | | 測量精確度 | | frequency range | 31.5hz-8.5khz | 31.5hz-8.5khz | | 頻率響應 | | linearity range | 50db | 50db | | 動態(tài)范圍 | | ac/dc output | √ | √ | | ac/dc 信號輸出 | | auto power shut off | √ | √ | | 自動關機功能 | | low battery indication | √ | √ | | 低電顯示功能 | | over range indication | √ | √ | | 過載提示 | | digit & resolution | 5digits & 0.1db | 5digits & 0.1db | | 數位及分辨率 | | time weighting se-lection | fast/slow | fast/slow | | 動態(tài)特性選擇 | | microphone | 1/2 inch electret condenser microphone | | 麥克風 | 1/2 英寸電容式麥克風 |
| | frequency weighting | a & c | a & c | | 頻率加權特性 | | sound measuring level se-lection | √ | √ | | 測量檔位選擇 | | max hold function | √ | √ | | 最大值鎖定 | | sampling frequency | 2 times/sec | 2 times/sec | | 取樣頻率 |
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| | | | | general characteristics | 一般特征 | | power | 9v (alkaline or dc adapter) | 6v (4＊aa alkaline or dc adapter) | | 供電 | 9v堿性電池或者電源適配器 | 4節(jié)1.5vaa堿性電池或6v電源適配器 | | lcd size | 30＊50mm | 30＊50mm | | lcd尺寸 | | product color | ivory | ivory | | 產品顏色 | 象牙白 | 象牙白 | | product net weight | 178g | 300g(include battery) | | 產品凈重 | | product size | 207＊70＊29mm | 265＊70＊35mm | | 產品尺寸 |
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| packing information | 包裝 | | 包裝方式1(中國) | 彩盒包裝 | 彩盒包裝 | | 標準外箱容量 | 20 | 20 | | 標準外箱尺寸 | 55.0＊45.0＊26.5cm | 57.0＊51.7＊23.8cm | | 標準外箱毛重 | 13.96kg | 10.5kg | | 包裝方式2(other countries) | blister | blister | | standard quantity per carton | 20 | 20 | | standard carton size | 41.0＊37.5＊33.2cm | 41.0＊37.5＊33.2cm | | standard carton gross weight | 5.76kg | 6.2kg |
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