| general features & specifications | 一般功能和规格 | | | ar-814 | ar-824 | | measuring range | 30～130dba | 30～130dba | | 测量范围 | 35～130dbc | 35～130dbc | | accuracy | ±1.5db | ±1.5db | | 测量精确度 | | frequency range | 31.5hz-8.5khz | 31.5hz-8.5khz | | 频率响应 | | linearity range | 50db | 50db | | 动态范围 | | ac/dc output | √ | √ | | ac/dc 信号输出 | | auto power shut off | √ | √ | | 自动关机功能 | | low battery indication | √ | √ | | 低电显示功能 | | over range indication | √ | √ | | 过载提示 | | digit & resolution | 5digits & 0.1db | 5digits & 0.1db | | 数位及分辨率 | | time weighting se-lection | fast/slow | fast/slow | | 动态特性选择 | | microphone | 1/2 inch electret condenser microphone | | 麦克风 | 1/2 英寸电容式麦克风 | | | frequency weighting | a & c | a & c | | 频率加权特性 | | sound measuring level se-lection | √ | √ | | 测量档位选择 | | max hold function | √ | √ | | Z大值锁定 | | sampling frequency | 2 times/sec | 2 times/sec | | 取样频率 | |
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| | | | | general characteristics | 一般特征 | | power | 9v (alkaline or dc adapter) | 6v (4＊aa alkaline or dc adapter) | | 供电 | 9v碱性电池或者电源适配器 | 4节1.5vaa碱性电池或6v电源适配器 | | lcd size | 30＊50mm | 30＊50mm | | lcd尺寸 | | product color | ivory | ivory | | 产品颜色 | 象牙白 | 象牙白 | | product net weight | 178g | 300g(include battery) | | 产品净重 | | product size | 207＊70＊29mm | 265＊70＊35mm | | 产品尺寸 | |
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| packing information | 包装 | | 包装方式1(中国) | 彩盒包装 | 彩盒包装 | | 标准外箱容量 | 20 | 20 | | 标准外箱尺寸 | 55.0＊45.0＊26.5cm | 57.0＊51.7＊23.8cm | | 标准外箱毛重 | 13.96kg | 10.5kg | | 包装方式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 | |
