美國Extech 407735型數顯式雙范圍噪音計
美國Extech 407735型數顯式雙范圍噪音計（內置校準器）特點：
高低量程可切換
最大值鎖定，復位功能
內置校準器（94dB)
模擬AC/DC輸出，連接分析機和記錄器
可使用三腳架用於野外測量
美國Extech 407735型數顯式雙范圍噪音計技術參數
量程：LOW-35～90dB High-75～130dB
精度：±1.5dB
A/C加權切換
快慢響應時間可選
Features:
• A and C weighting
• High and Low measuring ranges:
Model 407735- Low (35 to 100dB), High (65 to 130dB)現已停產
Model 407736- Low (35 to 90dB), High (75 to 130dB)
• 0.1dB resolution
• Fast/slow response
• Max Hold with reset button
• Model 407736 meets ANSI and IEC 651 Type II standards
• Large 0.5" 3-1/2 digit LCD display
• Built-in calibration check (94dB)
• Tripod mount and analog DC/AC conditioned outputs of 10mV/dB
• Utilizes 0.49"(12.3mm) condenser microphone
• Dimensions: 9.5 x 2.7 x 1" (241 x 69 x 25mm)
Weight: 7.6 oz (215g)
• Complete with hard vinyl case and 9V battery
Ordering Information:
407735 ....................Digital Sound Level Meter, 2dB accuracy
407735-NIST..........407735 with NIST Certificate
407736 ....................Digital Sound Level Meter, 1.5dB accuracy
407736-NIST..........407736 with NIST Certificate
407766 ....................94/114dB Sound Level Calibrator
40705X ....................AC/DC Recorder Output Cable
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