เครื่องวัดเสียง รุ่น 407735 แบรนด์ Extech

Sound Level Meter

Features

• Provides 2dB accuracy
• High and Low measuring ranges
• Max Hold with reset button
• Built-in calibration check (94dB)
• Analog AC/DC outputs for connection to an analyzer or recorder
• Tripod mount ideal for field use

Specifications

• General Specifications
• Display 3-1/2 digit (2000 count) LCD
• Display update rate 0.5 seconds
• Microphone 0.5” Electret condensor
• Measurement Bandwidth 31.5Hz to 8KHz
• Dynamic range 65dB
• Measurement Range 35 to 130dB (Low: 35 to 90; High: 65 to 130dB)
• Frequency weighting ‘A’ and ‘C’ (selectable)
• Accuracy / Resolution ± 2.0dB / 0.1dB
• Maximum Hold decay time
• Response time Fast: 125 milliseconds / Slow: 1 second
• Built-in calibration check 1KHz internal sine wave @ 94dB
• AC Analog output 0.65VAC rms (full scale); 600 Ω output impedance
• DC Analog output 10mVDC / dB; 100 Ω output impedance (approx).
• Power 9V Battery
• Battery life 50 hours (typical); Low battery indicator alerts user
• Operating temperature 32 to 104°F (0 to 40°C)
• Operating humidity 10 to 90% RH
• Dimensions/weight 9.45 x 2.68 x 1” (240 x 68 x 25mm) / 6.75oz (210g)