ST821 – เครื่องวัดระดับเสียง

• ช่วงการวัด: A   30dB ~ 130dB, C 35dB ~ 130dB
• แสดงผล  : 4 หลัก

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Technical data 

Microphone: 1/2 polarization capacity microphone 

Range: A-weighting: 30dB ~ 130dB 

C- weighting: 35dB ~ 130dB 

Measurement frequency range: 31.5Hz to 8kHz 

Time weighting characteristics: FAST; SLOW 

Calibration: 94dB 

Data recording; 10 

Display: LCD with 4 digits, 0.1dB resolution, sampling rate 1s 

Bar graph: Scale range 50dB, 1dBresolution 

Warming indicators: OVER (overload), UNDER(underload) 

DC output: 0-2.5V, 25mV/dB 

Ambient conditions: 0 ~ 40º C; 10-80%RH 

Storage condition: -10 ~60º C, 10 ~70%RH 

Power supply: 1x 9.0V, 6F22 batteries 

Size: 220*73*35 mm 

Weight: 290g (batteries included)