... Comply with standard IEC 61672-1:2002 Class 2 2.Frequency Range:20Hz~12.5KHz 3.Wide dynamic range 4.Small ... -15 °C to 50 °C Complies with IEC 61672 Class 2 USESWidely use in Industrial Noise Surveys ; machinery, vehicles, ... , SF, S, IF, S, I, PeakFrequency Range20 Hz ~ 12.5 kHzMeas. Upper Range>130 dBSelf—generated Noise< 30 dBA ... m, 1 h, 2 h, 4 h, 8 h, 12 h, 16 h, 24 h1 s ~ 24 hRS232 Interface ...